| /* |
| * Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.awt.X11; |
| |
| import java.awt.*; |
| import java.awt.event.*; |
| import java.awt.image.BufferedImage; |
| import sun.awt.SunToolkit; |
| import sun.awt.X11GraphicsConfig; |
| import sun.util.logging.PlatformLogger; |
| |
| /** |
| * A simple vertical scroll bar. |
| */ |
| abstract class XScrollbar { |
| |
| private static PlatformLogger log = PlatformLogger.getLogger("sun.awt.X11.XScrollbar"); |
| /** |
| * The thread that asynchronously tells the scrollbar to scroll. |
| * @see #startScrolling |
| */ |
| private static XScrollRepeater scroller = new XScrollRepeater(null); |
| /* |
| * The repeater that used for concurrent scrolling of the vertical and horizontal scrollbar |
| * And so there is not static keyword |
| * See 6243382 for more information |
| */ |
| private XScrollRepeater i_scroller = new XScrollRepeater(null); |
| |
| // Thumb length is always >= MIN_THUMB_H |
| private final static int MIN_THUMB_H = 5; |
| |
| private static final int ARROW_IND = 1; |
| |
| XScrollbarClient sb; |
| |
| //Use set methods to set scrollbar parameters |
| private int val; |
| private int min; |
| private int max; |
| private int vis; |
| |
| private int line; |
| private int page; |
| private boolean needsRepaint = true; |
| private boolean pressed = false; |
| private boolean dragging = false; |
| |
| Polygon firstArrow, secondArrow; |
| |
| int width, height; // Dimensions of the visible part of the parent window |
| int barWidth, barLength; // Rotation-independent values, |
| // equal to (width, height) for vertical, |
| // rotated by 90 for horizontal. |
| // That is, barLength is always the length between |
| // the tips of the arrows. |
| int arrowArea; // The area reserved for the scroll arrows |
| int alignment; |
| public static final int ALIGNMENT_VERTICAL = 1, ALIGNMENT_HORIZONTAL = 2; |
| |
| int mode; |
| Point thumbOffset; |
| private Rectangle prevThumb; |
| |
| public XScrollbar(int alignment, XScrollbarClient sb) { |
| this.sb = sb; |
| this.alignment = alignment; |
| } |
| |
| public boolean needsRepaint() { |
| return needsRepaint; |
| } |
| |
| void notifyValue(int v) { |
| notifyValue(v, false); |
| } |
| |
| void notifyValue(int v, final boolean isAdjusting) { |
| if (v < min) { |
| v = min; |
| } else if (v > max - vis) { |
| v = max - vis; |
| } |
| final int value = v; |
| final int mode = this.mode; |
| if ((sb != null) && ((value != val)||(!pressed))) { |
| SunToolkit.executeOnEventHandlerThread(sb.getEventSource(), new Runnable() { |
| public void run() { |
| sb.notifyValue(XScrollbar.this, mode, value, isAdjusting); |
| } |
| }); |
| } |
| } |
| |
| abstract protected void rebuildArrows(); |
| |
| public void setSize(int width, int height) { |
| if (log.isLoggable(PlatformLogger.FINER)) log.finer("Setting scroll bar " + this + " size to " + width + "x" + height); |
| this.width = width; |
| this.height = height; |
| } |
| |
| /** |
| * Creates oriented directed arrow |
| */ |
| protected Polygon createArrowShape(boolean vertical, boolean up) { |
| Polygon arrow = new Polygon(); |
| // TODO: this should be done polymorphically in subclasses |
