List of usage examples for org.eclipse.swt.widgets ScrollBar setVisible
public void setVisible(boolean visible)
true, and marks it invisible otherwise. From source file:org.eclipse.swt.examples.paint.PaintSurface.java
/** * Constructs a PaintSurface./* ww w . ja va2 s . c om*/ * <p> * paintCanvas must have SWT.NO_REDRAW_RESIZE and SWT.NO_BACKGROUND styles, * and may have SWT.V_SCROLL and/or SWT.H_SCROLL. * </p> * @param paintCanvas the Canvas object in which to render * @param paintStatus the PaintStatus object to use for providing user feedback * @param fillColor the color to fill the canvas with initially */ public PaintSurface(Canvas paintCanvas, Text statusText, Color fillColor) { this.paintCanvas = paintCanvas; this.statusText = statusText; clearStatus(); /* Set up the drawing surface */ Rectangle displayRect = paintCanvas.getDisplay().getClientArea(); imageWidth = displayRect.width; imageHeight = displayRect.height; image = new Image(paintCanvas.getDisplay(), imageWidth, imageHeight); imageFDC.gc = new GC(image); imageFDC.gc.setBackground(fillColor); imageFDC.gc.fillRectangle(0, 0, imageWidth, imageHeight); displayFDC.gc = new GC(paintCanvas); /* Initialize the session */ setPaintSession(null); /* Add our listeners */ paintCanvas.addDisposeListener(e -> displayFDC.gc.dispose()); paintCanvas.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent event) { processMouseEventCoordinates(event); if (paintSession != null) paintSession.mouseDown(event); } @Override public void mouseUp(MouseEvent event) { processMouseEventCoordinates(event); if (paintSession != null) paintSession.mouseUp(event); } @Override public void mouseDoubleClick(MouseEvent event) { processMouseEventCoordinates(event); if (paintSession != null) paintSession.mouseDoubleClick(event); } }); paintCanvas.addMouseMoveListener(event -> { processMouseEventCoordinates(event); if (paintSession != null) paintSession.mouseMove(event); }); paintCanvas.addPaintListener(event -> { if (rubberband.isEmpty()) { // Nothing to merge, so we just refresh event.gc.drawImage(image, displayFDC.xOffset + event.x, displayFDC.yOffset + event.y, event.width, event.height, event.x, event.y, event.width, event.height); } else { /* * Avoid flicker when merging overlayed objects by constructing the image on * a backbuffer first, then blitting it to the screen. */ // Check that the backbuffer is large enough if (paintImage != null) { Rectangle rect1 = paintImage.getBounds(); if ((event.width + event.x > rect1.width) || (event.height + event.y > rect1.height)) { paintFDC.gc.dispose(); paintImage.dispose(); paintImage = null; } } if (paintImage == null) { Display display = getDisplay(); Rectangle rect2 = display.getClientArea(); paintImage = new Image(display, Math.max(rect2.width, event.width + event.x), Math.max(rect2.height, event.height + event.y)); paintFDC.gc = new GC(paintImage); } // Setup clipping and the FDC Region clipRegion = new Region(); event.gc.getClipping(clipRegion); paintFDC.gc.setClipping(clipRegion); clipRegion.dispose(); paintFDC.xOffset = displayFDC.xOffset; paintFDC.yOffset = displayFDC.yOffset; paintFDC.xScale = displayFDC.xScale; paintFDC.yScale = displayFDC.yScale; // Merge the overlayed objects into the image, then blit paintFDC.gc.drawImage(image, displayFDC.xOffset + event.x, displayFDC.yOffset + event.y, event.width, event.height, event.x, event.y, event.width, event.height); rubberband.draw(paintFDC); event.gc.drawImage(paintImage, event.x, event.y, event.width, event.height, event.x, event.y, event.width, event.height); } }); paintCanvas.addControlListener(ControlListener.controlResizedAdapter(e -> handleResize())); /* Set up the paint canvas scroll bars */ ScrollBar horizontal = paintCanvas.getHorizontalBar(); horizontal.setVisible(true); horizontal .addSelectionListener(widgetSelectedAdapter(event -> scrollHorizontally((ScrollBar) event.widget))); ScrollBar vertical = paintCanvas.getVerticalBar(); vertical.setVisible(true); vertical.addSelectionListener(widgetSelectedAdapter(event -> scrollVertically((ScrollBar) event.widget))); handleResize(); }
