List of usage examples for org.eclipse.swt.widgets ScrollBar setEnabled
public void setEnabled(boolean enabled)
true, and disables it otherwise. From source file:org.eclipse.swt.examples.clipboard.ClipboardExample.java
void createImageTransfer(Composite copyParent, Composite pasteParent) { final Image[] copyImage = new Image[] { null }; Label l = new Label(copyParent, SWT.NONE); l.setText("ImageTransfer:"); //$NON-NLS-1$ GridData data = new GridData(); data.verticalSpan = 2;/* w w w. j a va 2 s . c o m*/ l.setLayoutData(data); final Canvas copyImageCanvas = new Canvas(copyParent, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL); data = new GridData(GridData.FILL_BOTH); data.verticalSpan = 2; data.widthHint = HSIZE; data.heightHint = VSIZE; copyImageCanvas.setLayoutData(data); final Point copyOrigin = new Point(0, 0); final ScrollBar copyHBar = copyImageCanvas.getHorizontalBar(); copyHBar.setEnabled(false); copyHBar.addListener(SWT.Selection, e -> { if (copyImage[0] != null) { int hSelection = copyHBar.getSelection(); int destX = -hSelection - copyOrigin.x; Rectangle rect = copyImage[0].getBounds(); copyImageCanvas.scroll(destX, 0, 0, 0, rect.width, rect.height, false); copyOrigin.x = -hSelection; } }); final ScrollBar copyVBar = copyImageCanvas.getVerticalBar(); copyVBar.setEnabled(false); copyVBar.addListener(SWT.Selection, e -> { if (copyImage[0] != null) { int vSelection = copyVBar.getSelection(); int destY = -vSelection - copyOrigin.y; Rectangle rect = copyImage[0].getBounds(); copyImageCanvas.scroll(0, destY, 0, 0, rect.width, rect.height, false); copyOrigin.y = -vSelection; } }); copyImageCanvas.addListener(SWT.Paint, e -> { if (copyImage[0] != null) { GC gc = e.gc; gc.drawImage(copyImage[0], copyOrigin.x, copyOrigin.y); Rectangle rect = copyImage[0].getBounds(); Rectangle client = copyImageCanvas.getClientArea(); int marginWidth = client.width - rect.width; if (marginWidth > 0) { gc.fillRectangle(rect.width, 0, marginWidth, client.height); } int marginHeight = client.height - rect.height; if (marginHeight > 0) { gc.fillRectangle(0, rect.height, client.width, marginHeight); } gc.dispose(); } }); Button openButton = new Button(copyParent, SWT.PUSH); openButton.setText("Open Image"); openButton.addSelectionListener(widgetSelectedAdapter(e -> { FileDialog dialog = new FileDialog(shell, SWT.OPEN); dialog.setText("Open an image file or cancel"); String string = dialog.open(); if (string != null) { if (copyImage[0] != null) { System.out.println("CopyImage"); copyImage[0].dispose(); } copyImage[0] = new Image(e.display, string); copyVBar.setEnabled(true); copyHBar.setEnabled(true); copyOrigin.x = 0; copyOrigin.y = 0; Rectangle rect = copyImage[0].getBounds(); Rectangle client = copyImageCanvas.getClientArea(); copyHBar.setMaximum(rect.width); copyVBar.setMaximum(rect.height); copyHBar.setThumb(Math.min(rect.width, client.width)); copyVBar.setThumb(Math.min(rect.height, client.height)); copyImageCanvas.scroll(0, 0, 0, 0, rect.width, rect.height, true); copyVBar.setSelection(0); copyHBar.setSelection(0); copyImageCanvas.redraw(); } })); Button b = new Button(copyParent, SWT.PUSH); b.setText("Copy"); b.addSelectionListener(widgetSelectedAdapter(e -> { if (copyImage[0] != null) { status.setText(""); // Fetch ImageData at current zoom and save in the clip-board. clipboard.setContents(new Object[] { copyImage[0].getImageDataAtCurrentZoom() }, new Transfer[] { ImageTransfer.getInstance() }); } else { status.setText("No image to copy"); } })); final Image[] pasteImage = new Image[] { null }; l = new Label(pasteParent, SWT.NONE); l.setText("ImageTransfer:"); final Canvas pasteImageCanvas = new Canvas(pasteParent, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL); data = new GridData(GridData.FILL_BOTH); data.widthHint = HSIZE; data.heightHint = VSIZE; pasteImageCanvas.setLayoutData(data); final Point pasteOrigin = new Point(0, 0); final ScrollBar pasteHBar = pasteImageCanvas.getHorizontalBar(); pasteHBar.setEnabled(false); pasteHBar.addListener(SWT.Selection, e -> { if (pasteImage[0] != null) { int hSelection = pasteHBar.getSelection(); int destX = -hSelection - pasteOrigin.x; Rectangle rect = pasteImage[0].getBounds(); pasteImageCanvas.scroll(destX, 0, 0, 0, rect.width, rect.height, false); pasteOrigin.x = -hSelection; } }); final ScrollBar pasteVBar = pasteImageCanvas.getVerticalBar(); pasteVBar.setEnabled(false); pasteVBar.addListener(SWT.Selection, e -> { if (pasteImage[0] != null) { int vSelection = pasteVBar.getSelection(); int destY = -vSelection - pasteOrigin.y; Rectangle rect = pasteImage[0].getBounds(); pasteImageCanvas.scroll(0, destY, 