we have website which is developed in Telidos platform which is using GWT in side it. but
In that website we need print functionality to be included. When the user clicks on print button, then the application should print the search criteria and the content from that page. I don't know how to implement it. I searched in all the places where i couldn't find any solution.
Please help me on this if anybody have any idea.
Jothi, In GWT we have everything in a GWT widget. It may be a RootPanel. VerticalPanel, SplitPanel ans so on. So try this,
For eg. If you to print a CellTable which is added in a VerticalPanel,
VerticalPanel vPanel = new VerticalPanel();
vPanel.add(cellTable);
Then print it by
String printText = vPanel.asWidget().getElement().getInnerHTML();
printMethod(printText);
And have the following method,
public static native void printMethod(String html) /*-{
var frame = $doc.getElementById('printing');
if (!frame) {
$wnd.alert("Error: Can't find printing frame.");
return;
}
frame = frame.contentWindow;
var doc = frame.document;
doc.open();
doc.write(html);
doc.close();
frame.focus();
frame.print();
}-*/;
where 'printing' is the iframe id.
<iframe id="printing" style="width:0;height:0;border:0">
</iframe>
This should be added in your *.ui.xml for the particular widget like
<g:Verticalpanel><iframe id="printing" style="width:0;height:0;border:0">
</iframe></g:Verticalpanel>
Related
I am trying to user Custom Drag appearance in smart gwt. how can i implement it.
Current when using DragAppearance.TRACKER its show on 10px square i want a lable with caption Drag to Lineup.
vLayout1.setDragAppearance(DragAppearance.TRACKER);
vLayout1.setCanHover(true);
vLayout1.setCursor(Cursor.HAND);
I hope, the following links will help you
https://github.com/moravianlibrary/MEditor/blob/master/editor-editation/src/main/java/cz/mzk/editor/client/view/ModifyView.java#L1100:L1104
https://github.com/moravianlibrary/MEditor/blob/master/editor-common/editor-common-client/src/main/java/cz/mzk/editor/client/view/other/EditorDragMoveHandler.java
Override BaseWidget.setDragTracker and provide required content using EventHandler.setDragTracker.
VLayout vLayout1 = new VLayout() {
#Override
protected boolean setDragTracker() {
EventHandler.setDragTracker("<pre>Drag to Lineup</pre>");
return false;
}
};
vLayout1.setCanDrop(true);
vLayout1.setCanDrag(true);
vLayout1.setDragAppearance(DragAppearance.TRACKER);
EventHandler.setDragTracker accepts any valid html code and <pre/> tags were used above to avoid word wrap.
Check following sample in SmartGWT showcase:
http://www.smartclient.com/smartgwt/showcase/#effects_dd_tracker
is it possible to inject a stylesheet into the head of a GWT RichTextArea
Seems as if i place a style element in the body, some browser e.g. IE7 allows the user to delete the node.
I had the same problem, here's the solution to add in the class constructor:
richTextArea.addInitializeHandler(new InitializeHandler() {
public void onInitialize(InitializeEvent ie) {
document = IFrameElement.as(richTextArea.getElement()).getContentDocument();
StyleElement se = document.createStyleElement();
se.setType("text/css");
se.setInnerHTML("some CSS");
BodyElement body = document.getBody();
body.getParentNode().getChild(0).appendChild(se);
}
});
StlyeInjector can directly insert CSS if you don't want to use a CSS file. It gets put into the head as far as I can tell, but for the whole document.
Yes it is. But you need a library like gwtquery to manipulate the dom, or code some jsni.
I'd rather gquery because of its simplicity and it will work with all browsers.
import static com.google.gwt.query.client.GQuery.*;
// First attach the widget to the DOM
RootPanel.get().add(richTextArea);
// We only can manipulate the head, once the iframe document has been created,
// and this happens after it has been attached.
// Because richtTextArea uses a timeout to initialize we need a delay.
$(richTextArea).delay(1,
lazy()
.contents()
.find("head")
.append("<style> body{background: red} </style>")
.done());
With GWT + JSNI you have to do something like this (not tested in all browsers though):
// First attach the widget to the DOM
RootPanel.get().add(richTextArea);
// We only can manipulate the head, once the iframe document has been created,
// and this happens after it has been attached.
