My Graphiti editor has shape that represents db table with it rows.. i am looking for a way to add scroll bar to my shape. any one know how to do that?
I've found an answer to this question.
This is the link to use: https://www.eclipse.org/forums/index.php/t/1071551/
I've created my own ScrollFigure, which extends draw2d ScrollPane and implements IGraphicsAlgorithmRenderer.
public class ScrollFigure extends ScrollPane implements IGraphicsAlgorithmRenderer {
#Override
public void setLayoutManager(LayoutManager manager) {
super.setLayoutManager(new ScrollPaneLayout());
}
}
Next you just have to adjust sizes of your figures in your custom factory, which instantiates your ScrollFigure, and scrollbars will be shown.
Related
Edit
Since no one has responded to my original question I think it is worthwhile adding a description of what I am attempting to accomplish, in addition to the existing description of how I have attempted to achieve my goal:
My objective is to create a DataGrid that will resize according to any change in size of its container. This is not difficult to do, but I have an additional requirement, which is to have Panel widgets above and below the DataGrid; these two Panel widgets will contain widgets that are fixed in size (e.g., a row of buttons or text input widgets). My expectation was that a HeaderPanel would be perfect for this, but this doesn't seem to work (as can be seen in my original question, below). So ... an alternative to my original question ("why doesn't this work") is: what is the best way to implement this requirement?
My original question:
I have a DataGrid in the content area of a HeaderPanel, but the detail lines in the DataGrid are not being displayed (the DataGrid column headings are showing, however). Is there an issue with using a DataGrid in the content area of a HeaderPanel? Or is this a simple misuse of the widgets? I'm adding the HeaderPanel to the RootLayoutPanel, which should provide the necessary resize notification (I think). Here is my UiBinder code:
<ui:UiBinder
xmlns:ui='urn:ui:com.google.gwt.uibinder'
xmlns:g='urn:import:com.google.gwt.user.client.ui'
xmlns:c='urn:import:com.google.gwt.user.cellview.client'>
<g:HeaderPanel>
<g:SimplePanel/>
<g:ResizeLayoutPanel>
<c:DataGrid ui:field='dataGrid'/>
</g:ResizeLayoutPanel>
<g:HorizontalPanel>
<g:Button
ui:field='addRecordButton'
text='Add Record'/>
<g:Label ui:field='numberOfRecordsLabel'/>
</g:HorizontalPanel>
</g:HeaderPanel>
</ui:UiBinder>
and here is the Java code:
public class TempGWT implements EntryPoint {
#UiField
Button addRecordButton;
#UiField
DataGrid<Record> dataGrid;
#UiField
Label numberOfRecordsLabel;
private ArrayList<Record> _recordList;
interface TempGWTBinder extends UiBinder<Widget, TempGWT> {
}
private static class Record {
private String _field1;
}
#Override
public void onModuleLoad() {
_recordList = new ArrayList<Record>();
TempGWTBinder binder = GWT.create(TempGWTBinder.class);
Widget widget = binder.createAndBindUi(this);
Column<Record, String> field1Column = new Column<Record, String>(new TextInputCell()) {
#Override
public String getValue(final Record record) {
return record._field1;
}
};
dataGrid.addColumn(field1Column, "Field 1");
RootLayoutPanel.get().add(widget);
}
#UiHandler("addRecordButton")
public void onAddRecordButtonClick(final ClickEvent event) {
Record record = new Record();
record._field1 = "Record " + (_recordList.size() + 1);
_recordList.add(record);
dataGrid.setRowData(_recordList);
numberOfRecordsLabel.setText("Records:" + _recordList.size());
}
}
I've attempted to trace the execution and, although I'm not certain, it looks as though the following happens when I change the size of the browser window and the "resize" request is received by the DataGrid (I've skipped some of the "unimportant" methods):
DataGrid#onResize
HeaderPanel#forceLayout
ScrollPanel#onResize
The DataGrid object contains a HeaderPanel, which contains the headings for the DataGrid and a ScrollPanel. I don't know whether this is the key to the problem, but the ScrollPanel in the DataGrid's HeaderPanel contains a DataGrid$TableWidget object, and TableWidget does not implement RequiresResize; the ScrollPanel#onResize method only sends the resize to its child if the child implements RequiresResize.
