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android / platform / external / qt / 7bfefd596b628604816a01c904428ab99099b10d / . / Windows-4.7.4 / tools / designer / src / lib / shared / qlayout_widget.cpp
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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qlayout_widget_p.h"
#include "qdesigner_utils_p.h"
#include "layout_p.h"
#include "layoutinfo_p.h"
#include "invisible_widget_p.h"
#include "qdesigner_widgetitem_p.h"
#include <QtDesigner/QDesignerFormWindowInterface>
#include <QtDesigner/QExtensionManager>
#include <QtDesigner/QDesignerFormEditorInterface>
#include <QtDesigner/QDesignerPropertySheetExtension>
#include <QtDesigner/QDesignerWidgetFactoryInterface>
#include <QtGui/QPainter>
#include <QtGui/QHBoxLayout>
#include <QtGui/QVBoxLayout>
#include <QtGui/QGridLayout>
#include <QtGui/QFormLayout>
#include <QtGui/qevent.h>
#include <QtCore/qdebug.h>
#include <QtCore/QtAlgorithms>
#include <QtCore/QMap>
#include <QtCore/QStack>
#include <QtCore/QPair>
#include <QtCore/QSet>
enum { ShiftValue = 1 };
enum { debugLayout = 0 };
enum { FormLayoutColumns = 2 };
enum { indicatorSize = 2 };
// Grid/form Helpers: get info (overloads to make templates work)
namespace { // Do not use static, will break HP-UX due to templates
QT_USE_NAMESPACE
// overloads to make templates over QGridLayout/QFormLayout work
inline int gridRowCount(const QGridLayout *gridLayout)
{
return gridLayout->rowCount();
}
inline int gridColumnCount(const QGridLayout *gridLayout)
{
return gridLayout->columnCount();
}
// QGridLayout/QFormLayout Helpers: get item position (overloads to make templates work)
inline void getGridItemPosition(QGridLayout *gridLayout, int index,
int *row, int *column, int *rowspan, int *colspan)
{
gridLayout->getItemPosition(index, row, column, rowspan, colspan);
}
QRect gridItemInfo(QGridLayout *grid, int index)
{
int row, column, rowSpan, columnSpan;
// getItemPosition is not const, grmbl..
grid->getItemPosition(index, &row, &column, &rowSpan, &columnSpan);
return QRect(column, row, columnSpan, rowSpan);
}
inline int gridRowCount(const QFormLayout *formLayout) { return formLayout->rowCount(); }
inline int gridColumnCount(const QFormLayout *) { return FormLayoutColumns; }
inline void getGridItemPosition(QFormLayout *formLayout, int index, int *row, int *column, int *rowspan, int *colspan)
{
qdesigner_internal::getFormLayoutItemPosition(formLayout, index, row, column, rowspan, colspan);
}
QRect gridItemInfo(const QFormLayout *form, int index)
{
int row;
int column;
int colspan;
qdesigner_internal::getFormLayoutItemPosition(form, index, &row, &column, 0, &colspan);
return QRect(column, row, colspan, 1);
}
} // namespace anonymous
QT_BEGIN_NAMESPACE
static const char *objectNameC = "objectName";
static const char *sizeConstraintC = "sizeConstraint";
/* A padding spacer element that is used to represent an empty form layout cell. It should grow with its cell.
* Should not be used on a grid as it causes resizing inconsistencies */
namespace qdesigner_internal {
class PaddingSpacerItem : public QSpacerItem {
public:
PaddingSpacerItem() : QSpacerItem(0, 0, QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding) {}
virtual Qt::Orientations expandingDirections () const { return Qt::Vertical | Qt::Horizontal; }
};
}
static inline QSpacerItem *createGridSpacer()
{
return new QSpacerItem(0, 0);
}
static inline QSpacerItem *createFormSpacer()
{
return new qdesigner_internal::PaddingSpacerItem;
}
// QGridLayout/QFormLayout Helpers: Debug items of GridLikeLayout
template <class GridLikeLayout>
static QDebug debugGridLikeLayout(QDebug str, const GridLikeLayout &gl)
{
const int count = gl.count();
str << "Grid: " << gl.objectName() << gridRowCount(&gl) << " rows x " << gridColumnCount(&gl)
<< " cols " << count << " items\n";
for (int i = 0; i < count; i++) {
QLayoutItem *item = gl.itemAt(i);
str << "Item " << i << item << item->widget() << gridItemInfo(const_cast<GridLikeLayout *>(&gl), i) << " empty=" << qdesigner_internal::LayoutInfo::isEmptyItem(item) << "\n";
}
return str;
}
static inline QDebug operator<<(QDebug str, const QGridLayout &gl) { return debugGridLikeLayout(str, gl); }
static inline QDebug operator<<(QDebug str, const QFormLayout &fl) { return debugGridLikeLayout(str, fl); }
static inline bool isEmptyFormLayoutRow(const QFormLayout *fl, int row)
{
// Spanning can never be empty
if (fl->itemAt(row, QFormLayout::SpanningRole))
return false;
return qdesigner_internal::LayoutInfo::isEmptyItem(fl->itemAt(row, QFormLayout::LabelRole)) && qdesigner_internal::LayoutInfo::isEmptyItem(fl->itemAt(row, QFormLayout::FieldRole));
}
static inline bool canSimplifyFormLayout(const QFormLayout *formLayout, const QRect &restrictionArea)
{
if (restrictionArea.x() >= FormLayoutColumns)
return false;
// Try to find empty rows
const int bottomCheckRow = qMin(formLayout->rowCount(), restrictionArea.top() + restrictionArea.height());
for (int r = restrictionArea.y(); r < bottomCheckRow; r++)
if (isEmptyFormLayoutRow(formLayout, r))
return true;
return false;
}
// recreate a managed layout (which does not automagically remove
// empty rows/columns like grid or form layout) in case it needs to shrink
static QLayout *recreateManagedLayout(const QDesignerFormEditorInterface *core, QWidget *w, QLayout *lt)
{
const qdesigner_internal::LayoutInfo::Type t = qdesigner_internal::LayoutInfo::layoutType(core, lt);
qdesigner_internal::LayoutProperties properties;
const int mask = properties.fromPropertySheet(core, lt, qdesigner_internal::LayoutProperties::AllProperties);
qdesigner_internal::LayoutInfo::deleteLayout(core, w);
QLayout *rc = core->widgetFactory()->createLayout(w, 0, t);
properties.toPropertySheet(core, rc, mask, true);
return rc;
}
// QGridLayout/QFormLayout Helpers: find an item on a form/grid. Return index
template <class GridLikeLayout>
int findGridItemAt(GridLikeLayout *gridLayout, int at_row, int at_column)
{
Q_ASSERT(gridLayout);
const int count = gridLayout->count();
for (int index = 0; index < count; index++) {
int row, column, rowspan, colspan;
getGridItemPosition(gridLayout, index, &row, &column, &rowspan, &colspan);
if (at_row >= row && at_row < (row + rowspan)
&& at_column >= column && at_column < (column + colspan)) {
return index;
}
}
return -1;
}
// QGridLayout/QFormLayout Helpers: remove dummy spacers on form/grid
template <class GridLikeLayout>
static bool removeEmptyCellsOnGrid(GridLikeLayout *grid, const QRect &area)
{
// check if there are any items in the way. Should be only spacers
// Unique out items that span rows/columns.
QVector<int> indexesToBeRemoved;
indexesToBeRemoved.reserve(grid->count());
const int rightColumn = area.x() + area.width();
const int bottomRow = area.y() + area.height();
for (int c = area.x(); c < rightColumn; c++)
for (int r = area.y(); r < bottomRow; r++) {
const int index = findGridItemAt(grid, r ,c);
if (index != -1)
if (QLayoutItem *item = grid->itemAt(index)) {
if (qdesigner_internal::LayoutInfo::isEmptyItem(item)) {
if (indexesToBeRemoved.indexOf(index) == -1)
indexesToBeRemoved.push_back(index);
} else {
return false;
}
}
}
// remove, starting from last
if (!indexesToBeRemoved.empty()) {
qStableSort(indexesToBeRemoved.begin(), indexesToBeRemoved.end());
for (int i = indexesToBeRemoved.size() - 1; i >= 0; i--)
delete grid->takeAt(indexesToBeRemoved[i]);
}
return true;
}
namespace qdesigner_internal {
// --------- LayoutProperties
LayoutProperties::LayoutProperties()
{
clear();
}
void LayoutProperties::clear()
{
qFill(m_margins, m_margins + MarginCount, 0);
qFill(m_marginsChanged, m_marginsChanged + MarginCount, false);
qFill(m_spacings, m_spacings + SpacingsCount, 0);
qFill(m_spacingsChanged, m_spacingsChanged + SpacingsCount, false);
m_objectName = QVariant();
m_objectNameChanged = false;
m_sizeConstraint = QVariant(QLayout::SetDefaultConstraint);
m_sizeConstraintChanged = false;
m_fieldGrowthPolicyChanged = m_rowWrapPolicyChanged = m_labelAlignmentChanged = m_formAlignmentChanged = false;
m_fieldGrowthPolicy = m_rowWrapPolicy = m_formAlignment = QVariant();
m_boxStretchChanged = m_gridRowStretchChanged = m_gridColumnStretchChanged = m_gridRowMinimumHeightChanged = false;
m_boxStretch = m_gridRowStretch = m_gridColumnStretch = m_gridRowMinimumHeight = QVariant();
}
int LayoutProperties::visibleProperties(const QLayout *layout)
{
// Grid like layout have 2 spacings.
