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

Example 51 with ScrollBar

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

the class CTable method removeAll.

/**
 * Removes all of the items from the receiver.
 *
 * @exception SWTException <ul>
 *    <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);
}

Example 52 with ScrollBar

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

the class CTable method updateHorizontalBar.

/*
 * Update the horizontal bar, if needed, in response to an item change (eg.- created,
 * disposed, expanded, etc.).  newRightX is the new rightmost X value of the item,
 * and rightXchange is the change that led to the item's rightmost X value becoming
 * newRightX (so oldRightX + rightXchange = newRightX)
 */
void updateHorizontalBar(int newRightX, int rightXchange) {
    if (drawCount > 0)
        return;
    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 */
}

Example 53 with ScrollBar

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

the class CTable method updateColumnWidth.

void updateColumnWidth(CTableColumn column, int width) {
    headerHideToolTip();
    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 */
}

Example 54 with ScrollBar

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

the class ClipboardExample method createImageTransfer.

void createImageTransfer(Composite copyParent, Composite pasteParent) {
    final Image[] copyImage = new Image[] { null };
    Label l = new Label(copyParent, SWT.NONE);
    // $NON-NLS-1$
    l.setText("ImageTransfer:");
    GridData data = new GridData();
    data.verticalSpan = 2;
    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");
        }
    }));
}

Example 55 with ScrollBar

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

the class CTable method onScrollHorizontal.

void onScrollHorizontal(Event event) {
    ScrollBar hBar = getHorizontalBar();
    if (hBar == null)
        return;
    int newSelection = hBar.getSelection();
    update();
    if (itemsCount > 0) {
        GC gc = new GC(this);
        gc.copyArea(0, 0, clientArea.width, clientArea.height, horizontalOffset - newSelection, 0);
        gc.dispose();
    } else {
        redraw();
    /* ensure that static focus rectangle updates properly */
    }
    if (drawCount <= 0 && header.isVisible()) {
        header.update();
        Rectangle headerClientArea = header.getClientArea();
        GC gc = new GC(header);
        gc.copyArea(0, 0, headerClientArea.width, headerClientArea.height, horizontalOffset - newSelection, 0);
        gc.dispose();
    }
    horizontalOffset = newSelection;
}