com.ksyzt.gwt.client.common.ImageUploader Maven / Gradle / Ivy
package com.ksyzt.gwt.client.common;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.MouseOutEvent;
import com.google.gwt.event.dom.client.MouseOutHandler;
import com.google.gwt.event.dom.client.MouseOverEvent;
import com.google.gwt.event.dom.client.MouseOverHandler;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONParser;
import com.google.gwt.json.client.JSONString;
import com.google.gwt.json.client.JSONValue;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiConstructor;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.ui.AbsolutePanel;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FileUpload;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent;
import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler;
import com.google.gwt.user.client.ui.FormPanel.SubmitEvent;
import com.google.gwt.user.client.ui.FormPanel.SubmitHandler;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Hidden;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.Widget;
import com.ksyzt.gwt.client.event.MessageEvent;
// TODO: Auto-generated Javadoc
/**
* The Class ImageUploader.
*/
public class ImageUploader extends MessageComposite {
/**
* The ui binder.
*/
private static ImageUploaderUiBinder uiBinder = GWT
.create(ImageUploaderUiBinder.class);
/**
* The Interface ImageUploaderUiBinder.
*/
interface ImageUploaderUiBinder extends UiBinder {
}
/**
* The root.
*/
@UiField
AbsolutePanel root;
/**
* The btn cancel.
*/
@UiField
Button btnCancel;
/**
* The m image click.
*/
private ClickHandler m_image_click = new ClickHandler() {
public void onClick(ClickEvent event) {
panelLoader.setVisible(true);
}
};
/**
* The m cancel click.
*/
ClickHandler m_cancel_click = new ClickHandler() {
public void onClick(ClickEvent event) {
panelLoader.setVisible(false);
}
};
/**
* The info.
*/
@UiField
Label info;
/**
* The m mouse over.
*/
private MouseOverHandler m_mouse_over = new MouseOverHandler() {
public void onMouseOver(MouseOverEvent event) {
if (!panelLoader.isVisible()) {
info.setVisible(true);
}
}
};
/**
* The m mouse out.
*/
MouseOutHandler m_mouse_out = new MouseOutHandler() {
public void onMouseOut(MouseOutEvent event) {
info.setVisible(false);
}
};
/**
* Instantiates a new image uploader.
*/
@UiConstructor
public ImageUploader() {
initWidget(uiBinder.createAndBindUi(this));
html.addClickHandler(m_image_click);
btnCancel.addClickHandler(m_cancel_click);
uploader.setName("fileset");
uploader.addChangeHandler(m_file_change);
form.setEncoding(FormPanel.ENCODING_MULTIPART);
form.setMethod(FormPanel.METHOD_POST);
form.setAction(GWT.getModuleBaseURL() + "../gwtfileuploader");
form.addSubmitHandler(m_submit_handler);
form.addSubmitCompleteHandler(m_submit_complete_handler);
panelLoader.setVisible(false);
html.addMouseOverHandler(m_mouse_over);
html.addMouseOutHandler(m_mouse_out);
}
/**
* Can upload.
*
* @param ft the ft
* @return true, if successful
*/
public boolean canUpload(String ft) {
boolean b = false;
if (ft.compareToIgnoreCase("zip") == 0
|| ft.compareToIgnoreCase("png") == 0
|| ft.compareToIgnoreCase("bmp") == 0
|| ft.compareToIgnoreCase("jpg") == 0
|| ft.compareToIgnoreCase("jpeg") == 0
|| ft.compareToIgnoreCase("swf") == 0
|| ft.compareToIgnoreCase("doc") == 0
|| ft.compareToIgnoreCase("docx") == 0
|| ft.compareToIgnoreCase("gif") == 0
|| ft.compareToIgnoreCase("txt") == 0)
b = true;
return b;
}
/**
* The m file change.
*/
private ChangeHandler m_file_change = new ChangeHandler() {
public void onChange(ChangeEvent event) {
String fn = uploader.getFilename();
if (uploader.getFilename().equals("")) {
} else {
int lastdot = fn.lastIndexOf('.');
if (lastdot > 0) {
String filetype = fn.substring(lastdot + 1);
if (canUpload(filetype)) {
form.submit();
} else {
message("不能上传此文件格式");
}
}
}
}
};
/* (non-Javadoc)
* @see com.ksyzt.gwt.client.common.MessageComposite#message(java.lang.String)
*/
public void message(String msg) {
MessageEvent ev = new MessageEvent(MessageEvent.MESSAGE, msg);
fireEvent(ev);
}
/**
* The m submit handler.
*/
private SubmitHandler m_submit_handler = new SubmitHandler() {
public void onSubmit(SubmitEvent event) {
}
};
/**
* The html.
*/
@UiField
HTML html;
/**
* The m submit complete handler.
*/
private SubmitCompleteHandler m_submit_complete_handler = new SubmitCompleteHandler() {
public void onSubmitComplete(SubmitCompleteEvent event) {
String jsonstr = event.getResults();
JSONValue rvalue = JSONParser.parse(jsonstr);
JSONObject robj = rvalue.isObject();
JSONString msg = (JSONString) robj.get("err").isString();
if (msg.stringValue().equals("")) {
JSONObject data = robj.get("data").isObject();
String path = data.get("path").isString().stringValue();
String url = data.get("url").isString().stringValue();
mUrl = url;
int w = root.getOffsetWidth() - 6;
int h = root.getOffsetHeight() - 6;
String imgdata = "![](" + url + ")
";
html.setHTML(imgdata);
MessageEvent ev = new MessageEvent(MessageEvent.SUCCESS, path);
fireEvent(ev);
message("上传成功");
} else {
message(msg.stringValue());
}
panelLoader.setVisible(false);
}
};
/**
* The panel loader.
*/
@UiField
FlowPanel panelLoader;
/**
* The uploader.
*/
@UiField
FileUpload uploader;
/**
* The thumb width.
*/
@UiField
Hidden thumbWidth;
/**
* The thumb height.
*/
@UiField
Hidden thumbHeight;
/**
* The m height.
*/
int m_height = 334;
/**
* The m width.
*/
int m_width = 228;
/**
* Sets the thumb size.
*
* @param w the w
* @param h the h
*/
public void setThumbSize(int w, int h) {
if (w > 0) {
m_width = w;
}
if (h > 0) {
m_height = h;
}
}
/**
* The form.
*/
@UiField
FormPanel form;
/**
* 设置初始化图像.
*
* @param url the new image
*/
public void setImage(String url) {
if (url == null || url.length() == 0) {
int w = this.getOffsetWidth() - 6;
int h = this.getOffsetHeight() - 6;
url = SysResource.INSTANCE.upload().getSafeUri().asString();
String imgdata = "";
html.setHTML(imgdata);
} else {
int w = this.getOffsetWidth() - 6;
int h = this.getOffsetHeight() - 6;
String imgdata = "";
html.setHTML(imgdata);
}
panelLoader.setVisible(false);
}
/**
* The btn remove picture.
*/
@UiField
Button btnRemovePicture;
/**
* 删除新闻图片.
*
* @param e the e
*/
@UiHandler("btnRemovePicture")
void onbtnRemovePicture(ClickEvent e) {
MessageEvent ev = new MessageEvent(MessageEvent.DELETE, 0);
fireEvent(ev);
}
/**
* Reset.
*/
public void reset() {
form.reset();
thumbHeight.setValue(m_height + "");
thumbWidth.setValue(m_width + "");
}
/**
* The m url.
*/
private String mUrl = "";
/**
* 获取图像Url.
*
* @return the image relative url
*/
public String getImageRelativeUrl() {
return mUrl;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy