Simple Portal Sample (Smart GWT)
/*
* SmartGWT (GWT for SmartClient)
* Copyright 2008 and beyond, Isomorphic Software, Inc.
*
* SmartGWT is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3
* as published by the Free Software Foundation. SmartGWT is also
* available under typical commercial license terms - see
* http://smartclient.com/license
* This software 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
* Lesser General Public License for more details.
*/
package com.smartgwt.sample.showcase.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.Random;
import com.google.gwt.user.client.ui.RootPanel;
import com.smartgwt.client.types.Alignment;
import com.smartgwt.client.types.DragAppearance;
import com.smartgwt.client.types.HeaderControls;
import com.smartgwt.client.types.LayoutPolicy;
import com.smartgwt.client.types.Overflow;
import com.smartgwt.client.types.VerticalAlignment;
import com.smartgwt.client.widgets.AnimationCallback;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.Label;
import com.smartgwt.client.widgets.Window;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.ButtonItem;
import com.smartgwt.client.widgets.form.fields.StaticTextItem;
import com.smartgwt.client.widgets.layout.HLayout;
import com.smartgwt.client.widgets.layout.LayoutSpacer;
import com.smartgwt.client.widgets.layout.VLayout;
import com.smartgwt.client.widgets.layout.VStack;
public class Showcase implements EntryPoint {
public void onModuleLoad() {
RootPanel.get().add(getViewPanel());
}
//FCKEditor like colors
private static String[] colors = new String[]{
"FF6600", "808000", "008000", "008080", "0000FF", "666699",
"FF0000", "FF9900", "99CC00", "339966", "33CCCC", "3366FF",
"800080", "969696", "FF00FF", "FFCC00", "FFFF00", "00FF00",
"00FFFF", "00CCFF", "993366", "C0C0C0", "FF99CC", "FFCC99",
"FFFF99", "CCFFCC", "CCFFFF", "99CCFF", "CC99FF", "FFFFFF"
};
public Canvas getViewPanel() {
final PortalLayout portalLayout = new PortalLayout(3);
portalLayout.setWidth100();
portalLayout.setHeight100();
// create portlets...
for (int i = 1; i <= 2; i++) {
Portlet portlet = new Portlet();
portlet.setTitle("Portlet");
Label label = new Label();
label.setAlign(Alignment.CENTER);
label.setLayoutAlign(VerticalAlignment.CENTER);
label.setContents("Portlet contents");
label.setBackgroundColor(colors[Random.nextInt(colors.length - 1)]);
portlet.addItem(label);
portalLayout.addPortlet(portlet);
}
VLayout vLayout = new VLayout(15);
final DynamicForm form = new DynamicForm();
form.setAutoWidth();
form.setNumCols(5);
final StaticTextItem numColItem = new StaticTextItem();
numColItem.setTitle("Columns");
numColItem.setValue(portalLayout.getMembers().length);
ButtonItem addColumn = new ButtonItem("Add Column");
addColumn.setIcon("silk/application_side_expand.png");
addColumn.setAutoFit(true);
addColumn.setStartRow(false);
addColumn.setEndRow(false);
addColumn.addClickHandler(new com.smartgwt.client.widgets.form.fields.events.ClickHandler() {
public void onClick(com.smartgwt.client.widgets.form.fields.events.ClickEvent event) {
portalLayout.addMember(new PortalColumn());
numColItem.setValue(portalLayout.getMembers().length);
}
});
ButtonItem removeColumn = new ButtonItem("Remove Column");
removeColumn.setIcon("silk/application_side_contract.png");
removeColumn.setAutoFit(true);
removeColumn.setStartRow(false);
removeColumn.setEndRow(false);
removeColumn.addClickHandler(new com.smartgwt.client.widgets.form.fields.events.ClickHandler() {
public void onClick(com.smartgwt.client.widgets.form.fields.events.ClickEvent event) {
Canvas[] canvases = portalLayout.getMembers();
int numMembers = canvases.length;
if (numMembers > 0) {
Canvas lastMember = canvases[numMembers - 1];
portalLayout.removeMember(lastMember);
numColItem.setValue(numMembers - 1);
}
}
});
final ButtonItem addPortlet = new ButtonItem("Add Portlet");
addPortlet.setIcon("silk/application_view_tile.png");
addPortlet.setAutoFit(true);
addPortlet.setStartRow(false);
addPortlet.setEndRow(false);
addPortlet.addClickHandler(new com.smartgwt.client.widgets.form.fields.events.ClickHandler() {
