We have a requirement of accessibility in our next application and we will need customized themes for this.
The first goal to achieve is to be able to increase and decrease the font size in the application. For this we will have two buttons, one to increase, the other to decrease the size of text in all components. You can use Enterprise Blue as a reference theme. You can see an example of this at the URL: http://emag.governoeletronico.gov.br/emag/#. You can click on "Aumentar Fonte " and "Diminuir Fonte".
Any idea how can i acheive this in GWT/SmartGWT
thanks
Short answer is RootPanel.getBodyElement().
The most Convenient way is to apply classes on body element.
There are multiple ways to do it.
RootPanel.get("body").setStyleName("newbodyclass"); //Not recommended.
Efficient way
RootPanel.getBodyElement().setClassName("newbodyclass"); //Recommended
Few new ways:
Document.get().getBody().setClassName("newbodyclass");
Finally best for you problem:
Document.get().getBody().getStyle().setFontSize(value, unit);
static Label lblNewLabel = new Label("New label");
Button btnNewButton = new Button("New button");
private int fontSize=10;
btnNewButton.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
fontSize += 5;
lblNewLabel.getElement().getStyle().setFontSize(fontSize , Unit.PX);
}
});
Related
I have a requirement wherein on a single click in the cell, normal editing must be possible and on double clicking in the cell a dialog should open for editing the cell. The two are possible individually. I see a method "boolean supportMultiEdit(IConfigRegistry configRegistry, List configLabels)" but there is no example to show the working. Has anyone used it or can show it's configuration.
Multi edit means it is possible to edit multiple cells at once. This is of course done in an editor, as it makes no sense to perform multi edit inline. You should rather have a look at openInline(IConfigRegistry, List<String>) or even better the EditConfigAttributes#OPEN_IN_DIALOG to solve what you are looking for.
But you are actually seeking for a way to handle opening an editor differently on different UI interactions. So you need to register the corresponding UI bindings. This is already discussed in the NatTable Forum.
And the EditorExample shows quite a lot of possible configuration options available for editing. And almost every editable example shows multi editing capabilities. You simply need to select multiple cells you want to edit and then start typing or pressing F2.
The following code would do the trick with a configuration based on a label that is added in the UI binding action:
public class OpenEditorConfiguration extends AbstractRegistryConfiguration {
#Override
public void configureRegistry(IConfigRegistry configRegistry) {
configRegistry.registerConfigAttribute(
EditConfigAttributes.OPEN_IN_DIALOG,
Boolean.TRUE,
DisplayMode.EDIT,
"open_in_dialog");
}
#Override
public void configureUiBindings(UiBindingRegistry uiBindingRegistry) {
uiBindingRegistry.registerDoubleClickBinding(
new CellEditorMouseEventMatcher(GridRegion.BODY),
new IMouseAction() {
#Override
public void run(NatTable natTable, MouseEvent event) {
int columnPosition = natTable.getColumnPositionByX(event.x);
int rowPosition = natTable.getRowPositionByY(event.y);
ILayerCell cell = natTable.getCellByPosition(columnPosition, rowPosition);
cell.getConfigLabels().add("open_in_dialog");
natTable.doCommand(new EditCellCommand(
natTable,
natTable.getConfigRegistry(),
cell));
}
});
}
}
I want to fetch an image from a remote server (not my app's server, but I don't think that matters) and display it in an existing Image widget. The existing widget displays its original content, from a ClientBundle ImageResource , OK.
In UiBinder template:
<g:Image ui:field='myImage' resource='{res.anImage}'/>
In code:
#UiField Image myImage;
...
int width = Window.getClientWidth();
int height = Window.getClientHeight();
String url = ...;
myImage.addErrorHandler(new ErrorHandler() {
public void onError(ErrorEvent event) {
Window.alert("Error getting image data: " + event);
}
});
myImage.addLoadHandler(new LoadHandler() {
public void onLoad(LoadEvent event) {
Window.alert("LoadEvent: " + event);
}
});
myImage.setUrlAndVisibleRect(url, 0, 0, width, height);
As far as I can tell setUrlAndVisibleRect is a no-op. FireBug reports no network activity -- no request to the server specified by the URL. What am I overlooking? In my extended thrashing about trying to get this working I have inferred that it may have something to do with myImage not being "logically attached", but I'm not entirely sure what that means and I've no idea how to correct it if that is the problem.