const bool isFormLayout = qobject_cast<const QFormLayout*>(layout);
const bool isGridLike = qobject_cast<const QGridLayout*>(layout) || isFormLayout;
int rc = ObjectNameProperty|LeftMarginProperty|TopMarginProperty|RightMarginProperty|BottomMarginProperty|
SizeConstraintProperty;
rc |= isGridLike ? (HorizSpacingProperty|VertSpacingProperty) : SpacingProperty;
if (isFormLayout) {
rc |= FieldGrowthPolicyProperty|RowWrapPolicyProperty|LabelAlignmentProperty|FormAlignmentProperty;
} else {
if (isGridLike) {
rc |= GridRowStretchProperty|GridColumnStretchProperty|GridRowMinimumHeightProperty|GridColumnMinimumWidthProperty;
} else {
rc |= BoxStretchProperty;
}
}
return rc;
}
static const char *marginPropertyNamesC[] = {"leftMargin", "topMargin", "rightMargin", "bottomMargin"};
static const char *spacingPropertyNamesC[] = {"spacing", "horizontalSpacing", "verticalSpacing" };
static const char *fieldGrowthPolicyPropertyC = "fieldGrowthPolicy";
static const char *rowWrapPolicyPropertyC = "rowWrapPolicy";
static const char *labelAlignmentPropertyC = "labelAlignment";
static const char *formAlignmentPropertyC = "formAlignment";
static const char *boxStretchPropertyC = "stretch";
static const char *gridRowStretchPropertyC = "rowStretch";
static const char *gridColumnStretchPropertyC = "columnStretch";
static const char *gridRowMinimumHeightPropertyC = "rowMinimumHeight";
static const char *gridColumnMinimumWidthPropertyC = "columnMinimumWidth";
static bool intValueFromSheet(const QDesignerPropertySheetExtension *sheet, const QString &name, int *value, bool *changed)
{
const int sheetIndex = sheet->indexOf(name);
if (sheetIndex == -1)
return false;
*value = sheet->property(sheetIndex).toInt();
*changed = sheet->isChanged(sheetIndex);
return true;
}
static void variantPropertyFromSheet(int mask, int flag, const QDesignerPropertySheetExtension *sheet, const QString &name,
QVariant *value, bool *changed, int *returnMask)
{
if (mask & flag) {
const int sIndex = sheet->indexOf(name);
if (sIndex != -1) {
*value = sheet->property(sIndex);
*changed = sheet->isChanged(sIndex);
*returnMask |= flag;
}
}
}
int LayoutProperties::fromPropertySheet(const QDesignerFormEditorInterface *core, QLayout *l, int mask)
{
int rc = 0;
const QDesignerPropertySheetExtension *sheet = qt_extension<QDesignerPropertySheetExtension*>(core->extensionManager(), l);
Q_ASSERT(sheet);
// name
if (mask & ObjectNameProperty) {
const int nameIndex = sheet->indexOf(QLatin1String(objectNameC));
Q_ASSERT(nameIndex != -1);
m_objectName = sheet->property(nameIndex);
m_objectNameChanged = sheet->isChanged(nameIndex);
rc |= ObjectNameProperty;
}
// -- Margins
const int marginFlags[MarginCount] = { LeftMarginProperty, TopMarginProperty, RightMarginProperty, BottomMarginProperty};
for (int i = 0; i < MarginCount; i++)
if (mask & marginFlags[i])
if (intValueFromSheet(sheet, QLatin1String(marginPropertyNamesC[i]), m_margins + i, m_marginsChanged + i))
rc |= marginFlags[i];
const int spacingFlags[] = { SpacingProperty, HorizSpacingProperty, VertSpacingProperty};
for (int i = 0; i < SpacingsCount; i++)
if (mask & spacingFlags[i])
if (intValueFromSheet(sheet, QLatin1String(spacingPropertyNamesC[i]), m_spacings + i, m_spacingsChanged + i))
rc |= spacingFlags[i];
// sizeConstraint, flags
variantPropertyFromSheet(mask, SizeConstraintProperty, sheet, QLatin1String(sizeConstraintC), &m_sizeConstraint, &m_sizeConstraintChanged, &rc);
variantPropertyFromSheet(mask, FieldGrowthPolicyProperty, sheet, QLatin1String(fieldGrowthPolicyPropertyC), &m_fieldGrowthPolicy, &m_fieldGrowthPolicyChanged, &rc);
variantPropertyFromSheet(mask, RowWrapPolicyProperty, sheet, QLatin1String(rowWrapPolicyPropertyC), &m_rowWrapPolicy, &m_rowWrapPolicyChanged, &rc);
variantPropertyFromSheet(mask, LabelAlignmentProperty, sheet, QLatin1String(labelAlignmentPropertyC), &m_labelAlignment, &m_labelAlignmentChanged, &rc);
variantPropertyFromSheet(mask, FormAlignmentProperty, sheet, QLatin1String(formAlignmentPropertyC), &m_formAlignment, &m_formAlignmentChanged, &rc);
variantPropertyFromSheet(mask, BoxStretchProperty, sheet, QLatin1String(boxStretchPropertyC), &m_boxStretch, & m_boxStretchChanged, &rc);
variantPropertyFromSheet(mask, GridRowStretchProperty, sheet, QLatin1String(gridRowStretchPropertyC), &m_gridRowStretch, &m_gridRowStretchChanged, &rc);
variantPropertyFromSheet(mask, GridColumnStretchProperty, sheet, QLatin1String(gridColumnStretchPropertyC), &m_gridColumnStretch, &m_gridColumnStretchChanged, &rc);
variantPropertyFromSheet(mask, GridRowMinimumHeightProperty, sheet, QLatin1String(gridRowMinimumHeightPropertyC), &m_gridRowMinimumHeight, &m_gridRowMinimumHeightChanged, &rc);
variantPropertyFromSheet(mask, GridColumnMinimumWidthProperty, sheet, QLatin1String(gridColumnMinimumWidthPropertyC), &m_gridColumnMinimumWidth, &m_gridColumnMinimumWidthChanged, &rc);
return rc;
}
static bool intValueToSheet(QDesignerPropertySheetExtension *sheet, const QString &name, int value, bool changed, bool applyChanged)
{
const int sheetIndex = sheet->indexOf(name);
if (sheetIndex == -1) {
qWarning() << " LayoutProperties: Attempt to set property " << name << " that does not exist for the layout.";
return false;
}
sheet->setProperty(sheetIndex, QVariant(value));
if (applyChanged)
sheet->setChanged(sheetIndex, changed);
return true;
}
static void variantPropertyToSheet(int mask, int flag, bool applyChanged, QDesignerPropertySheetExtension *sheet, const QString &name,
const QVariant &value, bool changed, int *returnMask)
{
if (mask & flag) {
const int sIndex = sheet->indexOf(name);
if (sIndex != -1) {
sheet->setProperty(sIndex, value);
if (applyChanged)
sheet->setChanged(sIndex, changed);
*returnMask |= flag;
}
}
}
int LayoutProperties::toPropertySheet(const QDesignerFormEditorInterface *core, QLayout *l, int mask, bool applyChanged) const
{
int rc = 0;
QDesignerPropertySheetExtension *sheet = qt_extension<QDesignerPropertySheetExtension*>(core->extensionManager(), l);
Q_ASSERT(sheet);
// name
if (mask & ObjectNameProperty) {
const int nameIndex = sheet->indexOf(QLatin1String(objectNameC));
Q_ASSERT(nameIndex != -1);
sheet->setProperty(nameIndex, m_objectName);
if (applyChanged)
sheet->setChanged(nameIndex, m_objectNameChanged);
rc |= ObjectNameProperty;
}
// margins
const int marginFlags[MarginCount] = { LeftMarginProperty, TopMarginProperty, RightMarginProperty, BottomMarginProperty};
for (int i = 0; i < MarginCount; i++)
if (mask & marginFlags[i])
if (intValueToSheet(sheet, QLatin1String(marginPropertyNamesC[i]), m_margins[i], m_marginsChanged[i], applyChanged))
rc |= marginFlags[i];
const int spacingFlags[] = { SpacingProperty, HorizSpacingProperty, VertSpacingProperty};
for (int i = 0; i < SpacingsCount; i++)
if (mask & spacingFlags[i])
if (intValueToSheet(sheet, QLatin1String(spacingPropertyNamesC[i]), m_spacings[i], m_spacingsChanged[i], applyChanged))
rc |= spacingFlags[i];
// sizeConstraint
variantPropertyToSheet(mask, SizeConstraintProperty, applyChanged, sheet, QLatin1String(sizeConstraintC), m_sizeConstraint, m_sizeConstraintChanged, &rc);
variantPropertyToSheet(mask, FieldGrowthPolicyProperty, applyChanged, sheet, QLatin1String(fieldGrowthPolicyPropertyC), m_fieldGrowthPolicy, &m_fieldGrowthPolicyChanged, &rc);
variantPropertyToSheet(mask, RowWrapPolicyProperty, applyChanged, sheet, QLatin1String(rowWrapPolicyPropertyC), m_rowWrapPolicy, m_rowWrapPolicyChanged, &rc);
variantPropertyToSheet(mask, LabelAlignmentProperty, applyChanged, sheet, QLatin1String(labelAlignmentPropertyC), m_labelAlignment, m_labelAlignmentChanged, &rc);
variantPropertyToSheet(mask, FormAlignmentProperty, applyChanged, sheet, QLatin1String(formAlignmentPropertyC), m_formAlignment, m_formAlignmentChanged, &rc);
variantPropertyToSheet(mask, BoxStretchProperty, applyChanged, sheet, QLatin1String(boxStretchPropertyC), m_boxStretch, m_boxStretchChanged, &rc);
variantPropertyToSheet(mask, GridRowStretchProperty, applyChanged, sheet, QLatin1String(gridRowStretchPropertyC), m_gridRowStretch, m_gridRowStretchChanged, &rc);
variantPropertyToSheet(mask, GridColumnStretchProperty, applyChanged, sheet, QLatin1String(gridColumnStretchPropertyC), m_gridColumnStretch, m_gridColumnStretchChanged, &rc);
variantPropertyToSheet(mask, GridRowMinimumHeightProperty, applyChanged, sheet, QLatin1String(gridRowMinimumHeightPropertyC), m_gridRowMinimumHeight, m_gridRowMinimumHeightChanged, &rc);
variantPropertyToSheet(mask, GridColumnMinimumWidthProperty, applyChanged, sheet, QLatin1String(gridColumnMinimumWidthPropertyC), m_gridColumnMinimumWidth, m_gridColumnMinimumWidthChanged, &rc);
return rc;
}
// ---------------- LayoutHelper
LayoutHelper::LayoutHelper()
{
}
LayoutHelper::~LayoutHelper()
{
}
int LayoutHelper::indexOf(const QLayout *lt, const QWidget *widget)
{
if (!lt)
return -1;
const int itemCount = lt->count();
for (int i = 0; i < itemCount; i++)
if (lt->itemAt(i)->widget() == widget)
return i;
return -1;
}
QRect LayoutHelper::itemInfo(QLayout *lt, const QWidget *widget) const
{
const int index = indexOf(lt, widget);
if (index == -1) {
qWarning() << "LayoutHelper::itemInfo: " << widget << " not in layout " << lt;
return QRect(0, 0, 1, 1);
}
return itemInfo(lt, index);
}
// ---------------- BoxLayoutHelper
class BoxLayoutHelper : public LayoutHelper {
public:
BoxLayoutHelper(const Qt::Orientation orientation) : m_orientation(orientation) {}
virtual QRect itemInfo(QLayout *lt, int index) const;
virtual void insertWidget(QLayout *lt, const QRect &info, QWidget *w);
virtual void removeWidget(QLayout *lt, QWidget *widget);
virtual void replaceWidget(QLayout *lt, QWidget *before, QWidget *after);
virtual void pushState(const QDesignerFormEditorInterface *, const QWidget *);
virtual void popState(const QDesignerFormEditorInterface *, QWidget *);
virtual bool canSimplify(const QDesignerFormEditorInterface *, const QWidget *, const QRect &) const { return false; }
virtual void simplify(const QDesignerFormEditorInterface *, QWidget *, const QRect &) {}
// Helper for restoring layout states
typedef QVector <QLayoutItem *> LayoutItemVector;
static LayoutItemVector disassembleLayout(QLayout *lt);
static QLayoutItem *findItemOfWidget(const LayoutItemVector &lv, QWidget *w);
private:
typedef QVector<QWidget *> BoxLayoutState;
static BoxLayoutState state(const QBoxLayout*lt);
QStack<BoxLayoutState> m_states;
const Qt::Orientation m_orientation;
};
QRect BoxLayoutHelper::itemInfo(QLayout * /*lt*/, int index) const
{
return m_orientation == Qt::Horizontal ? QRect(index, 0, 1, 1) : QRect(0, index, 1, 1);
}
void BoxLayoutHelper::insertWidget(QLayout *lt, const QRect &info, QWidget *w)
{
QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem.
