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import java.util.Iterator; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.List; |
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import org.eclipse.draw2d.geometry.Insets; |
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import org.eclipse.draw2d.geometry.PointList; |
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import org.eclipse.draw2d.geometry.PointList; |
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import org.eclipse.draw2d.geometry.Rectangle; |
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import org.eclipse.draw2d.geometry.Rectangle; |
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/** |
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/** |
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* Clipping strategy for connection layer, which takes into account nested |
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* Clipping strategy for connection layer, which takes into account nested view |
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* view ports and truncates those parts of connections which reach outside |
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* ports and truncates those parts of connections which reach outside and are |
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* and are thus not visible. |
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* thus not visible. |
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* |
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* |
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* @author Alexander Nyssen |
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* @author Alexander Nyssen |
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* @author Philip Ritzkopf |
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* @author Philip Ritzkopf |
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Lines 19-24
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public class ViewportAwareConnectionLayerClippingStrategy implements |
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public class ViewportAwareConnectionLayerClippingStrategy implements |
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IClippingStrategy { |
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IClippingStrategy { |
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private static final Insets PRIVATE_INSETS = new Insets(0, 0, 1, 1); |
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private ConnectionLayer connectionLayer = null; |
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private ConnectionLayer connectionLayer = null; |
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public ViewportAwareConnectionLayerClippingStrategy( |
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public ViewportAwareConnectionLayerClippingStrategy( |
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Lines 46-53
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} |
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} |
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/** |
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/** |
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* Computes clipping rectangle(s) for a given connection. Will consider |
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* Computes clipping rectangle(s) for a given connection. Will consider all |
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* all enclosing viewports, excluding the root viewport. |
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* enclosing viewports, excluding the root viewport. |
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*/ |
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*/ |
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protected Rectangle[] getEdgeClippingRectangle(Connection connection) { |
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protected Rectangle[] getEdgeClippingRectangle(Connection connection) { |
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// start with clipping the connection at its original bounds |
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// start with clipping the connection at its original bounds |
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Lines 80-86
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.getParent())); |
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.getParent())); |
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} |
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} |
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// if the nearest common viewport of source and target is not simultaneously |
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// if the nearest common viewport of source and target is not |
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// simultaneously |
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// the nearest enclosing viewport of source and target respectively, the |
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// the nearest enclosing viewport of source and target respectively, the |
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// connection has to be further clipped (the connection may even not be |
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// connection has to be further clipped (the connection may even not be |
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// visible at all) |
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// visible at all) |
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Lines 94-114
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// itself be nested in other viewports). |
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// itself be nested in other viewports). |
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Rectangle sourceClipRect = getAbsoluteBoundsAsCopy(sourceFigure); |
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Rectangle sourceClipRect = getAbsoluteBoundsAsCopy(sourceFigure); |
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if (nearestEnclosingSourceViewport != nearestEnclosingCommonViewport) { |
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if (nearestEnclosingSourceViewport != nearestEnclosingCommonViewport) { |
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clipAtViewports(sourceClipRect, ViewportUtilities |
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clipAtViewports(sourceClipRect, |
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.getViewportsPath(nearestEnclosingSourceViewport, |
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ViewportUtilities.getViewportsPath( |
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nearestEnclosingSourceViewport, |
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nearestEnclosingCommonViewport, false)); |
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nearestEnclosingCommonViewport, false)); |
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} |
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} |
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Rectangle targetClipRect = getAbsoluteBoundsAsCopy(targetFigure); |
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Rectangle targetClipRect = getAbsoluteBoundsAsCopy(targetFigure); |
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if (nearestEnclosingTargetViewport != nearestEnclosingCommonViewport) { |
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if (nearestEnclosingTargetViewport != nearestEnclosingCommonViewport) { |
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clipAtViewports(targetClipRect, ViewportUtilities |
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clipAtViewports(targetClipRect, |
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.getViewportsPath(nearestEnclosingTargetViewport, |
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ViewportUtilities.getViewportsPath( |
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nearestEnclosingTargetViewport, |
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nearestEnclosingCommonViewport, false)); |
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nearestEnclosingCommonViewport, false)); |
