/*******************************************************************************
* Copyright (c) 2000, 2012 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.examples.controlexample;
import java.io.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.custom.*;
class StyledTextTab extends ScrollableTab {
/* Example widgets and groups that contain them */
StyledText styledText;
Group styledTextGroup, styledTextStyleGroup;
/* Style widgets added to the "Style" group */
Button wrapButton, readOnlyButton, fullSelectionButton;
/* Buttons for adding StyleRanges to StyledText */
Button boldButton, italicButton, redButton, yellowButton, underlineButton, strikeoutButton;
Image boldImage, italicImage, redImage, yellowImage, underlineImage, strikeoutImage;
/* Variables for saving state. */
String text;
StyleRange[] styleRanges;
/**
* Creates the Tab within a given instance of ControlExample.
*/
StyledTextTab(ControlExample instance) {
super(instance);
}
/**
* Creates a bitmap image.
*/
Image createBitmapImage (Display display, String name) {
InputStream sourceStream = ControlExample.class.getResourceAsStream (name + ".bmp");
InputStream maskStream = ControlExample.class.getResourceAsStream (name + "_mask.bmp");
ImageData source = new ImageData (sourceStream);
ImageData mask = new ImageData (maskStream);
Image result = new Image (display, source, mask);
try {
sourceStream.close ();
maskStream.close ();
} catch (IOException e) {
e.printStackTrace ();
}
return result;
}
/**
* Creates the "Control" widget children.
*/
void createControlWidgets () {
super.createControlWidgets ();
/* Add a group for modifying the StyledText widget */
createStyledTextStyleGroup ();
}
/**
* Creates the "Example" group.
*/
void createExampleGroup () {
super.createExampleGroup ();
/* Create a group for the styled text widget */
styledTextGroup = new Group (exampleGroup, SWT.NONE);
styledTextGroup.setLayout (new GridLayout ());
styledTextGroup.setLayoutData (new GridData (SWT.FILL, SWT.FILL, true, true));
styledTextGroup.setText ("StyledText");
}
/**
* Creates the "Example" widgets.
*/
void createExampleWidgets () {
/* Compute the widget style */
int style = getDefaultStyle();
if (singleButton.getSelection ()) style |= SWT.SINGLE;
if (multiButton.getSelection ()) style |= SWT.MULTI;
if (horizontalButton.getSelection ()) style |= SWT.H_SCROLL;
if (verticalButton.getSelection ()) style |= SWT.V_SCROLL;
if (wrapButton.getSelection ()) style |= SWT.WRAP;
if (readOnlyButton.getSelection ()) style |= SWT.READ_ONLY;
if (borderButton.getSelection ()) style |= SWT.BORDER;
if (fullSelectionButton.getSelection ()) style |= SWT.FULL_SELECTION;
/* Create the example widgets */
styledText = new StyledText (styledTextGroup, style);
styledText.setText (ControlExample.getResourceString("Example_string"));
styledText.append ("\n");
styledText.append (ControlExample.getResourceString("One_Two_Three"));
if (text != null) {
styledText.setText(text);
text = null;
}
if (styleRanges != null) {
styledText.setStyleRanges(styleRanges);
styleRanges = null;
}
}
/**
* Creates the "Style" group.
*/
void createStyleGroup() {
super.createStyleGroup();
/* Create the extra widgets */
wrapButton = new Button (styleGroup, SWT.CHECK);
wrapButton.setText ("SWT.WRAP");
readOnlyButton = new Button (styleGroup, SWT.CHECK);
readOnlyButton.setText ("SWT.READ_ONLY");
fullSelectionButton = new Button (styleGroup, SWT.CHECK);
fullSelectionButton.setText ("SWT.FULL_SELECTION");
}
/**
* Creates the "StyledText Style" group.
