Java/GWT/Image
Версия от 18:01, 31 мая 2010; (обсуждение)
Image widget that overcomes PNG browser incompatabilities
package com.jexp.gwt.client;
import com.google.gwt.user.client.*;
import com.google.gwt.user.client.ui.*;
import com.google.gwt.core.client.*;
public class GWTClient implements EntryPoint{
public void onModuleLoad() {
RootPanel.get().add(new ToggleButton("images/close.png",16,16));
}
}
/*
* Copyright 2006 Robert Hanson <iamroberthanson AT gmail.ru>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
class ToggleButton extends ImageButton
{
private int trueState;
public ToggleButton (String url, int width, int height)
{
super(url, width, height);
}
protected void init ()
{
addMouseListener(new MouseListenerAdapter(){
public void onMouseEnter (Widget sender)
{
trueState = getState();
setState(ON_STATE);
setColors();
}
public void onMouseLeave (Widget sender)
{
setState(trueState);
setColors();
}
});
}
public void setOn (boolean on)
{
if (on) {
setState(ON_STATE);
trueState = ON_STATE;
}
else {
setState(OFF_STATE);
trueState = OFF_STATE;
}
setColors();
}
/**
* Toggle button state
* @param on
*/
public void toggle ()
{
if (trueState == ON_STATE) {
trueState = OFF_STATE;
}
else {
trueState = ON_STATE;
}
setState(trueState);
setColors();
}
}
/*
* Copyright 2006 Robert Hanson <iamroberthanson AT gmail.ru>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Use an image as a button. Allows for setting of on/off
* background color, border color, border width, and border
* style. The "on" colors are used on mouse over.
*
* @author rhanson
*/
class ImageButton extends PNGImage
{
protected final static int ON_STATE = 1;
protected final static int OFF_STATE = -1;
private int state = OFF_STATE;
private String onStyle = "gwl-ImageButton-On";
private String offStyle = "gwl-ImageButton-Off";
private Color backgroundOnColor = Color.NONE;
private Color backgroundOffColor = Color.NONE;
private Color borderOnColor = Color.BLACK;
private Color borderOffColor = Color.NONE;
private int borderOnWidth = 1;
private int borderOffWidth = 0;
private int paddingLeft = 0;
private int paddingRight = 0;
private int paddingTop = 0;
private int paddingBottom = 0;
private BorderStyleConstant borderOnStyle = BorderStyle.BORDER_STYLE_SOLID;
private BorderStyleConstant borderOffStyle = BorderStyle.BORDER_STYLE_NONE;
public ImageButton (String url, int width, int height)
{
super(url, width, height);
setStyleName("gwl-image-button");
setColors();
init();
}
protected void init ()
{
addMouseListener(new MouseListenerAdapter(){
public void onMouseEnter (Widget sender)
{
state = ON_STATE;
setColors();
}
public void onMouseLeave (Widget sender)
{
state = OFF_STATE;
setColors();
}
});
}
public boolean isOn ()
{
return state == ON_STATE;
}
/**
* Updates the colors of the widget based on the state
* and color settings. This is usually only used after
* setting one or more of the colors.
