Java ScrollBar.setSelection方法代碼示例

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
private void pageUp() {
	//
	// Ensure there's an anchor.
	//
	ensureAnchorSet();
	
	//
	// Move the scrollbar down one page.
	//
	final ScrollBar verticalBar = grid.getVerticalBar();
	verticalBar.setSelection(Math.max(verticalBar.getSelection() - verticalBar.getPageIncrement(), verticalBar.getMinimum()));
	
	//
	// Cause a repaint.
	//
	gridModel.fireChangeEvent();
	
	//
	// Move the anchor to the new page.
	//
	if (verticalBar.getSelection() != verticalBar.getMaximum()) {
		final Row<T> row = gridModel.getRows().get(grid.getViewport().getFirstRowIndex());
		gridModel.getSelectionModel().setAnchorElement(row.getElement());
	}
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
private void pageDown() {
	//
	// Ensure there's an anchor.
	//
	ensureAnchorSet();
	
	//
	// Move the scrollbar down one page.
	//
	final ScrollBar verticalBar = grid.getVerticalBar();
	verticalBar.setSelection(Math.min(verticalBar.getSelection() + verticalBar.getPageIncrement(), verticalBar.getMaximum()));
	
	//
	// Cause a repaint.
	//
	gridModel.fireChangeEvent();
	
	//
	// Move the anchor to the new page.
	//
	if (verticalBar.getSelection() != verticalBar.getMaximum()) {
		final Row<T> row = gridModel.getRows().get(grid.getViewport().getFirstRowIndex());
		gridModel.getSelectionModel().setAnchorElement(row.getElement());
	}
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
/**
 * Restores the state of the filter actions
 * @param memento the memento
 */
public void restoreState(IMemento memento) {
	fMemberFilterActionGroup.restoreState(memento);
	getControl().setRedraw(false);
	refresh();
	getControl().setRedraw(true);

	boolean showInherited= Boolean.valueOf(memento.getString(TAG_SHOWINHERITED)).booleanValue();
	showInheritedMethods(showInherited);

	boolean showDefiningTypes= Boolean.valueOf(memento.getString(TAG_SORTBYDEFININGTYPE)).booleanValue();
	sortByDefiningType(showDefiningTypes);

	ScrollBar bar= getTable().getVerticalBar();
	if (bar != null) {
		Integer vScroll= memento.getInteger(TAG_VERTICAL_SCROLL);
		if (vScroll != null) {
			bar.setSelection(vScroll.intValue());
		}
	}
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
private void scrollTable( ScrollBar widget, KeyEvent event )
{
	int newSelectionValue = widget.getSelection( );
	if ( event.keyCode == SWT.ARROW_LEFT )
	{
		newSelectionValue -= TableCanvas.SCROLL_HORIZONTAL_STEP;
	}
	else if ( event.keyCode == SWT.ARROW_RIGHT )
	{
		newSelectionValue += TableCanvas.SCROLL_HORIZONTAL_STEP;
	}
	else if ( event.keyCode == SWT.PAGE_UP 
			|| event.keyCode == SWT.ARROW_UP )
	{
		newSelectionValue -= 1;
	}
	else if ( event.keyCode == SWT.PAGE_DOWN
			|| event.keyCode == SWT.ARROW_DOWN )
	{
		newSelectionValue += 1;
	}

	if ( newSelectionValue < widget.getMinimum( ) )
	{
		newSelectionValue = widget.getMinimum( );
	}
	else if ( newSelectionValue > widget.getMaximum( ) )
	{
		newSelectionValue = widget.getMaximum( );
	}

	widget.setSelection( newSelectionValue );
	Event newEvent = new Event( );
	newEvent.widget = widget;
	newEvent.type = SWT.Selection;
	newEvent.data = event.data;
	widget.notifyListeners( SWT.Selection, newEvent );
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
public boolean moveScrollTo(TGMeasureImpl measure,ScrollBar xScroll,ScrollBar yScroll,TGRectangle area){
	boolean success = false;
	if( measure != null && measure.getTs() != null ){
		int mX = Math.round(measure.getPosX());
		int mY = Math.round(measure.getPosY());
		int mWidth = Math.round(measure.getWidth(this.tablature.getViewLayout()));
		int mHeight = Math.round(measure.getTs().getSize());
		int marginWidth = Math.round(this.tablature.getViewLayout().getFirstMeasureSpacing());
		int marginHeight = Math.round(this.tablature.getViewLayout().getFirstTrackSpacing());
		boolean forceRedraw = false;
		
		//Solo se ajusta si es necesario
		//si el largo del compas es mayor al de la pantalla. nunca se puede ajustar a la medida.
		if( mX < 0 || ( (mX + mWidth ) > area.getWidth() && (area.getWidth() >= mWidth + marginWidth || mX > marginWidth) ) ){
			xScroll.setSelection((this.scrollX + mX) - marginWidth );
			success = true;
		}
		