| // FIXME: arrows overlap the thumb for very wide scrollbars |
| if (vertical) { |
| int x = width / 2 - getArrowWidth()/2; |
| int y1 = (up ? ARROW_IND : barLength - ARROW_IND); |
| int y2 = (up ? getArrowWidth() : barLength - getArrowWidth() - ARROW_IND); |
| arrow.addPoint(x + getArrowWidth()/2, y1); |
| arrow.addPoint(x + getArrowWidth(), y2); |
| arrow.addPoint(x, y2); |
| arrow.addPoint(x + getArrowWidth()/2, y1); |
| } else { |
| int y = height / 2 - getArrowWidth()/2; |
| int x1 = (up ? ARROW_IND : barLength - ARROW_IND); |
| int x2 = (up ? getArrowWidth() : barLength - getArrowWidth() - ARROW_IND); |
| arrow.addPoint(x1, y + getArrowWidth()/2); |
| arrow.addPoint(x2, y + getArrowWidth()); |
| arrow.addPoint(x2, y); |
| arrow.addPoint(x1, y + getArrowWidth()/2); |
| } |
| return arrow; |
| } |
| |
| /** |
| * Gets the area of the scroll track |
| */ |
| protected abstract Rectangle getThumbArea(); |
| |
| /** |
| * paint the scrollbar |
| * @param g the graphics context to paint into |
| * @param colors the colors to use when painting the scrollbar |
| * @param width the width of the scrollbar |
| * @param height the height of the scrollbar |
| * @param paintAll paint the whole scrollbar if true, just the thumb is false |
| */ |
| void paint(Graphics g, Color colors[], boolean paintAll) { |
| if (log.isLoggable(PlatformLogger.FINER)) log.finer("Painting scrollbar " + this); |
| |
| boolean useBufferedImage = false; |
| Graphics2D g2 = null; |
| BufferedImage buffer = null; |
| if (!(g instanceof Graphics2D)) { |
| // Fix for 5045936, 5055171. While printing, g is an instance |
| // of sun.print.ProxyPrintGraphics which extends Graphics. |
| // So we use a separate buffered image and its graphics is |
| // always Graphics2D instance |
| X11GraphicsConfig graphicsConfig = (X11GraphicsConfig)(sb.getEventSource().getGraphicsConfiguration()); |
| buffer = graphicsConfig.createCompatibleImage(width, height); |
| g2 = buffer.createGraphics(); |
| useBufferedImage = true; |
| } else { |
| g2 = (Graphics2D)g; |
| } |
| try { |
| Rectangle thumbRect = calculateThumbRect(); |
| |
| // if (prevH == thumbH && prevY == thumbPosY) { |
| // return; |
| // } |
| |
| prevThumb = thumbRect; |
| |
| // TODO: Share Motif colors |
| Color back = colors[XComponentPeer.BACKGROUND_COLOR]; |
| Color selectColor = new Color(MotifColorUtilities.calculateSelectFromBackground(back.getRed(),back.getGreen(),back.getBlue())); |
| Color darkShadow = new Color(MotifColorUtilities.calculateBottomShadowFromBackground(back.getRed(),back.getGreen(),back.getBlue())); |
| Color lightShadow = new Color(MotifColorUtilities.calculateTopShadowFromBackground(back.getRed(),back.getGreen(),back.getBlue())); |
| |
| XToolkit.awtLock(); |
| try { |
| XlibWrapper.XFlush(XToolkit.getDisplay()); |
| } finally { |
| XToolkit.awtUnlock(); |
| } |
| /* paint the background slightly darker */ |
| if (paintAll) { |
| // fill the entire background |
| g2.setColor(selectColor); |
| if (alignment == ALIGNMENT_HORIZONTAL) { |
| g2.fillRect(0, 0, thumbRect.x, height); |
| g2.fillRect(thumbRect.x + thumbRect.width , 0, width - (thumbRect.x + thumbRect.width), height); |
| } else { |
| g2.fillRect(0, 0, width, thumbRect.y); |
