Examples with Canvas org.eclipse.swt.widgets.Canvas used on opensource projects

Example 76 with Canvas

use of org.eclipse.swt.widgets.Canvas in project eclipse.platform.swt by eclipse.

the class GradientDialog method createDialogControls.

/**
 * Creates the controls of the dialog.
 */
public void createDialogControls(final Shell parent) {
    final Display display = parent.getDisplay();
    // message
    Label message = new Label(parent, SWT.NONE);
    message.setText(GraphicsExample.getResourceString("GradientDlgMsg"));
    GridData gridData = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
    gridData.horizontalSpan = 2;
    message.setLayoutData(gridData);
    // default colors are white and black
    if (rgb1 == null || rgb2 == null) {
        rgb1 = display.getSystemColor(SWT.COLOR_WHITE).getRGB();
        rgb2 = display.getSystemColor(SWT.COLOR_BLACK).getRGB();
    }
    // canvas
    canvas = new Canvas(parent, SWT.NONE);
    gridData = new GridData(GridData.FILL_BOTH);
    gridData.widthHint = 200;
    gridData.heightHint = 100;
    canvas.setLayoutData(gridData);
    canvas.addListener(SWT.Paint, e -> {
        Image preview = null;
        Point size = canvas.getSize();
        Color color1 = new Color(display, rgb1);
        Color color2 = new Color(display, rgb2);
        preview = GraphicsExample.createImage(display, color1, color2, size.x, size.y);
        if (preview != null) {
            e.gc.drawImage(preview, 0, 0);
        }
        preview.dispose();
        color1.dispose();
        color2.dispose();
    });
    // composite used for both color buttons
    Composite colorButtonComp = new Composite(parent, SWT.NONE);
    // layout buttons
    RowLayout layout = new RowLayout();
    layout.type = SWT.VERTICAL;
    layout.pack = false;
    colorButtonComp.setLayout(layout);
    // position composite
    gridData = new GridData(GridData.VERTICAL_ALIGN_BEGINNING);
    colorButtonComp.setLayoutData(gridData);
    ColorMenu colorMenu = new ColorMenu();
    // color controls: first color
    colorButton1 = new Button(colorButtonComp, SWT.PUSH);
    colorButton1.setText(GraphicsExample.getResourceString("GradientDlgButton1"));
    Color color1 = new Color(display, rgb1);
    Image img1 = GraphicsExample.createImage(display, color1);
    color1.dispose();
    colorButton1.setImage(img1);
    resources.add(img1);
    menu1 = colorMenu.createMenu(parent.getParent(), gb -> {
        rgb1 = gb.getBgColor1().getRGB();
        colorButton1.setImage(gb.getThumbNail());
        if (canvas != null)
            canvas.redraw();
    });
    colorButton1.addListener(SWT.Selection, event -> {
        final Button button = (Button) event.widget;
        final Composite parent1 = button.getParent();
        Rectangle bounds = button.getBounds();
        Point point = parent1.toDisplay(new Point(bounds.x, bounds.y));
        menu1.setLocation(point.x, point.y + bounds.height);
        menu1.setVisible(true);
    });
    // color controls: second color
    colorButton2 = new Button(colorButtonComp, SWT.PUSH);
    colorButton2.setText(GraphicsExample.getResourceString("GradientDlgButton2"));
    Color color2 = new Color(display, rgb2);
    Image img2 = GraphicsExample.createImage(display, color2);
    color2.dispose();
    colorButton2.setImage(img2);
    resources.add(img2);
    menu2 = colorMenu.createMenu(parent.getParent(), gb -> {
        rgb2 = gb.getBgColor1().getRGB();
        colorButton2.setImage(gb.getThumbNail());
        if (canvas != null)
            canvas.redraw();
    });
    colorButton2.addListener(SWT.Selection, event -> {
        final Button button = (Button) event.widget;
        final Composite parent1 = button.getParent();
        Rectangle bounds = button.getBounds();
        Point point = parent1.toDisplay(new Point(bounds.x, bounds.y));
        menu2.setLocation(point.x, point.y + bounds.height);
        menu2.setVisible(true);
    });
    // composite used for ok and cancel buttons
    Composite okCancelComp = new Composite(parent, SWT.NONE);
    // layout buttons
    RowLayout rowLayout = new RowLayout();
    rowLayout.pack = false;
    rowLayout.marginTop = 5;
    okCancelComp.setLayout(rowLayout);
    // position composite
    gridData = new GridData(GridData.HORIZONTAL_ALIGN_END);
    gridData.horizontalSpan = 2;
    okCancelComp.setLayoutData(gridData);
    // OK button
    okButton = new Button(okCancelComp, SWT.PUSH);
    okButton.setText("&OK");
    okButton.addListener(SWT.Selection, event -> {
        returnVal = SWT.OK;
        parent.close();
    });
    // cancel button
    cancelButton = new Button(okCancelComp, SWT.PUSH);
    cancelButton.setText("&Cancel");
    cancelButton.addListener(SWT.Selection, event -> parent.close());
}