*/
public void setColors ()
{
DOM.setStyleAttribute(getElement(), "paddingTop", getPaddingTopWidth() + "px");
DOM.setStyleAttribute(getElement(), "paddingRight", getPaddingRightWidth() + "px");
DOM.setStyleAttribute(getElement(), "paddingBottom", getPaddingBottomWidth() + "px");
DOM.setStyleAttribute(getElement(), "paddingLeft", getPaddingLeftWidth() + "px");
DOM.setStyleAttribute(getElement(), "borderWidth", getBorderWidth() + "px");
DOM.setStyleAttribute(getElement(), "borderColor", getBorderColor().getHexValue());
DOM.setStyleAttribute(getElement(), "borderStyle", getBorderStyle().getBorderStyleName());
DOM.setStyleAttribute(getElement(), "backgroundColor", getBackgroundColor().getHexValue());
setStyleName(getCssStyleName());
}
private String getCssStyleName ()
{
if (state == ON_STATE)
return onStyle;
else
return offStyle;
}
private Color getBackgroundColor ()
{
if (state == ON_STATE)
return backgroundOnColor;
else
return backgroundOffColor;
}
private BorderStyleConstant getBorderStyle ()
{
if (state == ON_STATE)
return borderOnStyle;
else
return borderOffStyle;
}
private Color getBorderColor ()
{
if (state == ON_STATE)
return borderOnColor;
else
return borderOffColor;
}
private int getBorderWidth ()
{
if (state == ON_STATE)
return borderOnWidth;
else
return borderOffWidth;
}
private int getPaddingLeftWidth ()
{
int max = (borderOnWidth > borderOffWidth) ? borderOnWidth : borderOffWidth;
if (state == ON_STATE) {
return (max - borderOnWidth + paddingLeft);
}
else {
return (max - borderOffWidth + paddingLeft);
}
}
private int getPaddingRightWidth ()
{
int max = (borderOnWidth > borderOffWidth) ? borderOnWidth : borderOffWidth;
if (state == ON_STATE) {
return (max - borderOnWidth + paddingRight);
}
else {
return (max - borderOffWidth + paddingRight);
}
}
private int getPaddingTopWidth ()
{
int max = (borderOnWidth > borderOffWidth) ? borderOnWidth : borderOffWidth;
if (state == ON_STATE) {
return (max - borderOnWidth + paddingTop);
}
else {
return (max - borderOffWidth + paddingTop);
}
}
private int getPaddingBottomWidth ()
{
int max = (borderOnWidth > borderOffWidth) ? borderOnWidth : borderOffWidth;
if (state == ON_STATE) {
return (max - borderOnWidth + paddingBottom);
}
else {
return (max - borderOffWidth + paddingBottom);
}
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setMargin (int px)
{
DOM.setStyleAttribute(getElement(), "margin", px + "px");
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setHorizontalMargin (int px)
{
DOM.setStyleAttribute(getElement(), "marginLeft", px + "px");
DOM.setStyleAttribute(getElement(), "marginRight", px + "px");
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setVerticleMargin (int px)
{
DOM.setStyleAttribute(getElement(), "marginTop", px + "px");
DOM.setStyleAttribute(getElement(), "marginBotom", px + "px");
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public Color getBackgroundOffColor ()
{
return backgroundOffColor;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setBackgroundOffColor (Color backgroundOffColor)
{
this.backgroundOffColor = backgroundOffColor;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public Color getBackgroundOnColor ()
{
return backgroundOnColor;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setBackgroundOnColor (Color backgroundOnColor)
{
this.backgroundOnColor = backgroundOnColor;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public Color getBorderOffColor ()
{
return borderOffColor;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setBorderOffColor (Color borderOffColor)
{
this.borderOffColor = borderOffColor;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public BorderStyleConstant getBorderOffStyle ()
{
return borderOffStyle;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setBorderOffStyle (BorderStyleConstant borderOffStyle)
{
this.borderOffStyle = borderOffStyle;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public int getBorderOffWidth ()
{
return borderOffWidth;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setBorderOffWidth (int borderOffWidth)
{
this.borderOffWidth = borderOffWidth;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public Color getBorderOnColor ()
{
return borderOnColor;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setBorderOnColor (Color borderOnColor)
{
this.borderOnColor = borderOnColor;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public BorderStyleConstant getBorderOnStyle ()
{
return borderOnStyle;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setBorderOnStyle (BorderStyleConstant borderOnStyle)
{
this.borderOnStyle = borderOnStyle;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public int getBorderOnWidth ()
{
return borderOnWidth;
}
/**
* This method is under consideration for removal,
* if you have an opion please comment on http://gwtwidgets.blogspot.ru.