| g2.fillRect(0, thumbRect.y + thumbRect.height, width, height - (thumbRect.y + thumbRect.height)); |
| } |
| |
| // Paint edges |
| // TODO: Share Motif 3d rect drawing |
| |
| g2.setColor(darkShadow); |
| g2.drawLine(0, 0, width-1, 0); // top |
| g2.drawLine(0, 0, 0, height-1); // left |
| |
| g2.setColor(lightShadow); |
| g2.drawLine(1, height-1, width-1, height-1); // bottom |
| g2.drawLine(width-1, 1, width-1, height-1); // right |
| } else { |
| // Clear all thumb area |
| g2.setColor(selectColor); |
| Rectangle thumbArea = getThumbArea(); |
| g2.fill(thumbArea); |
| } |
| |
| if (paintAll) { |
| // ************ paint the arrows |
| paintArrows(g2, colors[XComponentPeer.BACKGROUND_COLOR], darkShadow, lightShadow ); |
| |
| } |
| |
| // Thumb |
| g2.setColor(colors[XComponentPeer.BACKGROUND_COLOR]); |
| g2.fillRect(thumbRect.x, thumbRect.y, thumbRect.width, thumbRect.height); |
| |
| g2.setColor(lightShadow); |
| g2.drawLine(thumbRect.x, thumbRect.y, |
| thumbRect.x + thumbRect.width, thumbRect.y); // top |
| g2.drawLine(thumbRect.x, thumbRect.y, |
| thumbRect.x, thumbRect.y+thumbRect.height); // left |
| |
| g2.setColor(darkShadow); |
| g2.drawLine(thumbRect.x+1, |
| thumbRect.y+thumbRect.height, |
| thumbRect.x+thumbRect.width, |
| thumbRect.y+thumbRect.height); // bottom |
| g2.drawLine(thumbRect.x+thumbRect.width, |
| thumbRect.y+1, |
| thumbRect.x+thumbRect.width, |
| thumbRect.y+thumbRect.height); // right |
| } finally { |
| if (useBufferedImage) { |
| g2.dispose(); |
| } |
| } |
| if (useBufferedImage) { |
| g.drawImage(buffer, 0, 0, null); |
| } |
| XToolkit.awtLock(); |
| try { |
| XlibWrapper.XFlush(XToolkit.getDisplay()); |
| } finally { |
| XToolkit.awtUnlock(); |
| } |
| } |
| |
| void paintArrows(Graphics2D g, Color background, Color darkShadow, Color lightShadow) { |
| |
| g.setColor(background); |
| |
| // paint firstArrow |
| if (pressed && (mode == AdjustmentEvent.UNIT_DECREMENT)) { |
| g.fill(firstArrow); |
| g.setColor(lightShadow); |
| g.drawLine(firstArrow.xpoints[0],firstArrow.ypoints[0], |
| firstArrow.xpoints[1],firstArrow.ypoints[1]); |
| g.drawLine(firstArrow.xpoints[1],firstArrow.ypoints[1], |
| firstArrow.xpoints[2],firstArrow.ypoints[2]); |
| g.setColor(darkShadow); |
| g.drawLine(firstArrow.xpoints[2],firstArrow.ypoints[2], |
| firstArrow.xpoints[0],firstArrow.ypoints[0]); |
| |
| } |
| else { |
| g.fill(firstArrow); |
| g.setColor(darkShadow); |
| g.drawLine(firstArrow.xpoints[0],firstArrow.ypoints[0], |
| firstArrow.xpoints[1],firstArrow.ypoints[1]); |
| g.drawLine(firstArrow.xpoints[1],firstArrow.ypoints[1], |
| firstArrow.xpoints[2],firstArrow.ypoints[2]); |
| g.setColor(lightShadow); |
| g.drawLine(firstArrow.xpoints[2],firstArrow.ypoints[2], |
| firstArrow.xpoints[0],firstArrow.ypoints[0]); |
| |
| } |
| |
| g.setColor(background); |
| // paint second Arrow |
| if (pressed && (mode == AdjustmentEvent.UNIT_INCREMENT)) { |
| g.fill(secondArrow); |
| g.setColor(lightShadow); |
| g.drawLine(secondArrow.xpoints[0],secondArrow.ypoints[0], |
| secondArrow.xpoints[1],secondArrow.ypoints[1]); |
| g.setColor(darkShadow); |
| g.drawLine(secondArrow.xpoints[1],secondArrow.ypoints[1], |
| secondArrow.xpoints[2],secondArrow.ypoints[2]); |