Example 77 with Canvas

use of org.eclipse.swt.widgets.Canvas in project eclipse.platform.swt by eclipse.

the class GraphicsExample method createToolBar.

void createToolBar(final Composite parent) {
    final Display display = parent.getDisplay();
    toolBar = new ToolBar(parent, SWT.FLAT);
    ToolItem back = new ToolItem(toolBar, SWT.PUSH);
    // $NON-NLS-1$
    back.setText(getResourceString("Back"));
    // $NON-NLS-1$
    back.setImage(loadImage(display, "back.gif"));
    back.addListener(SWT.Selection, event -> {
        int index = tabs_in_order.indexOf(tab) - 1;
        if (index < 0)
            index = tabs_in_order.size() - 1;
        setTab(tabs_in_order.get(index));
    });
    ToolItem next = new ToolItem(toolBar, SWT.PUSH);
    // $NON-NLS-1$
    next.setText(getResourceString("Next"));
    // $NON-NLS-1$
    next.setImage(loadImage(display, "next.gif"));
    next.addListener(SWT.Selection, event -> {
        int index = (tabs_in_order.indexOf(tab) + 1) % tabs_in_order.size();
        setTab(tabs_in_order.get(index));
    });
    ColorMenu colorMenu = new ColorMenu();
    // setup items to be contained in the background menu
    colorMenu.setColorItems(true);
    colorMenu.setPatternItems(checkAdvancedGraphics());
    colorMenu.setGradientItems(checkAdvancedGraphics());
    // create the background menu
    backMenu = colorMenu.createMenu(parent, gb -> {
        background = gb;
        backItem.setImage(gb.getThumbNail());
        if (canvas != null)
            canvas.redraw();
    });
    // initialize the background to the first item in the menu
    background = (GraphicsBackground) backMenu.getItem(0).getData();
    // background tool item
    backItem = new ToolItem(toolBar, SWT.PUSH);
    // $NON-NLS-1$
    backItem.setText(getResourceString("Background"));
    backItem.setImage(background.getThumbNail());
    backItem.addListener(SWT.Selection, event -> {
        if (event.widget == backItem) {
            final ToolItem toolItem = (ToolItem) event.widget;
            final ToolBar toolBar = toolItem.getParent();
            Rectangle toolItemBounds = toolItem.getBounds();
            Point point = toolBar.toDisplay(new Point(toolItemBounds.x, toolItemBounds.y));
            backMenu.setLocation(point.x, point.y + toolItemBounds.height);
            backMenu.setVisible(true);
        }
    });
    // double buffer tool item
    dbItem = new ToolItem(toolBar, SWT.CHECK);
    // $NON-NLS-1$
    dbItem.setText(getResourceString("DoubleBuffer"));
    // $NON-NLS-1$
    dbItem.setImage(loadImage(display, "db.gif"));
    dbItem.addListener(SWT.Selection, event -> setDoubleBuffered(dbItem.getSelection()));
}

Example 78 with Canvas

use of org.eclipse.swt.widgets.Canvas in project eclipse.platform.swt by eclipse.

the class Tab method refreshLayoutComposite.

