Hello,
how can I change the size of an image resource that is used in the
following way?
public static interface SelectionImages extends ImageBundle {
@Resource(image.png)
AbstractImagePrototype selectionAll();
}
Thank you!
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I have a gwt canvas which should take the whole space of the main centered
contend in a docklayout.
g:DockLayoutPanel unit='PCT'
//...
g:center
g:Label
c:Canvas...
/g:Label
/g:center
Now, If I resize the browser window, I do NOT want the painted graphics to
be resized. Only
I'm creating some kind of drawings/flowchart/UML-diagram like tool with GWT
Canvas (Java).
For hit-detection of my drawings I could imagine 3 different strategies,
but I do not know which would work best for my goal.
- Just keep track of all Shape coordinates and iterate all objects on
Hi,
I want to create some inner FocusPanels, and align them in percent (PCT).
But I can even not align just 2 Panels to a PCT size:
g:DockLayoutPanel unit='EM'
g:north size='20'
g:HorizontalPanel
g:FocusPanel width='90%'g:LabelLeft/g:Label/g:FocusPanel
I know how to use images in general with uibinder, like:
.ui.xml:
g:Image resource='{res.image}' /
.java:
public interface Resources extends ClientBundle {
@Source(image.png)
@ImageOptions(repeatStyle = RepeatStyle.None)
ImageResource image();
}
But in case of static images, how can
Can't I do this plain in uibinder?
Thanks
Am Donnerstag, 27. Dezember 2012 13:56:14 UTC+1 schrieb Jens:
horizontalPanel.setCellWidth(firstFocusPanel, 90%);
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Hi,
I have an image (little arrow) that I want to display in all cardinal
directions.
Using @ImageOptions(fliprtl...) I could at least flip the image so that I
would only have to pre-create half of the needed images.
BUT isn't there an option to rotate the image with an angle, so that only 1
What I just found out:
g:HorizontalPanel width=100%
g:cell width='90%'
g:FocusPanel...
What do you think of aligment with g:cell to wrapp the focus panels?
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Hi,
how can I vertically center elements within a FlowPanel? I have several
FocusPanels inside a FlowPanel, which means they are stacked on each other.
One of the focuspanels has an image, which should be centered both
horizontally and vertically within that focuspanel. But no matter what I
Hi,
is it possible to retrieve the name of an element that triggers an event?
For example, if I have a FocusPanel which triggers a MouseOverEvent, can I
get the variable name of that panel somehow from the event?
@UiField
FocusPanel panel;
@UiHandler(panel)
void mouseOver(MouseOverEvent ev) {
Hi,
I want to have a FocusPanel without any content, but it should trigger some
MouseFocus events.
Are there any spacer elements in GWT which I could place into the
FocusPanel?
At the moment I'm just using a transparent little image that I place into
the FocusPanel by:
g:FocusPanel
g:Image
From eg TextBox I know that it is possible to alter the css style of an
element by setting the dependentName like this:
textBox.setStyleDependentName(readonly, true);
.gwt-TextBox-readonly {
background-color: lightgrey;
border: none;
}
How can I do the same with FocusPanel?
I tried
I have several same components that at this stage just perform the same
operation.
g:FocusPanel ui:field=panel
g:FocusPanel ui:field=panel2
g:FocusPanel ui:field=panel3
@UiField
FocusPanel panel, panel2, panel3;
@UiHandler(panel)
void handleClick(MouseDownEvent event) {
//...
}
I know I can just bind any ui component to any events by using @UiHandler
like this:
g:FocusPanel ui:field=panel
@UiField
FocusPanel panel;
@UiHandler(panel)
void handleClick(MouseDownEvent event) {
//...
}
So far so good, but how can I manually add a mouse handler within the
class
Is there something to attach multiple Handlers to the same component?
Similar to the following (which is not valid of course, but you get it):
@UiHandler(myComponent)
void onMouseDown(MouseDownEvent ev | MouseOutEvent ev) {
//...