The Tables and Frames section of the GWT Developer's Guide makes it clear that I just needed to use a width/height of 100% for the DataGrid! Like so:
<c:DataGrid
ui:field='dataGrid'
width='100%'
height='100%'/>
can we add a mousewheel event to absolute panel in GWT. I have added a mousewheel event to absolute panel but it is not working .Why this problem is there but if I add it to label then its working properly.
Thanks,
It is because the AbsolutePanel does not implements the HasAllMouseHandlers interface specifically HasMouseWheelHandlers. Label implements HasMouseWheelHandlers interface. So it works for Label.
You have to extend AbsolutePanel and implement HasMouseWheelHandlers interface to make it work with AbsolutePanel. And behavior you have to define.
public class MyAbsolutePanel extends AbsolutePanel implements HasMouseWheelHandlers
{
public HandlerRegistration addMouseWheelHandler(MouseWheelHandler handler)
{
// Define the behavior here.
return addDomHandler(handler, MouseOutEvent.getType());
}
}
I want to use the CaptionPanel inside a Layout Panel (DockLayoutPanel) .
The problem is that there is no CaptionLayoutPanel(like SimpleLayoutPanel) implementation and therefore if I want to use
this panel inside a Layout Panel, all childs will loose the resize events because the "resize-chain" is broken through the CaptionPanel.
Is there any workaround?
Extend CaptionPanel and implement the ProvidesResize and RequiresResize interfaces
CustomCaptionPanel extends CaptionPanel implements RequiresResize,ProvidesResize {
public void onResize() {
if (getContentWidget() instanceof RequiresResize) {
((RequiresResize) getContentWidget()).onResize();
}
}
The easiest solution is not to use CaptionPanel.
If you want children to respond to resize events, add a layer to your LayoutPanel that will hold a caption (Label), and another layer that will contain a child widget that you want to respond to resize. You can style these widgets any way you like (e.g. a Label can look like a tab or a panel with some background and rounded corners, etc.)
An alternative solution is style your CaptionPanel as Roddy of the Frozen Peas suggested, and then add a ResizeHandler to your window. When triggered, you can set the size of a child widget to
myChildWidget.setSize(myCaptionPanel.getOffsetWidth() + "px", myCaptionPanel.getOffsetHeight() + "px");
I have a TabLayoutPanel where I am putting custom widgets in for the tabs to be able to display some images next to the text. I originally worked with TabPanel and using custom HTML for the tab text, but custom tab widgets allows me to modify the image on the fly as needed.
My tab widget is essentially a HorizontalPanel, a number of small images, and a line of text. The problem I'm having is that the tab doesn't want to stick to the bottom of the tab bar like normal. The tab is getting positioned at the top of the space reserved for the tab bar, and there's a gap between it and the bottom of the tab bar. I uploaded an image of the problem to http://imgur.com/fkSHd.jpg.
Is there some style that I need to apply to custom widget tabs to make them appear correctly?
In my brief experience, the newer standards mode panels (they all end in "LayoutPanel") don't get along with the older ones (the ones that just end in "Panel"). So you might consider trying a DockLayoutPanel instead of the HorizontalPanel, and it may be more cooperative.
See https://developers.google.com/web-toolkit/doc/latest/DevGuideUiPanels, particularly the section called "What won't work in Standards Mode?":
HorizontalPanel is a bit trickier. In some cases, you can simply
replace it with a DockLayoutPanel, but that requires that you specify
its childrens' widths explicitly. The most common alternative is to
use FlowPanel, and to use the float: left; CSS property on its
children. And of course, you can continue to use HorizontalPanel
itself, as long as you take the caveats above into account.
