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

Example 36 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;
}

Example 37 with ScrollBar

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

the class CTable method createItem.

void createItem(CTableItem item) {
    int index = item.index;
    if (itemsCount == items.length) {
        int grow = drawCount <= 0 ? 4 : Math.max(4, items.length * 3 / 2);
        CTableItem[] newItems = new CTableItem[items.length + grow];
        System.arraycopy(items, 0, newItems, 0, items.length);
        items = newItems;
    }
    if (index != itemsCount) {
        /* new item is not at end of list, so shift other items right to create space for it */
        System.arraycopy(items, index, items, index + 1, itemsCount - index);
    }
    items[index] = item;
    itemsCount++;
    /* update the index for items bumped down by this new item */
    for (int i = index + 1; i < itemsCount; i++) {
        items[i].index = i;
    }
    /* Rows were added, so notify the accessible. */
    int[] eventData = new int[5];
    eventData[0] = ACC.INSERT;
    eventData[1] = index;
    eventData[2] = 1;
    eventData[3] = 0;
    eventData[4] = 0;
    getAccessible().sendEvent(ACC.EVENT_TABLE_CHANGED, eventData);
    /* update scrollbars */
    updateVerticalBar();
    Rectangle bounds = item.getBounds(false);
    int rightX = bounds.x + bounds.width;
    updateHorizontalBar(rightX, rightX);
    /*
	 * If new item is above viewport then adjust topIndex and the vertical
	 * scrollbar so that the current viewport items will not change.
	 */
    if (item.index < topIndex) {
        topIndex++;
        ScrollBar vBar = getVerticalBar();
        if (vBar != null)
            vBar.setSelection(topIndex);
        return;
    }
    /*
	 * If this is the first item and the receiver has focus then its boundary
	 * focus ring must be removed.
	 */
    if (itemsCount == 1 && isFocusControl()) {
        focusItem = item;
        redraw();
        return;
    }
    if (item.isInViewport()) {
        redrawFromItemDownwards(index);
    }
}

Example 38 with ScrollBar

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

the class CTable method onResize.

void onResize(Event event) {
    clientArea = getClientArea();
    /* vertical scrollbar */
    ScrollBar vBar = getVerticalBar();
    if (vBar != null) {
        int clientHeight = (clientArea.height - getHeaderHeight()) / itemHeight;
        int thumb = Math.min(clientHeight, itemsCount);
        vBar.setThumb(thumb);
        vBar.setPageIncrement(thumb);
        int index = vBar.getSelection();
        if (index != topIndex) {
            topIndex = index;
            redraw();
        }
        boolean visible = clientHeight < itemsCount;
        if (visible != vBar.getVisible()) {
            vBar.setVisible(visible);
            clientArea = getClientArea();
        }
    }
    /* horizontal scrollbar */
    ScrollBar hBar = getHorizontalBar();
    if (hBar != null) {
        int hBarMaximum = hBar.getMaximum();
        int thumb = Math.min(clientArea.width, hBarMaximum);
        hBar.setThumb(thumb);
        hBar.setPageIncrement(thumb);
        horizontalOffset = hBar.getSelection();
        boolean visible = clientArea.width < hBarMaximum;
        if (visible != hBar.getVisible()) {
            hBar.setVisible(visible);
            clientArea = getClientArea();
        }
    }
    /* header */
    int headerHeight = Math.max(fontHeight, headerImageHeight) + 2 * getHeaderPadding();
    header.setSize(clientArea.width, headerHeight);
    /* if this is the focus control but there are no items then the boundary focus ring must be repainted */
    if (itemsCount == 0 && isFocusControl())
        redraw();
}

Example 39 with ScrollBar

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

the class CTable method updateVerticalBar.