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 w w .ja v a 2 s . c o m*/ 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 createWidgets() { // Add the widgets to the shell in a grid layout. GridLayout layout = new GridLayout(); layout.marginHeight = 0;// w ww . j a 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
/** * Constructs a PaintSurface.//from w w w . j a va2 s . c o m * <p> * paintCanvas must have SWT.NO_REDRAW_RESIZE and SWT.NO_BACKGROUND styles, * and may have SWT.V_SCROLL and/or SWT.H_SCROLL. * </p> * @param paintCanvas the Canvas object in which to render * @param paintStatus the PaintStatus object to use for providing user feedback * @param fillColor the color to fill the canvas with initially */ public PaintSurface(Canvas paintCanvas, Text statusText, Color fillColor) { this.paintCanvas = paintCanvas; this.statusText = statusText; clearStatus(); /* Set up the drawing surface */ Rectangle displayRect = paintCanvas.getDisplay().getClientArea(); imageWidth = displayRect.width; imageHeight = displayRect.height; image = new Image(paintCanvas.getDisplay(), imageWidth, imageHeight); imageFDC.gc = new GC(image); imageFDC.gc.setBackground(fillColor); imageFDC.gc.fillRectangle(0, 0, imageWidth, imageHeight); displayFDC.gc = new GC(paintCanvas); /* Initialize the session */ setPaintSession(null); /* Add our listeners */ paintCanvas.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { displayFDC.gc.dispose(); } }); paintCanvas.addMouseListener(new MouseAdapter() { public void mouseDown(MouseEvent event) { processMouseEventCoordinates(event); if (paintSession != null) paintSession.mouseDown(event); } public void mouseUp(MouseEvent event) { processMouseEventCoordinates(event); if (paintSession != null) paintSession.mouseUp(event); } public void mouseDoubleClick(MouseEvent event) { processMouseEventCoordinates(event); if (paintSession != null) paintSession.mouseDoubleClick(event); } }); paintCanvas.addMouseMoveListener(new MouseMoveListener() { public void mouseMove(MouseEvent event) { processMouseEventCoordinates(event); if (paintSession != null) paintSession.mouseMove(event); } }); paintCanvas.addPaintListener(new PaintListener() { public void paintControl(PaintEvent event) { if (rubberband.isEmpty()) { // Nothing to merge, so we just refresh event.gc.drawImage(image, displayFDC.xOffset + event.x, displayFDC.yOffset + event.y, event.width, event.height, event.x, event.y, event.width, event.height); } else { /* * Avoid flicker when merging overlayed objects by constructing the image on * a backbuffer first, then blitting it to the screen. */ // Check that the backbuffer is large enough if (paintImage != null) { Rectangle rect = paintImage.getBounds(); if ((event.width + event.x > rect.width) || (event.height + event.y > rect.height)) { paintFDC.gc.dispose(); paintImage.dispose(); paintImage = null; } } if (paintImage == null) { Display display = getDisplay(); Rectangle rect = display.getClientArea(); paintImage = new Image(display, Math.max(rect.width, event.width + event.x), Math.max(rect.height, event.height + event.y)); paintFDC.gc = new GC(paintImage); } // Setup clipping and the FDC Region clipRegion = new Region(); event.gc.getClipping(clipRegion); paintFDC.gc.setClipping(clipRegion); clipRegion.dispose(); paintFDC.xOffset = displayFDC.xOffset; paintFDC.yOffset = displayFDC.yOffset; paintFDC.xScale = displayFDC.xScale; paintFDC.yScale = displayFDC.yScale; // Merge the overlayed objects into the image, then blit paintFDC.gc.drawImage(image, displayFDC.xOffset + event.x, displayFDC.yOffset + event.y, event.width, event.height, event.x, event.y, event.width, event.height); rubberband.draw(paintFDC); event.gc.drawImage(paintImage, event.x, event.y, event.width, event.height, event.x, event.y, event.width, event.height); } } }); paintCanvas.addControlListener(new ControlAdapter() { public void controlResized(ControlEvent event) { handleResize(); } }); /* Set up the paint canvas scroll bars */ ScrollBar horizontal = paintCanvas.getHorizontalBar(); horizontal.setVisible(true); horizontal.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { scrollHorizontally((ScrollBar) event.widget); } }); ScrollBar vertical = paintCanvas.getVerticalBar(); vertical.setVisible(true); vertical.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { scrollVertically((ScrollBar) event.widget); } }); handleResize(); }
From source file:org.eclipse.swt.examples.accessibility.CTable.java
/** * Removes all of the items from the receiver. * * @exception SWTException <ul>//from w w w. j a v a2 s. c o m * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> * </ul> */ public void removeAll() { checkWidget(); if (itemsCount == 0) return; setRedraw(false); setFocusItem(null, false); for (int i = 0; i < itemsCount; i++) { items[i].dispose(false); } items = new CTableItem[0]; selectedItems = new CTableItem[0]; int oldCount = itemsCount; itemsCount = topIndex = 0; anchorItem = lastClickedItem = null; lastSelectionEvent = null; int[] eventData = new int[5]; eventData[0] = ACC.DELETE; eventData[1] = 0; eventData[2] = oldCount; eventData[3] = 0; eventData[4] = 0; getAccessible().sendEvent(ACC.EVENT_TABLE_CHANGED, eventData); ScrollBar vBar = getVerticalBar(); if (vBar != null) { vBar.setMaximum(1); vBar.setVisible(false); } if (columns.length == 0) { horizontalOffset = 0; ScrollBar hBar = getHorizontalBar(); if (hBar != null) { hBar.setMaximum(1); hBar.setVisible(false); } } setRedraw(true); }
From source file:org.eclipse.swt.examples.accessibility.CTable.java
/** * Constructs a new instance of this class given its parent * and a style value describing its behavior and appearance. * <p>/*from w ww . j a va2 s. com*/ * The style value is either one of the style constants defined in * class <code>SWT</code> which is applicable to instances of this * class, or must be built by <em>bitwise OR</em>'ing together * (that is, using the <code>int</code> "|" operator) two or more * of those <code>SWT</code> style constants. The class description * lists the style constants that are applicable to the class. * Style bits are also inherited from superclasses. * </p> * * @param parent a composite control which will be the parent of the new instance (cannot be null) * @param style the style of control to construct * * @exception IllegalArgumentException <ul> * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> * </ul> * @exception SWTException <ul> * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> * </ul> * * @see SWT#SINGLE * @see SWT#MULTI * @see SWT#CHECK * @see SWT#FULL_SELECTION * @see SWT#HIDE_SELECTION * @see SWT#VIRTUAL * @see SWT#NO_SCROLL * @see Widget#checkSubclass * @see Widget#getStyle */ public CTable(Composite parent, int style) { super(parent, checkStyle(style)); this.display = parent.getDisplay(); setForeground(null); /* set foreground and background to chosen default colors */ setBackground(null); GC gc = new GC(this); fontHeight = gc.getFontMetrics().getHeight(); gc.dispose(); itemHeight = fontHeight + (2 * getCellPadding()); initImages(display); checkboxBounds = getUncheckedImage().getBounds(); arrowBounds = getArrowDownImage().getBounds(); clientArea = getClientArea(); Listener listener = event -> handleEvents(event); addListener(SWT.Paint, listener); addListener(SWT.MouseDown, listener); addListener(SWT.MouseUp, listener); addListener(SWT.MouseDoubleClick, listener); addListener(SWT.Dispose, listener); addListener(SWT.Resize, listener); addListener(SWT.KeyDown, listener); addListener(SWT.FocusOut, listener); addListener(SWT.FocusIn, listener); addListener(SWT.Traverse, listener); initAccessibility(); header = new Canvas(this, SWT.NO_REDRAW_RESIZE | SWT.NO_FOCUS); header.setVisible(false); header.setBounds(0, 0, 0, fontHeight + 2 * getHeaderPadding()); header.addListener(SWT.Paint, listener); header.addListener(SWT.MouseDown, listener); header.addListener(SWT.MouseUp, listener); header.addListener(SWT.MouseHover, listener); header.addListener(SWT.MouseDoubleClick, listener); header.addListener(SWT.MouseMove, listener); header.addListener(SWT.MouseExit, listener); header.addListener(SWT.MenuDetect, listener); toolTipListener = event -> { switch (event.type) { case SWT.MouseHover: case SWT.MouseMove: if (headerUpdateToolTip(event.x)) break; // FALL THROUGH case SWT.MouseExit: case SWT.MouseDown: headerHideToolTip(); break; } }; ScrollBar hBar = getHorizontalBar(); if (hBar != null) { hBar.setValues(0, 0, 1, 1, 1, 1); hBar.setVisible(false); hBar.addListener(SWT.Selection, listener); } ScrollBar vBar = getVerticalBar(); if (vBar != null) { vBar.setValues(0, 0, 1, 1, 1, 1); vBar.setVisible(false); vBar.addListener(SWT.Selection, listener); } }