0, 0, rect.width, rect.height, false); pasteOrigin.y = -vSelection; } }); pasteImageCanvas.addListener(SWT.Paint, e -> { if (pasteImage[0] != null) { GC gc = e.gc; gc.drawImage(pasteImage[0], pasteOrigin.x, pasteOrigin.y); Rectangle rect = pasteImage[0].getBounds(); Rectangle client = pasteImageCanvas.getClientArea(); int marginWidth = client.width - rect.width; if (marginWidth > 0) { gc.fillRectangle(rect.width, 0, marginWidth, client.height); } int marginHeight = client.height - rect.height; if (marginHeight > 0) { gc.fillRectangle(0, rect.height, client.width, marginHeight); } } }); b = new Button(pasteParent, SWT.PUSH); b.setText("Paste"); b.addSelectionListener(widgetSelectedAdapter(e -> { ImageData imageData = (ImageData) clipboard.getContents(ImageTransfer.getInstance()); if (imageData != null) { if (pasteImage[0] != null) { System.out.println("PasteImage"); pasteImage[0].dispose(); } status.setText(""); // Consume the ImageData at current zoom as-is. pasteImage[0] = new Image(e.display, new AutoScaleImageDataProvider(imageData)); pasteVBar.setEnabled(true); pasteHBar.setEnabled(true); pasteOrigin.x = 0; pasteOrigin.y = 0; Rectangle rect = pasteImage[0].getBounds(); Rectangle client = pasteImageCanvas.getClientArea(); pasteHBar.setMaximum(rect.width); pasteVBar.setMaximum(rect.height); pasteHBar.setThumb(Math.min(rect.width, client.width)); pasteVBar.setThumb(Math.min(rect.height, client.height)); pasteImageCanvas.scroll(0, 0, 0, 0, rect.width, rect.height, true); pasteVBar.setSelection(0); pasteHBar.setSelection(0); pasteImageCanvas.redraw(); } else { status.setText("No image to paste"); } })); }
From source file:ImageAnalyzer.java
void resizeScrollBars() { // Set the max and thumb for the image canvas scroll bars. ScrollBar horizontal = imageCanvas.getHorizontalBar(); ScrollBar vertical = imageCanvas.getVerticalBar(); Rectangle canvasBounds = imageCanvas.getClientArea(); int width = Math.round(imageData.width * xscale); if (width > canvasBounds.width) { // The image is wider than the canvas. horizontal.setEnabled(true); horizontal.setMaximum(width);//ww w.j a va2 s . co m horizontal.setThumb(canvasBounds.width); horizontal.setPageIncrement(canvasBounds.width); } else { // The canvas is wider than the image. horizontal.setEnabled(false); if (ix != 0) { // Make sure the image is completely visible. ix = 0; imageCanvas.redraw(); } } int height = Math.round(imageData.height * yscale); if (height > canvasBounds.height) { // The image is taller than the canvas. vertical.setEnabled(true); vertical.setMaximum(height); vertical.setThumb(canvasBounds.height); vertical.setPageIncrement(canvasBounds.height); } else { // The canvas is taller than the image. vertical.setEnabled(false); if (iy != 0) { // Make sure the image is completely visible. iy = 0; imageCanvas.redraw(); } } // Set the max and thumb for the palette canvas scroll bar. vertical = paletteCanvas.getVerticalBar(); if (imageData.palette.isDirect) { vertical.setEnabled(false); } else { // indexed palette canvasBounds = paletteCanvas.getClientArea(); int paletteHeight = imageData.palette.getRGBs().length * 10 + 20; // 10 // pixels // each // index // + 20 // for // margins. vertical.setEnabled(true); vertical.setMaximum(paletteHeight); vertical.setThumb(canvasBounds.height); vertical.setPageIncrement(canvasBounds.height); } }
From source file:ImageAnalyzer.java
void createWidgets() { // Add the widgets to the shell in a grid layout. GridLayout layout = new GridLayout(); layout.marginHeight = 0;/*from w ww . j a va 2 s . c om*/ layout.numColumns = 2; shell.setLayout(layout); // Separate the menu bar from the rest of the widgets. Label separator = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL); GridData gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; separator.setLayoutData(gridData); // Add a composite to contain some control widgets across the top. Composite controls = new Composite(shell, SWT.NULL); RowLayout rowLayout = new RowLayout(); rowLayout.marginTop = 0; rowLayout.marginBottom = 5; rowLayout.spacing = 8; controls.setLayout(rowLayout); gridData = new GridData(); gridData.horizontalSpan = 2; controls.setLayoutData(gridData); // Combo to change the background. Group group = new Group(controls, SWT.NULL); group.setLayout(new RowLayout()); group.setText("Background"); backgroundCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); backgroundCombo.setItems(new String[] { "None", "White", "Black", "Red", "Green", "Blue" }); backgroundCombo.select(backgroundCombo.indexOf("White")); backgroundCombo.