}
Or do I necessarily have to create 2 different handler
Hi,
I'm trying to apply a dropshadow around a DockLayoutPanel area. But can't
get it to work:
.shadow {
-moz-box-shadow: 3px 3px 4px #000;
-webkit-box-shadow: 3px 3px 4px #000;
box-shadow: 3px 3px 4px #000;
/* For IE 8 */
-ms-filter:
How could I center everything that is placed eg in the north/east/west/south
segment of a docklayoutpanel?
The following does not work...
ui:style
.align {
float: center;
}
/ui:style
g:DockLayoutPanel
g:north styleName='{style.align}'g:LabelA/g:Label/g:north
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Hi,
I have expanded the Tree element and add each one SelectionHandler,
OpenHandler, CloseHandler to my Custom Tree class.
The problem is: whenever I close a tree, then first the SelectionHandler is
executed, and then the CloseHandler.
All other things work fine: if I open the tree, only
I'm creating a custom Tree component which extends the GWT Tree.
But how can I use my custom tree with ui:binder??
I tried the following which did not work:
my custom tree:
public class CustomTree extends Tree {
public CustomTree() {
//...
}
}
MyPanel.ui.xml:
ui:UiBinder
Hi,
when looking at eg VerticalPanel, I can provide optional parameters like width
and height via ui-binder.
I only found @UiConstructor, but this would force the ui:binder to provide
the parameters for the constructor annotated like this.
How can I create these kind of additional parameters
Hi,
how can I add selection row highlighting to a tree widget? Or is this ever
possible?
Thanks
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Ok I see, so just by providing setter methods I can add optional params.
Thanks, exactly what I was looking for.
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It did not work until I found that there seems to be a bug:
http://code.google.com/p/google-web-toolkit/issues/detail?id=3800q=tree%20item%20selectedcolspec=ID%20Type%20Status%20Owner%20Milestone%20Summary%20Stars
.gwt-Tree .gwt-TreeItem-selected {
display: table !important;
}
worked for me.
If this would work (cannot test this atm), then this would mean I have to
apply the center style to each of the elements contained in the panel.
But that's exactly what I'm trying to avoid, and why I'm looking for a
solution to just tell the whole panel to center everything that is
contained
How can I center an image using uibinder?
This is what I tried and does not work:
.myImage {
horizontal-align: bottom;
vertical-align: bottom;
text-align: bottom;
}
g:SimplePanel styleName={style.myImage}
g:Image styleName={style.myImage}/
/g:SimplePanel
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The following Label is not bold. What am I missing here?
ui:style
.gwt-label {
font-style: bold !important;
}
/ui:style
gwt:Labelbold/gwt:Label
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I'm having problems in getting started with GWT Validation. I just want to
validate some form fields on a page.
I started like this, but don't know how to go on:
class Person {
@Size(min = 4, message = Name too short.)
private String name;
Person(name) {
this.name = name;
}
}
Thanks for that comprehensive answer. Helps me alot!
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Yes I know this side. But it still does not tell me:
- how to validate the name before creating the person object (which I'm
looking for in terms of numbers like int age; There I'd first like the
validator to catch if it's a valid age before creating the person object)
- how to display an
Hi,
I have a textbox where I want to user to only enter digits. Moreover I want
to prevent him entering other characters. This is what I tried but it does
not work:
@UiHandler(textbox)
void onInputsKeyPress(KeyPressEvent event) {
if (!Character.isDigit(event.getCharCode())) {
Hi,
I'm creating a canvas where the user can draw some elements himself.
Is it possible with GWT to preserve the user session somehow? And if he
refreshes the browser, all his drawings should be still there / beeing
recreated?
Coming from JSF I'd just use @SessionScoped, but how can this be
I was not aware of the editor framework. This looks very promising!
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Hi,
as far as I can see a GWT Tree has no ValueChangeHandler by default (for
modifying elements in the tree).
Therefore I'm trying to extend the Tree and add a ValueChangeHandlermy myself.
But it never get's called:
class MyTree extends Tree implements ValueChangeHandlerString {
//never
Hi,
how can I add available cell types (TextCell, ButtonCell, CheckboxCell,
DateCell etc) to a *CompositeCell*?
https://developers.google.com/web-toolkit/doc/latest/DevGuideUiCellWidgets?hl=en#available
ListHasCellFoo, ? cells = new ArrayListHasCellFoo,?();
cells.add(new ButtonCell()); //not
Hi,
I have serveral classes that extend from a baseclass. I display them in a
CellTree.