*/
public void setBorderOnWidth (int borderOnWidth)
{
this.borderOnWidth = borderOnWidth;
}
protected int getState ()
{
return state;
}
protected void setState (int state)
{
this.state = state;
}
public String getOffStyle ()
{
return offStyle;
}
public void setOffStyle (String offStyle)
{
this.offStyle = offStyle;
}
public String getOnStyle ()
{
return onStyle;
}
public void setOnStyle (String onStyle)
{
this.onStyle = onStyle;
}
}
/*
* Copyright 2006 Robert Hanson <iamroberthanson AT gmail.ru>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Image widget that overcomes PNG browser incompatabilities.
* Although meant for PNG images, it will work with any image
* format supported by the browser. If the image file ends
* with ".png" or ".PNG" it will use the PNG specific routines,
* otherwise will use generic non-PNG specific routines.
*
* The URL, width, and height are required at the creation of the
* widget, and may not be updated via the widget methogs. Calling
* setUrl() will throw a RuntimeException. This is in part due to
* the workarounds required for IE 5.5 and IE6.
*
* @author rhanson
*/
class PNGImage extends Image
{
private PNGImageImpl impl;
public PNGImage (String url, int width, int height)
{
impl = (PNGImageImpl) GWT.create(PNGImageImpl.class);
setElement(impl.createElement(url, width, height));
sinkEvents(Event.ONCLICK | Event.MOUSEEVENTS | Event.ONLOAD | Event.ONERROR);
}
public String getUrl ()
{
return impl.getUrl(this);
}
/**
* Should not be used. Throws RuntimeException
*/
public void setUrl (String url)
{
throw new RuntimeException("Not allowed to set url for a PNG image");
}
}
/*
* Copyright 2006 Robert Hanson <iamroberthanson AT gmail.ru>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
class PNGImageImpl
{
public Element createElement (String url, int width, int height)
{
Element result = DOM.createImg();
DOM.setAttribute(result, "src", url);
DOM.setIntAttribute(result, "width", width);
DOM.setIntAttribute(result, "height", height);
return result;
}
public String getUrl (PNGImage image)
{
return DOM.getAttribute(image.getElement(), "src");
}
}
/*
* Copyright 2006 Robert Hanson <iamroberthanson AT gmail.ru>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
class PNGImageImplIE6 extends PNGImageImpl
{
private String url;
private boolean isPng;
public Element createElement (String url, int width, int height)
{
this.url = url;
if (url.endsWith(".png") || url.endsWith(".PNG")) {
isPng = true;
}
else {
isPng = false;
}
if (isPng) {
Element div = DOM.createDiv();
DOM.setInnerHTML(div, "<span style=\"display:inline-block;width:" + width + "px;height:" + height + "px;filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src="" + url + "", sizingMethod="scale")\"></span>");
return DOM.getFirstChild(div);
}
else {
return super.createElement(url, width, height);
}
}
public String getUrl (PNGImage image)
{
if (isPng) {
return url;
}
else {
return super.getUrl(image);
}
}
}
public class BorderStyleConstant
{
private String styleName;
public BorderStyleConstant (String styleName)
{
this.styleName = styleName;
}
public String getBorderStyleName() {
return styleName;
}
}
class BorderStyle
{
final public static BorderStyleConstant BORDER_STYLE_NONE = new BorderStyleConstant("none");
final public static BorderStyleConstant BORDER_STYLE_DOTTED = new BorderStyleConstant("dotted");
final public static BorderStyleConstant BORDER_STYLE_DASHED = new BorderStyleConstant("dashed");
final public static BorderStyleConstant BORDER_STYLE_SOLID = new BorderStyleConstant("solid");
final public static BorderStyleConstant BORDER_STYLE_DOUBLE = new BorderStyleConstant("double");
final public static BorderStyleConstant BORDER_STYLE_GROOVE = new BorderStyleConstant("groove");
final public static BorderStyleConstant BORDER_STYLE_RIDGE = new BorderStyleConstant("ridge");
final public static BorderStyleConstant BORDER_STYLE_INSET = new BorderStyleConstant("inset");
final public static BorderStyleConstant BORDER_STYLE_OUTSET = new BorderStyleConstant("outset");
}
class Color
{
public final static Color WHITE = new Color(255, 255, 255);