QBoxLayout *boxLayout = qobject_cast<QBoxLayout *>(lt);
Q_ASSERT(boxLayout);
boxLayout->insertWidget(m_orientation == Qt::Horizontal ? info.x() : info.y(), w);
}
void BoxLayoutHelper::removeWidget(QLayout *lt, QWidget *widget)
{
QBoxLayout *boxLayout = qobject_cast<QBoxLayout *>(lt);
Q_ASSERT(boxLayout);
boxLayout->removeWidget(widget);
}
void BoxLayoutHelper::replaceWidget(QLayout *lt, QWidget *before, QWidget *after)
{
bool ok = false;
QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem.
if (QBoxLayout *boxLayout = qobject_cast<QBoxLayout *>(lt)) {
const int index = boxLayout->indexOf(before);
if (index != -1) {
const bool visible = before->isVisible();
delete boxLayout->takeAt(index);
if (visible)
before->hide();
before->setParent(0);
boxLayout->insertWidget(index, after);
ok = true;
}
}
if (!ok)
qWarning() << "BoxLayoutHelper::replaceWidget : Unable to replace " << before << " by " << after << " in " << lt;
}
BoxLayoutHelper::BoxLayoutState BoxLayoutHelper::state(const QBoxLayout*lt)
{
BoxLayoutState rc;
if (const int count = lt->count()) {
rc.reserve(count);
for (int i = 0; i < count; i++)
if (QWidget *w = lt->itemAt(i)->widget())
rc.push_back(w);
}
return rc;
}
void BoxLayoutHelper::pushState(const QDesignerFormEditorInterface *core, const QWidget *w)
{
const QBoxLayout *boxLayout = qobject_cast<const QBoxLayout *>(LayoutInfo::managedLayout(core, w));
Q_ASSERT(boxLayout);
m_states.push(state(boxLayout));
}
QLayoutItem *BoxLayoutHelper::findItemOfWidget(const LayoutItemVector &lv, QWidget *w)
{
const LayoutItemVector::const_iterator cend = lv.constEnd();
for (LayoutItemVector::const_iterator it = lv.constBegin(); it != cend; ++it)
if ( (*it)->widget() == w)
return *it;
return 0;
}
BoxLayoutHelper::LayoutItemVector BoxLayoutHelper::disassembleLayout(QLayout *lt)
{
// Take items
const int count = lt->count();
if (count == 0)
return LayoutItemVector();
LayoutItemVector rc;
rc.reserve(count);
for (int i = count - 1; i >= 0; i--)
rc.push_back(lt->takeAt(i));
return rc;
}
void BoxLayoutHelper::popState(const QDesignerFormEditorInterface *core, QWidget *w)
{
QBoxLayout *boxLayout = qobject_cast<QBoxLayout *>(LayoutInfo::managedLayout(core, w));
Q_ASSERT(boxLayout);
const BoxLayoutState savedState = m_states.pop();
const BoxLayoutState currentState = state(boxLayout);
// Check for equality/empty. Note that this will currently
// always trigger as box layouts do not have a state apart from
// the order and there is no layout order editor yet.
if (savedState == state(boxLayout))
return;
const int count = savedState.size();
Q_ASSERT(count == currentState.size());
// Take items and reassemble in saved order
const LayoutItemVector items = disassembleLayout(boxLayout);
for (int i = 0; i < count; i++) {
QLayoutItem *item = findItemOfWidget(items, savedState[i]);
Q_ASSERT(item);
boxLayout->addItem(item);
}
}
// Grid Layout state. Datatypically store the state of a GridLayout as a map of
// widgets to QRect(columns, rows) and size. Used to store the state for undo operations
// that do not change the widgets within the layout; also provides some manipulation
// functions and ability to apply the state to a layout provided its widgets haven't changed.
struct GridLayoutState {
GridLayoutState();
void fromLayout(QGridLayout *l);
void applyToLayout(const QDesignerFormEditorInterface *core, QWidget *w) const;
void insertRow(int row);
void insertColumn(int column);
bool simplify(const QRect &r, bool testOnly);
void removeFreeRow(int row);
void removeFreeColumn(int column);
// State of a cell in one dimension
enum DimensionCellState {
Free,
Spanned, // Item spans it
Occupied // Item bordering on it
};
// Horiontal, Vertical pair of state
typedef QPair<DimensionCellState, DimensionCellState> CellState;
typedef QVector<CellState> CellStates;
// Figure out states of a cell and return as a flat vector of
// [column1, column2,...] (address as row * columnCount + col)
static CellStates cellStates(const QList<QRect> &rects, int numRows, int numColumns);
typedef QMap<QWidget *, QRect> WidgetItemMap;
WidgetItemMap widgetItemMap;
int rowCount;
int colCount;
};
static inline bool needsSpacerItem(const GridLayoutState::CellState &cs) {
return cs.first == GridLayoutState::Free && cs.second == GridLayoutState::Free;
}
static inline QDebug operator<<(QDebug str, const GridLayoutState &gs)
{
str << "GridLayoutState: " << gs.rowCount << " rows x " << gs.colCount
<< " cols " << gs.widgetItemMap.size() << " items\n";
const GridLayoutState::WidgetItemMap::const_iterator wcend = gs.widgetItemMap.constEnd();
for (GridLayoutState::WidgetItemMap::const_iterator it = gs.widgetItemMap.constBegin(); it != wcend; ++it)
str << "Item " << it.key() << it.value() << '\n';
return str;
}
GridLayoutState::GridLayoutState() :
rowCount(0),
colCount(0)
{
}
GridLayoutState::CellStates GridLayoutState::cellStates(const QList<QRect> &rects, int numRows, int numColumns)
{
CellStates rc = CellStates(numRows * numColumns, CellState(Free, Free));
const QList<QRect>::const_iterator rcend = rects.constEnd();
for (QList<QRect>::const_iterator it = rects.constBegin(); it != rcend; ++it) {
const int leftColumn = it->x();
const int topRow = it->y();
const int rightColumn = leftColumn + it->width() - 1;
const int bottomRow = topRow + it->height() - 1;
for (int r = topRow; r <= bottomRow; r++)
for (int c = leftColumn; c <= rightColumn; c++) {
const int flatIndex = r * numColumns + c;
// Bordering horizontally?
DimensionCellState &horizState = rc[flatIndex].first;
if (c == leftColumn || c == rightColumn) {
horizState = Occupied;
} else {
if (horizState < Spanned)
horizState = Spanned;
}
// Bordering vertically?
DimensionCellState &vertState = rc[flatIndex].second;
if (r == topRow || r == bottomRow) {
vertState = Occupied;
} else {
if (vertState < Spanned)
vertState = Spanned;
}
}
}
if (debugLayout) {
qDebug() << "GridLayoutState::cellStates: " << numRows << " x " << numColumns;
for (int r = 0; r < numRows; r++)
for (int c = 0; c < numColumns; c++)
qDebug() << " Row: " << r << " column: " << c << rc[r * numColumns + c];
}
return rc;
}
void GridLayoutState::fromLayout(QGridLayout *l)
{
rowCount = l->rowCount();
colCount = l->columnCount();
const int count = l->count();
for (int i = 0; i < count; i++) {
QLayoutItem *item = l->itemAt(i);
if (!LayoutInfo::isEmptyItem(item))
widgetItemMap.insert(item->widget(), gridItemInfo(l, i));
}
}
void GridLayoutState::applyToLayout(const QDesignerFormEditorInterface *core, QWidget *w) const
{
typedef QMap<QLayoutItem *, QRect> LayoutItemRectMap;
QGridLayout *grid = qobject_cast<QGridLayout *>(LayoutInfo::managedLayout(core, w));
Q_ASSERT(grid);
if (debugLayout)
qDebug() << ">GridLayoutState::applyToLayout" << *this << *grid;
const bool shrink = grid->rowCount() > rowCount || grid->columnCount() > colCount;
// Build a map of existing items to rectangles via widget map, delete spacers
LayoutItemRectMap itemMap;
while (grid->count()) {
QLayoutItem *item = grid->takeAt(0);
if (!LayoutInfo::isEmptyItem(item)) {
QWidget *itemWidget = item->widget();
const WidgetItemMap::const_iterator it = widgetItemMap.constFind(itemWidget);
if (it == widgetItemMap.constEnd())
qFatal("GridLayoutState::applyToLayout: Attempt to apply to a layout that has a widget '%s'/'%s' added after saving the state.",
itemWidget->metaObject()->className(), itemWidget->objectName().toUtf8().constData());
itemMap.insert(item, it.value());
} else {
delete item;
}
}
Q_ASSERT(itemMap.size() == widgetItemMap.size());
// recreate if shrink
if (shrink)
grid = static_cast<QGridLayout*>(recreateManagedLayout(core, w, grid));
// Add widgets items
const LayoutItemRectMap::const_iterator icend = itemMap.constEnd();
for (LayoutItemRectMap::const_iterator it = itemMap.constBegin(); it != icend; ++it) {
const QRect info = it.value();
grid->addItem(it.key(), info.y(), info.x(), info.height(), info.width());
}
// create spacers
const CellStates cs = cellStates(itemMap.values(), rowCount, colCount);
for (int r = 0; r < rowCount; r++)
for (int c = 0; c < colCount; c++)
if (needsSpacerItem(cs[r * colCount + c]))
grid->addItem(createGridSpacer(), r, c);
grid->activate();
if (debugLayout)
qDebug() << "<GridLayoutState::applyToLayout" << *grid;
}
void GridLayoutState::insertRow(int row)
{
rowCount++;
const WidgetItemMap::iterator iend = widgetItemMap.end();
for (WidgetItemMap::iterator it = widgetItemMap.begin(); it != iend; ++it) {
const int topRow = it.value().y();
if (topRow >= row) {
it.value().translate(0, 1);
} else { //Over it: Does it span it -> widen?
const int rowSpan = it.value().height();
if (rowSpan > 1 && topRow + rowSpan > row)
it.value().setHeight(rowSpan + 1);
}
}
}
void GridLayoutState::insertColumn(int column)
{
colCount++;
const WidgetItemMap::iterator iend = widgetItemMap.end();
for (WidgetItemMap::iterator it = widgetItemMap.begin(); it != iend; ++it) {
const int leftColumn = it.value().x();
if (leftColumn >= column) {
it.value().translate(1, 0);
} else { // Left of it: Does it span it -> widen?
const int colSpan = it.value().width();
if (colSpan > 1 && leftColumn + colSpan > column)
it.value().setWidth(colSpan + 1);
}
}
}
// Simplify: Remove empty columns/rows and such ones that are only spanned (shrink
// spanning items).
// 'AB.C.' 'ABC'
// 'DDDD.' ==> 'DDD'
// 'EF.G.' 'EFG'
bool GridLayoutState::simplify(const QRect &r, bool testOnly)
{
// figure out free rows/columns.
QVector<bool> occupiedRows(rowCount, false);
QVector<bool> occupiedColumns(colCount, false);
// Mark everything outside restriction rectangle as occupied
const int restrictionLeftColumn = r.x();
const int restrictionRightColumn = restrictionLeftColumn + r.width();
const int restrictionTopRow = r.y();
const int restrictionBottomRow = restrictionTopRow + r.height();
if (restrictionLeftColumn > 0 || restrictionRightColumn < colCount ||
restrictionTopRow > 0 || restrictionBottomRow < rowCount) {
for (int r = 0; r < rowCount; r++)
if (r < restrictionTopRow || r >= restrictionBottomRow)
occupiedRows[r] = true;
for (int c = 0; c < colCount; c++)
if (c < restrictionLeftColumn || c >= restrictionRightColumn)
occupiedColumns[c] = true;
}
// figure out free fields and tick off occupied rows and columns
const CellStates cs = cellStates(widgetItemMap.values(), rowCount, colCount);
for (int r = 0; r < rowCount; r++)
for (int c = 0; c < colCount; c++) {
const CellState &state = cs[r * colCount + c];
if (state.first == Occupied)
occupiedColumns[c] = true;
if (state.second == Occupied)
occupiedRows[r] = true;
}
// Any free rows/columns?
if (occupiedRows.indexOf(false) == -1 && occupiedColumns.indexOf(false) == -1)
return false;
if (testOnly)
return true;
// remove rows
for (int r = rowCount - 1; r >= 0; r--)
if (!occupiedRows[r])
removeFreeRow(r);
// remove columns
for (int c = colCount - 1; c >= 0; c--)
if (!occupiedColumns[c])
removeFreeColumn(c);
return true;
}
void GridLayoutState::removeFreeRow(int removeRow)
{
const WidgetItemMap::iterator iend = widgetItemMap.end();
for (WidgetItemMap::iterator it = widgetItemMap.begin(); it != iend; ++it) {
const int r = it.value().y();
Q_ASSERT(r != removeRow); // Free rows only
if (r < removeRow) { // Does the item span it? - shrink it
const int rowSpan = it.value().height();
if (rowSpan > 1) {
const int bottomRow = r + rowSpan;
if (bottomRow > removeRow)
it.value().setHeight(rowSpan - 1);
}
} else
if (r > removeRow) // Item below it? - move.
it.value().translate(0, -1);
}
rowCount--;
}
void GridLayoutState::removeFreeColumn(int removeColumn)
{
const WidgetItemMap::iterator iend = widgetItemMap.end();
for (WidgetItemMap::iterator it = widgetItemMap.begin(); it != iend; ++it) {
const int c = it.value().x();
Q_ASSERT(c != removeColumn); // Free columns only
if (c < removeColumn) { // Does the item span it? - shrink it
const int colSpan = it.value().width();
if (colSpan > 1) {
const int rightColumn = c + colSpan;
if (rightColumn > removeColumn)
it.value().setWidth(colSpan - 1);
}
} else
if (c > removeColumn) // Item to the right of it? - move.
it.value().translate(-1, 0);
}
colCount--;
}
// ---------------- GridLayoutHelper
class GridLayoutHelper : public LayoutHelper {
public:
GridLayoutHelper() {}
virtual QRect itemInfo(QLayout *lt, int index) const;
virtual void insertWidget(QLayout *lt, const QRect &info, QWidget *w);
virtual void removeWidget(QLayout *lt, QWidget *widget);
virtual void replaceWidget(QLayout *lt, QWidget *before, QWidget *after);
virtual void pushState(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout);
virtual void popState(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout);
virtual bool canSimplify(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout, const QRect &restrictionArea) const;
virtual void simplify(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout, const QRect &restrictionArea);
static void insertRow(QGridLayout *grid, int row);
private:
QStack<GridLayoutState> m_states;
};
void GridLayoutHelper::insertRow(QGridLayout *grid, int row)
{
GridLayoutState state;
state.fromLayout(grid);
state.insertRow(row);
QDesignerFormWindowInterface *fw = QDesignerFormWindowInterface::findFormWindow(grid);
state.applyToLayout(fw->core(), grid->parentWidget());
}
QRect GridLayoutHelper::itemInfo(QLayout * lt, int index) const
{
QGridLayout *grid = qobject_cast<QGridLayout *>(lt);
Q_ASSERT(grid);
return gridItemInfo(grid, index);
}
void GridLayoutHelper::insertWidget(QLayout *lt, const QRect &info, QWidget *w)
{
QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem.
