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/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.common.ui.internal.dialogfield;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.FontMetrics;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.forms.widgets.FormToolkit;
public class LayoutUtil {
// The Text control looks higher then Button control when they have the same
// height,
// Increasing the height of 5 pixels will make them looks the same height.
private final static int BUTTON_HEIGHT_ADJUSTMENT = 5;
public static Control createEmptySpace(FormToolkit kit, Composite parent,
int span) {
Label label;
if (kit != null) {
label = kit.createLabel(parent, "");
} else {
label = new Label(parent, SWT.LEFT);
}
GridData gd = new GridData();
gd.horizontalAlignment = GridData.BEGINNING;
gd.grabExcessHorizontalSpace = false;
gd.horizontalSpan = span;
gd.horizontalIndent = 0;
gd.widthHint = 0;
gd.heightHint = 0;
label.setLayoutData(gd);
return label;
}
public static Composite createComposite(FormToolkit kit, Composite parent,
int span, int internalSpan) {
Composite c;
if (kit != null) {
c = kit.createComposite(parent);
kit.paintBordersFor(c);
} else {
c = new Composite(parent, SWT.NONE);
}
GridData gd = new GridData();
gd.grabExcessHorizontalSpace = true;
gd.horizontalSpan = span;
gd.horizontalIndent = 0;
c.setLayoutData(gd);
GridLayout layout = new GridLayout();
layout.numColumns = internalSpan;
c.setLayout(layout);
return c;
}
/**
* Calculates the number of columns needed by field editors
*/
public static int getNumberOfColumns(DialogField[] editors) {
int nCulumns = 0;
for (int i = 0; i < editors.length; i++) {
nCulumns = Math.max(editors[i].getNumberOfControls(), nCulumns);
}
return nCulumns;
}
/**
* Creates a composite and fills in the given editors.
*
* @param labelOnTop
* Defines if the label of all fields should be on top of the
* fields
*/
public static void doDefaultLayout(FormToolkit toolkit, Composite parent,
DialogField[] editors, boolean labelOnTop) {
doDefaultLayout(toolkit, parent, editors, labelOnTop, 0, 0, 0, 0);
}
/**
* Creates a composite and fills in the given editors.
*
* @param labelOnTop
* Defines if the label of all fields should be on top of the
* fields
* @param minWidth
* The minimal width of the composite
* @param minHeight
* The minimal height of the composite
*/
public static void doDefaultLayout(FormToolkit toolkit, Composite parent,
DialogField[] editors, boolean labelOnTop, int minWidth,
int minHeight) {
doDefaultLayout(toolkit, parent, editors, labelOnTop, minWidth,
minHeight, 0, 0);
}
/**
* Creates a composite and fills in the given editors.
*
* @param labelOnTop
* Defines if the label of all fields should be on top of the
* fields
* @param minWidth
* The minimal width of the composite
* @param minHeight
* The minimal height of the composite
* @param marginWidth
* The margin width to be used by the composite
* @param marginHeight
* The margin height to be used by the composite
* @deprecated
*/
public static void doDefaultLayout(FormToolkit toolkit, Composite parent,
DialogField[] editors, boolean labelOnTop, int minWidth,
int minHeight, int marginWidth, int marginHeight) {
int nCulumns = getNumberOfColumns(editors);
Control[][] controls = new Control[editors.length][];
for (int i = 0; i < editors.length; i++) {
controls[i] = editors[i].doFillIntoGrid(toolkit, parent, nCulumns);
}
if (labelOnTop) {
nCulumns--;
modifyLabelSpans(controls, nCulumns);
}
GridLayout layout = new GridLayout();
if (marginWidth != SWT.DEFAULT) {
layout.marginWidth = marginWidth;
}
if (marginHeight != SWT.DEFAULT) {
layout.marginHeight = marginHeight;
}
layout.numColumns = nCulumns;
parent.setLayout(layout);
}
private static void modifyLabelSpans(Control[][] controls, int nCulumns) {
for (int i = 0; i < controls.length; i++) {
setHorizontalSpan(controls[i][0], nCulumns);
}
}
/**
* Sets the span of a control. Assumes that GridData is used.
*/
public static void setHorizontalSpan(Control control, int span) {
Object ld = control.getLayoutData();
if (ld instanceof GridData) {
((GridData) ld).horizontalSpan = span;
} else if (span != 1) {
GridData gd = new GridData();
gd.horizontalSpan = span;
control.setLayoutData(gd);
}
}
public static void setGrabHorizontal(Control control, boolean grab) {
Object ld = control.getLayoutData();
if (ld instanceof GridData) {
((GridData) ld).grabExcessHorizontalSpace = grab;
}
}
/**
* Sets the width hint of a control. Assumes that GridData is used.
*/
public static void setWidthHint(Control control, int widthHint) {
Object ld = control.getLayoutData();
if (ld instanceof GridData) {
((GridData) ld).widthHint = widthHint;
}
}
/**
* Sets the heigthHint hint of a control. Assumes that GridData is used.
*/
public static void setHeigthHint(Control control, int heigthHint) {
Object ld = control.getLayoutData();
if (ld instanceof GridData) {
((GridData) ld).heightHint = heigthHint;
}
}
/**
* Sets the horizontal indent of a control. Assumes that GridData is used.
*/
public static void setHorizontalIndent(Control control, int horizontalIndent) {
Object ld = control.getLayoutData();
if (ld instanceof GridData) {
((GridData) ld).horizontalIndent = horizontalIndent;
}
}
/**
* Sets the horizontal indent of a control. Assumes that GridData is used.
*/
public static void setHorizontalGrabbing(Control control) {
Object ld = control.getLayoutData();
if (ld instanceof GridData) {
((GridData) ld).grabExcessHorizontalSpace = true;
}
}
/**
* Returns a width hint for a button control.
*/
public static int getButtonWidthHint(Button button) {
if (button.getFont().equals(JFaceResources.getDefaultFont()))
button.setFont(JFaceResources.getDialogFont());
GC gc = new GC(button);
gc.setFont(button.getFont());
FontMetrics fontMetrics = gc.getFontMetrics();
gc.dispose();
int length = button.getText().length();
int widthHint = Dialog.convertWidthInCharsToPixels(fontMetrics,
length < 2 ? 2 : length);
return Math.max(widthHint, button.computeSize(SWT.DEFAULT, SWT.DEFAULT,
true).x);
}
public static int getButtonHeightHint(FormToolkit toolkit, Text text) {
if (toolkit != null) {
return text.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).y
+ BUTTON_HEIGHT_ADJUSTMENT;
}
return text.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).y;
}
}
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