| g.drawLine(secondArrow.xpoints[2],secondArrow.ypoints[2], |
| secondArrow.xpoints[0],secondArrow.ypoints[0]); |
| |
| } |
| else { |
| g.fill(secondArrow); |
| g.setColor(darkShadow); |
| g.drawLine(secondArrow.xpoints[0],secondArrow.ypoints[0], |
| secondArrow.xpoints[1],secondArrow.ypoints[1]); |
| g.setColor(lightShadow); |
| g.drawLine(secondArrow.xpoints[1],secondArrow.ypoints[1], |
| secondArrow.xpoints[2],secondArrow.ypoints[2]); |
| g.drawLine(secondArrow.xpoints[2],secondArrow.ypoints[2], |
| secondArrow.xpoints[0],secondArrow.ypoints[0]); |
| |
| } |
| |
| } |
| |
| /** |
| * Tell the scroller to start scrolling. |
| */ |
| void startScrolling() { |
| log.finer("Start scrolling on " + this); |
| // Make sure that we scroll at least once |
| scroll(); |
| |
| // wake up the scroll repeater |
| if (scroller == null) { |
| // If there isn't a scroller, then create |
| // one and start it. |
| scroller = new XScrollRepeater(this); |
| } else { |
| scroller.setScrollbar(this); |
| } |
| scroller.start(); |
| } |
| |
| /** |
| * Tell the instance scroller to start scrolling. |
| * See 6243382 for more information |
| */ |
| void startScrollingInstance() { |
| log.finer("Start scrolling on " + this); |
| // Make sure that we scroll at least once |
| scroll(); |
| |
| i_scroller.setScrollbar(this); |
| i_scroller.start(); |
| } |
| |
| /** |
| * Tell the instance scroller to stop scrolling. |
| * See 6243382 for more information |
| */ |
| void stopScrollingInstance() { |
| log.finer("Stop scrolling on " + this); |
| |
| i_scroller.stop(); |
| } |
| |
| /** |
| * The set method for mode property. |
| * See 6243382 for more information |
| */ |
| public void setMode(int mode){ |
| this.mode = mode; |
| } |
| |
| /** |
| * Scroll one unit. |
| * @see notifyValue |
| */ |
| void scroll() { |
| switch (mode) { |
| case AdjustmentEvent.UNIT_DECREMENT: |
| notifyValue(val - line); |
| return; |
| |
| case AdjustmentEvent.UNIT_INCREMENT: |
| notifyValue(val + line); |
| return; |
| |
| case AdjustmentEvent.BLOCK_DECREMENT: |
| notifyValue(val - page); |
| return; |
| |
| case AdjustmentEvent.BLOCK_INCREMENT: |
| notifyValue(val + page); |
| return; |
| } |
| return; |
| } |
| |
| boolean isInArrow(int x, int y) { |
| // Mouse is considered to be in the arrow if it is anywhere in the |
| // arrow area. |
| int coord = (alignment == ALIGNMENT_HORIZONTAL ? x : y); |
| int arrAreaH = getArrowAreaWidth(); |
| |
| if (coord < arrAreaH || coord > barLength - arrAreaH + 1) { |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Is x,y in the scroll thumb? |
| * |
| * If we ever cache the thumb rect, we may need to clone the result of |
| * calculateThumbRect(). |
| */ |
| boolean isInThumb(int x, int y) { |
| Rectangle thumbRect = calculateThumbRect(); |
| |
| // If the mouse is in the shadow of the thumb or the shadow of the |
| // scroll track, treat it as hitting the thumb. So, slightly enlarge |
| // our rectangle. |
| thumbRect.x -= 1; |
| thumbRect.width += 3; |
| thumbRect.height += 1; |
| return thumbRect.contains(x,y); |
| } |
| |
| abstract boolean beforeThumb(int x, int y); |
| |
| /** |
| * |
| * @see java.awt.event.MouseEvent |
| * MouseEvent.MOUSE_CLICKED |
