没用过，不过看了下它其实就是这个项目的延伸http://teethgrinder.co.uk/open-flash-chart-2/
只要数据库取出来的数据组织成他指定的JSON格式就可以： http://teethgrinder.co.uk/open-flash-chart-2/tutorial-6.php
看例子：http://ofcgwt.googlecode.com/svn/demo/Demo.html
看了下他也只是封装了下，你看下
http://ofcgwt.googlecode.com/svn/trunk/src/com/rednels/ofcgwt/client/ChartWidget.java
这个文件，里面主要是几个函数
private native void loadJSON(String id, String json)
/*
Copyright (C) 2009 Grant Slender
This file is part of OFCGWT.
http://code.google.com/p/ofcgwt/
OFCGWT is free software: you can redistribute it and/or modify
it under the terms of the Lesser GNU General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
OFCGWT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
See <http://www.gnu.org/licenses/lgpl-3.0.txt>.
*/
package com.rednels.ofcgwt.client;
import java.util.Date;
import java.util.List;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.Widget;
import com.rednels.ofcgwt.client.event.ChartClickEvent;
import com.rednels.ofcgwt.client.event.ChartClickHandler;
import com.rednels.ofcgwt.client.event.DataValueEvents;
import com.rednels.ofcgwt.client.event.KeyClickHandler;
import com.rednels.ofcgwt.client.model.ChartData;
/**
* A gwt chart widget based on Open Flash Chart.</br></br>
*
* Create the ChartWidget and add anywhere a GWT widget can be used. Use the
* model {@link ChartData} to build a chart and then pass to
* {@link ChartWidget#setChartData(ChartData)} and it will generate and set the
* correct JSON data.
* <p/>
* You can also set JSON via the {@link #setJsonData(String)} method.
*
*/
public class ChartWidget extends Widget {
public static final String MIN_PLAYER_VERSION = "9.0.0";
public static final String ALTERNATE_SWF_SRC = "expressInstall.swf";
private static final CacheFixImpl cacheFixImpl = GWT.create(CacheFixImpl.class);
private static int count = 0;
private boolean isSWFInjected = false;
private boolean cacheFixEnabled = false;
private boolean hasFlashPlayer = false;
private String swfId;
private String swfDivId;
private String jsonData = ChartFactory.BLANK_CHART_JSON_DATA;
private String width = "100%";
private String height = "100%";
private String innerDivTextForFlashPlayerNotFound = "FlashPlayer ${flashPlayer.version} is required.";
private String flashurl = "ofcgwt/open-flash-chart.swf";
private String urlPrefix = GWT.getModuleBaseURL();
private ChartData chartData;
private Element chartElement;
/**
* Creates a new ChartWidget. *
*/
public ChartWidget() {
swfId = "swfID_" + count;
swfDivId = "swfDivID_" + count;
++count;
chartElement = DOM.createElement("div");
DOM.setElementProperty(chartElement, "id", swfDivId);
setElement(chartElement);
setSize(width, height);
hasFlashPlayer = hasFlashPlayerVersion(MIN_PLAYER_VERSION);
cacheFixEnabled = cacheFixImpl.isCacheFixNeeded();
}
/**
* Gets the current OFC flash URL. Defaults to just "open-flash-chart.swf"
*
* @return the flashurl
*/
public String getFlashUrl() {
return flashurl;
}
/**
* Gets the objects height.
*
* @return height
*/
public String getHeight() {
return height;
}
/**
* Gets the InnerDiv Text for when flash player is not found or can't be
* injected.
*
* @return string
*/
public String getInnerDivTextForFlashPlayerNotFound() {
return innerDivTextForFlashPlayerNotFound;
}
/**
* Gets the current JSON data for this chart.
*
* @return a JSON string
*/
public String getJsonData() {
return jsonData;
}
/**
* @return the swfId
*/
public String getSwfId() {
return swfId;
}
/**
* @return the urlPrefix
*/
public String getUrlPrefix() {
return urlPrefix;
}
/**
* Gets the objects width.
*
* @return width
*/
public String getWidth() {
return width;
}
/**
* Is the CacheFix Enabled?
*
* @return true if cache fix is enabled, false if not
*/
public boolean isCacheFixEnabled() {
return cacheFixEnabled;
}
/**
* Obtains raw image data of this chart. Call returns null if the flash
* chart is not loaded.
*
* @return String chart image data
*/
public String getImageData() {
if (hasFlashPlayer && isSWFInjected) {
return getImageData(getSwfId());
}
return null;
}
/**
* Enables an fix/workaround that stops caching of the swf which on IE may
* solve some bugs. The workaround adds a unique parameter url to each SWF
* making each chart widget non-cachable. On IE this feature is enabled by
* default, other agents it is disabled. </br></br>Enable this if you find
* problems in with multiple charts.