Now, if a specific class (Cat) is displayed, I want this class to have
subentries. Similar to:
Dog1
Dog2
Cat1
- Age Cat1
Dog3
Dog4
How can I achieve this??
class Animal {
//every animal gets a name
Hi,
I have a CellTree and displaying an image/icon with IconCellDecorator.
Now on a specific event I want to change icon. Can I do this with this
class, or what can I take to achieve this?
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On selection of a child item in a CellTree, I can get the selected item by:
MyItem item = selectionModel.getSelectedObject();
How can I tell if MyItem has a parent? Or that it is not a root element?
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I have a CellTree with a SingleSelectionModel.
onSelectionChange(SelectionChangeEvent
event) gets fired for all children, but not for the root node.
How can I add selection on the root??
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Gosh, I did not think about adding different selection models. This makes
it very easy to track indeed!
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Forget it, I forgot to add a selectionModel to the root...
Am Freitag, 11. Januar 2013 12:42:10 UTC+1 schrieb membersound:
I have a CellTree with a SingleSelectionModel.
onSelectionChange(SelectionChangeEvent
event) gets fired for all children, but not for the root node.
How can I add
Hi,
I have a CellTree with SingleSelectionModel. It has a SelectionChangeHandler
which fires onSelectionChange.
BUT how can I track if an already selected item is clicked again? In this
case at least the onSelectionChange is NOT executed (or course, but how can
I track it then?).
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Hi,
I have a CellTree where onSelection I change a specific element.
BUT if I reselect an element that was selected before, the changed value is
NOT updated in the view. Only if I fold and unfold the tree I see the
changed value visually.
Question: how can I fore the tree to refresh itself
ListDataProvider.
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Hi,
I have a CellTree with few root items and each having a lot of childs. When
I expand a node, I can click show more, which will then expand the rest
of the data invisible down below.
I'm not getting any scrolling controls. Only thing I can do is tap down
with the keyboard.
How can I add a
Ok I now created a HashMapMyItem, ListDataProviderMyItem for holding a
reference to all subItems, and the key is the parent item.
And for each refresh I first detect the subItem, get its parent, retrieve
the subDataProvider from the HashMap using the parent, and then forcing
the.refresh()on
Hi,
I'm trying to build a CellTree where Right and Left click perform the same
action. I already have the left click implemented, everything works fine.
I'm trying to attach a right-click handler to a CellTree. Therefore I
extend the tree and override onBrowserEvent().
The rightclick already
Hi,
how can I get scolling in a website that is composide by an outer enclosing
DockLayoutPanel?
My page consists of the DockLayoutPanel having north, south, east, west,
center.
Now if I shrink the window everything is shrunk accordingly. Which is quite
nice if working with PCT.
BUT if the
Ok thanks for your opinion!
I played around with this a bit, and probably you're right that best
approach is to have fixed header/footer and a scrollable content area in my
case.
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I simply want a button to be aligned bottom.
Apart from the fact that the following does not work, also the button loses
its GWT style completely. What am I missing here?
ui:style
.bottom {
vertical-align: bottom;
}
/ui:style
g:FlowPanel
g:HTMLPlaceholderbr/br//g:HTML
Hi,
I have a ValueBoxEditorDecorator defined, and want to highlight the TextBox if
an error appears on validation of the input:
@UiField
ValueBoxEditorDecoratorString name;
e:ValueBoxEditorDecorator ui:field='name'
e:valuebox
g:TextBox /
/e:valuebox
/e:ValueBoxEditorDecorator
Hi,
how can I size a Canvas dynamically? I have a DockLayoutPanel, and a Canvas
inside
the g:center element.
I use canvas.setSize(100%, 100%) to make it fill the whole center area.