| * MouseEvent.MOUSE_PRESSED |
| * MouseEvent.MOUSE_RELEASED |
| * MouseEvent.MOUSE_MOVED |
| * MouseEvent.MOUSE_ENTERED |
| * MouseEvent.MOUSE_EXITED |
| * MouseEvent.MOUSE_DRAGGED |
| */ |
| public void handleMouseEvent(int id, int modifiers, int x, int y) { |
| if ((modifiers & InputEvent.BUTTON1_MASK) == 0) { |
| return; |
| } |
| |
| if (log.isLoggable(PlatformLogger.FINER)) { |
| String type; |
| switch (id) { |
| case MouseEvent.MOUSE_PRESSED: |
| type = "press"; |
| break; |
| case MouseEvent.MOUSE_RELEASED: |
| type = "release"; |
| break; |
| case MouseEvent.MOUSE_DRAGGED: |
| type = "drag"; |
| break; |
| default: |
| type = "other"; |
| } |
| log.finer("Mouse " + type + " event in scroll bar " + this + |
| "x = " + x + ", y = " + y + |
| ", on arrow: " + isInArrow(x, y) + |
| ", on thumb: " + isInThumb(x, y) + ", before thumb: " + beforeThumb(x, y) |
| + ", thumb rect" + calculateThumbRect()); |
| } |
| switch (id) { |
| case MouseEvent.MOUSE_PRESSED: |
| if (isInArrow(x, y)) { |
| pressed = true; |
| if (beforeThumb(x, y)) { |
| mode = AdjustmentEvent.UNIT_DECREMENT; |
| } else { |
| mode = AdjustmentEvent.UNIT_INCREMENT; |
| } |
| sb.repaintScrollbarRequest(this); |
| startScrolling(); |
| break; |
| } |
| |
| if (isInThumb(x, y)) { |
| mode = AdjustmentEvent.TRACK; |
| } else { |
| if (beforeThumb(x, y)) { |
| mode = AdjustmentEvent.BLOCK_DECREMENT; |
| } else { |
| mode = AdjustmentEvent.BLOCK_INCREMENT; |
| } |
| startScrolling(); |
| } |
| Rectangle pos = calculateThumbRect(); |
| thumbOffset = new Point(x - pos.x, y - pos.y); |
| break; |
| |
| case MouseEvent.MOUSE_RELEASED: |
| pressed = false; |
| sb.repaintScrollbarRequest(this); |
| scroller.stop(); |
| if(dragging){ |
| handleTrackEvent(x, y, false); |
| dragging=false; |
| } |
| break; |
| |
| case MouseEvent.MOUSE_DRAGGED: |
| dragging = true; |
| handleTrackEvent(x, y, true); |
| } |
| } |
| |
| private void handleTrackEvent(int x, int y, boolean isAdjusting){ |
| if (mode == AdjustmentEvent.TRACK) { |
| notifyValue(calculateCursorOffset(x, y), isAdjusting); |
| } |
| } |
| |
| private int calculateCursorOffset(int x, int y){ |
| if (alignment == ALIGNMENT_HORIZONTAL) { |
| if (dragging) |
| return Math.max(0,(int)((x - (thumbOffset.x + getArrowAreaWidth()))/getScaleFactor())) + min; |
| else |
| return Math.max(0,(int)((x - (getArrowAreaWidth()))/getScaleFactor())) + min; |
| } else { |
| if (dragging) |
| return Math.max(0,(int)((y - (thumbOffset.y + getArrowAreaWidth()))/getScaleFactor())) + min; |
| else |
| return Math.max(0,(int)((y - (getArrowAreaWidth()))/getScaleFactor())) + min; |
| } |
| } |
| |
| /* |
| private void updateNeedsRepaint() { |
| Rectangle thumbRect = calculateThumbRect(); |
| if (!prevThumb.equals(thumbRect)) { |
| needsRepaint = true; |
| } |
| prevThumb = thumbRect; |
| } |
| */ |
| |
| /** |
| * Sets the values for this Scrollbar. |
| * This method enforces the same constraints as in java.awt.Scrollbar: |
| * <UL> |
| * <LI> The maximum must be greater than the minimum </LI> |
| * <LI> The value must be greater than or equal to the minumum |
| * and less than or equal to the maximum minus the |
| * visible amount </LI> |