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { changeBackground(); } }); // Combo to change the x scale. String[] values = { "0.1", "0.2", "0.3", "0.4", "0.5", "0.6", "0.7", "0.8", "0.9", "1", "1.1", "1.2", "1.3", "1.4", "1.5", "1.6", "1.7", "1.8", "1.9", "2", "3", "4", "5", "6", "7", "8", "9", "10", }; group = new Group(controls, SWT.NULL); group.setLayout(new RowLayout()); group.setText("X_scale"); scaleXCombo = new Combo(group, SWT.DROP_DOWN); for (int i = 0; i < values.length; i++) { scaleXCombo.add(values[i]); } scaleXCombo.select(scaleXCombo.indexOf("1")); scaleXCombo.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { scaleX(); } }); // Combo to change the y scale. group = new Group(controls, SWT.NULL); group.setLayout(new RowLayout()); group.setText("Y_scale"); scaleYCombo = new Combo(group, SWT.DROP_DOWN); for (int i = 0; i < values.length; i++) { scaleYCombo.add(values[i]); } scaleYCombo.select(scaleYCombo.indexOf("1")); scaleYCombo.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { scaleY(); } }); // Combo to change the alpha value. group = new Group(controls, SWT.NULL); group.setLayout(new RowLayout()); group.setText("Alpha_K"); alphaCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); for (int i = 0; i <= 255; i += 5) { alphaCombo.add(String.valueOf(i)); } alphaCombo.select(alphaCombo.indexOf("255")); alphaCombo.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { alpha(); } }); // Check box to request incremental display. group = new Group(controls, SWT.NULL); group.setLayout(new RowLayout()); group.setText("Display"); incrementalCheck = new Button(group, SWT.CHECK); incrementalCheck.setText("Incremental"); incrementalCheck.setSelection(incremental); incrementalCheck.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { incremental = ((Button) event.widget).getSelection(); } }); // Check box to request transparent display. transparentCheck = new Button(group, SWT.CHECK); transparentCheck.setText("Transparent"); transparentCheck.setSelection(transparent); transparentCheck.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { transparent = ((Button) event.widget).getSelection(); if (image != null) { imageCanvas.redraw(); } } }); // Check box to request mask display. maskCheck = new Button(group, SWT.CHECK); maskCheck.setText("Mask"); maskCheck.setSelection(showMask); maskCheck.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { showMask = ((Button) event.widget).getSelection(); if (image != null) { imageCanvas.redraw(); } } }); // Check box to request background display. backgroundCheck = new Button(group, SWT.CHECK); backgroundCheck.setText("Background"); backgroundCheck.setSelection(showBackground); backgroundCheck.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { showBackground = ((Button) event.widget).getSelection(); } }); // Group the animation buttons. group = new Group(controls, SWT.NULL); group.setLayout(new RowLayout()); group.setText("Animation"); // Push button to display the previous image in a multi-image file. previousButton = new Button(group, SWT.PUSH); previousButton.setText("Previous"); previousButton.setEnabled(false); previousButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { previous(); } }); // Push button to display the next image in a multi-image file. nextButton = new Button(group, SWT.PUSH); nextButton.setText("Next"); nextButton.setEnabled(false); nextButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { next(); } }); // Push button to toggle animation of a multi-image file. animateButton = new Button(group, SWT.PUSH); animateButton.setText("Animate"); animateButton.setEnabled(false); animateButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { animate(); } }); // Label to show the image file type. typeLabel = new Label(shell, SWT.NULL); typeLabel.setText("Type_initial"); typeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Canvas to show the image. imageCanvas = new Canvas(shell, SWT.V_SCROLL | SWT.H_SCROLL | SWT.NO_REDRAW_RESIZE); imageCanvas.setBackground(whiteColor); imageCanvas.setCursor(crossCursor); gridData = new GridData(); gridData.verticalSpan = 15; gridData.horizontalAlignment = GridData.FILL; gridData.verticalAlignment = GridData.FILL; gridData.grabExcessHorizontalSpace = true; gridData.grabExcessVerticalSpace = true; imageCanvas.setLayoutData(gridData); imageCanvas.addPaintListener(new PaintListener() { public void paintControl(PaintEvent event) { if (image != null) paintImage(event); } }); imageCanvas.addMouseMoveListener(new MouseMoveListener() { public void mouseMove(MouseEvent event) { if (image != null) { showColorAt(event.x, event.y); } } }); // Set up the image canvas scroll bars. ScrollBar horizontal = imageCanvas.getHorizontalBar(); horizontal.setVisible(true); horizontal.setMinimum(0); horizontal.setEnabled(false); horizontal.