After a bit more research, I found the answer here: https://groups.google.com/d/msg/google-web-toolkit/mq7BuDaTNgk/wLqPm5MQeicJ. I had to use InlineLabel or InlineHTML widgets instead of normal Label or HTML widgets. I've tested this solution and it does exactly what I want. I pasted the code of the class below for completeness. Note two things here:
The "float" attribute cannot be set on the last element (the InlineLabel) or the incorrect drawing condition occurs again.
The code could be cleaned up a bit further by having the class extend directly from FlowPanel instead of making it a composite containing a FlowPanel.
package com.whatever;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style.Float;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.InlineLabel;
public class StatusTab extends Composite
{
public interface StatusImages extends ClientBundle
{
public static StatusImages instance = GWT.create(StatusImages.class);
#Source("images/status-green.png")
ImageResource green();
#Source("images/status-red.png")
ImageResource red();
}
private final ImageResource greenImage;
private final ImageResource redImage;
private final FlowPanel flowPanel;
public LinkStatusTab(String text, int numStatuses) {
greenImage = StatusImages.instance.green();
redImage = StatusImages.instance.red();
flowPanel = new FlowPanel();
initWidget(flowPanel);
for (int i = 0; i < numStatuses; i++)
{
Image statusImg = new Image(redImage);
statusImg.getElement().getStyle().setMarginRight(3, Unit.PX);
statusImg.getElement().getStyle().setFloat(Float.LEFT);
flowPanel.add(statusImg);
}
flowPanel.add(new InlineLabel(text));
}
/**
* Sets the image displayed for a specific status entry.
*/
public void setStatus(int which, boolean status)
{
Image image = (Image)flowPanel.getWidget(which);
if (status)
image.setResource(greenImage);
else
image.setResource(redImage);
}
}
I have a couple of composite widgets which all have dymaincally sizing object within them.
When I instantiate a composite widget I would like it to fill its container as a percentage, say 80% for example.
Each of the objects within the widget will grow to fit inside the composite regardless of composites size but the composite itself wont grow as a percentage of its container.
Is this even possible? I have tried the .setWidth() method but this won't recognise a % asd an argument.
I am not setting the size within the composite widget class.
I have a calling class that instantiates the composite widget and then calls the setWidth() method on the new object.
I will try out your method and if it works then apply it to my problem. I will post again once I have some more information.
Thankyou for your help :-)
Ofcourse it is possible.Composite setWidth() method recognizes % also.Can you give me the sample code you are using? Make sure that calling of setWidth() method must be after the initwidget() call of your composite.try like this
public class Widget1 extends Composite{
private VerticaPanel panel=new VerticalPanel();
public Widget1(){
initWidget(panel);
setWidth("80%");
panel.add(new Widget2());
}
}
public class Widget2 extends Composite{
private VerticaPanel panel=new VerticalPanel();
public Widget2(){
initWidget(panel);
setWidth("100%");
}
}
Here is my test composite class:
**class CompositePane extends Composite {
//Define a panel that contains everything
private VerticalPanel compositePanel = new VerticalPanel();
private Button button1 = new Button("Button1");
public CompositePane(){//Start StatusPane constructor
compositePanel.add(button1);
initWidget(compositePanel);
setWidth("100%");
addStyleName("compositePanel");
}//End of StatusPane constructor
}//End of StatusPane class**
Here is my style attached to this object that shows the edges of the composite object:
.compositePanel{
**border: 5px solid black;
}**
When using a set value of pixels the border expands as expected.
When using 100%, it sit tightly around the button, where I need it to touch the outside edge of its container.
Thanks.Where you are adding this CompositePanel. CompositePanel.setWidth("100%") method makes this compositePanel to use it parents 100% width.So in your case its parent width is less.Try the following example .You will understand that what to do in your code.Now borders width will be 800px.
VerticalPanel parentPanel=new VerticalPanel();
parentPanel.setWidth("800");
parentPanel.add(new CompositePanel());
RootPanel.get().add(parentPanel);