*/
void createStyledTextStyleGroup () {
styledTextStyleGroup = new Group (controlGroup, SWT.NONE);
styledTextStyleGroup.setText (ControlExample.getResourceString ("StyledText_Styles"));
styledTextStyleGroup.setLayout (new GridLayout(6, false));
GridData data = new GridData (GridData.HORIZONTAL_ALIGN_FILL);
data.horizontalSpan = 2;
styledTextStyleGroup.setLayoutData (data);
/* Get images */
boldImage = createBitmapImage (display, "bold");
italicImage = createBitmapImage (display, "italic");
redImage = createBitmapImage (display, "red");
yellowImage = createBitmapImage (display, "yellow");
underlineImage = createBitmapImage (display, "underline");
strikeoutImage = createBitmapImage (display, "strikeout");
/* Create controls to modify the StyledText */
Label label = new Label (styledTextStyleGroup, SWT.NONE);
label.setText (ControlExample.getResourceString ("StyledText_Style_Instructions"));
label.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false, 6, 1));
label = new Label (styledTextStyleGroup, SWT.NONE);
label.setText (ControlExample.getResourceString ("Bold"));
label.setLayoutData(new GridData(SWT.END, SWT.CENTER, true, false));
boldButton = new Button (styledTextStyleGroup, SWT.PUSH);
boldButton.setImage (boldImage);
label = new Label (styledTextStyleGroup, SWT.NONE);
label.setText (ControlExample.getResourceString ("Underline"));
label.setLayoutData(new GridData(SWT.END, SWT.CENTER, true, false));
underlineButton = new Button (styledTextStyleGroup, SWT.PUSH);
underlineButton.setImage (underlineImage);
label = new Label (styledTextStyleGroup, SWT.NONE);
label.setText (ControlExample.getResourceString ("Foreground_Style"));
label.setLayoutData(new GridData(SWT.END, SWT.CENTER, true, false));
redButton = new Button (styledTextStyleGroup, SWT.PUSH);
redButton.setImage (redImage);
label = new Label (styledTextStyleGroup, SWT.NONE);
label.setText (ControlExample.getResourceString ("Italic"));
label.setLayoutData(new GridData(SWT.END, SWT.CENTER, true, false));
italicButton = new Button (styledTextStyleGroup, SWT.PUSH);
italicButton.setImage (italicImage);
label = new Label (styledTextStyleGroup, SWT.NONE);
label.setText (ControlExample.getResourceString ("Strikeout"));
label.setLayoutData(new GridData(SWT.END, SWT.CENTER, true, false));
strikeoutButton = new Button (styledTextStyleGroup, SWT.PUSH);
strikeoutButton.setImage (strikeoutImage);
label = new Label (styledTextStyleGroup, SWT.NONE);
label.setText (ControlExample.getResourceString ("Background_Style"));
label.setLayoutData(new GridData(SWT.END, SWT.CENTER, true, false));
yellowButton = new Button (styledTextStyleGroup, SWT.PUSH);
yellowButton.setImage (yellowImage);
SelectionListener styleListener = new SelectionAdapter () {
public void widgetSelected (SelectionEvent e) {
Point sel = styledText.getSelectionRange();
if ((sel == null) || (sel.y == 0)) return;
StyleRange style;
for (int i = sel.x; i<sel.x+sel.y; i++) {
StyleRange range = styledText.getStyleRangeAtOffset(i);
if (range != null) {
style = (StyleRange)range.clone();
style.start = i;
style.length = 1;
} else {
style = new StyleRange(i, 1, null, null, SWT.NORMAL);
}
if (e.widget == boldButton) {
style.fontStyle ^= SWT.BOLD;
} else if (e.widget == italicButton) {
style.fontStyle ^= SWT.ITALIC;
} else if (e.widget == underlineButton) {
style.underline = !style.underline;
} else if (e.widget == strikeoutButton) {
style.strikeout = !style.strikeout;
}
styledText.setStyleRange(style);
}