EDIT with SUMMARY of SOLUTION:
My initial hunch was right. Because I had chosen to implement the image code within a second pseudo-widget (...extends Composite) that shared my UiBinder template with the main pseudo-widget that implements most of my app's UI, I got into trouble. I neglected to add this second pseudo-widget to the RootPanel as is normally done in the class that implements EntryPoint. This left my Image widget unattached to the widget chain, because its parent, the second pseudo-widget, was unattached. And an Image widget must be attached to work. What I ended up doing is moving the Image code back into my main app/GUI class, i.e., into the first and now only pseudo-widget and abandoning the special class for the Image code. I did that because it's simpler and the Image code turns out not to be as long as I had originally thought.
Adding image to the DOM is little tricky,the below code which supports all the browsers(setVisibility trick added to support IE also,as It has a different way to image rendering).
I did'nt use setUrlAndVisibleRect before and AFAIK,Image must render to the DOM inorder to resize it.Just try the below codes.
image.addLoadHandler(new LoadHandler() {
#Override
public void onLoad(LoadEvent event) {
//Do your operations on image .//resize ..etc
image.getElement().getStyle().setVisibility
(Style.Visibility.Visible);
}
});
image.getElement().getStyle().setVisibility(Style.Visibility.HIDDEN);
RootPanel.get().add(image);
image.setUrl(url);
You are using ClientBundle ImageResource which is compile time. You cannot change it unless you replace the new image with exact name in the exact position of prev one. One of the possible hack which is possible is, place the image in a div with its ID set ( getElement().setId("your ID") ). Once you get you new image you use RootPanel.get("Your Id") and do your job.
The problem is on the drawing by click or resizing browser. I have TabPanel placed with RowData, two TabItems with Chart (Google Vizualization) on one and Table with the same Data on the next. I create them on the page loading.
Then I click on Load Data (button) from DB, I redraw this two:
public void reDraw(final List<Double> slices, final String[] devices)
{
pcPie.draw(createTable(slices,devices),createOptions("По автомобилям"));
tPie.draw(createTable(slices, devices),CreateTableOptions());
}
That's work only for active TabItem and replace the drawing space from behind with this size (400px;200px) in generated HTML and I find that Data isn't changed at the behind section.
Also, when I resized the browser, Charts and Tables aren't resizing. I've tryed to use some of Layout, they don't work. May be I don't understand exactly how can use them correctly.
So,
How can I resize my Charts and Tables correct in the both of the
section (active and behind)?
How can I resize my Charts and Tables
on the browser resizing events?
Our first problem came from this: when you use the TabPanel component with some TabItems, behind TabItems aren't being created exactly, and you can not redraw them, cause object isn't created. So we change our code in activated section:
public void run() {
tpLineCharts.setBorders(true);
TabItem tiGraph = new TabItem("График");
tableData = createTable();
lcLines = new LineChart(tableData,
createOptions("По компании"));
lcLines.addSelectHandler(createSelectHandler(lcLines));
tiGraph.setLayout(new FitLayout());
tiGraph.add(lcLines);
tpLineCharts.add(tiGraph);
TabItem tiTable = new TabItem("Таблица");
tLine = new Table(tableData, CreateTableOptions());
tiTable.add(tLine);
tiTable.addListener(Events.Select, new Listener<BaseEvent>()
{
#Override
public void handleEvent(BaseEvent be) {
tLine.draw(tableData);
}
});
tpLineCharts.add(tiTable);
}}, CoreChart.PACKAGE, Table.PACKAGE);
where tableData - AbstractTableData. After this modification we can redraw our components:
public void reDrawLineChart(final ArrayList <Double> sumCompanyTraffic,
final ArrayList<Integer> axisName, String title)
{
tableData =createTable(sumCompanyTraffic, axisName);
tLine.draw(tableData, CreateTableOptions());
lcLines.draw(tableData, createOptions(title));
}
Also you need to add this options:
private Options createOptions(String title)
{
Options options = Options.create();
options.setTitleX("Период");
options.setTitle(title);
if(tpLineCharts.isRendered())
options.setSize(tpLineCharts.getWidth(true),
tpLineCharts.getHeight(true));
return options;
}
I'm using a standard swt table which, as you may know, by default when an item is selected is colored blue (windows standard). When the selection is inactive, it turns light gray. I would like to override both colors... I've searched all over the web but could only find some very old code which no longer seems to work with the table widget.