| * <LI> The visible amount must be greater than 1 and less than or equal |
| * to the difference between the maximum and minimum values. </LI> |
| * </UL> |
| * Values which do not meet these criteria are quietly coerced to the |
| * appropriate boundary value. |
| * @param value is the position in the current window. |
| * @param visible is the amount visible per page |
| * @param minimum is the minimum value of the scrollbar |
| * @param maximum is the maximum value of the scrollbar |
| */ |
| synchronized void setValues(int value, int visible, int minimum, int maximum) { |
| if (maximum <= minimum) { |
| maximum = minimum + 1; |
| } |
| if (visible > maximum - minimum) { |
| visible = maximum - minimum; |
| } |
| if (visible < 1) { |
| visible = 1; |
| } |
| if (value < minimum) { |
| value = minimum; |
| } |
| if (value > maximum - visible) { |
| value = maximum - visible; |
| } |
| |
| this.val = value; |
| this.vis = visible; |
| this.min = minimum; |
| this.max = maximum; |
| } |
| |
| /** |
| * Sets param of this Scrollbar to the specified values. |
| * @param value is the position in the current window. |
| * @param visible is the amount visible per page |
| * @param minimum is the minimum value of the scrollbar |
| * @param maximum is the maximum value of the scrollbar |
| * @param unitSize is the unit size for increment or decrement of the value |
| * @param page is the block size for increment or decrement of the value |
| * @see #setValues |
| */ |
| synchronized void setValues(int value, int visible, int minimum, int maximum, |
| int unitSize, int blockSize) { |
| /* Use setValues so that a consistent policy |
| * relating minimum, maximum, and value is enforced. |
| */ |
| setValues(value, visible, minimum, maximum); |
| setUnitIncrement(unitSize); |
| setBlockIncrement(blockSize); |
| } |
| |
| /** |
| * Returns the current value of this Scrollbar. |
| * @see #getMinimum |
| * @see #getMaximum |
| */ |
| int getValue() { |
| return val; |
| } |
| |
| /** |
| * Sets the value of this Scrollbar to the specified value. |
| * @param value the new value of the Scrollbar. If this value is |
| * below the current minimum or above the current maximum minus |
| * the visible amount, it becomes the new one of those values, |
| * respectively. |
| * @see #getValue |
| */ |
| synchronized void setValue(int newValue) { |
| /* Use setValues so that a consistent policy |
| * relating minimum, maximum, and value is enforced. |
| */ |
| setValues(newValue, vis, min, max); |
| } |
| |
| /** |
| * Returns the minimum value of this Scrollbar. |
| * @see #getMaximum |
| * @see #getValue |
| */ |
| int getMinimum() { |
| return min; |
| } |
| |
| /** |
| * Sets the minimum value for this Scrollbar. |
| * @param minimum the minimum value of the scrollbar |
| */ |
| synchronized void setMinimum(int newMinimum) { |
| /* Use setValues so that a consistent policy |
| * relating minimum, maximum, and value is enforced. |
| */ |
| setValues(val, vis, newMinimum, max); |
| } |
| |
| /** |
| * Returns the maximum value of this Scrollbar. |
| * @see #getMinimum |
| * @see #getValue |
| */ |
| int getMaximum() { |
| return max; |
| } |
| |
| /** |
| * Sets the maximum value for this Scrollbar. |