public final static Color LIGHT_GRAY = new Color(192, 192, 192);
public final static Color GRAY = new Color(128, 128, 128);
public final static Color DARK_GRAY = new Color(64, 64, 64);
public final static Color BLACK = new Color(0, 0, 0);
public final static Color RED = new Color(255, 0, 0);
public final static Color PINK = new Color(255, 175, 175);
public final static Color ORANGE = new Color(255, 200, 0);
public final static Color YELLOW = new Color(255, 255, 0);
public final static Color GREEN = new Color(0, 255, 0);
public final static Color MAGENTA = new Color(255, 0, 255);
public final static Color CYAN = new Color(0, 255, 255);
public final static Color BLUE = new Color(0, 0, 255);
public static final Color NONE = new Color("");
private int r, g, b;
// only for special cases, like no color, or maybe named colors
private String colorText = null;
private Color (String colorText) {
this.colorText = colorText;
}
public Color (int r, int g, int b)
{
this.r = r;
this.g = g;
this.b = b;
}
public int getRed ()
{
return r;
}
public int getGreen ()
{
return g;
}
public int getBlue ()
{
return b;
}
public String getHexValue ()
{
if (colorText != null) {
return colorText;
}
return "#"
+ pad(Integer.toHexString(r))
+ pad(Integer.toHexString(g))
+ pad(Integer.toHexString(b));
}
private String pad (String in)
{
if (in.length() == 0) {
return "00";
}
if (in.length() == 1) {
return "0" + in;
}
return in;
}
public String toString ()
{
if (colorText != null) {
return colorText;
}
return "red=" + r + ", green=" + g + ", blue=" + b;
}
}
Load image
package com.jexp.gwt.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.DockPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Image;
public class GWTClient implements EntryPoint {
public void onModuleLoad() {
Button b = new Button("Click me", new ClickListener() {
public void onClick(Widget sender) {
DialogBox dlg = new MyDialog();
dlg.center();
}
});
RootPanel.get().add(b);
}
}
class MyDialog extends DialogBox implements ClickListener {
public MyDialog() {
setText("Sample DialogBox");
Button closeButton = new Button("Close", this);
HTML msg = new HTML("<center>A standard dialog box component.</center>",true);
DockPanel dock = new DockPanel();
dock.setSpacing(4);
dock.add(closeButton, DockPanel.SOUTH);
dock.add(msg, DockPanel.NORTH);
dock.add(new Image("images/yourImage.jpg"), DockPanel.CENTER);
dock.setCellHorizontalAlignment(closeButton, DockPanel.ALIGN_RIGHT);
dock.setWidth("100%");
setWidget(dock);
}
public void onClick(Widget sender) {
hide();
}
}
Use GWT Resource To Load Images
package com.jexp.gwt.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.client.ui.RichTextArea;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.DOM;
public class GWTClient implements EntryPoint {
public void onModuleLoad() {
RichTextArea area = new RichTextArea();
RichTextToolbar tb = new RichTextToolbar(area);
VerticalPanel p = new VerticalPanel();
p.add(tb);
p.add(area);
area.setHeight("14em");
area.setWidth("100%");
tb.setWidth("100%");
p.setWidth("100%");
DOM.setStyleAttribute(p.getElement(), "margin-right", "4px");
p.setWidth("32em");
RootPanel.get().add(p);
}
}
//////////////////
/*
* Copyright 2007 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
//package com.google.gwt.sample.kitchensink.client;
package com.jexp.gwt.client;
import com.google.gwt.core.client.GWT;
import com.google.gwt.i18n.client.Constants;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.AbstractImagePrototype;
import com.google.gwt.user.client.ui.ChangeListener;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.ruposite;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.ImageBundle;
import com.google.gwt.user.client.ui.KeyboardListener;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.PushButton;
import com.google.gwt.user.client.ui.RichTextArea;
import com.google.gwt.user.client.ui.ToggleButton;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
/**
* A sample toolbar for use with {@link RichTextArea}. It provides a simple UI
* for all rich text formatting, dynamically displayed only for the available
* functionality.
