Examples with Region org.eclipse.swt.graphics.Region used on opensource projects

Example 6 with Region

use of org.eclipse.swt.graphics.Region in project eclipse.platform.swt by eclipse.

the class Bug529126_TreeMouseDown method main.

// Static =================================================================
public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setText("Custom gradient selection for Tree");
    shell.setLayout(new FillLayout());
    final Tree tree = new Tree(shell, SWT.MULTI | SWT.FULL_SELECTION | SWT.VIRTUAL);
    tree.setHeaderVisible(true);
    tree.setLinesVisible(true);
    final int columnCount = 4;
    for (int i = 0; i < columnCount; i++) {
        final TreeColumn column = new TreeColumn(tree, SWT.NONE);
        column.setText("Column " + i);
    }
    final int itemCount = 5;
    for (int i = 0; i < itemCount; i++) {
        final TreeItem item1 = new TreeItem(tree, SWT.NONE);
        for (int j = 0; j < i; j++) {
            final TreeItem item2 = new TreeItem(item1, SWT.NONE);
            for (int k = 0; k < j; k++) {
                new TreeItem(item2, SWT.NONE);
            }
        }
    }
    tree.addListener(SWT.SetData, event -> {
        final TreeItem item = (TreeItem) event.item;
        final TreeItem parentItem = item.getParentItem();
        final String text;
        if (parentItem != null) {
            final String parentText = (String) parentItem.getData();
            text = parentText + event.index + "/";
        } else {
            text = "/";
        }
        item.setData(text);
    });
    tree.addListener(SWT.PaintItem, event -> {
        final TreeItem item = (TreeItem) event.item;
        final String text = (String) item.getData();
        event.gc.drawText(text + " [" + event.index + "]", event.x, event.y, true);
    });
    /*
		 * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly.
		 * Therefore, it is critical for performance that these methods be
		 * as efficient as possible.
		 */
    tree.addListener(SWT.EraseItem, event -> {
        event.detail &= ~SWT.HOT;
        if ((event.detail & SWT.SELECTED) != 0) {
            final GC gc = event.gc;
            final Rectangle area = tree.getClientArea();
            /*
				 * If you wish to paint the selection beyond the end of
				 * last column, you must change the clipping region.
				 */
            final int columnCount1 = tree.getColumnCount();
            if (event.index == columnCount1 - 1 || columnCount1 == 0) {
                final int width = area.x + area.width - event.x;
                if (width > 0) {
                    final Region region = new Region();
                    gc.getClipping(region);
                    region.add(event.x, event.y, width, event.height);
                    gc.setClipping(region);
                    region.dispose();
                }
            }
            gc.setAdvanced(true);
            if (gc.getAdvanced()) {
                gc.setAlpha(127);
            }
            final Rectangle rect = event.getBounds();
            final Color foreground = gc.getForeground();
            final Color background = gc.getBackground();
            gc.setForeground(display.getSystemColor(SWT.COLOR_RED));
            gc.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND));
            gc.fillGradientRectangle(0, rect.y, 500, rect.height, false);
            // restore colors for subsequent drawing
            gc.setForeground(foreground);
            gc.setBackground(background);
            event.detail &= ~SWT.SELECTED;
        }
    });
    tree.getColumn(0).setWidth(200);
    for (int i = 1; i < columnCount; i++) {
        tree.getColumn(i).pack();
    }
    tree.setSelection(tree.getItem(0));
    tree.addListener(SWT.MouseDown, event -> System.out.println("event = " + event));
    shell.setSize(500, 500);
    shell.open();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch()) {
            display.sleep();
        }
    }
    display.dispose();
}

Example 7 with Region

use of org.eclipse.swt.graphics.Region in project eclipse.platform.swt by eclipse.

the class PaintSurface method hideRubberband.

/**
 * Hides the rubberband (but does not eliminate it).
 * <p>
 * Increments by one the rubberband "hide" nesting count.  The rubberband
 * is hidden from view (but remains active) if it wasn't already hidden.
 * </p>
 */
public void hideRubberband() {
    if (rubberbandHiddenNestingCount++ <= 0) {
        Region region = new Region();
        rubberband.addDamagedRegion(displayFDC, region);
        Rectangle r = region.getBounds();
        paintCanvas.redraw(r.x, r.y, r.width, r.height, true);
        region.dispose();
    }
}

Example 8 with Region

use of org.eclipse.swt.graphics.Region in project eclipse.platform.swt by eclipse.

the class Test_org_eclipse_swt_graphics_Region method test_subtract$I.