// Using a timer because richtTextArea uses a timeout to initialize.
Timer insertCss = new Timer() {
private native Element getHeadElement(Element iframe) /*-{
return iframe.contentWindow.document.head;
}-*/;
public void run() {
Element head = getHeadElement(richTextArea.getElement());
Element style = DOM.createElement("style");
style.setInnerText("body{background: yellow}");
head.appendChild(style);
}
};
// Schedule the timer
insertCss.schedule(1);
I'm using a GWT library (gwt-openlayers) which allows me to create a map popup containing arbitrary HTML, similar to Google Maps. I need this HTML to contain a GWT Button widget.
I'm creating some HTML elements on-the-fly like this:
Element outerDiv = DOM.createDiv();
outerDiv.getStyle().setOverflow(Overflow.HIDDEN);
outerDiv.getStyle().setWidth(100, Unit.PCT);
outerDiv.appendChild(new HTML(mapPOI.getHtmlDetails()).getElement());
Button popupButton = new Button("View Property");
popupButton.getElement().getStyle().setFloat(com.google.gwt.dom.client.Style.Float.RIGHT);
outerDiv.appendChild(popupButton.getElement());
Then I'm getting the source HTML for these elements by calling
String src = outerDiv.toString();
and inserting this html into my map marker. Now my map marker displays the content ok, including the button. However, the button won't respond to any events! From what I can gather, this is because the buttons onAttach() method is never being called.
Is there a better way to do this?
Thanks,
Jon
~~~~EDIT~~~~
I'm now trying a new way of doing this, which seems to be the accepted method looking at other similar posts.
First I'm creating my div:
String divId = "popup-" + ref;
String innerHTML = "<div id=\"" +divId + "\"></div>";
Then I'm adding this to my map popup and displaying it (which adds it to the DOM). After the popup has been displayed, I'm getting the Element as follows and trying to wrap a HTMLPanel around it:
Element element = Document.get().getElementById(divId);
HTMLPanel popupHTML = HTMLPanel.wrap(element);
My div element is successfully retrieved. However, HTMLPanel.wrap(element); doesn't complete. The reason for this is that wrap(..) calls RootPanel.detachOnWindowClose(Widget widget), which includes the following assertions:
assert !widgetsToDetach.contains(widget) : "detachOnUnload() called twice "
+ "for the same widget";
assert !isElementChildOfWidget(widget.getElement()) : "A widget that has "
+ "an existing parent widget may not be added to the detach list";
I put some breakpoints in and it seems that the 2nd assertion is failing!
Does anybody have any idea why this might be the case? Should failing this assertion really result in a complete failure of the method (no return)?
Your first approach is good, you just need to register onClick event for your button like this:
DOM.sinkEvents(popupButton.getElement(), Event.ONCLICK);
DOM.setEventListener(popupButton.getElement(), new EventListener() {
#Override
public void onBrowserEvent(Event event) {
//implement the logic after click
}
});
I have checked this, it works 100%!
You might try something like
RootPanel.get("idOfYourMapMarker").add(popupButton);
See RootPanel.get()
Unfortunately, RootPanels are AbsolutePanels which aren't so nice for layout but could work if you just have a simple button to add. You could also try RootLayoutPanel which will give you a LayoutPanel (also not so nice when you just want things to flow). You might end up creating a container widget that does the layout for you, and adding that to the RootPanel.
SimplePanel is a DIV. Perhaps that can be used instead?
You added the element, but you have to keep the hierarchy of the actual GWT Widgets too.
I don't see a clean way to do this, but you could use something like jQuery to grab the button by and ID and add a click handler back to it that would call the original click handler.
private static native void registerEvents(String buttonId, MyClass instance)/*-{
var $ = $wnd.$;
//check click
$('#'+buttonId).live('click', function(e) {
e.preventDefault();
instance.#com.package.MyClass::handleButtonClick(Lcom/google/gwt/event/dom/client/ClickEvent;)(null);
});
}-*/;
Call this registerEvents() either in your onAttach or constructor.