| * @param maximum the maximum value of the scrollbar |
| */ |
| synchronized void setMaximum(int newMaximum) { |
| /* Use setValues so that a consistent policy |
| * relating minimum, maximum, and value is enforced. |
| */ |
| setValues(val, vis, min, newMaximum); |
| } |
| |
| /** |
| * Returns the visible amount of this Scrollbar. |
| */ |
| int getVisibleAmount() { |
| return vis; |
| } |
| |
| /** |
| * Sets the visible amount of this Scrollbar, which is the range |
| * of values represented by the width of the scroll bar's bubble. |
| * @param visible the amount visible per page |
| */ |
| synchronized void setVisibleAmount(int newAmount) { |
| setValues(val, newAmount, min, max); |
| } |
| |
| /** |
| * Sets the unit increment for this scrollbar. This is the value |
| * that will be added (subtracted) when the user hits the unit down |
| * (up) gadgets. |
| * @param unitSize is the unit size for increment or decrement of the value |
| */ |
| synchronized void setUnitIncrement(int unitSize) { |
| line = unitSize; |
| } |
| |
| /** |
| * Gets the unit increment for this scrollbar. |
| */ |
| int getUnitIncrement() { |
| return line; |
| } |
| |
| /** |
| * Sets the block increment for this scrollbar. This is the value |
| * that will be added (subtracted) when the user hits the block down |
| * (up) gadgets. |
| * @param blockSize is the block size for increment or decrement of the value |
| */ |
| synchronized void setBlockIncrement(int blockSize) { |
| page = blockSize; |
| } |
| |
| /** |
| * Gets the block increment for this scrollbar. |
| */ |
| int getBlockIncrement() { |
| return page; |
| } |
| |
| /** |
| * Width of the arrow image |
| */ |
| int getArrowWidth() { |
| return getArrowAreaWidth() - 2*ARROW_IND; |
| } |
| |
| /** |
| * Width of the area reserved for arrow |
| */ |
| int getArrowAreaWidth() { |
| return arrowArea; |
| } |
| |
| void calculateArrowWidth() { |
| if (barLength < 2*barWidth + MIN_THUMB_H + 2) { |
| arrowArea = (barLength - MIN_THUMB_H + 2*ARROW_IND)/2 - 1; |
| } |
| else { |
| arrowArea = barWidth - 1; |
| } |
| } |
| |
| /** |
| * Returns the scale factor for the thumbArea ( thumbAreaH / (max - min)). |
| * @see #getArrowAreaSize |
| */ |
| private double getScaleFactor(){ |
| double f = (double)(barLength - 2*getArrowAreaWidth()) / Math.max(1,(max - min)); |
| return f; |
| } |
| |
| /** |
| * Method to calculate the scroll thumb's size and position. This is |
| * based on CalcSliderRect in ScrollBar.c of Motif source. |
| * |
| * If we ever cache the thumb rect, we'll need to use a clone in |
| * isInThumb(). |
| */ |
| protected Rectangle calculateThumbRect() { |
| float range; |
| float trueSize; // Area of scroll track |
| float factor; |
| float slideSize; |
| int minSliderWidth; |
| int minSliderHeight; |
| int hitTheWall = 0; |
| int arrAreaH = getArrowAreaWidth(); |
| Rectangle retVal = new Rectangle(0,0,0,0); |
| |
| trueSize = barLength - 2*arrAreaH - 1; // Same if vert or horiz |
| |
| if (alignment == ALIGNMENT_HORIZONTAL) { |
| minSliderWidth = MIN_THUMB_H ; // Base on user-set vis? |
| minSliderHeight = height - 3; |
| } |
| else { // Vertical |
| minSliderWidth = width - 3; |