*/
public class RichTextToolbar extends Composite {
/**
* This {@link ImageBundle} is used for all the button icons. Using an image
* bundle allows all of these images to be packed into a single image, which
* saves a lot of HTTP requests, drastically improving startup time.
*/
public interface Images extends ImageBundle {
/**
* @gwt.resource bold.gif
*/
AbstractImagePrototype bold();
/**
* @gwt.resource createLink.gif
*/
AbstractImagePrototype createLink();
/**
* @gwt.resource hr.gif
*/
AbstractImagePrototype hr();
/**
* @gwt.resource indent.gif
*/
AbstractImagePrototype indent();
/**
* @gwt.resource insertImage.gif
*/
AbstractImagePrototype insertImage();
/**
* @gwt.resource italic.gif
*/
AbstractImagePrototype italic();
/**
* @gwt.resource justifyCenter.gif
*/
AbstractImagePrototype justifyCenter();
/**
* @gwt.resource justifyLeft.gif
*/
AbstractImagePrototype justifyLeft();
/**
* @gwt.resource justifyRight.gif
*/
AbstractImagePrototype justifyRight();
/**
* @gwt.resource ol.gif
*/
AbstractImagePrototype ol();
/**
* @gwt.resource outdent.gif
*/
AbstractImagePrototype outdent();
/**
* @gwt.resource removeFormat.gif
*/
AbstractImagePrototype removeFormat();
/**
* @gwt.resource removeLink.gif
*/
AbstractImagePrototype removeLink();
/**
* @gwt.resource strikeThrough.gif
*/
AbstractImagePrototype strikeThrough();
/**
* @gwt.resource subscript.gif
*/
AbstractImagePrototype subscript();
/**
* @gwt.resource superscript.gif
*/
AbstractImagePrototype superscript();
/**
* @gwt.resource ul.gif
*/
AbstractImagePrototype ul();
/**
* @gwt.resource underline.gif
*/
AbstractImagePrototype underline();
}
/**
* This {@link Constants} interface is used to make the toolbar"s strings
* internationalizable.
*/
public interface Strings extends Constants {
String black();
String blue();
String bold();
String color();
String createLink();
String font();
String green();
String hr();
String indent();
String insertImage();
String italic();
String justifyCenter();
String justifyLeft();
String justifyRight();
String large();
String medium();
String normal();
String ol();
String outdent();
String red();
String removeFormat();
String removeLink();
String size();
String small();
String strikeThrough();
String subscript();
String superscript();
String ul();
String underline();
String white();
String xlarge();
String xsmall();
String xxlarge();
String xxsmall();
String yellow();
}
/**
* We use an inner EventListener class to avoid exposing event methods on the
* RichTextToolbar itself.
*/
private class EventListener implements ClickListener, ChangeListener,
KeyboardListener {
public void onChange(Widget sender) {
if (sender == backColors) {
basic.setBackColor(backColors.getValue(backColors.getSelectedIndex()));
backColors.setSelectedIndex(0);
} else if (sender == foreColors) {
basic.setForeColor(foreColors.getValue(foreColors.getSelectedIndex()));
foreColors.setSelectedIndex(0);
} else if (sender == fonts) {
basic.setFontName(fonts.getValue(fonts.getSelectedIndex()));
fonts.setSelectedIndex(0);
} else if (sender == fontSizes) {
basic.setFontSize(fontSizesConstants[fontSizes.getSelectedIndex() - 1]);
fontSizes.setSelectedIndex(0);
}
}
public void onClick(Widget sender) {
if (sender == bold) {
basic.toggleBold();
} else if (sender == italic) {
basic.toggleItalic();
} else if (sender == underline) {
basic.toggleUnderline();
} else if (sender == subscript) {
basic.toggleSubscript();
} else if (sender == superscript) {
basic.toggleSuperscript();
} else if (sender == strikethrough) {
extended.toggleStrikethrough();
} else if (sender == indent) {
extended.rightIndent();
} else if (sender == outdent) {
extended.leftIndent();
} else if (sender == justifyLeft) {
basic.setJustification(RichTextArea.Justification.LEFT);
} else if (sender == justifyCenter) {
basic.setJustification(RichTextArea.Justification.CENTER);
} else if (sender == justifyRight) {
basic.setJustification(RichTextArea.Justification.RIGHT);
} else if (sender == insertImage) {
String url = Window.prompt("Enter an image URL:", "http://");
if (url != null) {
extended.insertImage(url);
}
} else if (sender == createLink) {
String url = Window.prompt("Enter a link URL:", "http://");
if (url != null) {
extended.createLink(url);
}
} else if (sender == removeLink) {
extended.removeLink();
} else if (sender == hr) {
extended.insertHorizontalRule();
} else if (sender == ol) {
extended.insertOrderedList();
} else if (sender == ul) {
extended.insertUnorderedList();
} else if (sender == removeFormat) {
extended.removeFormat();
} else if (sender == richText) {
// We use the RichTextArea"s onKeyUp event to update the toolbar status.