QGridLayout *gridLayout = qobject_cast<QGridLayout *>(lt);
Q_ASSERT(gridLayout);
// check if there are any items. Should be only spacers, else something is wrong
const int row = info.y();
int column = info.x();
int colSpan = info.width();
int rowSpan = info.height();
// If not empty: A multiselection was dropped on an empty item, insert row
// and spread items along new row
if (!removeEmptyCellsOnGrid(gridLayout, info)) {
int freeColumn = -1;
colSpan = rowSpan = 1;
// First look to the right for a free column
const int columnCount = gridLayout->columnCount();
for (int c = column; c < columnCount; c++) {
const int idx = findGridItemAt(gridLayout, row, c);
if (idx != -1 && LayoutInfo::isEmptyItem(gridLayout->itemAt(idx))) {
freeColumn = c;
break;
}
}
if (freeColumn != -1) {
removeEmptyCellsOnGrid(gridLayout, QRect(freeColumn, row, 1, 1));
column = freeColumn;
} else {
GridLayoutHelper::insertRow(gridLayout, row);
column = 0;
}
}
gridLayout->addWidget(w, row , column, rowSpan, colSpan);
}
void GridLayoutHelper::removeWidget(QLayout *lt, QWidget *widget)
{
QGridLayout *gridLayout = qobject_cast<QGridLayout *>(lt);
Q_ASSERT(gridLayout);
const int index = gridLayout->indexOf(widget);
if (index == -1) {
qWarning() << "GridLayoutHelper::removeWidget : Attempt to remove " << widget << " which is not in the layout.";
return;
}
// delete old item and pad with by spacer items
int row, column, rowspan, colspan;
gridLayout->getItemPosition(index, &row, &column, &rowspan, &colspan);
delete gridLayout->takeAt(index);
const int rightColumn = column + colspan;
const int bottomRow = row + rowspan;
for (int c = column; c < rightColumn; c++)
for (int r = row; r < bottomRow; r++)
gridLayout->addItem(createGridSpacer(), r, c);
}
void GridLayoutHelper::replaceWidget(QLayout *lt, QWidget *before, QWidget *after)
{
bool ok = false;
QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem.
if (QGridLayout *gridLayout = qobject_cast<QGridLayout *>(lt)) {
const int index = gridLayout->indexOf(before);
if (index != -1) {
int row, column, rowSpan, columnSpan;
gridLayout->getItemPosition (index, &row, &column, &rowSpan, &columnSpan);
const bool visible = before->isVisible();
delete gridLayout->takeAt(index);
if (visible)
before->hide();
before->setParent(0);
gridLayout->addWidget(after, row, column, rowSpan, columnSpan);
ok = true;
}
}
if (!ok)
qWarning() << "GridLayoutHelper::replaceWidget : Unable to replace " << before << " by " << after << " in " << lt;
}
void GridLayoutHelper::pushState(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout)
{
QGridLayout *gridLayout = qobject_cast<QGridLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout));
Q_ASSERT(gridLayout);
GridLayoutState gs;
gs.fromLayout(gridLayout);
m_states.push(gs);
}
void GridLayoutHelper::popState(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout)
{
Q_ASSERT(!m_states.empty());
const GridLayoutState state = m_states.pop();
state.applyToLayout(core, widgetWithManagedLayout);
}
bool GridLayoutHelper::canSimplify(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout, const QRect &restrictionArea) const
{
QGridLayout *gridLayout = qobject_cast<QGridLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout));
Q_ASSERT(gridLayout);
GridLayoutState gs;
gs.fromLayout(gridLayout);
return gs.simplify(restrictionArea, true);
}
void GridLayoutHelper::simplify(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout, const QRect &restrictionArea)
{
QGridLayout *gridLayout = qobject_cast<QGridLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout));
Q_ASSERT(gridLayout);
if (debugLayout)
qDebug() << ">GridLayoutHelper::simplify" << *gridLayout;
GridLayoutState gs;
gs.fromLayout(gridLayout);
if (gs.simplify(restrictionArea, false))
gs.applyToLayout(core, widgetWithManagedLayout);
if (debugLayout)
qDebug() << "<GridLayoutHelper::simplify" << *gridLayout;
}
// ---------------- FormLayoutHelper
class FormLayoutHelper : public LayoutHelper {
public:
typedef QPair<QWidget *, QWidget *> WidgetPair;
typedef QVector<WidgetPair> FormLayoutState;
FormLayoutHelper() {}
virtual QRect itemInfo(QLayout *lt, int index) const;
virtual void insertWidget(QLayout *lt, const QRect &info, QWidget *w);
virtual void removeWidget(QLayout *lt, QWidget *widget);
virtual void replaceWidget(QLayout *lt, QWidget *before, QWidget *after);
virtual void pushState(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout);
virtual void popState(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout);
virtual bool canSimplify(const QDesignerFormEditorInterface *core, const QWidget *, const QRect &) const;
virtual void simplify(const QDesignerFormEditorInterface *, QWidget *, const QRect &);
private:
static FormLayoutState state(const QFormLayout *lt);
QStack<FormLayoutState> m_states;
};
QRect FormLayoutHelper::itemInfo(QLayout * lt, int index) const
{
QFormLayout *form = qobject_cast<QFormLayout *>(lt);
Q_ASSERT(form);
int row, column, colspan;
getFormLayoutItemPosition(form, index, &row, &column, 0, &colspan);
return QRect(column, row, colspan, 1);
}
void FormLayoutHelper::insertWidget(QLayout *lt, const QRect &info, QWidget *w)
{
if (debugLayout)
qDebug() << "FormLayoutHelper::insertWidget:" << w << info;
QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem.
QFormLayout *formLayout = qobject_cast<QFormLayout *>(lt);
Q_ASSERT(formLayout);
// check if there are any nonspacer items? (Drop on 3rd column or drop of a multiselection
// on an empty item. As the Form layout does not have insert semantics; we need to manually insert a row
const bool insert = !removeEmptyCellsOnGrid(formLayout, info);
formLayoutAddWidget(formLayout, w, info, insert);
QLayoutSupport::createEmptyCells(formLayout);
}
void FormLayoutHelper::removeWidget(QLayout *lt, QWidget *widget)
{
QFormLayout *formLayout = qobject_cast<QFormLayout *>(lt);
Q_ASSERT(formLayout);
const int index = formLayout->indexOf(widget);
if (index == -1) {
qWarning() << "FormLayoutHelper::removeWidget : Attempt to remove " << widget << " which is not in the layout.";
return;
}
// delete old item and pad with by spacer items
int row, column, colspan;
getFormLayoutItemPosition(formLayout, index, &row, &column, 0, &colspan);
if (debugLayout)
qDebug() << "FormLayoutHelper::removeWidget: #" << index << widget << " at " << row << column << colspan;
delete formLayout->takeAt(index);
if (colspan > 1 || column == 0)
formLayout->setItem(row, QFormLayout::LabelRole, createFormSpacer());
if (colspan > 1 || column == 1)
formLayout->setItem(row, QFormLayout::FieldRole, createFormSpacer());
}
void FormLayoutHelper::replaceWidget(QLayout *lt, QWidget *before, QWidget *after)
{
bool ok = false;
QDesignerWidgetItemInstaller wii; // Make sure we use QDesignerWidgetItem.
if (QFormLayout *formLayout = qobject_cast<QFormLayout *>(lt)) {
const int index = formLayout->indexOf(before);
if (index != -1) {
int row;
QFormLayout::ItemRole role;
formLayout->getItemPosition (index, &row, &role);
const bool visible = before->isVisible();
delete formLayout->takeAt(index);
if (visible)
before->hide();
before->setParent(0);
formLayout->setWidget(row, role, after);
ok = true;
}
}
if (!ok)
qWarning() << "FormLayoutHelper::replaceWidget : Unable to replace " << before << " by " << after << " in " << lt;
}
FormLayoutHelper::FormLayoutState FormLayoutHelper::state(const QFormLayout *lt)
{
const int rowCount = lt->rowCount();
if (rowCount == 0)
return FormLayoutState();
FormLayoutState rc(rowCount, WidgetPair(0, 0));
const int count = lt->count();
int row, column, colspan;
for (int i = 0; i < count; i++) {
QLayoutItem *item = lt->itemAt(i);
if (!LayoutInfo::isEmptyItem(item)) {
QWidget *w = item->widget();
Q_ASSERT(w);
getFormLayoutItemPosition(lt, i, &row, &column, 0, &colspan);
if (colspan > 1 || column == 0)
rc[row].first = w;
if (colspan > 1 || column == 1)
rc[row].second = w;
}
}
if (debugLayout) {
qDebug() << "FormLayoutHelper::state: " << rowCount;
for (int r = 0; r < rowCount; r++)
qDebug() << " Row: " << r << rc[r].first << rc[r].second;
}
return rc;
}
void FormLayoutHelper::pushState(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout)
{
QFormLayout *formLayout = qobject_cast<QFormLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout));
Q_ASSERT(formLayout);
m_states.push(state(formLayout));
}
void FormLayoutHelper::popState(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout)
{
QFormLayout *formLayout = qobject_cast<QFormLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout));
Q_ASSERT(!m_states.empty() && formLayout);
const FormLayoutState storedState = m_states.pop();
const FormLayoutState currentState = state(formLayout);