Below is some sample code I was trying to overwrite the default color but it doesn't seem to be working (please excuse the dirty code, was just trying to get something to work):
table.addSelectionListener(new SelectionListener() {
#Override
public void widgetSelected(SelectionEvent event) {
Color rowSelectionColor =
new Color(Display.getCurrent(),new RGB(235, 200, 211));
TableItem item =(TableItem)event.item;
item.setBackground(0,rowSelectionColor);
item.setBackground(1,rowSelectionColor);
item.setBackground(2,rowSelectionColor);
}
#Override
public void widgetDefaultSelected(SelectionEvent event) {
Color rowSelectionColor =
new Color(Display.getCurrent(),new RGB(235, 200, 211));
TableItem item =(TableItem)event.item;
item.setBackground(0,rowSelectionColor);
item.setBackground(1,rowSelectionColor);
item.setBackground(2,rowSelectionColor);
}
});
Any ideas would be greaaatly massively appreciated :D
If you want to go with a TableViewer to manage your table, you can use a StyledCellLabelProvider to determine the colors/fonts/etc for individual cells. The TableViewer will take care of the "owner draw" aspects for you. The biggest hassle is setting up the ContentProvider, LabelProvider, and input classes that go with the TableViewer.
I want to click on an image and therefore want to register (e.g.) a ClickHandler. The image I get from a ClientResource. This works so far to set the image into a table cell:
MyResources.INSTANCE.css().ensureInjected();
Image colorImage = new Image( MyResources.INSTANCE.colorImage() );
Element colorImageElement = colorImage.getElement();
colorImage.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
System.out.println( event );
}
} );
TableElement table = Document.get().createTableElement();
TableRowElement headRow = table.insertRow(-1);
headRow.insertCell(-1).appendChild( colorImageElement );
RootPanel.get().getElement().appendChild( table );
How can I add a listener to the icon? I tried ClickHandler and to put the image on a PushButton and get the Element from this PushButton but all don't work.
But mind, if I add the widget (Image is a Widget) to a panel it works!
RootPanel.get().add( colorImage );
But I am not working with widgets here but with the Element. So the handler disappears and that's the point I don't get how to preserve this added handler information.
In the end I would like to build a table with different rows where I can click on the icon I get a popup menu and thereby change the colour of the row.
You should be able to just add a ClickHandler (or a MouseDownHandler if that fits your needs better).
Like this:
colorImage.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
// Do something....
}
});
Don't unwrap your widget and append only the DOM elements. The Widget class allows your code to refer to both elements and events at the same time, and deals with possible memory leaks, as well as grouping your code in logical ways.
This might make sense for other frameworks, but in GWT you almost always want to work with the Widgets directly, adding them together, then appending them to the RootPanel.
If you really want to use a html table to build this up, look at the com.google.gwt.user.client.ui.HTMLTable subclasses, com.google.gwt.user.client.ui.Grid and com.google.gwt.user.client.ui.FlexTable. This probably should never be necessary, unless you are adding multiple items to the table - when trying to specify layouts, use actual layout classes.
did you tried to add image.sinkEvents( Event.ONCLICK | Event.MOUSEEVENTS )?
The image has to be inside a focus widget. I don't know why that is, but somewhere the events don't get propagated right and the DOM events don't fire.