// This will catch any cases where the user moves the cursur using the
// keyboard, or uses one of the browser"s built-in keyboard shortcuts.
updateStatus();
}
}
public void onKeyDown(Widget sender, char keyCode, int modifiers) {
}
public void onKeyPress(Widget sender, char keyCode, int modifiers) {
}
public void onKeyUp(Widget sender, char keyCode, int modifiers) {
if (sender == richText) {
// We use the RichTextArea"s onKeyUp event to update the toolbar status.
// This will catch any cases where the user moves the cursur using the
// keyboard, or uses one of the browser"s built-in keyboard shortcuts.
updateStatus();
}
}
}
private static final RichTextArea.FontSize[] fontSizesConstants = new RichTextArea.FontSize[] {
RichTextArea.FontSize.XX_SMALL, RichTextArea.FontSize.X_SMALL,
RichTextArea.FontSize.SMALL, RichTextArea.FontSize.MEDIUM,
RichTextArea.FontSize.LARGE, RichTextArea.FontSize.X_LARGE,
RichTextArea.FontSize.XX_LARGE};
private Images images = (Images) GWT.create(Images.class);
private Strings strings = (Strings) GWT.create(Strings.class);
private EventListener listener = new EventListener();
private RichTextArea richText;
private RichTextArea.BasicFormatter basic;
private RichTextArea.ExtendedFormatter extended;
private VerticalPanel outer = new VerticalPanel();
private HorizontalPanel topPanel = new HorizontalPanel();
private HorizontalPanel bottomPanel = new HorizontalPanel();
private ToggleButton bold;
private ToggleButton italic;
private ToggleButton underline;
private ToggleButton subscript;
private ToggleButton superscript;
private ToggleButton strikethrough;
private PushButton indent;
private PushButton outdent;
private PushButton justifyLeft;
private PushButton justifyCenter;
private PushButton justifyRight;
private PushButton hr;
private PushButton ol;
private PushButton ul;
private PushButton insertImage;
private PushButton createLink;
private PushButton removeLink;
private PushButton removeFormat;
private ListBox backColors;
private ListBox foreColors;
private ListBox fonts;
private ListBox fontSizes;
/**
* Creates a new toolbar that drives the given rich text area.
