I use one JTextArea and JScrollBar. It has this problem when I run it and it will fill by text, I can't navigate it. i.e. when I click on arrowkey on scrolbar, nothing happen. although I write the update code for it (by using API), but it doesn't work well. What shall i do? Thanks in advance.
I show my code as bellow:
JTextArea Result_field = new JTextArea(5,10);
Result_field.setPreferredSize(new Dimension(5, 10));
JScrollPane scrollPane = new JScrollPane( Result_field );
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
DefaultCaret caret = (DefaultCaret)Result_field.getCaret();
caret.setUpdatePolicy(DefaultCaret.ALWAYS_UPDATE);
PrintStream printStream = new PrintStream(new CustomOutputStreamm(Result_field));
System.setOut(printStream);
MainPanel.add(scrollPane,gbc);
I found out my problem, although we define one JTextArea or ... by the size, But after that we should determine the prefer size again.
Related
Running the following code snippet under VS 2010 using iTextSharp 5.5.6:
PdfReader reader = new PdfReader("Test.pdf");
FileStream fs = new FileStream("New.pdf", FileMode.Create);
PdfStamper p = new PdfStamper(reader, fs);
AcroFields form = p.AcroFields;
...
RadioCheckField newField = new RadioCheckField(p.Writer, new iTextSharp.text.Rectangle(20, 20), "MyCheckBox", "Off");
PdfFormField RadioField = newField.CheckField;
p.AddAnnotation(RadioField, 1);
I receive the error "ITextSharp errror "Off is not a valid name for a checkbox appearance (should be Off or Yes)" at the line declaring the RadioField object. Is this a bug? How do I work around it?
A check box can have two values:
one you define yourself in your method. That will be the value of the check box when selected.
one that is defined in ISO-32000-1: Off. That's the value of the check box when it's not selected.
There is a bug in your code because you are trying to create a check box of which the value is always Off whether it's selected or not.
Choose another value. Off is reserved for the off state. You need yo define a value for the on state. ISO-32000-1 recommends Yes.
This is how you make sure the check box is selected:
newField.Checked = true;
Unchecked is done like this:
newField.Checked = false;
//created a JScrollPane and when i run it the scrollbars will automatically go to the most bottom of my textarea, but i need it to be on top.
thank you in advance! =)
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(22, 86, 262, 57);
content.add(scrollPane);
//the text area used
JTextArea txtrTryingTryingTrying = new JTextArea();
scrollPane.setViewportView(txtrTryingTryingTrying);
txtrTryingTryingTrying.setText("-------");
I've been trying as well, and found a solution.
There is a useful method called: setCaretPosition(int)
After you use
component.setText("Text here");
You must use
component.setCaretPosition(0); //0 will set it to the top
In your case, you must add setCaretPosition() after setText
JTextArea txtrTryingTryingTrying = new JTextArea();
scrollPane.setViewportView(txtrTryingTryingTrying);
txtrTryingTryingTrying.setText("-------");
txtrTryingTryingTrying.setCaretPosition(0);
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.
In my eclipse RCP application there are a few buttons & few input boxes & this below Text component. My problem is as soon as I press one of the buttons a cursor starts blinking in the below test component. Can you please let me know how to solve this.
I tried:
setting focus to false for Text.
SWT.READ_ONLY for Text .
Code:
Cursor cursor = new Cursor(parent.getDisplay(), SWT.CURSOR_NO);
protocolFilterDescription.setCursor(cursor);
Nothing seems to get rid of this unnecessary cursor.
protocolFilterDescription = new Text(parent, SWT.NONE | SWT.READ_ONLY );
FormData protocolFilterDescriptionLData = new FormData();
protocolFilterDescriptionLData.left = new FormAttachment(0, 1000, 650);
protocolFilterDescriptionLData.top = new FormAttachment(0, 1000, 290);
protocolFilterDescriptionLData.width = 450;
protocolFilterDescriptionLData.height = 12;
protocolFilterDescription.setLayoutData(protocolFilterDescriptionLData);
protocolFilterDescription.setForeground(new Color(parent.getDisplay(),
204, 153, 0));
protocolFilterDescription.setBackground(Display.getCurrent()
.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
protocolFilterDescription.setFont(new Font(parent.getDisplay(),"Verdana",
6, 1));
protocolFilterDescription
.setText("captured");
You have to set the focus of some other SWT component to true to remove the focus from the Text component.
You'll probably have to do this in an ActionListener.
If you want to completely remove the cursor from the Text control (which implies inability to perform a selection there, etc), try calling setEnabled(false) on it.
Also, such requirement suggests that you maybe don't need Text component at all, and could use Label instead.