		//Solo se ajusta si es necesario
		//si el alto del compas es mayor al de la pantalla. nunca se puede ajustar a la medida.
		if( mY < 0 || ( (mY + mHeight ) > area.getHeight() && (area.getHeight() >= mHeight + marginHeight || mY > marginHeight) ) ){
			yScroll.setSelection( (this.scrollY + mY)  - marginHeight );
			success = true;
		}
		
		if(!success){
			// Si la seleccion "real" del scroll es distinta a la anterior, se fuerza el redraw
			forceRedraw = (this.scrollX != xScroll.getSelection() || this.scrollY != yScroll.getSelection());
		}
		
		if(forceRedraw || success){
			redraw();
		}
	}
	return success;
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
/**
 * Move the scrollbar to reflect the current visible items position.
 * 
 * @param bar
 *            - the scroll bar to move
 * @param clientSize
 *            - Client (visible) area size
 * @param totalSize
 *            - Total Size
 */
private void updateScrollBarProperties(ScrollBar bar, int clientSize,
		int totalSize) {
	if (bar == null)
		return;

	bar.setMinimum(0);
	bar.setPageIncrement(clientSize);
	bar.setMaximum(totalSize);
	bar.setThumb(clientSize);

	// Let the group renderer use a custom increment value.
	if (groupRenderer != null)
		bar.setIncrement(groupRenderer.getScrollBarIncrement());

	if (totalSize > clientSize) {
		if (DEBUG)
			System.out.println("Enabling scrollbar"); //$NON-NLS-1$

		bar.setEnabled(true);
		bar.setVisible(true);
		bar.setSelection(translate);

		// Ensure that translate has a valid value.
		validateTranslation();
	} else {
		if (DEBUG)
			System.out.println("Disabling scrollbar"); //$NON-NLS-1$

		bar.setEnabled(false);
		bar.setVisible(false);
		bar.setSelection(0);
		translate = 0;
	}

}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
private void refresh(Image reportImage, String errorMessage, JRPrintPage page) {
	if (this.reportImage != null)
		this.reportImage.dispose();
	if (isDisposed())
		return;

	this.reportImage = reportImage;
	this.errorMessage = errorMessage;
	this.page = page;

	setCursor(null);
	setToolTipText(null);
	currentLink = null;
	initHypelinks();

	ScrollBar hBar = getHorizontalBar();
	ScrollBar vBar = getVerticalBar();

	hBar.setSelection(0);
	vBar.setSelection(0);
	if (!updatingScrollbars)
		try {
			updatingScrollbars = true;
			Rectangle b = getContentBounds();

			boolean hVisible = hasHScroll(b.width, false);
			boolean vVisible = hasVScroll(b.height, hVisible);
			if (!hVisible && vVisible)
				hVisible = hasHScroll(b.width, vVisible);
			Point size = getSize();
			Rectangle clientArea = getClientArea();

			setupScrollBar(hBar, hVisible, clientArea.width, b.width, size.x);
			setupScrollBar(vBar, vVisible, clientArea.height, b.height, size.y);
		} finally {
			updatingScrollbars = false;
		}
	redraw();
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
private void setupScrollBar(ScrollBar sb, boolean visible, int ca, int b, int size) {
	if (sb == null)
		return;
	sb.setVisible(visible);
	if (!visible)
		sb.setSelection(0);
	else {
		sb.setPageIncrement(ca - sb.getIncrement());
		int max = b + size - ca;
		sb.setMaximum(max);
		sb.setThumb(size > max ? max : size);
	}
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
@Override
public void createPartControl(final Composite parent) {

	_pc = new PixelConverter(parent);

	// define all columns for the viewer
	_columnManager = new ColumnManager(this, _state);
	_columnManager.setIsCategoryAvailable(true);
	defineAllColumns(parent);

	createUI(parent);

	createActions();
	fillViewMenu();

	addPartListener();
	addPostSelectionListener();
	addTourEventListener();
	addPrefListener();

	// set selection provider
	getSite().setSelectionProvider(_postSelectionProvider = new PostSelectionProvider(ID));

	_tourViewer.setInput(_rootItem = new TVICatalogRootItem(this));

	restoreState();

	// move the horizontal scrollbar to the left border
	final ScrollBar horizontalBar = _tourViewer.getTree().getHorizontalBar();
	if (horizontalBar != null) {
		horizontalBar.setSelection(0);
	}
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
/**
 * Move the scrollbar to reflect the current visible items position.
 */
private void updateScrollBarsPropertiesHorizontal() {

	final ScrollBar bar = getHorizontalBar();

	if (bar == null) {
		return;
	}

	final int areaWidth = _clientArea.width;
	final int contentWidth = _contentVirtualWidthScrollbar;

	bar.setMinimum(0);
	bar.setMaximum(contentWidth);
	bar.setPageIncrement(areaWidth);
	bar.setThumb(areaWidth);

	bar.setIncrement(16);

	if (contentWidth > areaWidth) {

		// show scrollbar

		bar.setEnabled(true);
		bar.setVisible(true);
		bar.setSelection(_galleryPosition);