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { scrollHorizontally((ScrollBar) event.widget); } }); ScrollBar vertical = imageCanvas.getVerticalBar(); vertical.setVisible(true); vertical.setMinimum(0); vertical.setEnabled(false); vertical.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { scrollVertically((ScrollBar) event.widget); } }); // Label to show the image size. sizeLabel = new Label(shell, SWT.NULL); sizeLabel.setText("Size_initial"); sizeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image depth. depthLabel = new Label(shell, SWT.NULL); depthLabel.setText("Depth_initial"); depthLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the transparent pixel. transparentPixelLabel = new Label(shell, SWT.NULL); transparentPixelLabel.setText("Transparent_pixel_initial"); transparentPixelLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the time to load. timeToLoadLabel = new Label(shell, SWT.NULL); timeToLoadLabel.setText("Time_to_load_initial"); timeToLoadLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Separate the animation fields from the rest of the fields. separator = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL); separator.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the logical screen size for animation. screenSizeLabel = new Label(shell, SWT.NULL); screenSizeLabel.setText("Animation_size_initial"); screenSizeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the background pixel. backgroundPixelLabel = new Label(shell, SWT.NULL); backgroundPixelLabel.setText("Background_pixel_initial"); backgroundPixelLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image location (x, y). locationLabel = new Label(shell, SWT.NULL); locationLabel.setText("Image_location_initial"); locationLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image disposal method. disposalMethodLabel = new Label(shell, SWT.NULL); disposalMethodLabel.setText("Disposal_initial"); disposalMethodLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image delay time. delayTimeLabel = new Label(shell, SWT.NULL); delayTimeLabel.setText("Delay_initial"); delayTimeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the background pixel. repeatCountLabel = new Label(shell, SWT.NULL); repeatCountLabel.setText("Repeats_initial"); repeatCountLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Separate the animation fields from the palette. separator = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL); separator.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show if the image has a direct or indexed palette. paletteLabel = new Label(shell, SWT.NULL); paletteLabel.setText("Palette_initial"); paletteLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Canvas to show the image's palette. paletteCanvas = new Canvas(shell, SWT.BORDER | SWT.V_SCROLL | SWT.NO_REDRAW_RESIZE); paletteCanvas.setFont(fixedWidthFont); paletteCanvas.getVerticalBar().setVisible(true); gridData = new GridData(); gridData.horizontalAlignment = GridData.FILL; gridData.verticalAlignment = GridData.FILL; GC gc = new GC(paletteLabel); paletteWidth = gc.stringExtent("Max_length_string").x; gc.dispose(); gridData.widthHint = paletteWidth; gridData.heightHint = 16 * 11; // show at least 16 colors paletteCanvas.setLayoutData(gridData); paletteCanvas.addPaintListener(new PaintListener() { public void paintControl(PaintEvent event) { if (image != null) paintPalette(event); } }); // Set up the palette canvas scroll bar. vertical = paletteCanvas.getVerticalBar(); vertical.setVisible(true); vertical.setMinimum(0); vertical.setIncrement(10); vertical.setEnabled(false); vertical.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { scrollPalette((ScrollBar) event.widget); } }); // Sash to see more of image or image data. sash = new Sash(shell, SWT.HORIZONTAL); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; sash.setLayoutData(gridData); sash.