/*
* Copyright 2010 Manuel Carrasco Moñino. (manolo at apache/org)
* http://code.google.com/p/gwtupload
*
* 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 gwtupload.client;
import gwtupload.client.IFileInput.FileInputType;
import gwtupload.client.IUploadStatus.Status;
import java.util.ArrayList;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.HasClickHandlers;
import com.google.gwt.uibinder.client.UiChild;
import com.google.gwt.uibinder.client.UiConstructor;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Focusable;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.HasEnabled;
import com.google.gwt.user.client.ui.HasText;
import com.google.gwt.user.client.ui.Hidden;
import com.google.gwt.user.client.ui.Widget;
/**
* <p>
* Implementation of a single uploader panel with a submit button.
* </p>
*
* @author Manolo Carrasco Moñino
*
* <p>
* When the user selects a file, the button changes its style
* so the she could realize that she has to push the button.
* </p>
*
*/
public class SingleUploader extends Uploader {
protected Widget button;
private void setEnabledButton(boolean b) {
if (button != null) {
// HasEnabled is only available after gwt-2.1.x
if (button instanceof HasEnabled) {
((HasEnabled)button).setEnabled(b);
} else if (button instanceof Button) {
((Button)button).setEnabled(b);
}
}
}
/**
* Default constructor.
* Uses the standard browser input, a basic status widget, and
* creates a standard button to send the file
*
*/
public SingleUploader() {
this(FileInputType.BROWSER_INPUT);
}
/**
* Use a basic status widget, and creates
* a standard button to send the file
*
* @param type
* file input to use
*/
@UiConstructor
public SingleUploader(FileInputType type) {
this(type, null);
}
/**
* Creates a standard button to send the file
*
* @param type
* file input to use
* @param status
* Customized status widget to use
*/
public SingleUploader(FileInputType type, IUploadStatus status) {
this(type, status, new Button());
}
/**
* Constructor
*
* @param type
* file input to use
* @param status
* Customized status widget to use
* @param submitButton
* Customized button which submits the form
*/
public SingleUploader(FileInputType type, IUploadStatus status, Widget submitButton) {
this(type, status, submitButton, null);
}
/**
* This constructor allows to use an existing form panel.
*
* @param type
* file input to use
* @param status
* Customized status widget to use
* @param submitButton
* Customized button which submits the form
* @param form
* Customized form panel
*/
public SingleUploader(FileInputType type, IUploadStatus status, Widget submitButton, FormPanel form) {
super(type, form);
final Uploader thisInstance = this;
if (status == null) {
status = new BaseUploadStatus();
}
super.setStatusWidget(status);
this.button = submitButton;
if (submitButton != null) {
submitButton.addStyleName("submit");
if (submitButton instanceof HasClickHandlers) {
((HasClickHandlers)submitButton).addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
thisInstance.submit();
}
});
}
if (submitButton instanceof HasText) {
((HasText)submitButton).setText(I18N_CONSTANTS.uploaderSend());
}
// The user could have attached the button anywhere in the page.
if (!submitButton.isAttached()) {
super.add(submitButton);
}
}
}
/**
* Uses the standard browser input, customized status, and creates a
* standard button to send the file
*
* @param status
* Customized status widget to use
*/
public SingleUploader(IUploadStatus status) {
this(FileInputType.BROWSER_INPUT, status);
}
/**
*
* @param status
* Customized status widget to use
* @param submitButton
* Customized button which submits the form
*/
public SingleUploader(IUploadStatus status, Widget submitButton) {
this(FileInputType.BROWSER_INPUT, status, submitButton, null);
}
@Override
public void setEnabled(boolean b) {
super.setEnabled(b);
setEnabledButton(b);
}
/* (non-Javadoc)
* @see gwtupload.client.Uploader#setI18Constants(gwtupload.client.IUploader.UploaderConstants)
*/
@Override
public void setI18Constants(UploaderConstants strs) {
super.setI18Constants(strs);
if (button != null && button instanceof HasText) {
((HasText)button).setText(strs.uploaderSend());
}
}
/* (non-Javadoc)
* @see gwtupload.client.Uploader#onChangeInput()
*/
@Override
protected void onChangeInput() {
super.onChangeInput();
if (button != null) {
button.addStyleName("changed");
if (button instanceof Focusable) {
((Focusable)button).setFocus(true);
}
}
}
ArrayList<Widget> formWidgets = new ArrayList<Widget>();
public void add(Widget w) {
formWidgets.add(w);
super.add(w);
}
public void add(Widget w, int index) {
formWidgets.add(w);
super.add(w, index);
}
public void clear() {
for (Widget w : formWidgets) {
w.removeFromParent();
}
formWidgets.clear();
}
/* (non-Javadoc)
* @see gwtupload.client.Uploader#onFinishUpload()
*/
@Override
protected void onFinishUpload() {
super.onFinishUpload();
if (getStatus() == Status.REPEATED) {
getStatusWidget().setError(getI18NConstants().uploaderAlreadyDone());
}
getStatusWidget().setStatus(Status.UNINITIALIZED);
reuse();
assignNewNameToFileInput();
for (Widget i : formWidgets) {
if (i instanceof Hidden) {
Hidden h = (Hidden)i;
if (h.getValue().startsWith(fileInputPrefix)) {
h.setValue(getInputName());
}
}
}
getFileInput().asWidget().setVisible(true);
if (button != null) {
setEnabledButton(true);
button.removeStyleName("changed");
if (!autoSubmit) {
button.setVisible(true);
}
}
if (autoSubmit) {
getFileInput().setText(i18nStrs.uploaderBrowse());
}
}
/* (non-Javadoc)
* @see gwtupload.client.Uploader#onStartUpload()
*/
@Override
protected void onStartUpload() {
super.onStartUpload();
if (button != null) {
setEnabledButton(false);
button.removeStyleName("changed");
button.setVisible(false);
}
getFileInput().asWidget().setVisible(false);
}
public void setAvoidRepeatFiles(boolean b){
this.avoidRepeatFiles(b);
}
/* (non-Javadoc)
* @see gwtupload.client.Uploader#setAutoSubmit(boolean)
*/
@Override
public void setAutoSubmit(boolean b) {
if (button != null) {
button.setVisible(!b);
}
super.setAutoSubmit(b);
}
/**
* Add a customized Upload bar, used in Uibinder.
*/
@UiChild(limit = 1, tagname = "statusBar")
public void addStatusBar(IUploadStatus status) {
this.setStatusWidget((IUploadStatus) status);
}
/**
* Add any html button created with Uibinder.
* The content has to implement the interface HasClickHandlers
*/
@UiChild(limit = 1, tagname = "button")
public void addButton(Widget button) {
this.setFileInput(IFileInput.FileInputType.CUSTOM.with(button).getInstance());
}
}