/**
 * Refreshes the composite and draws all controls
 * in the layout example.
 */
void refreshLayoutComposite() {
    /* Remove children that are already laid out */
    children = layoutComposite.getChildren();
    for (Control child : children) {
        child.dispose();
    }
    /* Add all children listed in the table */
    TableItem[] items = table.getItems();
    children = new Control[items.length];
    String[] itemValues = new String[] { LayoutExample.getResourceString("Item", new String[] { "1" }), LayoutExample.getResourceString("Item", new String[] { "2" }), LayoutExample.getResourceString("Item", new String[] { "3" }) };
    for (int i = 0; i < items.length; i++) {
        String control = items[i].getText(1);
        String controlName = items[i].getText(0);
        if (control.equals("Button")) {
            Button button = new Button(layoutComposite, SWT.PUSH);
            button.setText(controlName);
            children[i] = button;
        } else if (control.equals("Canvas")) {
            Canvas canvas = new Canvas(layoutComposite, SWT.BORDER);
            children[i] = canvas;
        } else if (control.equals("Combo")) {
            Combo combo = new Combo(layoutComposite, SWT.NONE);
            combo.setItems(itemValues);
            combo.setText(controlName);
            children[i] = combo;
        } else if (control.equals("Composite")) {
            Composite composite = new Composite(layoutComposite, SWT.BORDER);
            children[i] = composite;
        } else if (control.equals("CoolBar")) {
            CoolBar coolBar = new CoolBar(layoutComposite, SWT.NONE);
            ToolBar toolBar = new ToolBar(coolBar, SWT.BORDER);
            ToolItem item = new ToolItem(toolBar, 0);
            item.setText(LayoutExample.getResourceString("Item", new String[] { "1" }));
            item = new ToolItem(toolBar, 0);
            item.setText(LayoutExample.getResourceString("Item", new String[] { "2" }));
            CoolItem coolItem1 = new CoolItem(coolBar, 0);
            coolItem1.setControl(toolBar);
            toolBar = new ToolBar(coolBar, SWT.BORDER);
            item = new ToolItem(toolBar, 0);
            item.setText(LayoutExample.getResourceString("Item", new String[] { "3" }));
            item = new ToolItem(toolBar, 0);
            item.setText(LayoutExample.getResourceString("Item", new String[] { "4" }));
            CoolItem coolItem2 = new CoolItem(coolBar, 0);
            coolItem2.setControl(toolBar);
            Point size = toolBar.computeSize(SWT.DEFAULT, SWT.DEFAULT);
            coolItem1.setSize(coolItem1.computeSize(size.x, size.y));
            coolItem2.setSize(coolItem2.computeSize(size.x, size.y));
            coolBar.setSize(coolBar.computeSize(SWT.DEFAULT, SWT.DEFAULT));
            children[i] = coolBar;
        } else if (control.equals("Group")) {
            Group group = new Group(layoutComposite, SWT.NONE);
            group.setText(controlName);
            children[i] = group;
        } else if (control.equals("Label")) {
            Label label = new Label(layoutComposite, SWT.NONE);
            label.setText(controlName);
            children[i] = label;
        } else if (control.equals("Link")) {
            Link link = new Link(layoutComposite, SWT.NONE);
            link.setText(controlName);
            children[i] = link;
        } else if (control.equals("List")) {
            org.eclipse.swt.widgets.List list = new org.eclipse.swt.widgets.List(layoutComposite, SWT.BORDER);
            list.setItems(itemValues);
            children[i] = list;
        } else if (control.equals("ProgressBar")) {
            ProgressBar progress = new ProgressBar(layoutComposite, SWT.NONE);
            progress.setSelection(50);
            children[i] = progress;
        } else if (control.equals("Scale")) {
            Scale scale = new Scale(layoutComposite, SWT.NONE);
            children[i] = scale;
        } else if (control.equals("Slider")) {
            Slider slider = new Slider(layoutComposite, SWT.NONE);
            children[i] = slider;
        } else if (control.equals("StyledText")) {
            StyledText styledText = new StyledText(layoutComposite, SWT.MULTI | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
            styledText.setText(controlName);
            children[i] = styledText;
        } else if (control.equals("Table")) {
            Table table = new Table(layoutComposite, SWT.BORDER);
            table.setLinesVisible(true);
            TableItem item1 = new TableItem(table, 0);
            item1.setText(LayoutExample.getResourceString("Item", new String[] { "1" }));
            TableItem item2 = new TableItem(table, 0);
            item2.setText(LayoutExample.getResourceString("Item", new String[] { "2" }));
            children[i] = table;
        } else if (control.equals("Text")) {
            Text text = new Text(layoutComposite, SWT.BORDER);
            text.setText(controlName);
            children[i] = text;
        } else if (control.equals("ToolBar")) {
            ToolBar toolBar = new ToolBar(layoutComposite, SWT.BORDER);
            ToolItem item1 = new ToolItem(toolBar, 0);
            item1.setText(LayoutExample.getResourceString("Item", new String[] { "1" }));
            ToolItem item2 = new ToolItem(toolBar, 0);
            item2.setText(LayoutExample.getResourceString("Item", new String[] { "2" }));
            children[i] = toolBar;
        } else {
            Tree tree = new Tree(layoutComposite, SWT.BORDER);
            TreeItem item1 = new TreeItem(tree, 0);
            item1.setText(LayoutExample.getResourceString("Item", new String[] { "1" }));
            TreeItem item2 = new TreeItem(tree, 0);
            item2.setText(LayoutExample.getResourceString("Item", new String[] { "2" }));
            children[i] = tree;
        }
    }
}