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { if (event.detail != SWT.DRAG) { ((GridData) paletteCanvas.getLayoutData()).heightHint = SWT.DEFAULT; Rectangle paletteCanvasBounds = paletteCanvas.getBounds(); int minY = paletteCanvasBounds.y + 20; Rectangle dataLabelBounds = dataLabel.getBounds(); int maxY = statusLabel.getBounds().y - dataLabelBounds.height - 20; if (event.y > minY && event.y < maxY) { Rectangle oldSash = sash.getBounds(); sash.setBounds(event.x, event.y, event.width, event.height); int diff = event.y - oldSash.y; Rectangle bounds = imageCanvas.getBounds(); imageCanvas.setBounds(bounds.x, bounds.y, bounds.width, bounds.height + diff); bounds = paletteCanvasBounds; paletteCanvas.setBounds(bounds.x, bounds.y, bounds.width, bounds.height + diff); bounds = dataLabelBounds; dataLabel.setBounds(bounds.x, bounds.y + diff, bounds.width, bounds.height); bounds = dataText.getBounds(); dataText.setBounds(bounds.x, bounds.y + diff, bounds.width, bounds.height - diff); // shell.layout(true); } } } }); // Label to show data-specific fields. dataLabel = new Label(shell, SWT.NULL); dataLabel.setText("Pixel_data_initial"); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; dataLabel.setLayoutData(gridData); // Text to show a dump of the data. dataText = new StyledText(shell, SWT.BORDER | SWT.MULTI | SWT.READ_ONLY | SWT.V_SCROLL | SWT.H_SCROLL); dataText.setBackground(display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND)); dataText.setFont(fixedWidthFont); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; gridData.verticalAlignment = GridData.FILL; gridData.heightHint = 128; gridData.grabExcessVerticalSpace = true; dataText.setLayoutData(gridData); dataText.addMouseListener(new MouseAdapter() { public void mouseDown(MouseEvent event) { if (image != null && event.button == 1) { showColorForData(); } } }); dataText.addKeyListener(new KeyAdapter() { public void keyPressed(KeyEvent event) { if (image != null) { showColorForData(); } } }); // Label to show status and cursor location in image. statusLabel = new Label(shell, SWT.NULL); statusLabel.setText(""); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; statusLabel.setLayoutData(gridData); }
From source file:org.eclipse.swt.examples.imageanalyzer.ImageAnalyzer.java
void resizeScrollBars() { // Set the max and thumb for the image canvas scroll bars. ScrollBar horizontal = imageCanvas.getHorizontalBar(); ScrollBar vertical = imageCanvas.getVerticalBar(); Rectangle canvasBounds = imageCanvas.getClientArea(); int width = Math.round(imageData.width * xscale); if (width > canvasBounds.width) { // The image is wider than the canvas. horizontal.setEnabled(true); horizontal.setMaximum(width);/*from w ww .jav a2 s. com*/ horizontal.setThumb(canvasBounds.width); horizontal.setPageIncrement(canvasBounds.width); } else { // The canvas is wider than the image. horizontal.setEnabled(false); if (ix != 0) { // Make sure the image is completely visible. ix = 0; imageCanvas.redraw(); } } int height = Math.round(imageData.height * yscale); if (height > canvasBounds.height) { // The image is taller than the canvas. vertical.setEnabled(true); vertical.setMaximum(height); vertical.setThumb(canvasBounds.height); vertical.setPageIncrement(canvasBounds.height); } else { // The canvas is taller than the image. vertical.setEnabled(false); if (iy != 0) { // Make sure the image is completely visible. iy = 0; imageCanvas.redraw(); } } // Set the max and thumb for the palette canvas scroll bar. vertical = paletteCanvas.getVerticalBar(); if (imageData.palette.isDirect) { vertical.setEnabled(false); } else { // indexed palette canvasBounds = paletteCanvas.getClientArea(); int paletteHeight = imageData.palette.getRGBs().length * 10 + 20; // 10 pixels each index + 20 for margins. vertical.setEnabled(true); vertical.setMaximum(paletteHeight); vertical.setThumb(canvasBounds.height); vertical.setPageIncrement(canvasBounds.height); } }
From source file:org.eclipse.swt.examples.imageanalyzer.ImageAnalyzer.java
void createWidgets() { // Add the widgets to the shell in a grid layout. GridLayout layout = new GridLayout(); layout.marginHeight = 0;/*w ww . ja v a 2s . c om*/ layout.numColumns = 2; shell.setLayout(layout); // Add a composite to contain some control widgets across the top. Composite controls = new Composite(shell, SWT.NONE); RowLayout rowLayout = new RowLayout(); rowLayout.marginTop = 5; rowLayout.marginBottom = 5; rowLayout.spacing = 8; controls.setLayout(rowLayout); GridData gridData = new GridData(); gridData.horizontalSpan = 2; controls.setLayoutData(gridData); // Combo to change the background. Group group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("Background")); backgroundCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); backgroundCombo.setItems(bundle.getString("None"), bundle.getString("White"), bundle.getString("Black"), bundle.getString("Red"), bundle.getString("Green"), bundle.getString("Blue")); backgroundCombo.select(backgroundCombo.indexOf(bundle.getString("White"))); backgroundCombo.addSelectionListener(widgetSelectedAdapter(event -> changeBackground())); // Combo to change the compression