BUT how can I setCoordinateSpaceHeight() and width? How do I know the size
of the canvas inside the center
I alread though about extending ResizeComposite as a Wrapper for the
canvas. But it gives me the following error:
java.lang.AssertionError: LayoutComposite requires that its wrapped widget
implement RequiresResize
Else if I use:
extends Composite implements RequiresResize {
@Override
OK so assuming I have a wrapper class for the canvas that is placed in the
center element, I can get the size of the center-panel by:
this.getElement().getParentElement().getClientWidth();
I don't know if this is the proper way, but at least it works.
BUT again I could not get the
How do I have to make reference to images under src/main/resources/icons?
In my css (placed under src/main/webapp):
.my-class {
background: url(../resources/icons/image.gif);
}
I'm constantly getting [WARN] 404 - GET
/resources/icons/validation_error_icon.gif (127.0.0.1) 1427 bytes.
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Could you give me the link of your working example?
My layout looks like this (stripped down to the canvas concerning elements):
g:SplitLayoutPanel
g:center
g:DockLayoutPanel
g:center
g:SplitLayoutPanel
g:center
g:DockLayoutPanel
g:center
c:Canvas
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Horray, ResizeLayoutPanel did the trick, thanks!
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Hi,
I draw ellipses on a canvas on click, and want to remove them on
doubleclick.
Therefor I track them in a list with coordinates tracked, and iterate if on
mouseclick. I'm already detecting if an element is under mouseclick or not.
BUT: how do I remove that element from the canvas? Would I
Hi,
I'm trying to add a ChangeEvent to a ValueListBox using the ui:binder way.
But it gives an exception. What do I have to change?
@UiField(provided = true)
ValueListBoxFoo list = new ValueListBoxFoo(renderer);
@UiHandler(list)
void onSelectionChange(ChangeEvent event) {
Hi,
how can I execute a ValueListBox.remove(int index) kind of statement?
I can only see setValue(Foo foo) but how to I take it away?
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Hi,
how can I execute statements after the whole application has started up?
Some kind of afterInit() method.
Is there anything beside placing these calls at the end of the EntryPoint
onModuleLoad().
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Great, works this way!
Am Montag, 28. Januar 2013 17:15:29 UTC+1 schrieb Jens:
In addition, keep in mind that ValueListBox currently merges its current
selected value to the list of acceptable values if its not already in this
list.
If you want to remove the selected value from the
and it compiles OK:
@UiField(provided=true) ValueListBoxString l = new
ValueListBoxString(PassthroughRenderer.instance());
@UiHandler(l)
void foo(ValueChangeEventString e) {
}
On Monday, January 28, 2013 4:21:21 PM UTC+1, membersound wrote:
Ja I tried this before, but:
Parameter
Hi,
I have a g:Tree / defined in ui:binder.
Now if I check a specific Checkbox, I want that Tree to be converted to a
CellTable
(to provide some quick inplace edit).
Again if I uncheck the box, I want reconversation to Tree.
How could I do this? I mean, how can I exchange Tree widget by a
Hi,
I have a custom rendered CellTree, therefore a class CustomCell extends
AbstractCellMyItem.
What do I have to change to make these cells inPlace editable?
I tried changing it to extend AbstractEditableCell. Also the isEditing()method
gets called when I click an item. But how can I now
Hi,
I defined a file upload. I do not want to send the file to the server, but
instead directly show the content (txt file) to the user. How could I do
this: getting the content of the file? What am I missing?
@UiField FormPanel form;
@UiField FileUpload upload;
@UiField Button submit;
Ok then I probably have to introduce a servlet.
But somehow I cannot get it working. The servlet is already called on
submit, BUT the file somehow never reaches the servlet.
ServletFileUpload upload = new ServletFileUpload(new DiskFileItemFactory());
//items.size() is always = 0. Why???
Got it working by providing an abitrary name property for the FileUpload.
Another issue: I'm retreiving the servlet response by evt.getResults().
But how could I return eg a status code (Error, Ok) apart from that?
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Hi,
I want to serialize a bunch of objects to a file, and later derserialize it.
The purpose is to let a user draw something on a canvas, save the objects
representing the drawing to a file, and later continue it's work.