| minSliderHeight = MIN_THUMB_H ; |
| |
| } |
| |
| // Total number of user units displayed |
| range = max - min; |
| |
| // A naive notion of pixels per user unit |
| factor = trueSize / range; |
| |
| // A naive notion of the size of the slider in pixels |
| // in thermo, slider_size is 0 ans is ignored |
| slideSize = vis * factor; |
| |
| if (alignment == ALIGNMENT_HORIZONTAL) { |
| // Simulating MAX_SCROLLBAR_DIMENSION macro |
| int localVal = (int) (slideSize + 0.5); |
| int localMin = minSliderWidth; |
| if (localVal > localMin) { |
| retVal.width = localVal; |
| } |
| else { |
| retVal.width = localMin; |
| hitTheWall = localMin; |
| } |
| retVal.height = minSliderHeight; |
| } |
| else { // Vertical |
| retVal.width = minSliderWidth; |
| |
| // Simulating MAX_SCROLLBAR_DIMENSION macro |
| int localVal = (int) (slideSize + 0.5); |
| int localMin = minSliderHeight; |
| if (localVal > localMin) { |
| retVal.height = localVal; |
| } |
| else { |
| retVal.height = localMin; |
| hitTheWall = localMin; |
| } |
| } |
| |
| if (hitTheWall != 0) { |
| trueSize -= hitTheWall; // Actual pixels available |
| range -= vis; // Actual range |
| factor = trueSize / range; |
| } |
| |
| if (alignment == ALIGNMENT_HORIZONTAL) { |
| retVal.x = ((int) (((((float) val) |
| - ((float) min)) * factor) + 0.5)) |
| + arrAreaH; |
| retVal.y = 1; |
| |
| } |
| else { |
| retVal.x = 1; |
| retVal.y = ((int) (((((float) val) |
| - ((float) min)) * factor) + 0.5)) |
| + arrAreaH; |
| } |
| |
| // There was one final adjustment here in the Motif function, which was |
| // noted to be for backward-compatiblity. It has been left out for now. |
| |
| return retVal; |
| } |
| |
| public String toString() { |
| return getClass() + "[" + width + "x" + height + "," + barWidth + "x" + barLength + "]"; |
| } |
| } |
| |
| |
| class XScrollRepeater implements Runnable { |
| /** |
| * Time to pause before the first scroll repeat. |
| */ |
| static int beginPause = 500; |
| // Reminder - make this a user definable property |
| |
| /** |
| * Time to pause between each scroll repeat. |
| */ |
| static int repeatPause = 100; |
| // Reminder - make this a user definable property |
| |
| /** |
| * The scrollbar that we sending scrolling. |
| */ |
| XScrollbar sb; |
| |
| /** |
| * newScroll gets reset when a new scrollbar gets set. |
| */ |
| boolean newScroll; |
| |
| |
| boolean shouldSkip; |
| |
| /** |
| * Creates a new scroll repeater. |
| * @param sb the scrollbar that this thread will scroll |
| */ |
| XScrollRepeater(XScrollbar sb) { |
| this.setScrollbar(sb); |
| newScroll = true; |
| } |
| |
| public void start() { |
| stop(); |
| shouldSkip = false; |
| XToolkit.schedule(this, beginPause); |
| } |
| |
| public void stop() { |
| synchronized(this) { |
| shouldSkip = true; |
| } |
| XToolkit.remove(this); |
| } |
| |
| /** |
| * Sets the scrollbar. |
| * @param sb the scrollbar that this thread will scroll |
| */ |
| public synchronized void setScrollbar(XScrollbar sb) { |
| this.sb = sb; |
| stop(); |
| newScroll = true; |
| } |
| |
| public void run () { |
| synchronized(this) { |
| if (shouldSkip) { |
| return; |
| } |
| } |
| sb.scroll(); |
| XToolkit.schedule(this, repeatPause); |
| } |
| |
| } |