ratio. group = new Group(controls, SWT.NONE); group.setLayout(new GridLayout(3, true)); group.setText(bundle.getString("Save_group")); imageTypeCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); String[] types = { "JPEG", "PNG", "GIF", "ICO", "TIFF", "BMP" }; for (String type : types) { imageTypeCombo.add(type); } imageTypeCombo.select(imageTypeCombo.indexOf("JPEG")); imageTypeCombo.addSelectionListener(widgetSelectedAdapter(event -> { int index = imageTypeCombo.getSelectionIndex(); switch (index) { case 0: compressionCombo.setEnabled(true); compressionRatioLabel.setEnabled(true); if (compressionCombo.getItemCount() == 100) break; compressionCombo.removeAll(); for (int i = 0; i < 100; i++) { compressionCombo.add(String.valueOf(i + 1)); } compressionCombo.select(compressionCombo.indexOf("75")); break; case 1: compressionCombo.setEnabled(true); compressionRatioLabel.setEnabled(true); if (compressionCombo.getItemCount() == 10) break; compressionCombo.removeAll(); for (int i = 0; i < 4; i++) { compressionCombo.add(String.valueOf(i)); } compressionCombo.select(0); break; case 2: case 3: case 4: case 5: compressionCombo.setEnabled(false); compressionRatioLabel.setEnabled(false); break; } })); imageTypeCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); compressionRatioLabel = new Label(group, SWT.NONE); compressionRatioLabel.setText(bundle.getString("Compression")); compressionRatioLabel.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false)); compressionCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); for (int i = 0; i < 100; i++) { compressionCombo.add(String.valueOf(i + 1)); } compressionCombo.select(compressionCombo.indexOf("75")); compressionCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); // Combo to change the x scale. String[] values = { "0.1", "0.2", "0.3", "0.4", "0.5", "0.6", "0.7", "0.8", "0.9", "1", "1.1", "1.2", "1.3", "1.4", "1.5", "1.6", "1.7", "1.8", "1.9", "2", "3", "4", "5", "6", "7", "8", "9", "10", }; group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("X_scale")); scaleXCombo = new Combo(group, SWT.DROP_DOWN); for (String value : values) { scaleXCombo.add(value); } scaleXCombo.select(scaleXCombo.indexOf("1")); scaleXCombo.addSelectionListener(widgetSelectedAdapter(event -> scaleX())); // Combo to change the y scale. group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("Y_scale")); scaleYCombo = new Combo(group, SWT.DROP_DOWN); for (String value : values) { scaleYCombo.add(value); } scaleYCombo.select(scaleYCombo.indexOf("1")); scaleYCombo.addSelectionListener(widgetSelectedAdapter(event -> scaleY())); // Combo to change the alpha value. group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("Alpha_K")); alphaCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); for (int i = 0; i <= 255; i += 5) { alphaCombo.add(String.valueOf(i)); } alphaCombo.select(alphaCombo.indexOf("255")); alphaCombo.addSelectionListener(widgetSelectedAdapter(event -> alpha())); // Check box to request incremental display. group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("Display")); incrementalCheck = new Button(group, SWT.CHECK); incrementalCheck.setText(bundle.getString("Incremental")); incrementalCheck.setSelection(incremental); incrementalCheck.addSelectionListener( widgetSelectedAdapter(event -> incremental = ((Button) event.widget).getSelection())); // Check box to request transparent display. transparentCheck = new Button(group, SWT.CHECK); transparentCheck.setText(bundle.getString("Transparent")); transparentCheck.setSelection(transparent); transparentCheck.addSelectionListener(widgetSelectedAdapter(event -> { transparent = ((Button) event.widget).getSelection(); if (image != null) { imageCanvas.redraw(); } })); // Check box to request mask display. maskCheck = new Button(group, SWT.CHECK); maskCheck.setText(bundle.getString("Mask")); maskCheck.setSelection(showMask); maskCheck.addSelectionListener(widgetSelectedAdapter(event -> { showMask = ((Button) event.widget).getSelection(); if (image != null) { imageCanvas.redraw(); } })); // Check box to request background display. backgroundCheck = new Button(group, SWT.CHECK); backgroundCheck.setText(bundle.getString("Background")); backgroundCheck.setSelection(showBackground); backgroundCheck.addSelectionListener( widgetSelectedAdapter(event -> showBackground = ((Button) event.widget).getSelection())); // Group the animation buttons. group = new Group(controls, SWT.NONE); group.setLayout(new RowLayout()); group.setText(bundle.getString("Animation")); // Push button to display the previous image in a multi-image file. previousButton = new Button(group, SWT.PUSH); previousButton.setText(bundle.getString("Previous")); previousButton.setEnabled(false); previousButton.addSelectionListener(widgetSelectedAdapter(event -> previous())); // Push button to display the next image in a multi-image file. nextButton = new Button(group, SWT.PUSH); nextButton.setText(bundle.getString("Next")); nextButton.setEnabled(false); nextButton.addSelectionListener(widgetSelectedAdapter(event -> next())); // Push button to toggle animation of a multi-image file. animateButton = new Button(group, SWT.PUSH); animateButton.setText(bundle.getString("Animate")); animateButton.setEnabled(false); animateButton.addSelectionListener(widgetSelectedAdapter(event -> animate())); // Label to show the image file type. typeLabel = new Label(shell, SWT.NONE); typeLabel.setText(bundle.getString("Type_initial")); typeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Canvas to show the image. imageCanvas = new Canvas(shell, SWT.V_SCROLL | SWT.H_SCROLL | SWT.NO_REDRAW_RESIZE | SWT.NO_BACKGROUND); imageCanvas.setBackground(whiteColor); imageCanvas.setCursor(crossCursor); gridData = new GridData(); gridData.verticalSpan = 15; gridData.horizontalAlignment = GridData.FILL; gridData.verticalAlignment = GridData.FILL; gridData.grabExcessHorizontalSpace = true; gridData.grabExcessVerticalSpace = true; imageCanvas.setLayoutData(gridData); imageCanvas.addPaintListener(event -> { if (image == null) { Rectangle bounds = imageCanvas.getBounds(); event.gc.fillRectangle(0, 0, bounds.width, bounds.height); } else { paintImage(event); } }); imageCanvas.addMouseMoveListener(event -> { if (image != null) { showColorAt(event.x, event.y); } }); // Set up the image canvas scroll bars. ScrollBar horizontal = imageCanvas.getHorizontalBar(); horizontal.setVisible(true); horizontal.setMinimum(0); horizontal.setEnabled(false); horizontal .addSelectionListener(widgetSelectedAdapter(event -> scrollHorizontally((ScrollBar) event.widget))); ScrollBar vertical = imageCanvas.getVerticalBar(); vertical.setVisible(true); vertical.setMinimum(0); vertical.setEnabled(false); vertical.addSelectionListener(widgetSelectedAdapter(event -> scrollVertically((ScrollBar) event.widget))); // Label to show the image size. sizeLabel = new Label(shell, SWT.NONE); sizeLabel.setText(bundle.getString("Size_initial")); sizeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image depth. depthLabel = new Label(shell, SWT.NONE); depthLabel.setText(bundle.getString("Depth_initial")); depthLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the transparent pixel. transparentPixelLabel = new Label(shell, SWT.NONE); transparentPixelLabel.setText(bundle.getString("Transparent_pixel_initial")); transparentPixelLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the time to load. timeToLoadLabel = new Label(shell, SWT.NONE); timeToLoadLabel.setText(bundle.getString("Time_to_load_initial")); timeToLoadLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Separate the animation fields from the rest of the fields. Label separator = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL); separator.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the logical screen size for animation. screenSizeLabel = new Label(shell, SWT.NONE); screenSizeLabel.setText(bundle.getString("Animation_size_initial")); screenSizeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the background pixel. backgroundPixelLabel = new Label(shell, SWT.NONE); backgroundPixelLabel.setText(bundle.getString("Background_pixel_initial")); backgroundPixelLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image location (x, y). locationLabel = new Label(shell, SWT.NONE); locationLabel.setText(bundle.getString("Image_location_initial")); locationLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image disposal method. disposalMethodLabel = new Label(shell, SWT.NONE); disposalMethodLabel.setText(bundle.getString("Disposal_initial")); disposalMethodLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the image delay time. delayTimeLabel = new Label(shell, SWT.NONE); delayTimeLabel.setText(bundle.getString("Delay_initial")); delayTimeLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show the background pixel. repeatCountLabel = new Label(shell, SWT.NONE); repeatCountLabel.setText(bundle.getString("Repeats_initial")); repeatCountLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Separate the animation fields from the palette. separator = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL); separator.