So I'm probably looking for a way of JSON. I read of JSNI and GWT Overlay
Hi,
I would like to create a popup every hour that reminds the user to save his
work (of course only if the work has not been saved for 1 h).
What is the right way to do this?
timer.scheduleRepeating(TIME);
and on save: timer.cancel()?
Probably it works this way, but would this consume decent
Hi,
what is the best way to create a download file on the client side, when the
content that is to be saved also only exists on the client side?
Do I have to write a Servlet creating a file of the content that is send
from the client side?
Or is there any possibility to just make an export
Is there any way of sending content to the server and generating the
downloadable file without submitting this content in the URL as parameter
to the servlet?
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Hi,
I created a servlet that provides a downloadable file (from String content)
by writing to the ServletOutputStream.
On the client side, I trigger the file download by an Anchor with:
Window.open(GWT.getModuleBaseURL() + MyServlet, _blank, );
It works fine, BUT it seems to open a new browser
, GWT.getModuleBaseURL() + MyServlet)
On Friday, February 1, 2013 4:57:06 PM UTC+1, membersound wrote:
Hi,
I created a servlet that provides a downloadable file (from String
content) by writing to the ServletOutputStream.
On the client side, I trigger the file download by an Anchor with:
Window.open
Hi,
I have a main page layout defined with a DockLayoutPanel. Each north south
center etc is split into single classes as the code gets very big.
Now, I want to pass a label from north to the class Foo.
1. How can I pass this label best using uibinder?
2. Why does the following code not work
Hi,
how can I best align gwt components side by side?
I want to create a header element, which has a centered Label, and some
menu entries aligned to the right. Like:
This is my Header!Save | Export | Cancel
How can I achieve this? I read about creating a FlowPanel and
Hm just another issue: I also want the servlet url to have some query
parmeters like MyServlet?param=content.
But the content is dynamic, especially not available on construction of the
Anchor.
How can I pass this content on click into the targetLink of the Anchor
before it gets executed?
The
Hi,
what does a IllegalStateException mean for a DialogBox?
java.lang.IllegalStateException: This widget's parent does not implement
HasWidgets
at
com.google.gwt.user.client.ui.Widget.removeFromParent(Widget.java:204)
at
Hi,
I serialize one of my beans with AutoBeanCodex.encode(bean).getPayload();
But when I'm trying to import and decode the same string, I do not want the
AutoBean Proxy Object. I just want to have the JSONObject itself.
The following will still give me the AB Proxy. How can I get the real
Hi,
I'd like to create a 2-row spreadsheet/excel like component. Is there
anything build in for GWT (I did not find so far)? I cannot use frameworks
for this.
Or what could suit best to create such a component (2 rows, inplace edit,
edit on double click etc)?
Thanks a lot
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Hi,
I have an Anchor that onClick performs an RPC call to a servlet. Based on
the outcome I want to set the hRef of the Anchor, and then perform the open url
action of the Anchor.
BUT: how can I tell the anchor to wait for the Callback to finish before
trying to open the url?
@UiField
Anchor
Hi,
I have a simple FlowPanel which stacks some widgets:
g:FlowPanel
g:Label /
g:CheckBox /
g:MyCustomComposite /
g:DataGrid /
/g:FlowPanel
As I want to also display a DataGrid, I need to change the FlowPanel to
something that ProvidesResize (otherwise the datagrid does not show up).
BUT:
Hi,
I have a HTMLPanel which wraps several components.
If I enclose this with a DockLayoutPanel and place it into the center, it
is not rendered anymore.
g:DockLayoutPanel unit=PCT
g:center
g:HTMLPanel
g:Buttonbr/br/
g:Label
/g:HTMLPanel
/g:center
/g:DockLayoutPanel
Why am I
Hi,
is it possible to add c:TextColumn to a c:DataGrid?
Something like:
c:DataGrid
c:TextColumn /
c:TextHeader /
/c:DataGrid
I did not find any docs on how to use it.
Or is this impossible and the only way is defining new TextColumn() in the
java class?
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Hi,
I like the EditTextCell, but I want to override the template interface to
give the text in the input field eg a different aligment.
How can I override the interface Template when extending EditTextCell?