Example 79 with Canvas

use of org.eclipse.swt.widgets.Canvas in project eclipse.platform.swt by eclipse.

the class Bug421127_Clipping_is_wrong method showCaseClipping.

private static Composite[] showCaseClipping(Composite main) {
    Composite composite = new Composite(main, SWT.NONE);
    composite.setLayout(new FillLayout());
    Composite left = new Composite(composite, SWT.NONE);
    left.setLayout(new FillLayout(SWT.VERTICAL));
    Composite upperLeft = new Composite(left, SWT.BORDER);
    Composite bottomLeft = new Composite(left, SWT.BORDER);
    Composite right = new Composite(composite, SWT.NONE);
    right.setLayout(new FillLayout(SWT.VERTICAL));
    Composite upperRight = new Composite(right, SWT.BORDER);
    Composite bottomRight = new Composite(right, SWT.BORDER);
    Composite[] squares = { upperLeft, bottomLeft, upperRight, bottomRight };
    for (Composite square : squares) {
        square.setLayout(new FillLayout(SWT.VERTICAL));
        final Canvas canvas = new Canvas(square, SWT.BORDER);
        final Canvas text = new Canvas(square, SWT.BORDER);
        class PaintCanvas implements PaintListener {

            @Override
            public void paintControl(PaintEvent event) {
                paintCanvas(event, canvas);
            }
        }
        class PrintClipping implements PaintListener {

            @Override
            public void paintControl(PaintEvent event) {
                clippingText(event, text);
            }
        }
        canvas.addPaintListener(new PaintCanvas());
        text.addPaintListener(new PrintClipping());
    }
    return squares;
}

Example 80 with Canvas

use of org.eclipse.swt.widgets.Canvas in project eclipse.platform.swt by eclipse.

the class Bug531667_CanvasPrint_does_not_work method canvas.

private static Composite canvas(Display display, Shell shell) {
    Composite composite = new Composite(shell, SWT.NONE);
    composite.setLayout(new FillLayout());
    Canvas canvas = new Canvas(composite, SWT.NONE);
    canvas.setBackground(display.getSystemColor(SWT.COLOR_BLACK));
    Color white = display.getSystemColor(SWT.COLOR_WHITE);
    canvas.addPaintListener(e -> {
        Rectangle clientArea = canvas.getClientArea();
        e.gc.setBackground(white);
        e.gc.fillOval(0, 0, clientArea.width, clientArea.height);
    });
    return composite;
}