		// Ensure that translate has a valid value.
		validateGalleryPosition();

	} else {

		// hide scrollbar

		bar.setEnabled(false);
		bar.setVisible(false);
		bar.setSelection(0);
		_galleryPosition = 0;
	}
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
/**
 * Move the scrollbar to reflect the current visible items position.
 */
private void updateScrollBarsPropertiesVertical() {

	final ScrollBar bar = getVerticalBar();
	if (bar == null) {
		return;
	}

	final int clientAreaSize = _clientArea.height;
	final int contentSize = _contentVirtualHeight;

	bar.setMinimum(0);
	bar.setMaximum(contentSize);
	bar.setPageIncrement(clientAreaSize);
	bar.setThumb(clientAreaSize);

	bar.setIncrement(16);

	if (contentSize > clientAreaSize) {

		// show scrollbar

		bar.setEnabled(true);
		bar.setVisible(true);
		bar.setSelection(_galleryPosition);

		// Ensure that translate has a valid value.
		validateGalleryPosition();

	} else {

		// hide scrollbar

		bar.setEnabled(false);
		bar.setVisible(false);
		bar.setSelection(0);
		_galleryPosition = 0;
	}
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
@Override
public void handleEvent(Event event) {
	ScrollBar hBar = getHorizontalBar();
	int selection = hBar.getSelection();
	selection -= 5 * event.count;
	hBar.setSelection(selection);
	updateDaysChildren();
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
/**
 * Remove the old composites from the scrolled composite and clear the selection.
 */
private void clear() {
	Composite fillableComposite = list.getFillableComposite();
	if ((fillableComposite != null) && !fillableComposite.isDisposed()) {
		for (Control child : fillableComposite.getChildren()) {
			child.dispose();
		}
	}
	selectedLabel = null;
	ScrollBar scroll = list.getVerticalBar();
	scroll.setSelection(scroll.getMinimum());
	scroll = list.getHorizontalBar();
	scroll.setSelection(scroll.getMinimum());
	list.setMinSize(SWT.DEFAULT, SWT.DEFAULT);
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
/**
 * Reveals an item, scrolling vertically if necessary.
 * 
 * @param item Item to reveal
 */
public void reveal(DetailTreeItem item) {
	// Clear hover item
	hoverItem = null;

	// If item is not revealed
	if (!item.isRevealed()) {
		// Expand all parent items
		DetailTreeItem parent = item.getParent();
		while (parent != null) {
			parent.expand();
			parent = parent.getParent();
		}
	}
	
	ScrollBar vScrollBar = getVerticalBar();
	if (vScrollBar != null) {
		Rectangle clientArea = getClientArea();
		int itemExtent = item.getArea().y + item.getArea().height;

		// Bottom of item is below visible area
		if (itemExtent > clientArea.height) {
			scrollOffset.y += itemExtent - clientArea.height;
			vScrollBar.setSelection(scrollOffset.y);
			redraw();
		}
		// Top of item is above visible area
		else if (item.getArea().y < 0) {
			scrollOffset.y += item.getArea().y;
			vScrollBar.setSelection(scrollOffset.y);
			redraw();
		}
	}
}
 

import org.eclipse.swt.widgets.ScrollBar; //導入方法依賴的package包/類
/**
 * Set the content that will be scrolled.
 * 
 * @param content
 *            the control to be displayed in the content area
 * 
 * @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 setContent(Control content) {
	checkWidget();
	if (this.content != null && !this.content.isDisposed()) {
		this.content.removeListener(SWT.Resize, contentListener);
		this.content.setBounds(new Rectangle(-200, -200, 0, 0));
	}

	this.content = content;
	ScrollBar vBar = getVerticalBar();
	ScrollBar hBar = getHorizontalBar();
	if (this.content != null) {
		if (vBar != null) {
			vBar.setMaximum(0);
			vBar.setThumb(0);
			vBar.setSelection(0);
		}
		if (hBar != null) {
			hBar.setMaximum(0);
			hBar.setThumb(0);
			hBar.setSelection(0);
		}
		content.setLocation(0, 0);
		layout(false);
		this.content.addListener(SWT.Resize, contentListener);
	} else {
		if (hBar != null)
			hBar.setVisible(alwaysShowScroll);
		if (vBar != null)
			vBar.setVisible(alwaysShowScroll);
	}
}