net.sourceforge.phpeclipse.webbrowser/src/org/eclipse/webbrowser/internal/SWTUtil.java

   1 /**********************************************************************
   2  * Copyright (c) 2003 IBM Corporation and others.
   3  * All rights reserved.   This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *    IBM - Initial API and implementation
  10  **********************************************************************/
  11 package org.eclipse.webbrowser.internal;
  12
  13 import org.eclipse.jface.dialogs.Dialog;
  14 import org.eclipse.jface.dialogs.IDialogConstants;
  15 import org.eclipse.jface.resource.JFaceResources;
  16 import org.eclipse.swt.SWT;
  17 import org.eclipse.swt.graphics.FontMetrics;
  18 import org.eclipse.swt.graphics.GC;
  19 import org.eclipse.swt.layout.GridData;
  20 import org.eclipse.swt.layout.GridLayout;
  21 import org.eclipse.swt.widgets.Button;
  22 import org.eclipse.swt.widgets.Composite;
  23 import org.eclipse.swt.widgets.Control;
  24 import org.eclipse.swt.widgets.Label;
  25 /**
  26  * SWT Utility class.
  27  */
  28 public class SWTUtil {
  29         private static FontMetrics fontMetrics;
  30
  31         protected static void initializeDialogUnits(Control testControl) {
  32                 // Compute and store a font metric
  33                 GC gc = new GC(testControl);
  34                 gc.setFont(JFaceResources.getDialogFont());
  35                 fontMetrics = gc.getFontMetrics();
  36                 gc.dispose();
  37         }
  38
  39         /**
  40          * Returns a width hint for a button control.
  41          */
  42         protected static int getButtonWidthHint(Button button) {
  43                 int widthHint = Dialog.convertHorizontalDLUsToPixels(fontMetrics, IDialogConstants.BUTTON_WIDTH);
  44                 return Math.max(widthHint, button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
  45         }
  46
  47         public static Button createButton(Composite comp, String label) {
  48                 Button b = new Button(comp, SWT.PUSH);
  49                 b.setText(label);
  50                 if (fontMetrics == null)
  51                         initializeDialogUnits(comp);
  52                 GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_BEGINNING);
  53                 data.widthHint = getButtonWidthHint(b);
  54                 data.heightHint = Dialog.convertVerticalDLUsToPixels(fontMetrics, IDialogConstants.BUTTON_HEIGHT);
  55                 b.setLayoutData(data);
  56                 return b;
  57         }
  58
  59         public static Button createCheckbox(Composite comp, String txt, boolean isSelected){
  60                 Button button = new Button(comp, SWT.CHECK);
  61                 button.setText(txt);
  62                 GridLayout layout = new GridLayout();
  63                 comp.setLayout(layout);
  64                 GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_BEGINNING);
  65                 data.horizontalIndent = 10;
  66                 button.setLayoutData(data);
  67                 button.setSelection(isSelected);
  68                 return button;
  69         }
  70
  71         public static Label createLabel(Composite comp, String txt) {
  72                 Label label = new Label(comp, SWT.NONE);
  73                 label.setText(txt);
  74                 label.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING | GridData.VERTICAL_ALIGN_BEGINNING));
  75                 return label;
  76         }
  77 }