projects/dwt-win: dwt/custom/ScrolledComposite.d comparison

comparison dwt/custom/ScrolledComposite.d @ 213:36f5cb12e1a2

Update to SWT 3.4M7

author	Frank Benoit <benoit@tionex.de>
date	Sat, 17 May 2008 17:34:28 +0200
parents	ab60f3309436
children	fd9c62a2998e

comparison

equal deleted inserted replaced

-:ab60f3309436
+:36f5cb12e1a2
 module dwt.custom.ScrolledComposite;
 import dwt.DWT;
 import dwt.DWTException;
+import dwt.events.DisposeEvent;
+import dwt.events.DisposeListener;
 import dwt.graphics.Point;
 import dwt.graphics.Rectangle;
 import dwt.widgets.Composite;
 import dwt.widgets.Control;
+import dwt.widgets.Display;
 import dwt.widgets.Event;
 import dwt.widgets.Layout;
 import dwt.widgets.Listener;
 import dwt.widgets.ScrollBar;
+import dwt.widgets.Shell;
 import dwt.custom.ScrolledCompositeLayout;
 import dwt.dwthelper.utils;
 /**
 * A ScrolledComposite provides scrollbars and will scroll its content when the user
 */
 public class ScrolledComposite : Composite {
 Control content;
 Listener contentListener;
+Listener filter;
 int minHeight = 0;
 int minWidth = 0;
 bool expandHorizontal = false;
 bool expandVertical = false;
 bool alwaysShowScroll = false;
+bool showFocusedControl = false;
 /**
 * Constructs a new instance of this class given its parent
 * and a style value describing its behavior and appearance.
 * <p>
 public void handleEvent(Event e) {
 if (e.type !is DWT.Resize) return;
 layout(false);
 }
 };
+filter = new class() Listener {
+public void handleEvent(Event event) {
+if ( auto control = cast(Control)event.widget ) {
+if (contains(control)) showControl(control);
+}
+}
+};
+addDisposeListener(new class() DisposeListener {
+public void widgetDisposed(DisposeEvent e) {
+getDisplay().removeFilter(DWT.FocusIn, filter);
+}
+});
 }
 static int checkStyle (int style) {
 int mask = DWT.H_SCROLL | DWT.V_SCROLL | DWT.BORDER | DWT.LEFT_TO_RIGHT | DWT.RIGHT_TO_LEFT;
 return style & mask;
+}
+bool contains(Control control) {
+if (control is null || control.isDisposed()) return false;
+Composite parent = control.getParent();
+while (parent !is null && !( null !is cast(Shell)parent )) {
+if (this is parent) return true;
+parent = parent.getParent();
+}
+return false;
 }
 /**
 * Returns the Always Show Scrollbars flag.  True if the scrollbars are
 * always shown even if they are not required.  False if the scrollbars are only
 * @return the control displayed in the content area
 */
 public Control getContent() {
 //checkWidget();
 return content;
+}
+/**
+* Returns <code>true</code> if the receiver automatically scrolls to a focused child control
+* to make it visible. Otherwise, returns <code>false</code>.
+*
+* @exception DWTException <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>
+*
+* @since 3.4
+*/
+public bool getShowFocusedControl() {
+checkWidget();
+return showFocusedControl;
 }
 void hScroll() {
 if (content is null) return;
 Point location = content.getLocation ();
 */
 public void setMinWidth(int width) {
 setMinSize(width, minHeight);
 }
+/**
+* Configure the receiver to automatically scroll to a focused child control
+* to make it visible.
+*
+* If show is <code>false</code>, show a focused control is off.
+* By default, show a focused control is off.
+*
+* @param show <code>true</code> to show a focused control.
+*
+* @exception DWTException <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>
+*
+*  @since 3.4
+*/
+public void setShowFocusedControl(bool show) {
+checkWidget();
+if (showFocusedControl is show) return;
+Display display = getDisplay();
+display.removeFilter(DWT.FocusIn, filter);
+showFocusedControl = show;
+if (!showFocusedControl) return;
+display.addFilter(DWT.FocusIn, filter);
+Control control = display.getFocusControl();
+if (contains(control)) showControl(control);
+}
+/**
+* Scrolls the content of the receiver so that the control is visible.
+*
+* @param control the control to be shown
+*
+* @exception IllegalArgumentException <ul>
+*    <li>ERROR_NULL_ARGUMENT - if the control is null</li>
+*    <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li>
+* </ul>
+* @exception DWTException <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>
+*
+* @since 3.4
+*/
+public void showControl(Control control) {
+checkWidget ();
+if (control is null) DWT.error(DWT.ERROR_NULL_ARGUMENT);
+if (control.isDisposed ()) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+if (!contains(control)) DWT.error(DWT.ERROR_INVALID_ARGUMENT);
+Rectangle itemRect = getDisplay().map(control.getParent(), this, control.getBounds());
+Rectangle area = getClientArea();
+Point origin = getOrigin();
+if (itemRect.x < 0) origin.x = Math.max(0, origin.x + itemRect.x);
+if (itemRect.y < 0) origin.y = Math.max(0, origin.y + itemRect.y);
+if (area.width < itemRect.x + itemRect.width) origin.x = Math.max(0, origin.x + itemRect.x + itemRect.width - area.width);
+if (area.height < itemRect.y + itemRect.height) origin.y = Math.max(0, origin.y + itemRect.y + itemRect.height - area.height);
+setOrigin(origin);
+}
 void vScroll() {
 if (content is null) return;
 Point location = content.getLocation ();
 ScrollBar vBar = getVerticalBar ();
 int vSelection = vBar.getSelection ();

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comparison dwt/custom/ScrolledComposite.d @ 213:36f5cb12e1a2