if (currentState == storedState)
return;
const int rowCount = storedState.size();
// clear out, shrink if required, but maintain items via map, pad spacers
const BoxLayoutHelper::LayoutItemVector items = BoxLayoutHelper::disassembleLayout(formLayout);
if (rowCount < formLayout->rowCount())
formLayout = static_cast<QFormLayout*>(recreateManagedLayout(core, widgetWithManagedLayout, formLayout ));
for (int r = 0; r < rowCount; r++) {
QWidget *widgets[FormLayoutColumns] = { storedState[r].first, storedState[r].second };
const bool spanning = widgets[0] != 0 && widgets[0] == widgets[1];
if (spanning) {
formLayout->setWidget(r, QFormLayout::SpanningRole, widgets[0]);
} else {
for (int c = 0; c < FormLayoutColumns; c++) {
const QFormLayout::ItemRole role = c == 0 ? QFormLayout::LabelRole : QFormLayout::FieldRole;
if (widgets[c] && BoxLayoutHelper::findItemOfWidget(items, widgets[c])) {
formLayout->setWidget(r, role, widgets[c]);
} else {
formLayout->setItem(r, role, createFormSpacer());
}
}
}
}
}
bool FormLayoutHelper::canSimplify(const QDesignerFormEditorInterface *core, const QWidget *widgetWithManagedLayout, const QRect &restrictionArea) const
{
const QFormLayout *formLayout = qobject_cast<QFormLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout));
Q_ASSERT(formLayout);
return canSimplifyFormLayout(formLayout, restrictionArea);
}
void FormLayoutHelper::simplify(const QDesignerFormEditorInterface *core, QWidget *widgetWithManagedLayout, const QRect &restrictionArea)
{
typedef QPair<QLayoutItem*, QLayoutItem*> LayoutItemPair;
typedef QVector<LayoutItemPair> LayoutItemPairs;
QFormLayout *formLayout = qobject_cast<QFormLayout *>(LayoutInfo::managedLayout(core, widgetWithManagedLayout));
Q_ASSERT(formLayout);
if (debugLayout)
qDebug() << "FormLayoutHelper::simplify";
// Transform into vector of item pairs
const int rowCount = formLayout->rowCount();
LayoutItemPairs pairs(rowCount, LayoutItemPair(0, 0));
for (int i = formLayout->count() - 1; i >= 0; i--) {
int row, col,colspan;
getFormLayoutItemPosition(formLayout, i, &row, &col, 0, &colspan);
if (colspan > 1) {
pairs[row].first = pairs[row].second = formLayout->takeAt(i);
} else {
if (col == 0)
pairs[row].first = formLayout->takeAt(i);
else
pairs[row].second = formLayout->takeAt(i);
}
}
// Weed out empty ones
const int bottomCheckRow = qMin(rowCount, restrictionArea.y() + restrictionArea.height());
for (int r = bottomCheckRow - 1; r >= restrictionArea.y(); r--)
if (LayoutInfo::isEmptyItem(pairs[r].first) && LayoutInfo::isEmptyItem(pairs[r].second)) {
delete pairs[r].first;
delete pairs[r].second;
pairs.remove(r);
}
const int simpleRowCount = pairs.size();
if (simpleRowCount < rowCount)
formLayout = static_cast<QFormLayout *>(recreateManagedLayout(core, widgetWithManagedLayout, formLayout));
// repopulate
for (int r = 0; r < simpleRowCount; r++) {
const bool spanning = pairs[r].first == pairs[r].second;
if (spanning) {
formLayout->setItem(r, QFormLayout::SpanningRole, pairs[r].first);
} else {
formLayout->setItem(r, QFormLayout::LabelRole, pairs[r].first);
formLayout->setItem(r, QFormLayout::FieldRole, pairs[r].second);
}
}
}
LayoutHelper *LayoutHelper::createLayoutHelper(int type)
{
LayoutHelper *rc = 0;
switch (type) {
case LayoutInfo::HBox:
rc = new BoxLayoutHelper(Qt::Horizontal);
break;
case LayoutInfo::VBox:
rc = new BoxLayoutHelper(Qt::Vertical);
break;
case LayoutInfo::Grid:
rc = new GridLayoutHelper;
break;
case LayoutInfo::Form:
return new FormLayoutHelper;
default:
break;
}
Q_ASSERT(rc);
return rc;
}
// ---- QLayoutSupport (LayoutDecorationExtension)
QLayoutSupport::QLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, LayoutHelper *helper, QObject *parent) :
QObject(parent),
m_formWindow(formWindow),
m_helper(helper),
m_widget(widget),
m_currentIndex(-1),
m_currentInsertMode(QDesignerLayoutDecorationExtension::InsertWidgetMode)
{
}
QLayout * QLayoutSupport::layout() const
{
return LayoutInfo::managedLayout(m_formWindow->core(), m_widget);
}
void QLayoutSupport::hideIndicator(Indicator i)
{
if (m_indicators[i])
m_indicators[i]->hide();
}
void QLayoutSupport::showIndicator(Indicator i, const QRect &geometry, const QPalette &p)
{
if (!m_indicators[i])
m_indicators[i] = new qdesigner_internal::InvisibleWidget(m_widget);
QWidget *indicator = m_indicators[i];
indicator->setAutoFillBackground(true);
indicator->setPalette(p);
indicator->setGeometry(geometry);
indicator->show();
indicator->raise();
}
QLayoutSupport::~QLayoutSupport()
{
delete m_helper;
for (int i = 0; i < NumIndicators; i++)
if (m_indicators[i])
m_indicators[i]->deleteLater();
}
QGridLayout * QLayoutSupport::gridLayout() const
{
return qobject_cast<QGridLayout*>(LayoutInfo::managedLayout(m_formWindow->core(), m_widget));
}
QRect QLayoutSupport::itemInfo(int index) const
{
return m_helper->itemInfo(LayoutInfo::managedLayout(m_formWindow->core(), m_widget), index);
}
void QLayoutSupport::setInsertMode(InsertMode im)
{
m_currentInsertMode = im;
}
void QLayoutSupport::setCurrentCell(const QPair<int, int> &cell)
{
m_currentCell = cell;
}
void QLayoutSupport::adjustIndicator(const QPoint &pos, int index)
{
if (index == -1) { // first item goes anywhere
hideIndicator(LeftIndicator);
hideIndicator(TopIndicator);
hideIndicator(RightIndicator);
hideIndicator(BottomIndicator);
return;
}
m_currentIndex = index;
m_currentInsertMode = QDesignerLayoutDecorationExtension::InsertWidgetMode;
QLayoutItem *item = layout()->itemAt(index);
const QRect g = extendedGeometry(index);
// ### cleanup
if (LayoutInfo::isEmptyItem(item)) {
// Empty grid/form cell. Draw a rectangle
QPalette redPalette;
redPalette.setColor(QPalette::Window, Qt::red);
showIndicator(LeftIndicator, QRect(g.x(), g.y(), indicatorSize, g.height()), redPalette);
showIndicator(TopIndicator, QRect(g.x(), g.y(), g.width(), indicatorSize), redPalette);
showIndicator(RightIndicator, QRect(g.right(), g.y(), indicatorSize, g.height()), redPalette);
showIndicator(BottomIndicator, QRect(g.x(), g.bottom(), g.width(), indicatorSize), redPalette);
setCurrentCellFromIndicatorOnEmptyCell(m_currentIndex);
} else {
// Append/Insert. Draw a bar left/right or above/below
QPalette bluePalette;
bluePalette.setColor(QPalette::Window, Qt::blue);
hideIndicator(LeftIndicator);
hideIndicator(TopIndicator);
const int fromRight = g.right() - pos.x();
const int fromBottom = g.bottom() - pos.y();
const int fromLeft = pos.x() - g.x();
const int fromTop = pos.y() - g.y();
const int fromLeftRight = qMin(fromRight, fromLeft );
const int fromBottomTop = qMin(fromBottom, fromTop);
const Qt::Orientation indicatorOrientation = fromLeftRight < fromBottomTop ? Qt::Vertical : Qt::Horizontal;
if (supportsIndicatorOrientation(indicatorOrientation)) {
const QRect r(layout()->geometry().topLeft(), layout()->parentWidget()->size());
switch (indicatorOrientation) {
case Qt::Vertical: {
hideIndicator(BottomIndicator);
const bool closeToLeft = fromLeftRight == fromLeft;
showIndicator(RightIndicator, QRect(closeToLeft ? g.x() : g.right() + 1 - indicatorSize, 0, indicatorSize, r.height()), bluePalette);
const int incr = closeToLeft ? 0 : +1;
setCurrentCellFromIndicator(indicatorOrientation, m_currentIndex, incr);
}
break;
case Qt::Horizontal: {
hideIndicator(RightIndicator);
const bool closeToTop = fromBottomTop == fromTop;
showIndicator(BottomIndicator, QRect(r.x(), closeToTop ? g.y() : g.bottom() + 1 - indicatorSize, r.width(), indicatorSize), bluePalette);
const int incr = closeToTop ? 0 : +1;
setCurrentCellFromIndicator(indicatorOrientation, m_currentIndex, incr);
}
break;
}
} else {
hideIndicator(RightIndicator);
hideIndicator(BottomIndicator);
} // can handle indicatorOrientation
}
}
int QLayoutSupport::indexOf(QLayoutItem *i) const
{
const QLayout *lt = layout();
if (!lt)
return -1;
int index = 0;
while (QLayoutItem *item = lt->itemAt(index)) {
if (item == i)
return index;
++index;
}
return -1;
}
int QLayoutSupport::indexOf(QWidget *widget) const
{
const QLayout *lt = layout();
if (!lt)
return -1;
int index = 0;
while (QLayoutItem *item = lt->itemAt(index)) {
if (item->widget() == widget)
return index;
++index;
}
return -1;
}
QList<QWidget*> QLayoutSupport::widgets(QLayout *layout) const
{
if (!layout)
return QList<QWidget*>();
QList<QWidget*> lst;
int index = 0;
while (QLayoutItem *item = layout->itemAt(index)) {
++index;
QWidget *widget = item->widget();
if (widget && formWindow()->isManaged(widget))
lst.append(widget);
}
return lst;
}
int QLayoutSupport::findItemAt(QGridLayout *gridLayout, int at_row, int at_column)
{
return findGridItemAt(gridLayout, at_row, at_column);
}
// Quick check whether simplify should be enabled for grids. May return false positives.