From source file:org.eclipse.swt.examples.accessibility.CTable.java
void destroyItem(CTableColumn column) { headerHideToolTip();/*from w w w.java2 s .co m*/ int index = column.getIndex(); int orderedIndex = column.getOrderIndex(); CTableColumn[] newColumns = new CTableColumn[columns.length - 1]; System.arraycopy(columns, 0, newColumns, 0, index); System.arraycopy(columns, index + 1, newColumns, index, newColumns.length - index); columns = newColumns; if (orderedColumns != null) { if (columns.length < 2) { orderedColumns = null; } else { int removeIndex = column.getOrderIndex(); CTableColumn[] newOrderedColumns = new CTableColumn[orderedColumns.length - 1]; System.arraycopy(orderedColumns, 0, newOrderedColumns, 0, removeIndex); System.arraycopy(orderedColumns, removeIndex + 1, newOrderedColumns, removeIndex, newOrderedColumns.length - removeIndex); orderedColumns = newOrderedColumns; } } /* ensure that column 0 always has left-alignment */ if (index == 0 && columns.length > 0) { int style = columns[0].getStyle(); style |= SWT.LEFT; style &= ~(SWT.CENTER | SWT.RIGHT); columns[0].setStyle(style); } /* allow all items to update their internal structures accordingly */ for (int i = 0; i < itemsCount; i++) { items[i].removeColumn(column, index); } /* update horizontal scrollbar */ int lastColumnIndex = columns.length - 1; if (lastColumnIndex < 0) { /* no more columns */ updateHorizontalBar(); } else { int newWidth = 0; for (CTableColumn column2 : columns) { newWidth += column2.width; } ScrollBar hBar = getHorizontalBar(); if (hBar != null) { hBar.setMaximum(newWidth); hBar.setVisible(clientArea.width < newWidth); } int selection = hBar.getSelection(); if (selection != horizontalOffset) { horizontalOffset = selection; redraw(); if (header.isVisible() && drawCount <= 0) header.redraw(); } } CTableColumn[] orderedColumns = getOrderedColumns(); for (int i = orderedIndex; i < orderedColumns.length; i++) { if (!orderedColumns[i].isDisposed()) { orderedColumns[i].notifyListeners(SWT.Move, new Event()); } } int[] eventData = new int[5]; eventData[0] = ACC.DELETE; eventData[1] = 0; eventData[2] = 0; eventData[3] = index; eventData[4] = 1; getAccessible().sendEvent(ACC.EVENT_TABLE_CHANGED, eventData); if (sortColumn == column) { sortColumn = null; } }
From source file:org.eclipse.swt.examples.accessibility.CTable.java
@Override public void setFont(Font value) { checkWidget();/* ww w.jav a2s . com*/ Font oldFont = getFont(); super.setFont(value); Font font = getFont(); if (font.equals(oldFont)) return; GC gc = new GC(this); /* recompute the receiver's cached font height and item height values */ fontHeight = gc.getFontMetrics().getHeight(); setItemHeight(Math.max(fontHeight, imageHeight) + 2 * getCellPadding()); Point headerSize = header.getSize(); int newHeaderHeight = Math.max(fontHeight, headerImageHeight) + 2 * getHeaderPadding(); if (headerSize.y != newHeaderHeight) { header.setSize(headerSize.x, newHeaderHeight); } header.setFont(font); /* * Notify all columns and items of the font change so that elements that * use the receiver's font can recompute their cached string widths. */ for (CTableColumn column : columns) { column.updateFont(gc); } for (int i = 0; i < itemsCount; i++) { items[i].updateFont(gc); } gc.dispose(); if (drawCount <= 0 && header.isVisible()) header.redraw(); /* update scrollbars */ if (columns.length == 0) updateHorizontalBar(); ScrollBar vBar = getVerticalBar(); if (vBar != null) { int thumb = (clientArea.height - getHeaderHeight()) / itemHeight; vBar.setThumb(thumb); vBar.setPageIncrement(thumb); topIndex = vBar.getSelection(); vBar.setVisible(thumb < vBar.getMaximum()); } redraw(); }