I once had a similar problem. You can use the gwt-openlayer's MapWidget as follows:
private MapWidget createMapWidget() {
final MapOptions defaultMapOptions = new MapOptions();
defaultMapOptions.setDisplayProjection(DEFAULT_PROJECTION);
defaultMapOptions.setNumZoomLevels(TOTAL_ZOOM_LEVELS);
MapWidget mapWidget = new MapWidget(MAP_WIDGET_WIDTH, MAP_WIDGET_HEIGHT, defaultMapOptions);
map = mapWidget.getMap();
return mapWidget;
}
And then add it to any panel be it vertical or horizontal.
MapWidget mapWgt = createMapWidget();
VerticalPanel mainPanel = new VerticalPanel();
mainPanel.add(mapWgt);
...
... add whatever you want
...
You can finally add the created Panel(containing the MapWidget and the gwt widget) to the PopupPanel. Also, you should now be able to add handlers to the gwt button.
I have a simple GWT app that takes source code in a TextArea, sends it to a remote compiler, and displays the assembly language output and compiler errors in some other TextAreas. The code below works fine in Safari and Chrome, but the TextAreas and Buttons aren't resized to fill the panels in Firefox. I can manually set the sizes of the widgets to 100% and it's almost acceptable, but surely I'm missing some important bit of CSS knowledge. I am setting the document type to the strict HTML4 DTD ("http://www.w3.org/TR/html4/strict.dtd"). The app is running at http://ferret.granberrys.us:8080/Compiler.html.
RootLayoutPanel rootPanel = RootLayoutPanel.get();
DockLayoutPanel panel = new DockLayoutPanel(Unit.EM);
codeArea = new TextArea();
codeArea.setText("int main() {return 0};");
DockLayoutPanel outputPanel = new DockLayoutPanel(Unit.EM);
ListBox compiler = new ListBox();
compiler.addItem("Clang/LLVM");
outputPanel.addNorth(compiler, 2);
assemblyArea = new TextArea();
assemblyArea.setText("Asm");
Button compileButton = new Button();
compileButton.setText("Compile");
outputPanel.addSouth(compileButton, 2);
outputPanel.add(assemblyArea);
panel.addEast(outputPanel, 20);
compilerOutput = new TextArea();
compilerOutput.setReadOnly(true);
compilerOutput.setText("Compiler");
//panel.addWest(codeArea, 800);
panel.addSouth(compilerOutput, 10);
panel.add(codeArea);
rootPanel.add(panel);
According to the documentation you should use <!DOCTYPE html>, but Iḿ not sure if that is the problem here. It also could be the TextArea is a span element, or at least not a css block element. You can do this by adding display:block to the specific widgets.
I've been working with GWT for awhile, I can't find a way to integrate it with a preexisting website which is a real downer. My page content is already generated for me using jsp, like:
<div id='A'></div>
<div id='B'></div>
etc.
there is no way for me to do something like this though:
public void onModuleLoad() {
SimplePanel spA = new SimplePanel(
Document.getElementById("A"));
spA.add(new Label("hello"));
SimplePanel spB = new SimplePanel(
Document.getElementById("B"));
spB.setWidth("200px");
etc ..
}
seems like there's no way to just wrap a pre-existing element. Is this true, or am I missing how to do this? I need be able to wrap a bunch of elements like this, to manipulate them later on. I see TextBox, Button, a few other classes have wrap() methods, however nothing like that exists for elements,
Thanks
There is a way to wrap existing DOM elements, like Label's wrap() method. For example:
Label label = Label.wrap(DOM.getElementById("A"));
label.setText("Foo!");
Other GWT classes can wrap DOM elements too, like Button, and CheckBox using its constructor.
Use HTMLPanel:
class MyPanel extends HTMLPanel {
private SimplePanel a = new SimplePanel();
private SimplePanel b = new SimplePanel();
public MyPanel() {
super("<div id="a"></div><div id="b"></div>);
addAndReplaceElement(a, "a");
addAndReplaceElement(b, "b");
}
}