*
* @param richText the rich text area to be controlled
*/
public RichTextToolbar(RichTextArea richText) {
this.richText = richText;
this.basic = richText.getBasicFormatter();
this.extended = richText.getExtendedFormatter();
outer.add(topPanel);
outer.add(bottomPanel);
topPanel.setWidth("100%");
bottomPanel.setWidth("100%");
initWidget(outer);
setStyleName("gwt-RichTextToolbar");
if (basic != null) {
topPanel.add(bold = createToggleButton(images.bold(), strings.bold()));
topPanel.add(italic = createToggleButton(images.italic(), strings.italic()));
topPanel.add(underline = createToggleButton(images.underline(),
strings.underline()));
topPanel.add(subscript = createToggleButton(images.subscript(),
strings.subscript()));
topPanel.add(superscript = createToggleButton(images.superscript(),
strings.superscript()));
topPanel.add(justifyLeft = createPushButton(images.justifyLeft(),
strings.justifyLeft()));
topPanel.add(justifyCenter = createPushButton(images.justifyCenter(),
strings.justifyCenter()));
topPanel.add(justifyRight = createPushButton(images.justifyRight(),
strings.justifyRight()));
}
if (extended != null) {
topPanel.add(strikethrough = createToggleButton(images.strikeThrough(),
strings.strikeThrough()));
topPanel.add(indent = createPushButton(images.indent(), strings.indent()));
topPanel.add(outdent = createPushButton(images.outdent(), strings.outdent()));
topPanel.add(hr = createPushButton(images.hr(), strings.hr()));
topPanel.add(ol = createPushButton(images.ol(), strings.ol()));
topPanel.add(ul = createPushButton(images.ul(), strings.ul()));
topPanel.add(insertImage = createPushButton(images.insertImage(),
strings.insertImage()));
topPanel.add(createLink = createPushButton(images.createLink(),
strings.createLink()));
topPanel.add(removeLink = createPushButton(images.removeLink(),
strings.removeLink()));
topPanel.add(removeFormat = createPushButton(images.removeFormat(),
strings.removeFormat()));
}
if (basic != null) {
bottomPanel.add(backColors = createColorList("Background"));
bottomPanel.add(foreColors = createColorList("Foreground"));
bottomPanel.add(fonts = createFontList());
bottomPanel.add(fontSizes = createFontSizes());
// We only use these listeners for updating status, so don"t hook them up
// unless at least basic editing is supported.
richText.addKeyboardListener(listener);
richText.addClickListener(listener);
}
}
private ListBox createColorList(String caption) {
ListBox lb = new ListBox();
lb.addChangeListener(listener);
lb.setVisibleItemCount(1);
lb.addItem(caption);
lb.addItem(strings.white(), "white");
lb.addItem(strings.black(), "black");
lb.addItem(strings.red(), "red");
lb.addItem(strings.green(), "green");
lb.addItem(strings.yellow(), "yellow");
lb.addItem(strings.blue(), "blue");
return lb;
}
private ListBox createFontList() {
ListBox lb = new ListBox();
lb.addChangeListener(listener);
lb.setVisibleItemCount(1);
lb.addItem(strings.font(), "");
lb.addItem(strings.normal(), "");
lb.addItem("Times New Roman", "Times New Roman");
lb.addItem("Arial", "Arial");
lb.addItem("Courier New", "Courier New");
lb.addItem("Georgia", "Georgia");
lb.addItem("Trebuchet", "Trebuchet");
lb.addItem("Verdana", "Verdana");
return lb;
}
private ListBox createFontSizes() {
ListBox lb = new ListBox();
lb.addChangeListener(listener);
lb.setVisibleItemCount(1);
lb.addItem(strings.size());
lb.addItem(strings.xxsmall());
lb.addItem(strings.xsmall());
lb.addItem(strings.small());
lb.addItem(strings.medium());
lb.addItem(strings.large());
lb.addItem(strings.xlarge());
lb.addItem(strings.xxlarge());
return lb;
}
private PushButton createPushButton(AbstractImagePrototype img, String tip) {
PushButton pb = new PushButton(img.createImage());
pb.addClickListener(listener);
pb.setTitle(tip);
return pb;
}
private ToggleButton createToggleButton(AbstractImagePrototype img, String tip) {
ToggleButton tb = new ToggleButton(img.createImage());
tb.addClickListener(listener);
tb.setTitle(tip);
return tb;
}
/**
* Updates the status of all the stateful buttons.
*/
private void updateStatus() {
if (basic != null) {
bold.setDown(basic.isBold());
italic.setDown(basic.isItalic());
underline.setDown(basic.isUnderlined());
subscript.setDown(basic.isSubscript());
superscript.setDown(basic.isSuperscript());
}
if (extended != null) {
strikethrough.setDown(extended.isStrikethrough());
}
}
}
