| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Eclipse Public License, Version 1.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.eclipse.org/org/documents/epl-v10.php |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.ide.eclipse.adt.internal.ui; |
| |
| import static com.android.SdkConstants.DOT_9PNG; |
| import static com.android.utils.SdkUtils.endsWithIgnoreCase; |
| |
| import com.android.ide.common.rendering.api.ResourceValue; |
| import com.android.ide.common.resources.ResourceResolver; |
| import com.android.ide.eclipse.adt.AdtPlugin; |
| import com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart; |
| import com.android.ide.eclipse.adt.internal.editors.layout.gle2.ImageControl; |
| import com.android.ide.eclipse.adt.internal.editors.layout.gle2.ImageUtils; |
| import com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderService; |
| import com.android.ide.eclipse.adt.internal.editors.layout.gle2.SwtUtils; |
| import com.android.ide.eclipse.adt.internal.resources.ResourceHelper; |
| import com.android.resources.ResourceType; |
| |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.jface.dialogs.DialogTray; |
| import org.eclipse.jface.dialogs.TrayDialog; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.graphics.RGB; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Label; |
| |
| import java.awt.image.BufferedImage; |
| import java.io.File; |
| import java.io.IOException; |
| |
| import javax.imageio.ImageIO; |
| |
| /** |
| * The {@link ResourcePreviewHelper} provides help to {@link TrayDialog} resource choosers |
| * where some resources (such as drawables and colors) are previewed in the tray area. |
| */ |
| public class ResourcePreviewHelper { |
| /** |
| * The width of the preview rendering |
| * <p> |
| * TODO: Make the preview rendering resize if the tray area is resized |
| */ |
| private static final int WIDTH = 100; |
| /** The height of the preview rendering */ |
| private static final int HEIGHT = 100; |
| |
| private final GraphicalEditorPart mEditor; |
| private final TrayDialog mTrayDialog; |
| |
| private boolean mShowingPreview; |
| private DialogTray mPreviewTray; |
| private ImageControl mPreviewImageControl; |
| |
| /** |
| * Constructs a new {@link ResourcePreviewHelper}. |
| * <p> |
| * TODO: Add support for performing previews without an associated graphical editor, |
| * such as previewing icons from the manifest form editor; just pick default |
| * configuration settings in that case. |
| * |
| * @param trayDialog the associated tray-capable dialog |
| * @param editor a graphical editor. This is currently needed in order to provide |
| * configuration data for the rendering. |
| */ |
| public ResourcePreviewHelper(TrayDialog trayDialog, GraphicalEditorPart editor) { |
| this.mTrayDialog = trayDialog; |
| this.mEditor = editor; |
| } |
| |
| /** |
| * Updates the preview based on the current selection and resource type, possibly |
| * hiding or opening the tray in the process. |
| * |
| * @param type the resource type for the selected resource |
| * @param resource the full resource url |
| */ |
| public void updatePreview(ResourceType type, String resource) { |
| boolean showPreview = type == ResourceType.DRAWABLE || type == ResourceType.COLOR; |
| if (showPreview) { |
| if (mPreviewTray == null) { |
| mPreviewTray = new DialogTray() { |
| @Override |
| protected Control createContents(Composite parent) { |
| // This creates a centered image control |
| Composite panel = new Composite(parent, SWT.NONE); |
| panel.setLayout(new GridLayout(3, false)); |
| Label dummy1 = new Label(panel, SWT.NONE); |
| dummy1.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, true, 1, 1)); |
| mPreviewImageControl = new ImageControl(panel, SWT.NONE, SwtUtils |
| .createEmptyImage(parent.getDisplay(), WIDTH, HEIGHT)); |
| GridData gd = new GridData(SWT.CENTER, SWT.CENTER, false, false, 1, 1); |
| gd.widthHint = WIDTH; |
| gd.heightHint = HEIGHT; |
| mPreviewImageControl.setLayoutData(gd); |
| Label dummy2 = new Label(panel, SWT.NONE); |
| dummy2.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, true, 1, 1)); |
| |
| return panel; |
| } |
| |
| }; |
| } |
| |
| if (!mShowingPreview) { |
| mTrayDialog.openTray(mPreviewTray); |
| } |
| |
| BufferedImage image = null; |
| try { |
| if (type == ResourceType.COLOR) { |
| ResourceResolver resources = mEditor.getResourceResolver(); |
| ResourceValue value = resources.findResValue(resource, false); |
| if (value != null) { |
| RGB color = ResourceHelper.resolveColor(resources, value); |
| if (color != null) { |
| image = ImageUtils.createColoredImage(WIDTH, HEIGHT, color); |
| } |
| } |
| } else { |
| assert type == ResourceType.DRAWABLE; |
| |
| ResourceResolver resources = mEditor.getResourceResolver(); |
| ResourceValue drawable = resources.findResValue(resource, false); |
| if (drawable != null) { |
| String path = drawable.getValue(); |
| |
| // Special-case image files (other than 9-patch files) and render these |
| // directly, in order to provide proper aspect ratio handling and |
| // to handle scaling to show the full contents: |
| if (ImageUtils.hasImageExtension(path) |
| && !endsWithIgnoreCase(path, DOT_9PNG)) { |
| File file = new File(path); |
| if (file.exists()) { |
| try { |
| image = ImageIO.read(file); |
| int width = image.getWidth(); |
| int height = image.getHeight(); |
| if (width > WIDTH || height > HEIGHT) { |
| double xScale = WIDTH / (double) width; |
| double yScale = HEIGHT / (double) height; |
| double scale = Math.min(xScale, yScale); |
| image = ImageUtils.scale(image, scale, scale); |
| } |
| } catch (IOException e) { |
| AdtPlugin.log(e, "Can't read preview image %1$s", path); |
| } |
| } |
| } |
| |
| if (image == null) { |
| RenderService renderService = RenderService.create(mEditor); |
| renderService.setOverrideRenderSize(WIDTH, HEIGHT); |
| image = renderService.renderDrawable(drawable); |
| } |
| } |
| } |
| } catch (Throwable t) { |
| // Some kind of rendering error occurred. However, we don't want to use |
| // AdtPlugin.log(t, "Can't generate preview for %1$s", resource); |
| // because if it's a severe type of error (such as an InternalError shown |
| // in issue #18623) then a dialog will pop up and interfere with the |
| // preview, so just log a warning (unfortunately without the trace) instead. |
| AdtPlugin.log(IStatus.WARNING, "Can't generate preview for %1$s", resource); |
| } |
| |
| Display display = mEditor.getSite().getShell().getDisplay(); |
| if (image != null) { |
| mPreviewImageControl.setImage(SwtUtils.convertToSwt(display, image, true, -1)); |
| } else { |
| mPreviewImageControl.setImage(SwtUtils.createEmptyImage(display, WIDTH, HEIGHT)); |
| } |
| mPreviewImageControl.redraw(); |
| } else if (mPreviewTray != null && mShowingPreview) { |
| mTrayDialog.closeTray(); |
| } |
| mShowingPreview = showPreview; |
| } |
| } |