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} |
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} |
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PointList absolutePointsAsCopy = getAbsolutePointsAsCopy(connection); |
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PointList absolutePointsAsCopy = getAbsolutePointsAsCopy(connection); |
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boolean sourceAnchorVisible = sourceClipRect |
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boolean sourceAnchorVisible = sourceClipRect.getExpanded( |
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.contains(absolutePointsAsCopy.getFirstPoint()); |
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PRIVATE_INSETS).contains( |
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boolean targetAnchorVisible = targetClipRect |
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absolutePointsAsCopy.getFirstPoint()); |
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.contains(absolutePointsAsCopy.getLastPoint()); |
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boolean targetAnchorVisible = targetClipRect.getExpanded( |
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PRIVATE_INSETS).contains( |
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absolutePointsAsCopy.getLastPoint()); |
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if (!sourceAnchorVisible || !targetAnchorVisible) { |
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if (!sourceAnchorVisible || !targetAnchorVisible) { |
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// one (or both) of source or target anchor is invisible |
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// one (or both) of source or target anchor is invisible |
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Lines 136-143
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} |
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} |
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/** |
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/** |
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* Computes clipping rectangle for a given (node) figure. Will consider |
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* Computes clipping rectangle for a given (node) figure. Will consider all |
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* all enclosing viewports, excluding the root viewport. |
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* enclosing viewports, excluding the root viewport. |
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*/ |
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*/ |
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protected Rectangle getNodeClippingRectangle(IFigure figure) { |
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protected Rectangle getNodeClippingRectangle(IFigure figure) { |
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// start with the bounds of the edit part's figure |
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// start with the bounds of the edit part's figure |
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Lines 160-167
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List enclosingViewportsPath) { |
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List enclosingViewportsPath) { |
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for (Iterator iterator = enclosingViewportsPath.iterator(); iterator |
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for (Iterator iterator = enclosingViewportsPath.iterator(); iterator |
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.hasNext();) { |
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.hasNext();) { |
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clipRect.intersect(getAbsoluteViewportClientAreaAsCopy((Viewport) iterator |
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Viewport viewport = (Viewport) iterator.next(); |
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.next())); |
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clipRect.intersect(getAbsoluteViewportAreaAsCopy(viewport)); |
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} |
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} |
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} |
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} |
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Lines 171-178
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* viewport of primary and connection layer. |
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* viewport of primary and connection layer. |
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*/ |
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*/ |
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protected Viewport getRootViewport() { |
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protected Viewport getRootViewport() { |
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return ViewportUtilities |
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return ViewportUtilities.getNearestEnclosingViewport(connectionLayer); |
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.getNearestEnclosingViewport(connectionLayer); |
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} |
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} |
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/** |
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/** |
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Lines 185-194
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} |
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} |
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/** |
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/** |
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* Returns the area covered by the viewport in absolute coordinates. |
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*/ |
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protected Rectangle getAbsoluteViewportAreaAsCopy(Viewport viewport) { |
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Rectangle absoluteViewportArea = null; |
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if (viewport.getParent().getBorder() != null |
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&& viewport.getParent().getBorder().isOpaque()) { |
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absoluteViewportArea = getAbsoluteViewportClientAreaAsCopy(viewport); |
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} else { |
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absoluteViewportArea = getAbsoluteBoundsAsCopy(viewport.getParent()); |
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} |
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return absoluteViewportArea; |
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} |
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/** |
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* Returns the viewport's client area in absolute coordinates. |
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* Returns the viewport's client area in absolute coordinates. |
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*/ |
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*/ |
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protected Rectangle getAbsoluteViewportClientAreaAsCopy( |
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protected Rectangle getAbsoluteViewportClientAreaAsCopy(Viewport viewport) { |
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Viewport viewport) { |
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Rectangle absoluteClientArea = viewport.getClientArea(); |
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Rectangle absoluteClientArea = viewport.getClientArea(); |
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viewport.translateToParent(absoluteClientArea); |
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viewport.translateToParent(absoluteClientArea); |
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viewport.translateToAbsolute(absoluteClientArea); |
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viewport.translateToAbsolute(absoluteClientArea); |