@Test
public void test_subtract$I() {
    Region reg = new Region(display);
    try {
        reg.subtract((int[]) null);
        reg.dispose();
        fail("no exception thrown for subtract a null array");
    } catch (IllegalArgumentException e) {
    }
    reg.dispose();
    try {
        reg.subtract(new int[] {});
        reg.dispose();
        fail("no exception thrown on disposed region");
    } catch (SWTException e) {
    }
    reg.dispose();
    reg = new Region(display);
    reg.add(new int[] { 0, 0, 50, 0, 50, 25, 0, 25 });
    reg.subtract(new int[] { 0, 0, 50, 0, 50, 20, 0, 20 });
    Rectangle box = reg.getBounds();
    reg.dispose();
    Rectangle expected = new Rectangle(0, 20, 50, 5);
    if (!box.equals(expected)) {
        fail("subtract 1 failed - expected: " + expected + " actual: " + box);
    }
    reg = new Region(display);
    reg.add(new int[] { 0, 0, 50, 0, 50, 25, 0, 25 });
    reg.add(new int[] { 0, 25, 50, 25, 50, 40, 0, 40 });
    reg.subtract(new int[] { 0, 25, 50, 25, 50, 40, 0, 40 });
    box = reg.getBounds();
    reg.dispose();
    expected = new Rectangle(0, 0, 50, 25);
    if (!box.equals(expected)) {
        fail("subtract 2 failed - expected: " + expected + " actual: " + box);
    }
}

Example 9 with Region

use of org.eclipse.swt.graphics.Region in project eclipse.platform.swt by eclipse.

the class Test_org_eclipse_swt_graphics_Region method test_isEmpty.

@Test
public void test_isEmpty() {
    Region reg = new Region(display);
    Rectangle emptyRect1 = new Rectangle(10, 20, 0, 200);
    Rectangle emptyRect2 = new Rectangle(10, 20, 10, 0);
    Rectangle rect = new Rectangle(10, 20, 50, 100);
    if (!reg.isEmpty()) {
        reg.dispose();
        fail("isEmpty didn't return true on empty region");
    }
    reg.add(emptyRect1);
    if (!reg.isEmpty()) {
        reg.dispose();
        fail("isEmpty didn't return true on empty region");
    }
    reg.add(emptyRect2);
    if (!reg.isEmpty()) {
        reg.dispose();
        fail("isEmpty didn't return true on empty region");
    }
    reg.add(rect);
    if (reg.isEmpty()) {
        reg.dispose();
        fail("isEmpty returned true on non empty region");
    }
    reg.dispose();
}

Example 10 with Region

use of org.eclipse.swt.graphics.Region in project eclipse.platform.swt by eclipse.

the class Test_org_eclipse_swt_graphics_Region method test_add$I.

@Test
public void test_add$I() {
    Region reg = new Region(display);
    try {
        reg.add((int[]) null);
        reg.dispose();
        fail("no exception thrown for adding a null rectangle");
    } catch (IllegalArgumentException e) {
    }
    reg.dispose();
    try {
        reg.add(new int[] {});
        reg.dispose();
        fail("no exception thrown on disposed region");
    } catch (SWTException e) {
    }
    reg.dispose();
    reg = new Region(display);
    reg.add(new int[] { 0, 0, 50, 0, 50, 25, 0, 25 });
    Rectangle box = reg.getBounds();
    reg.dispose();
    Rectangle expected = new Rectangle(0, 0, 50, 25);
    if (!box.equals(expected)) {
        fail("add 1 failed - expected: " + expected + " actual: " + box);
    }
    reg = new Region(display);
    reg.add(new int[] { 0, 0, 50, 0, 50, 25, 0, 25 });
    reg.add(new int[] { 0, 25, 50, 25, 50, 40, 0, 40 });
    box = reg.getBounds();
    reg.dispose();
    expected = new Rectangle(0, 0, 50, 40);
    if (!box.equals(expected)) {
        fail("add 2 failed - expected: " + expected + " actual: " + box);
    }
// reg = new Region(display);
// reg.add(new int[] {10,10, 40,30, 20,60, 5,55});
// box = reg.getBounds();
// reg.dispose();
// expected = new Rectangle (5,10,35,50);
// if (!box.equals(expected)) {
// fail("add 3 failed - expected: "+expected+" actual: "+box);
// }
}