If not possible, what could I do apart from copying the whole EditTextCell
and modify
Hi,
I have a CellTable and would like the entry fields to behave like a
excel/spreadsheet table.
I'm using EditTextCell columns. But when I click an entry, the TextInput
has not the same alignment than the underlying label entry.
I don't know why gwt does not provide this behaviour out of the
Hi,
I know I can change the hovering style for a whole column in a CellTable using
.cellTableHoveredRowCell.
But how can I define hovering border only of the actual hovered entry of a
column? Is that even possible?
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And further questions:
.cellTableKeyboardSelectedCell {
border: selectionBorderWidth solid black;
}
When I press ENTER and while changing the content, I want the border to be
dashed:
border: selectionBorderWidth dashed black;
How could I implement this, as there is no property in CellTable
Hi,
how can I change a specific css style property during runtime?
I have a CellTable.Resource to define cellTable style MyCellTable.css.
Now I want to change a specific css property during runtime.
.cellTableKeyboardSelectedCell {
border:
}
How can I access my css file during runtime and
Hi,
how can I show Widgets upon a Canvas?
I want to display a TextBox in a specific position onto a canvas.
I guess the right way is to add the TextBox to the canvas-wrapping Panel?
And is so, how can I align the box then?
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Hi,
I have a CellTable with EditTextBox. How can I attach a custom event
handler to the InputElement that is created if I click an entry?
(My goal is to allow only numbers for a certain TextBox, which is easy
using KeyPressEvent. But how can I attach this to that box?)
Thanks
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Hi,
looking at NativeEvent extends JavaScriptObject: how can I detect if the
event was a number?
I tried using Character.isDigit(event.getKeyCode()), but this would give me
an error:
The method isDigit(char) in the type Character is not applicable for the
arguments (int)
How could I else
Because NumberCell is not an editable Cell?
Am Samstag, 9. Februar 2013 15:54:36 UTC+1 schrieb Andrea Boscolo:
Why not using
http://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/cell/client/NumberCell.html?
On Saturday, February 9, 2013 3:43:43 PM UTC+1, membersound
Hi,
I have a CellTable whose values come from a ListDataProvider. The entries
are editable with EditTextCell.
Now if I change a value in one of the fields, the value is visually changed
in the CellTable.
BUT every EditTextBox.onBrowserEvent() still has the initial String value.So
obviously
Hi,
maybe I'm missing something, but is there any
reasoncom.google.gwt.event.dom.client.KeyCodesdoes not contain KEY_SPACE
= 32?
Is this contained in a different class? Or omitted for any reason?
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Hi,
I have a CellTable with some Columns using EditTextCell.
How can I give the cell entry which was last edited a different style?
I have a FieldUpdater overriding the update(int index, ...) method. Can I
make use of this index to somehow style the cell with that index? How can I
get the
Hi,
I tried using java.util.UUID on the client side to generate some unique
id's for a list that will be placed into a CellTable.
Unfortunately GWT does probably not support UUID on the client side??
No source code is available for type java.util.UUID; did you forget to
inherit a required
Hi,
can I make use of the new Elemental
(https://developers.google.com/web-toolkit/articles/elemental) to have
access to the HTML5 FileAPI?
Are there any examples yet? Is that yet possible?
Thanks
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I'm exporting a canvas content as String to a servlet, to generate
downloadable file. But the resulting file is not viewable. What could I be
missing
Send to servlet:
String content = canvas.toDataUrl(image/png);
Servlet handling:
response.setHeader(Content-Disposition, attachment;
I want to show a panel inside a dialogbox. But the box remains empty. What
am I missing:
DialogBox box = new DialogBox(true, true);
box.setText(test);
Image image = new Image(); //getting any image somewhere
DockLayoutPanel dp = new DockLayoutPanel(Unit.PCT);
dp.addNorth(image, 100);
Hi,
first of all: where can I find the DecoratedTabPanel.css? I want to apply
custom styles to it, but I could not find the css styles to be overwritten
anywhere.
My goal ist to vertically show the tab headers on the left like a menu, and
their content on the right side.
Thanks
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