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Label to show if the image has a direct or indexed palette. paletteLabel = new Label(shell, SWT.NONE); paletteLabel.setText(bundle.getString("Palette_initial")); paletteLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); // Canvas to show the image's palette. paletteCanvas = new Canvas(shell, SWT.BORDER | SWT.V_SCROLL | SWT.NO_REDRAW_RESIZE); paletteCanvas.setFont(fixedWidthFont); paletteCanvas.getVerticalBar().setVisible(true); gridData = new GridData(); gridData.horizontalAlignment = GridData.FILL; gridData.verticalAlignment = GridData.FILL; GC gc = new GC(paletteLabel); paletteWidth = gc.stringExtent(bundle.getString("Max_length_string")).x; gc.dispose(); gridData.widthHint = paletteWidth; gridData.heightHint = 16 * 11; // show at least 16 colors paletteCanvas.setLayoutData(gridData); paletteCanvas.addPaintListener(event -> { if (image != null) paintPalette(event); }); // Set up the palette canvas scroll bar. vertical = paletteCanvas.getVerticalBar(); vertical.setVisible(true); vertical.setMinimum(0); vertical.setIncrement(10); vertical.setEnabled(false); vertical.addSelectionListener(widgetSelectedAdapter(event -> scrollPalette((ScrollBar) event.widget))); // Sash to see more of image or image data. sash = new Sash(shell, SWT.HORIZONTAL); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; sash.setLayoutData(gridData); sash.addSelectionListener(widgetSelectedAdapter(event -> { if (event.detail != SWT.DRAG) { ((GridData) paletteCanvas.getLayoutData()).heightHint = SWT.DEFAULT; Rectangle paletteCanvasBounds = paletteCanvas.getBounds(); int minY = paletteCanvasBounds.y + 20; Rectangle dataLabelBounds = dataLabel.getBounds(); int maxY = statusLabel.getBounds().y - dataLabelBounds.height - 20; if (event.y > minY && event.y < maxY) { Rectangle oldSash = sash.getBounds(); sash.setBounds(event.x, event.y, event.width, event.height); int diff = event.y - oldSash.y; Rectangle bounds = imageCanvas.getBounds(); imageCanvas.setBounds(bounds.x, bounds.y, bounds.width, bounds.height + diff); bounds = paletteCanvasBounds; paletteCanvas.setBounds(bounds.x, bounds.y, bounds.width, bounds.height + diff); bounds = dataLabelBounds; dataLabel.setBounds(bounds.x, bounds.y + diff, bounds.width, bounds.height); bounds = dataText.getBounds(); dataText.setBounds(bounds.x, bounds.y + diff, bounds.width, bounds.height - diff); //shell.layout(true); } } })); // Label to show data-specific fields. dataLabel = new Label(shell, SWT.NONE); dataLabel.setText(bundle.getString("Pixel_data_initial")); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; dataLabel.setLayoutData(gridData); // Text to show a dump of the data. dataText = new StyledText(shell, SWT.BORDER | SWT.MULTI | SWT.READ_ONLY | SWT.V_SCROLL | SWT.H_SCROLL); dataText.setBackground(display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND)); dataText.setFont(fixedWidthFont); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; gridData.verticalAlignment = GridData.FILL; gridData.heightHint = 128; gridData.grabExcessVerticalSpace = true; dataText.setLayoutData(gridData); dataText.addMouseListener(MouseListener.mouseDownAdapter(event -> { if (image != null && event.button == 1) { showColorForData(); } })); dataText.addKeyListener(new KeyAdapter() { @Override public void keyPressed(KeyEvent event) { if (image != null) { showColorForData(); } } }); // Label to show status and cursor location in image. statusLabel = new Label(shell, SWT.NONE); statusLabel.setText(""); gridData = new GridData(); gridData.horizontalSpan = 2; gridData.horizontalAlignment = GridData.FILL; statusLabel.setLayoutData(gridData); }
From source file:PaintExample.java
/** * Handles resize events/*w w w . j a v a 2 s . com*/ */ private void handleResize() { paintCanvas.update(); Rectangle visibleRect = paintCanvas.getClientArea(); visibleWidth = visibleRect.width; visibleHeight = visibleRect.height; ScrollBar horizontal = paintCanvas.getHorizontalBar(); if (horizontal != null) { displayFDC.xOffset = Math.min(horizontal.getSelection(), imageWidth - visibleWidth); if (imageWidth <= visibleWidth) { horizontal.setEnabled(false); horizontal.setSelection(0); } else { horizontal.setEnabled(true); horizontal.setValues(displayFDC.xOffset, 0, imageWidth, visibleWidth, 8, visibleWidth); } } ScrollBar vertical = paintCanvas.getVerticalBar(); if (vertical != null) { displayFDC.yOffset = Math.min(vertical.getSelection(), imageHeight - visibleHeight); if (imageHeight <= visibleHeight) { vertical.setEnabled(false); vertical.setSelection(0); } else { vertical.setEnabled(true); vertical.setValues(displayFDC.yOffset, 0, imageHeight, visibleHeight, 8, visibleHeight); } } }