refactory: added UI removed from core plugin.

[phpeclipse.git] / net.sourceforge.phpeclipse.ui / src / net / sourceforge / phpdt / internal / ui / util / SWTUtil.java

diff --git a/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/util/SWTUtil.java b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/util/SWTUtil.java
new file mode 100644 (file)
index 0000000..979463c
--- /dev/null
+++ b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/util/SWTUtil.java
@@ -0,0 +1,120 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.ui.util;
+
+import org.eclipse.jface.dialogs.IDialogConstants;
+import org.eclipse.jface.resource.JFaceResources;
+import org.eclipse.jface.util.Assert;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.dnd.DragSource;
+import org.eclipse.swt.dnd.DropTarget;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.widgets.Button;
+import org.eclipse.swt.widgets.Caret;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Menu;
+import org.eclipse.swt.widgets.ScrollBar;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.swt.widgets.Table;
+import org.eclipse.swt.widgets.Widget;
+
+/**
+ * Utility class to simplify access to some SWT resources.
+ */
+public class SWTUtil {
+
+       /**
+        * Returns the standard display to be used. The method first checks, if the
+        * thread calling this method has an associated disaply. If so, this display
+        * is returned. Otherwise the method returns the default display.
+        */
+       public static Display getStandardDisplay() {
+               Display display;
+               display = Display.getCurrent();
+               if (display == null)
+                       display = Display.getDefault();
+               return display;
+       }
+
+       /**
+        * Returns the shell for the given widget. If the widget doesn't represent a
+        * SWT object that manage a shell, <code>null</code> is returned.
+        * 
+        * @return the shell for the given widget
+        */
+       public static Shell getShell(Widget widget) {
+               if (widget instanceof Control)
+                       return ((Control) widget).getShell();
+               if (widget instanceof Caret)
+                       return ((Caret) widget).getParent().getShell();
+               if (widget instanceof DragSource)
+                       return ((DragSource) widget).getControl().getShell();
+               if (widget instanceof DropTarget)
+                       return ((DropTarget) widget).getControl().getShell();
+               if (widget instanceof Menu)
+                       return ((Menu) widget).getParent().getShell();
+               if (widget instanceof ScrollBar)
+                       return ((ScrollBar) widget).getParent().getShell();
+
+               return null;
+       }
+
+       /**
+        * Returns a width hint for a button control.
+        */
+       public static int getButtonWidthHint(Button button) {
+               button.setFont(JFaceResources.getDialogFont());
+               PixelConverter converter = new PixelConverter(button);
+               int widthHint = converter
+                               .convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH);
+               return Math.max(widthHint, button.computeSize(SWT.DEFAULT, SWT.DEFAULT,
+                               true).x);
+       }
+
+       /**
+        * Returns a height hint for a button control.
+        */
+       public static int getButtonHeightHint(Button button) {
+               button.setFont(JFaceResources.getDialogFont());
+               PixelConverter converter = new PixelConverter(button);
+               return converter
+                               .convertVerticalDLUsToPixels(IDialogConstants.BUTTON_HEIGHT);
+       }
+
+       /**
+        * Sets width and height hint for the button control. <b>Note:</b> This is
+        * a NOP if the button's layout data is not an instance of
+        * <code>GridData</code>.
+        * 
+        * @param button
+        *            the button for which to set the dimension hint
+        */
+       public static void setButtonDimensionHint(Button button) {
+               Assert.isNotNull(button);
+               Object gd = button.getLayoutData();
+               if (gd instanceof GridData) {
+                       ((GridData) gd).heightHint = getButtonHeightHint(button);
+                       ((GridData) gd).widthHint = getButtonWidthHint(button);
+                       ((GridData) gd).horizontalAlignment = GridData.FILL;
+               }
+       }
+
+       public static int getTableHeightHint(Table table, int rows) {
+               if (table.getFont().equals(JFaceResources.getDefaultFont()))
+                       table.setFont(JFaceResources.getDialogFont());
+               int result = table.getItemHeight() * rows + table.getHeaderHeight();
+               if (table.getLinesVisible())
+                       result += table.getGridLineWidth() * (rows - 1);
+               return result;
+       }
+
+}