| package org.eclipse.nebula.widgets.nattable.renderer.swt.layer.viewport |
| |
| import org.eclipse.nebula.widgets.nattable.core.geometry.PixelRectangle |
| import org.eclipse.nebula.widgets.nattable.core.graphics.GraphicsContext |
| import org.eclipse.nebula.widgets.nattable.core.layer.LayerPainter |
| import org.eclipse.nebula.widgets.nattable.core.layer.impl.GridLineCellLayerPainter |
| import org.eclipse.nebula.widgets.nattable.core.layer.impl.viewport.ViewportAxis |
| import org.eclipse.nebula.widgets.nattable.core.layer.impl.viewport.ViewportLayer |
| import org.eclipse.nebula.widgets.nattable.renderer.swt.graphics.SWTGraphicsContext |
| import org.eclipse.swt.SWT |
| import org.eclipse.swt.graphics.Rectangle |
| import org.eclipse.swt.widgets.Canvas |
| |
| class SWTViewportLayerPainter implements LayerPainter<ViewportLayer> { |
| |
| val defaultPainter = new GridLineCellLayerPainter |
| |
| Canvas viewportCanvas |
| |
| override paintLayer(ViewportLayer viewportLayer, PixelRectangle paintBounds, GraphicsContext gc) { |
| val swtGC = gc as SWTGraphicsContext |
| |
| viewportLayer.visiblePixelRectangle = paintBounds |
| |
| if (viewportCanvas == null) { |
| viewportCanvas = new Canvas(swtGC.SWTComposite, SWT::H_SCROLL.bitwiseOr(SWT::V_SCROLL)) |
| |
| // Paint listener |
| |
| viewportCanvas.addPaintListener([ event | |
| val swtBounds = viewportCanvas.bounds |
| defaultPainter.paintLayer(viewportLayer, new PixelRectangle(swtBounds.x, swtBounds.y, swtBounds.width, swtBounds.height), new SWTGraphicsContext(viewportCanvas, event.gc)) |
| ]) |
| |
| // ScrollBar handlers |
| |
| val horizontalScrollBarHandler = new ScrollBarHandler(viewportCanvas.horizontalBar, viewportLayer.horizontalAxis as ViewportAxis) |
| val verticalScrollBarHandler = new ScrollBarHandler(viewportCanvas.verticalBar, viewportLayer.verticalAxis as ViewportAxis) |
| |
| viewportCanvas.horizontalBar.addListener(SWT::Selection, horizontalScrollBarHandler) |
| viewportCanvas.verticalBar.addListener(SWT::Selection, verticalScrollBarHandler) |
| |
| viewportCanvas.horizontalBar.addDisposeListener([ viewportCanvas.horizontalBar.removeListener(SWT::Selection, horizontalScrollBarHandler) ]) |
| viewportCanvas.verticalBar.addDisposeListener([ viewportCanvas.verticalBar.removeListener(SWT::Selection, verticalScrollBarHandler) ]) |
| |
| // Resize listener |
| |
| viewportCanvas.addListener(SWT::Resize, [ event | |
| // Horizontal |
| viewportLayer.horizontalAxis.handleResize |
| horizontalScrollBarHandler.recalculateScrollBarSize |
| // Vertical |
| viewportLayer.verticalAxis.handleResize |
| verticalScrollBarHandler.recalculateScrollBarSize |
| ]) |
| } |
| |
| // Resize viewport canvas |
| |
| val clipBounds = gc.clipBounds |
| viewportCanvas.bounds = new Rectangle(swtGC.getXOffset + clipBounds.x, swtGC.getYOffset + clipBounds.y, clipBounds.width, clipBounds.height) |
| } |
| |
| } |