From source file:org.eclipse.swt.examples.accessibility.CTable.java
void updateHorizontalBar(int newRightX, int rightXchange) { if (drawCount > 0) return;/*from w ww . j a v a 2s . com*/ ScrollBar hBar = getHorizontalBar(); if (hBar == null) return; newRightX += horizontalOffset; int barMaximum = hBar.getMaximum(); if (newRightX > barMaximum) { /* item has extended beyond previous maximum */ hBar.setMaximum(newRightX); int clientAreaWidth = clientArea.width; int thumb = Math.min(newRightX, clientAreaWidth); hBar.setThumb(thumb); hBar.setPageIncrement(thumb); hBar.setVisible(clientAreaWidth <= newRightX); return; } int previousRightX = newRightX - rightXchange; if (previousRightX != barMaximum) { /* this was not the rightmost item, so just check for client width change */ int clientAreaWidth = clientArea.width; int thumb = Math.min(barMaximum, clientAreaWidth); hBar.setThumb(thumb); hBar.setPageIncrement(thumb); hBar.setVisible(clientAreaWidth <= barMaximum); return; } updateHorizontalBar(); /* must search for the new rightmost item */ }
From source file:org.eclipse.swt.examples.accessibility.CTable.java
void updateColumnWidth(CTableColumn column, int width) { headerHideToolTip();//from w ww.ja v a 2s.c o m int oldWidth = column.width; int columnX = column.getX(); int x = columnX + oldWidth - 1; /* -1 ensures that grid line is included */ update(); GC gc = new GC(this); gc.copyArea(x, 0, clientArea.width - x, clientArea.height, columnX + width - 1, 0); /* dest x -1 offsets x's -1 above */ if (width > oldWidth) { /* column width grew */ int change = width - oldWidth + 1; /* +1 offsets x's -1 above */ /* -1/+1 below ensure that right bound of selection redraws correctly in column */ redraw(x - 1, 0, change + 1, clientArea.height, false); } else { int change = oldWidth - width + 1; /* +1 offsets x's -1 above */ redraw(clientArea.width - change, 0, change, clientArea.height, false); } /* the focus box must be repainted because its stipple may become shifted as a result of its new width */ if (focusItem != null) redrawItem(focusItem.index, true); GC headerGC = new GC(header); if (drawCount <= 0 && header.getVisible()) { Rectangle headerBounds = header.getClientArea(); header.update(); x -= 1; /* -1 ensures that full header column separator is included */ headerGC.copyArea(x, 0, headerBounds.width - x, headerBounds.height, columnX + width - 2, 0); /* dest x -2 offsets x's -1s above */ if (width > oldWidth) { /* column width grew */ int change = width - oldWidth + 2; /* +2 offsets x's -1s above */ header.redraw(x, 0, change, headerBounds.height, false); } else { int change = oldWidth - width + 2; /* +2 offsets x's -1s above */ header.redraw(headerBounds.width - change, 0, change, headerBounds.height, false); } } column.width = width; /* * Notify column and all items of column width change so that display labels * can be recomputed if needed. */ column.updateWidth(headerGC); headerGC.dispose(); for (int i = 0; i < itemsCount; i++) { items[i].updateColumnWidth(column, gc); } gc.dispose(); int maximum = 0; for (CTableColumn column2 : columns) { maximum += column2.width; } ScrollBar hBar = getHorizontalBar(); if (hBar != null) { hBar.setMaximum(Math.max(1, maximum)); /* setting a value of 0 here is ignored */ if (hBar.getThumb() != clientArea.width) { hBar.setThumb(clientArea.width); hBar.setPageIncrement(clientArea.width); } int oldHorizontalOffset = horizontalOffset; /* hBar.setVisible() can modify horizontalOffset */ hBar.setVisible(clientArea.width < maximum); int selection = hBar.getSelection(); if (selection != oldHorizontalOffset) { horizontalOffset = selection; redraw(); if (drawCount <= 0 && header.getVisible()) header.redraw(); } } column.notifyListeners(SWT.Resize, new Event()); CTableColumn[] orderedColumns = getOrderedColumns(); for (int i = column.getOrderIndex() + 1; i < orderedColumns.length; i++) { if (!orderedColumns[i].isDisposed()) { orderedColumns[i].notifyListeners(SWT.Move, new Event()); } } if (itemsCount == 0) redraw(); /* ensure that static focus rectangle updates properly */ }