void updateVerticalBar() {
    if (drawCount > 0)
        return;
    ScrollBar vBar = getVerticalBar();
    if (vBar == null)
        return;
    int pageSize = (clientArea.height - getHeaderHeight()) / itemHeight;
    int maximum = Math.max(1, itemsCount);
    /* setting a value of 0 here is ignored */
    if (maximum != vBar.getMaximum()) {
        vBar.setMaximum(maximum);
    }
    int thumb = Math.min(pageSize, maximum);
    if (thumb != vBar.getThumb()) {
        vBar.setThumb(thumb);
        vBar.setPageIncrement(thumb);
    }
    vBar.setVisible(pageSize < maximum);
    /* reclaim any space now left on the bottom */
    if (maximum < topIndex + thumb) {
        topIndex = maximum - thumb;
        vBar.setSelection(topIndex);
        redraw();
    } else {
        int selection = vBar.getSelection();
        if (selection != topIndex) {
            topIndex = selection;
            redraw();
        }
    }
}

Example 40 with ScrollBar

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

the class CTable method onArrowUp.

void onArrowUp(int stateMask) {
    if ((stateMask & (SWT.SHIFT | SWT.CTRL)) == 0) {
        /* Up Arrow with no modifiers */
        int newFocusIndex = focusItem.index - 1;
        if (newFocusIndex < 0)
            return;
        /* at top */
        CTableItem item = items[newFocusIndex];
        selectItem(item, false);
        setFocusItem(item, true);
        redrawItem(newFocusIndex, true);
        showItem(item);
        Event newEvent = new Event();
        newEvent.item = item;
        notifyListeners(SWT.Selection, newEvent);
        return;
    }
    if ((getStyle() & SWT.SINGLE) != 0) {
        if ((stateMask & SWT.CTRL) != 0) {
            /* CTRL+Up Arrow, CTRL+Shift+Up Arrow */
            if (topIndex == 0)
                return;
            /* at top */
            update();
            topIndex--;
            ScrollBar vBar = getVerticalBar();
            if (vBar != null)
                vBar.setSelection(topIndex);
            GC gc = new GC(this);
            gc.copyArea(0, 0, clientArea.width, clientArea.height, 0, itemHeight);
            gc.dispose();
            return;
        }
        /* Shift+Up Arrow */
        int newFocusIndex = focusItem.index - 1;
        if (newFocusIndex < 0)
            return;
        /* at top */
        CTableItem item = items[newFocusIndex];
        selectItem(item, false);
        setFocusItem(item, true);
        redrawItem(newFocusIndex, true);
        showItem(item);
        Event newEvent = new Event();
        newEvent.item = item;
        notifyListeners(SWT.Selection, newEvent);
        return;
    }
    /* SWT.MULTI */
    if ((stateMask & SWT.CTRL) != 0) {
        if ((stateMask & SWT.SHIFT) != 0) {
            /* CTRL+Shift+Up Arrow */
            if (topIndex == 0)
                return;
            /* at top */
            update();
            topIndex--;
            ScrollBar vBar = getVerticalBar();
            if (vBar != null)
                vBar.setSelection(topIndex);
            GC gc = new GC(this);
            gc.copyArea(0, 0, clientArea.width, clientArea.height, 0, itemHeight);
            gc.dispose();
            return;
        }
        /* CTRL+Up Arrow */
        int focusIndex = focusItem.index;
        if (focusIndex == 0)
            return;
        /* at top */
        CTableItem newFocusItem = items[focusIndex - 1];
        setFocusItem(newFocusItem, true);
        showItem(newFocusItem);
        redrawItem(newFocusItem.index, true);
        return;
    }
    /* Shift+Up Arrow */
    int newFocusIndex = focusItem.index - 1;
    if (newFocusIndex < 0)
        return;
    /* at top */
    if (anchorItem == null)
        anchorItem = focusItem;
    if (anchorItem.index < focusItem.index) {
        deselectItem(focusItem);
        redrawItem(focusItem.index, true);
    }
    CTableItem item = items[newFocusIndex];
    selectItem(item, true);
    setFocusItem(item, true);
    redrawItem(newFocusIndex, true);
    showItem(item);
    Event newEvent = new Event();
    newEvent.item = item;
    notifyListeners(SWT.Selection, newEvent);
}