// Note: Calculating the occupied area does not work as spanning items may also be simplified.
bool QLayoutSupport::canSimplifyQuickCheck(const QGridLayout *gl)
{
if (!gl)
return false;
const int colCount = gl->columnCount();
const int rowCount = gl->rowCount();
if (colCount < 2 || rowCount < 2)
return false;
// try to find a spacer.
const int count = gl->count();
for (int index = 0; index < count; index++)
if (LayoutInfo::isEmptyItem(gl->itemAt(index)))
return true;
return false;
}
bool QLayoutSupport::canSimplifyQuickCheck(const QFormLayout *fl)
{
return canSimplifyFormLayout(fl, QRect(QPoint(0, 0), QSize(32767, 32767)));
}
// remove dummy spacers
bool QLayoutSupport::removeEmptyCells(QGridLayout *grid, const QRect &area)
{
return removeEmptyCellsOnGrid(grid, area);
}
void QLayoutSupport::createEmptyCells(QGridLayout *gridLayout)
{
Q_ASSERT(gridLayout);
GridLayoutState gs;
gs.fromLayout(gridLayout);
const GridLayoutState::CellStates cs = GridLayoutState::cellStates(gs.widgetItemMap.values(), gs.rowCount, gs.colCount);
for (int c = 0; c < gs.colCount; c++)
for (int r = 0; r < gs.rowCount; r++)
if (needsSpacerItem(cs[r * gs.colCount + c])) {
const int existingItemIndex = findItemAt(gridLayout, r, c);
if (existingItemIndex == -1)
gridLayout->addItem(createGridSpacer(), r, c);
}
}
bool QLayoutSupport::removeEmptyCells(QFormLayout *formLayout, const QRect &area)
{
return removeEmptyCellsOnGrid(formLayout, area);
}
void QLayoutSupport::createEmptyCells(QFormLayout *formLayout)
{
// No spanning items here..
if (const int rowCount = formLayout->rowCount())
for (int c = 0; c < FormLayoutColumns; c++)
for (int r = 0; r < rowCount; r++)
if (findGridItemAt(formLayout, r, c) == -1)
formLayout->setItem(r, c == 0 ? QFormLayout::LabelRole : QFormLayout::FieldRole, createFormSpacer());
}
int QLayoutSupport::findItemAt(const QPoint &pos) const
{
if (!layout())
return -1;
const QLayout *lt = layout();
const int count = lt->count();
if (count == 0)
return -1;
int best = -1;
int bestIndex = -1;
for (int index = 0; index < count; index++) {
QLayoutItem *item = lt->itemAt(index);
bool visible = true;
// When dragging widgets within layout, the source widget is invisible and must not be hit
if (const QWidget *w = item->widget())
visible = w->isVisible();
if (visible) {
const QRect g = item->geometry();
const int dist = (g.center() - pos).manhattanLength();
if (best == -1 || dist < best) {
best = dist;
bestIndex = index;
}
}
}
return bestIndex;
}
// ------------ QBoxLayoutSupport (LayoutDecorationExtension)
namespace {
class QBoxLayoutSupport: public QLayoutSupport
{
public:
QBoxLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, Qt::Orientation orientation, QObject *parent = 0);
virtual void insertWidget(QWidget *widget, const QPair<int, int> &cell);
virtual void removeWidget(QWidget *widget);
virtual void simplify() {}
virtual void insertRow(int /*row*/) {}
virtual void insertColumn(int /*column*/) {}
virtual int findItemAt(int /*at_row*/, int /*at_column*/) const { return -1; }
private:
virtual void setCurrentCellFromIndicatorOnEmptyCell(int index);
virtual void setCurrentCellFromIndicator(Qt::Orientation indicatorOrientation, int index, int increment);
virtual bool supportsIndicatorOrientation(Qt::Orientation indicatorOrientation) const;
virtual QRect extendedGeometry(int index) const;
const Qt::Orientation m_orientation;
};
void QBoxLayoutSupport::removeWidget(QWidget *widget)
{
QLayout *lt = layout();
const int index = lt->indexOf(widget);
// Adjust the current cell in case a widget was dragged within the same layout to a position
// of higher index, which happens as follows:
// Drag start: The widget is hidden
// Drop: Current cell is stored, widget is removed and re-added, causing an index offset that needs to be compensated
QPair<int, int> currCell = currentCell();
switch (m_orientation) {
case Qt::Horizontal:
if (currCell.second > 0 && index < currCell.second ) {
currCell.second--;
setCurrentCell(currCell);
}
break;
case Qt::Vertical:
if (currCell.first > 0 && index < currCell.first) {
currCell.first--;
setCurrentCell(currCell);
}
break;
}
helper()->removeWidget(lt, widget);
}
QBoxLayoutSupport::QBoxLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, Qt::Orientation orientation, QObject *parent) :
QLayoutSupport(formWindow, widget, new BoxLayoutHelper(orientation), parent),
m_orientation(orientation)
{
}
void QBoxLayoutSupport::setCurrentCellFromIndicatorOnEmptyCell(int index)
{
qDebug() << "QBoxLayoutSupport::setCurrentCellFromIndicatorOnEmptyCell(): Warning: found a fake spacer inside a vbox layout at " << index;
setCurrentCell(qMakePair(0, 0));
}
void QBoxLayoutSupport::insertWidget(QWidget *widget, const QPair<int, int> &cell)
{
switch (m_orientation) {
case Qt::Horizontal:
helper()->insertWidget(layout(), QRect(cell.second, 0, 1, 1), widget);
break;
case Qt::Vertical:
helper()->insertWidget(layout(), QRect(0, cell.first, 1, 1), widget);
break;
}
}
void QBoxLayoutSupport::setCurrentCellFromIndicator(Qt::Orientation indicatorOrientation, int index, int increment)
{
if (m_orientation == Qt::Horizontal && indicatorOrientation == Qt::Vertical) {
setCurrentCell(qMakePair(0, index + increment));
} else if (m_orientation == Qt::Vertical && indicatorOrientation == Qt::Horizontal) {
setCurrentCell(qMakePair(index + increment, 0));
}
}
bool QBoxLayoutSupport::supportsIndicatorOrientation(Qt::Orientation indicatorOrientation) const
{
return m_orientation != indicatorOrientation;
}
QRect QBoxLayoutSupport::extendedGeometry(int index) const
{
QLayoutItem *item = layout()->itemAt(index);
// start off with item geometry
QRect g = item->geometry();
const QRect info = itemInfo(index);
// On left border: extend to widget border
if (info.x() == 0) {
QPoint topLeft = g.topLeft();
topLeft.rx() = layout()->geometry().left();
g.setTopLeft(topLeft);
}
// On top border: extend to widget border
if (info.y() == 0) {
QPoint topLeft = g.topLeft();
topLeft.ry() = layout()->geometry().top();
g.setTopLeft(topLeft);
}
// is this the last item?
const QBoxLayout *box = static_cast<const QBoxLayout*>(layout());
if (index < box->count() -1)
return g; // Nope.
// extend to widget border
QPoint bottomRight = g.bottomRight();
switch (m_orientation) {
case Qt::Vertical:
bottomRight.ry() = layout()->geometry().bottom();
break;
case Qt::Horizontal:
bottomRight.rx() = layout()->geometry().right();
break;
}
g.setBottomRight(bottomRight);
return g;
}
// -------------- Base class for QGridLayout-like support classes (LayoutDecorationExtension)
template <class GridLikeLayout>
class GridLikeLayoutSupportBase: public QLayoutSupport
{
public:
GridLikeLayoutSupportBase(QDesignerFormWindowInterface *formWindow, QWidget *widget, LayoutHelper *helper, QObject *parent = 0) :
QLayoutSupport(formWindow, widget, helper, parent) {}
void insertWidget(QWidget *widget, const QPair<int, int> &cell);
virtual void removeWidget(QWidget *widget) { helper()->removeWidget(layout(), widget); }
virtual int findItemAt(int row, int column) const;
protected:
GridLikeLayout *gridLikeLayout() const {
return qobject_cast<GridLikeLayout*>(LayoutInfo::managedLayout(formWindow()->core(), widget()));
}
private:
virtual void setCurrentCellFromIndicatorOnEmptyCell(int index);
virtual void setCurrentCellFromIndicator(Qt::Orientation indicatorOrientation, int index, int increment);
virtual bool supportsIndicatorOrientation(Qt::Orientation) const { return true; }
virtual QRect extendedGeometry(int index) const;
// Overwrite to check the insertion position (if there are limits)
virtual void checkCellForInsertion(int * /*row*/, int * /*col*/) const {}
};
template <class GridLikeLayout>
void GridLikeLayoutSupportBase<GridLikeLayout>::setCurrentCellFromIndicatorOnEmptyCell(int index)
{
GridLikeLayout *grid = gridLikeLayout();
Q_ASSERT(grid);
setInsertMode(InsertWidgetMode);
int row, column, rowspan, colspan;
getGridItemPosition(grid, index, &row, &column, &rowspan, &colspan);
setCurrentCell(qMakePair(row, column));
}
template <class GridLikeLayout>
void GridLikeLayoutSupportBase<GridLikeLayout>::setCurrentCellFromIndicator(Qt::Orientation indicatorOrientation, int index, int increment) {
const QRect info = itemInfo(index);
switch (indicatorOrientation) {
case Qt::Vertical: {
setInsertMode(InsertColumnMode);
int row = info.top();
int column = increment ? info.right() + 1 : info.left();
checkCellForInsertion(&row, &column);
setCurrentCell(qMakePair(row , column));
}
break;
case Qt::Horizontal: {
setInsertMode(InsertRowMode);
int row = increment ? info.bottom() + 1 : info.top();
int column = info.left();
checkCellForInsertion(&row, &column);
setCurrentCell(qMakePair(row, column));
}
break;
}
}
template <class GridLikeLayout>
void GridLikeLayoutSupportBase<GridLikeLayout>::insertWidget(QWidget *widget, const QPair<int, int> &cell)
{
helper()->insertWidget(layout(), QRect(cell.second, cell.first, 1, 1), widget);
}
template <class GridLikeLayout>
int GridLikeLayoutSupportBase<GridLikeLayout>::findItemAt(int at_row, int at_column) const