public void onClick(com.smartgwt.client.widgets.form.fields.events.ClickEvent event) {
final Portlet newPortlet = new Portlet();
newPortlet.setTitle("Portlet ");
Label label = new Label();
label.setAlign(Alignment.CENTER);
label.setLayoutAlign(VerticalAlignment.CENTER);
label.setContents("Portlet contents");
label.setBackgroundColor(colors[Random.nextInt(colors.length - 1)]);
newPortlet.addItem(label);
newPortlet.setVisible(false);
PortalColumn column = portalLayout.addPortlet(newPortlet);
// also insert a blank spacer element, which will trigger the built-in
// animateMembers layout animation
final LayoutSpacer placeHolder = new LayoutSpacer();
placeHolder.setRect(newPortlet.getRect());
column.addMember(placeHolder, 0); // add to top
// create an outline around the clicked button
final Canvas outline = new Canvas();
outline.setLeft(form.getAbsoluteLeft() + addPortlet.getLeft());
outline.setTop(form.getAbsoluteTop());
outline.setWidth(addPortlet.getWidth());
outline.setHeight(addPortlet.getHeight());
outline.setBorder("2px solid #8289A6");
outline.draw();
outline.bringToFront();
outline.animateRect(newPortlet.getPageLeft(), newPortlet.getPageTop(),
newPortlet.getVisibleWidth(), newPortlet.getViewportHeight(),
new AnimationCallback() {
public void execute(boolean earlyFinish) {
// callback at end of animation - destroy placeholder and outline; show the new portlet
placeHolder.destroy();
outline.destroy();
newPortlet.show();
}
}, 750);
}
});
form.setItems(numColItem, addPortlet, addColumn, removeColumn);
vLayout.addMember(form);
vLayout.addMember(portalLayout);
return vLayout;
}
/**
* Portlet class definition
*/
private class Portlet extends Window {
public Portlet() {
setShowShadow(false);
// enable predefined component animation
setAnimateMinimize(true);
// Window is draggable with "outline" appearance by default.
// "target" is the solid appearance.
setDragAppearance(DragAppearance.OUTLINE);
setCanDrop(true);
// customize the appearance and order of the controls in the window header
setHeaderControls(HeaderControls.MINIMIZE_BUTTON, HeaderControls.HEADER_LABEL, HeaderControls.CLOSE_BUTTON);
// show either a shadow, or translucency, when dragging a portlet
// (could do both at the same time, but these are not visually compatible effects)
// setShowDragShadow(true);
setDragOpacity(30);
// these settings enable the portlet to autosize its height only to fit its contents
// (since width is determined from the containing layout, not the portlet contents)
setVPolicy(LayoutPolicy.NONE);
setOverflow(Overflow.VISIBLE);
}
}
/**
* PortalColumn class definition
*/
private class PortalColumn extends VStack {
public PortalColumn() {
// leave some space between portlets
setMembersMargin(6);
// enable predefined component animation
setAnimateMembers(true);
setAnimateMemberTime(300);
// enable drop handling
setCanAcceptDrop(true);
// change appearance of drag placeholder and drop indicator
setDropLineThickness(4);
Canvas dropLineProperties = new Canvas();
dropLineProperties.setBackgroundColor("aqua");
setDropLineProperties(dropLineProperties);
setShowDragPlaceHolder(true);
Canvas placeHolderProperties = new Canvas();
placeHolderProperties.setBorder("2px solid #8289A6");
setPlaceHolderProperties(placeHolderProperties);
}
}
/**
* PortalLayout class definition
*/
private class PortalLayout extends HLayout {
public PortalLayout(int numColumns) {
setMembersMargin(6);
for (int i = 0; i < numColumns; i++) {
addMember(new PortalColumn());
}
}
public PortalColumn addPortlet(Portlet portlet) {
// find the column with the fewest portlets
int fewestPortlets = Integer.MAX_VALUE;
PortalColumn fewestPortletsColumn = null;
for (int i = 0; i < getMembers().length; i++) {
int numPortlets = ((PortalColumn) getMember(i)).getMembers().length;
if (numPortlets < fewestPortlets) {
fewestPortlets = numPortlets;
fewestPortletsColumn = (PortalColumn) getMember(i);
}
}
fewestPortletsColumn.addMember(portlet);
return fewestPortletsColumn;
}
}
}
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