*
* @param enable
* - true to enable, false to disable
*/
public void setCacheFixEnabled(boolean enable) {
this.cacheFixEnabled = enable;
}
/**
* Sets this charts ChartData and processes it for handlers/events
*
* @param cd
* the ChartData model
*/
public void setChartData(ChartData cd) {
this.chartData = cd;
for (com.rednels.ofcgwt.client.model.elements.Element e : chartData.getElements()) {
// add chart click events...
for (ChartClickHandler cch : e.getChartClickHandlers()) {
String onclick = "ofc_onclick('" + getSwfId() + "','" + cch.hashCode() + "')";
e.setOnClick(onclick);
}
// add key click events...
for (KeyClickHandler kch : e.getKeyClickHandlers()) {
String onclick = "ofc_onclick('" + getSwfId() + "','" + kch.hashCode() + "')";
e.setKeyOnClick(onclick);
}
for (Object o : e.getValues()) {
if (o instanceof DataValueEvents) {
// add data value click events...
DataValueEvents dve = (DataValueEvents) o;
for (ChartClickHandler ch : dve.getHandlers()) {
String onclick = "ofc_onclick('" + getSwfId() + "','" + ch.hashCode() + "')";
dve.setOnClick(onclick);
}
}
}
}
setJsonData(chartData.buildJSON().toString());
}
/**
* Sets the OFC flash URL. ie "\path\open-flash-chart.swf"
*
* @param url
* string
*/
public void setFlashUrl(String url) {
this.flashurl = url;
}
public void setHeight(String height) {
height = height.trim().toLowerCase();
super.setHeight(height); // Width validation
this.height = height;
if (getHeight().equals(height)) {
if (isSWFInjected) {
Element elem = DOM.getFirstChild(getElement());
DOM.setElementAttribute(elem, "height", height);
}
}
}
/**
* Sets the InnerDiv Text for when flash player is not found or can't be
* injected. <br>
* Defaults to "FlashPlayer ${flashPlayer.version} is required."
*
* @param divtext
* a string
*/
public void setInnerDivTextForFlashPlayerNotFound(String divtext) {
this.innerDivTextForFlashPlayerNotFound = divtext;
}
/**
* Sets the JSON data for this chart & updates the chart if ready. Does
* nothing if the required flash player is not loaded.
*
* @param json
* a JSON string
*/
public void setJsonData(String json) {
// System.out.println(json);
this.jsonData = json;
if (hasFlashPlayer && isSWFInjected) {
loadJSON(swfId, jsonData);
}
}
/**
* Sets the url prefix of the OFC flash swf file. Defaults to the value of
* GWT.getModuleBaseURL()
*
* @param urlPrefix
* a URL string
*/
public void setUrlPrefix(String urlPrefix) {
this.urlPrefix = urlPrefix;
}
public void setWidth(String width) {
width = width.trim().toLowerCase();
super.setWidth(width); // Width validation
this.width = width;
if (getWidth().equals(width)) {
if (isSWFInjected) {
Element elem = DOM.getFirstChild(getElement());
DOM.setElementAttribute(elem, "width", width);
}
}
}
protected void doOnChartClick(String evt) {
for (com.rednels.ofcgwt.client.model.elements.Element e : chartData.getElements()) {
for (Object o : e.getValues()) {
if (o instanceof DataValueEvents) {
DataValueEvents ee = (DataValueEvents) o;
for (ChartClickHandler ch : ee.getHandlers()) {
if (evt.equals("" + ch.hashCode())) {
ch.onClick(new ChartClickEvent());
}
}
}
}
}
}
protected List<ChartClickHandler> getHandlers() {
return null;
}
protected void onAttach() {
chartElement.setInnerHTML("<div id=\"embed_" + swfId + "\">" + emptyInnerDiv() + "</div>");
ChartFactory.get().register(this);
if (!isSWFInjected) {
injectSWF(getInternalSWFURL(isCacheFixEnabled(), urlPrefix + flashurl, swfId), swfId, getWidth(), getHeight(), MIN_PLAYER_VERSION, ALTERNATE_SWF_SRC);
isSWFInjected = true;
}
super.onAttach();
}
protected void onDetach() {
ChartFactory.get().unregister(this);
chartElement.removeChild(chartElement.getChildNodes().getItem(0));
isSWFInjected = false;
super.onDetach();
}
private String emptyInnerDiv() {
return getInnerDivTextForFlashPlayerNotFound().replaceAll("\\$\\{flashPlayer.version\\}", MIN_PLAYER_VERSION);
}
/**
* Used internally to returns the correct open flash chart swf url
*
* @return the swf url string
*/
private String getInternalSWFURL(boolean iefix, String flashurl, String id) {
if (!iefix) return flashurl;
return flashurl + ("?id=" + id + (new Date().getTime()));
}
private native boolean hasFlashPlayerVersion(String v)
/*-{
return $wnd.swfobject.hasFlashPlayerVersion(v);
}-*/;
private native void injectSWF(String swf, String id, String w, String h, String ver, String alt)
/*-{
var flashvars = {id: id,allowResize: true};
var params = {scale: 'noscale', allowscriptaccess:'always',wmode: 'transparent'};
var attributes = { data: swf, width: w, height: h, id: id, name: id };
$wnd.swfobject.embedSWF(swf, "embed_"+id, w, h, ver, alt, flashvars, params, attributes);
}-*/;
private native void loadJSON(String id, String json)
/*-{
var swf = $doc.getElementById(id);
if ('load' in swf) swf.load(json);
}-*/;
private native String getImageData(String id)
/*-{
var swf = $doc.getElementById(id);
var data = null;
if ('get_img_binary' in swf) data = swf.get_img_binary();
return data;
}-*/;
}
我要提问