{
GridLikeLayout *grid = gridLikeLayout();
Q_ASSERT(grid);
return findGridItemAt(grid, at_row, at_column);
}
template <class GridLikeLayout>
QRect GridLikeLayoutSupportBase<GridLikeLayout>::extendedGeometry(int index) const
{
QLayoutItem *item = layout()->itemAt(index);
// start off with item geometry
QRect g = item->geometry();
const QRect info = itemInfo(index);
// On left border: extend to widget border
if (info.x() == 0) {
QPoint topLeft = g.topLeft();
topLeft.rx() = layout()->geometry().left();
g.setTopLeft(topLeft);
}
// On top border: extend to widget border
if (info.y() == 0) {
QPoint topLeft = g.topLeft();
topLeft.ry() = layout()->geometry().top();
g.setTopLeft(topLeft);
}
const GridLikeLayout *grid = gridLikeLayout();
Q_ASSERT(grid);
// extend to widget border
QPoint bottomRight = g.bottomRight();
if (gridRowCount(grid) == info.y())
bottomRight.ry() = layout()->geometry().bottom();
if (gridColumnCount(grid) == info.x())
bottomRight.rx() = layout()->geometry().right();
g.setBottomRight(bottomRight);
return g;
}
// -------------- QGridLayoutSupport (LayoutDecorationExtension)
class QGridLayoutSupport: public GridLikeLayoutSupportBase<QGridLayout>
{
public:
QGridLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent = 0);
virtual void simplify();
virtual void insertRow(int row);
virtual void insertColumn(int column);
private:
};
QGridLayoutSupport::QGridLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent) :
GridLikeLayoutSupportBase<QGridLayout>(formWindow, widget, new GridLayoutHelper, parent)
{
}
void QGridLayoutSupport::insertRow(int row)
{
QGridLayout *grid = gridLayout();
Q_ASSERT(grid);
GridLayoutHelper::insertRow(grid, row);
}
void QGridLayoutSupport::insertColumn(int column)
{
QGridLayout *grid = gridLayout();
Q_ASSERT(grid);
GridLayoutState state;
state.fromLayout(grid);
state.insertColumn(column);
state.applyToLayout(formWindow()->core(), widget());
}
void QGridLayoutSupport::simplify()
{
QGridLayout *grid = gridLayout();
Q_ASSERT(grid);
GridLayoutState state;
state.fromLayout(grid);
const QRect fullArea = QRect(0, 0, state.colCount, state.rowCount);
if (state.simplify(fullArea, false))
state.applyToLayout(formWindow()->core(), widget());
}
// -------------- QFormLayoutSupport (LayoutDecorationExtension)
class QFormLayoutSupport: public GridLikeLayoutSupportBase<QFormLayout>
{
public:
QFormLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent = 0);
virtual void simplify() {}
virtual void insertRow(int /*row*/) {}
virtual void insertColumn(int /*column*/) {}
private:
virtual void checkCellForInsertion(int * row, int *col) const;
};
QFormLayoutSupport::QFormLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent) :
GridLikeLayoutSupportBase<QFormLayout>(formWindow, widget, new FormLayoutHelper, parent)
{
}
void QFormLayoutSupport::checkCellForInsertion(int *row, int *col) const
{
if (*col >= FormLayoutColumns) { // Clamp to 2 columns
*col = 1;
(*row)++;
}
}
} // anonymous namespace
QLayoutSupport *QLayoutSupport::createLayoutSupport(QDesignerFormWindowInterface *formWindow, QWidget *widget, QObject *parent)
{
const QLayout *layout = LayoutInfo::managedLayout(formWindow->core(), widget);
Q_ASSERT(layout);
QLayoutSupport *rc = 0;
switch (LayoutInfo::layoutType(formWindow->core(), layout)) {
case LayoutInfo::HBox:
rc = new QBoxLayoutSupport(formWindow, widget, Qt::Horizontal, parent);
break;
case LayoutInfo::VBox:
rc = new QBoxLayoutSupport(formWindow, widget, Qt::Vertical, parent);
break;
case LayoutInfo::Grid:
rc = new QGridLayoutSupport(formWindow, widget, parent);
break;
case LayoutInfo::Form:
rc = new QFormLayoutSupport(formWindow, widget, parent);
break;
default:
break;
}
Q_ASSERT(rc);
return rc;
}
} // namespace qdesigner_internal
// -------------- QLayoutWidget
QLayoutWidget::QLayoutWidget(QDesignerFormWindowInterface *formWindow, QWidget *parent)
: QWidget(parent), m_formWindow(formWindow),
m_leftMargin(0), m_topMargin(0), m_rightMargin(0), m_bottomMargin(0)
{
}
void QLayoutWidget::paintEvent(QPaintEvent*)
{
if (m_formWindow->currentTool() != 0)
return;
// only draw red borders if we're editting widgets
QPainter p(this);
QMap<int, QMap<int, bool> > excludedRowsForColumn;
QMap<int, QMap<int, bool> > excludedColumnsForRow;
QLayout *lt = layout();
QGridLayout *grid = qobject_cast<QGridLayout *>(lt);
if (lt) {
if (const int count = lt->count()) {
p.setPen(QPen(QColor(255, 0, 0, 35), 1));
for (int i = 0; i < count; i++) {
QLayoutItem *item = lt->itemAt(i);
if (grid) {
int row, column, rowSpan, columnSpan;
grid->getItemPosition(i, &row, &column, &rowSpan, &columnSpan);
QMap<int, bool> rows;
QMap<int, bool> columns;
for (int i = rowSpan; i > 1; i--)
rows[row + i - 2] = true;
for (int i = columnSpan; i > 1; i--)
columns[column + i - 2] = true;
while (rowSpan > 0) {
excludedColumnsForRow[row + rowSpan - 1].unite(columns);
rowSpan--;
}
while (columnSpan > 0) {
excludedRowsForColumn[column + columnSpan - 1].unite(rows);
columnSpan--;
}
}
if (item->spacerItem()) {
const QRect geometry = item->geometry();
if (!geometry.isNull())
p.drawRect(geometry.adjusted(1, 1, -2, -2));
}
}
}
}
if (grid) {
p.setPen(QPen(QColor(0, 0x80, 0, 0x80), 1));
const int rowCount = grid->rowCount();
const int columnCount = grid->columnCount();
for (int i = 0; i < rowCount; i++) {
for (int j = 0; j < columnCount; j++) {
const QRect cellRect = grid->cellRect(i, j);
if (j < columnCount - 1 && excludedColumnsForRow.value(i).value(j, false) == false) {
const double y0 = (i == 0)
? 0 : (grid->cellRect(i - 1, j).bottom() + cellRect.top()) / 2.0;
const double y1 = (i == rowCount - 1)
? height() - 1 : (cellRect.bottom() + grid->cellRect(i + 1, j).top()) / 2.0;
const double x = (cellRect.right() + grid->cellRect(i, j + 1).left()) / 2.0;
p.drawLine(QPointF(x, y0), QPointF(x, y1));
}
if (i < rowCount - 1 && excludedRowsForColumn.value(j).value(i, false) == false) {
const double x0 = (j == 0)
? 0 : (grid->cellRect(i, j - 1).right() + cellRect.left()) / 2.0;
const double x1 = (j == columnCount - 1)
? width() - 1 : (cellRect.right() + grid->cellRect(i, j + 1).left()) / 2.0;
const double y = (cellRect.bottom() + grid->cellRect(i + 1, j).top()) / 2.0;
p.drawLine(QPointF(x0, y), QPointF(x1, y));
}
}
}
}
p.setPen(QPen(QColor(255, 0, 0, 128), 1));
p.drawRect(0, 0, width() - 1, height() - 1);
}
bool QLayoutWidget::event(QEvent *e)
{
switch (e->type()) {
case QEvent::LayoutRequest: {
(void) QWidget::event(e);
// Magic: We are layouted, but the parent is not..
if (layout() && qdesigner_internal::LayoutInfo::layoutType(formWindow()->core(), parentWidget()) == qdesigner_internal::LayoutInfo::NoLayout) {
resize(layout()->totalMinimumSize().expandedTo(size()));
}
update();
return true;
}
default:
break;
}
return QWidget::event(e);
}
int QLayoutWidget::layoutLeftMargin() const
{
if (m_leftMargin < 0 && layout()) {
int margin;
layout()->getContentsMargins(&margin, 0, 0, 0);
return margin;
}
return m_leftMargin;
}
void QLayoutWidget::setLayoutLeftMargin(int layoutMargin)
{
m_leftMargin = layoutMargin;
if (layout()) {
int newMargin = m_leftMargin;
if (newMargin >= 0 && newMargin < ShiftValue)
newMargin = ShiftValue;
int left, top, right, bottom;
layout()->getContentsMargins(&left, &top, &right, &bottom);
layout()->setContentsMargins(newMargin, top, right, bottom);
}
}
int QLayoutWidget::layoutTopMargin() const
{
if (m_topMargin < 0 && layout()) {
int margin;
layout()->getContentsMargins(0, &margin, 0, 0);
return margin;
}
return m_topMargin;
}
void QLayoutWidget::setLayoutTopMargin(int layoutMargin)
{
m_topMargin = layoutMargin;
if (layout()) {
int newMargin = m_topMargin;
if (newMargin >= 0 && newMargin < ShiftValue)
newMargin = ShiftValue;
int left, top, right, bottom;
layout()->getContentsMargins(&left, &top, &right, &bottom);
layout()->setContentsMargins(left, newMargin, right, bottom);
}
}
int QLayoutWidget::layoutRightMargin() const
{
if (m_rightMargin < 0 && layout()) {
int margin;
layout()->getContentsMargins(0, 0, &margin, 0);
return margin;
}
return m_rightMargin;
}
void QLayoutWidget::setLayoutRightMargin(int layoutMargin)
{
m_rightMargin = layoutMargin;
if (layout()) {
int newMargin = m_rightMargin;
if (newMargin >= 0 && newMargin < ShiftValue)
newMargin = ShiftValue;
int left, top, right, bottom;
layout()->getContentsMargins(&left, &top, &right, &bottom);
layout()->setContentsMargins(left, top, newMargin, bottom);
}
}
int QLayoutWidget::layoutBottomMargin() const
{
if (m_bottomMargin < 0 && layout()) {
int margin;
layout()->getContentsMargins(0, 0, 0, &margin);
return margin;
}
return m_bottomMargin;
}
void QLayoutWidget::setLayoutBottomMargin(int layoutMargin)
{
m_bottomMargin = layoutMargin;
if (layout()) {
int newMargin = m_bottomMargin;
if (newMargin >= 0 && newMargin < ShiftValue)
newMargin = ShiftValue;
int left, top, right, bottom;
layout()->getContentsMargins(&left, &top, &right, &bottom);
layout()->setContentsMargins(left, top, right, newMargin);
}
}
QT_END_NAMESPACE