styledText.setSelectionRange(sel.x + sel.y, 0);
}
};
SelectionListener colorListener = new SelectionAdapter () {
public void widgetSelected (SelectionEvent e) {
Point sel = styledText.getSelectionRange();
if ((sel == null) || (sel.y == 0)) return;
Color fg = null, bg = null;
if (e.widget == redButton) {
fg = display.getSystemColor (SWT.COLOR_RED);
} else if (e.widget == yellowButton) {
bg = display.getSystemColor (SWT.COLOR_YELLOW);
}
StyleRange style;
for (int i = sel.x; i<sel.x+sel.y; i++) {
StyleRange range = styledText.getStyleRangeAtOffset(i);
if (range != null) {
style = (StyleRange)range.clone();
style.start = i;
style.length = 1;
style.foreground = style.foreground != null ? null : fg;
style.background = style.background != null ? null : bg;
} else {
style = new StyleRange (i, 1, fg, bg, SWT.NORMAL);
}
styledText.setStyleRange(style);
}
styledText.setSelectionRange(sel.x + sel.y, 0);
}
};
boldButton.addSelectionListener(styleListener);
italicButton.addSelectionListener(styleListener);
underlineButton.addSelectionListener(styleListener);
strikeoutButton.addSelectionListener(styleListener);
redButton.addSelectionListener(colorListener);
yellowButton.addSelectionListener(colorListener);
yellowButton.addDisposeListener(new DisposeListener () {
public void widgetDisposed (DisposeEvent e) {
boldImage.dispose();
italicImage.dispose();
redImage.dispose();
yellowImage.dispose();
underlineImage.dispose();
strikeoutImage.dispose();
}
});
}
/**
* Creates the tab folder page.
*
* @param tabFolder org.eclipse.swt.widgets.TabFolder
* @return the new page for the tab folder
*/
Composite createTabFolderPage (TabFolder tabFolder) {
super.createTabFolderPage (tabFolder);
/*
* Add a resize listener to the tabFolderPage so that
* if the user types into the example widget to change
* its preferred size, and then resizes the shell, we
* recalculate the preferred size correctly.
*/
tabFolderPage.addControlListener(new ControlAdapter() {
public void controlResized(ControlEvent e) {
setExampleWidgetSize ();
}
});
return tabFolderPage;
}
/**
* Disposes the "Example" widgets.
*/
void disposeExampleWidgets () {
/* store the state of the styledText if applicable */
if (styledText != null) {
styleRanges = styledText.getStyleRanges();
text = styledText.getText();
}
super.disposeExampleWidgets();
}
/**
* Gets the "Example" widget children.
*/
Control [] getExampleWidgets () {
return new Control [] {styledText};
}
/**
* Returns a list of set/get API method names (without the set/get prefix)
* that can be used to set/get values in the example control(s).
*/
String[] getMethodNames() {
return new String[] {"CaretOffset", "DoubleClickEnabled", "Editable", "HorizontalIndex", "HorizontalPixel", "Orientation", "Selection", "Tabs", "Text", "TextLimit", "ToolTipText", "TopIndex", "TopPixel", "WordWrap"};
}
/**
* Gets the text for the tab folder item.
*/
String getTabText () {
return "StyledText";
}
/**
* Sets the state of the "Example" widgets.
*/
void setExampleWidgetState () {
super.setExampleWidgetState ();
wrapButton.setSelection ((styledText.getStyle () & SWT.WRAP) != 0);
readOnlyButton.setSelection ((styledText.getStyle () & SWT.READ_ONLY) != 0);
fullSelectionButton.setSelection ((styledText.getStyle () & SWT.FULL_SELECTION) != 0);
horizontalButton.setEnabled ((styledText.getStyle () & SWT.MULTI) != 0);
verticalButton.setEnabled ((styledText.getStyle () & SWT.MULTI) != 0);
wrapButton.setEnabled ((styledText.getStyle () & SWT.MULTI) != 0);
}
}