Is there a way to create a "standalone" scrollbar in SWT? I would like to have a scrollbar which I have full control over myself and use it to control the contents of another widget in a way which isn't possible with the "built-in" scrollbars in the Table widget, for example.
I agree that you probably can't get a scrollbar alone, but I've worked around that with using a Canvas ( or ScrolledComposite ) and then set the content of that composite to exactly the same size as the ScrolledComposite.getClientArea(). That may require a bit fine tuning and you have to make sure that the content component resizes together with the ScrolledComposite, but should be possible.
You can then get the Scrollbars of the ScrolledComposite and use them independently of the ScrolledComposite.
You can use the SWT Slider widget for this purpose.
SWT Snippet number 17 for code Example: http://git.eclipse.org/c/platform/eclipse.platform.swt.git/tree/examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet17.java
No, I don't think so. If you look at the jni call for the table, you'll see that it's just a flag into the native call. I'm pretty sure that you can't do what you ask. You could however use Draw2D to get this done fairly quickly. Create a FigueCanvas with eith an XYLayout or a ColumnLayout (I think that's what it's called) and off you go.
There is a better solution!
If you use a ScrolledComposite and use the ScrollBars, the setLocation(int,int) function is called of the internal control to adjust it to the scrollbar position.
If you override this function to really set the location to (0,0), the internal control will not be scrolled anymore.
Related
Does anybody have any idea on how to easily implement a image list(like the windows explorer with medium icons) control with swt? it seems like that it could be done easily with CListCtrl in c++ on windows, but does not seem to be easy with swt? any hints are appreciated!
Up to me, you need to create your own widget (check e.g. http://www.snip2code.com/Snippet/11489/Custom-SWT-List-Box) and add composite items to your custom list.
If vertical-only scrolling is enough, I suggest you rely on a single column TableViewer. This is what I did in a project where I needed a gallery-like window allowing the user to pick a graphical component based on displayed thumbnails.
You just need to implement the proper TableLabelProvider.getColumnImage and return the desired thumbnail corresponding to your list entry.
That gives a pretty decent list-like rendering.
In addition, TableViewer API is very well documented.
I am currently working with the SWT package in Eclipse. Is it possible to create a resizable control within a composite control.
For instance, if I have a tree control which I would like to expand, but in order to view the sub tree items I would like to 'click and drag' the border of the tree to resize it, much like the draggable divider in the Eclipse help website.
I think the SWT Sash is what you are looking for.
Here is a good example on how to use it.
EDIT:
Just found that SashForm is much easier to use. See LINK for a good example.
I need a scrollPanel with a verticalpanel and a tablayout panel inside it. Problem is, unless I specify the exact height of the tablayoutPanel, the tab content does not show. Any known fixes/ workarounds?
Not the answer you are looking for, but might spark an idea for another way to do this - what does it mean to scroll a tab panel? As soon as the user starts scrolling down, the tabs will no longer be visible to change tabs, user will always need to scroll all the way to the top to consider any other tab.
That said, any of the *LayoutPanel classes GWT has introduced that implement ProvidesResize, RequiresResize, etc need sizing to properly draw themselves and their content. This is why you are having the issue. These classes are designed to size their children, not to just consume as much space as those children require.
Closest I can suggest to a workaround (except for putting a ScrollPanel inside the TabLayoutPanel instead) would be to know the height of the current tab's contents, add to that the height of just the tabs themselves, and assign that as the height of the tabpanel. Not a very nice solution, but it might get you by.
This sounds like a pretty simple thing to do but I havent been able to find an easy way to do this. How do I create a panel with a title and a border which can contain my widgets? I have seen the SectionStack class which provides this. But I dont want to create a section stack.
Window can be added to a layout and drawn. But is it the only way or is there a container class that I am missing?
Also, how does one center things? Say a textfield and a button at the center of the page. How is this achieved?
If you are using a DynamicForm, you can give it a border and title with
form.setIsGroup(true);
form.setGroupTitle(title);
This actually works for Canvas, too (which is the superclass of most widgets and layouts in SmartGWT).
(I just had the same problem, and found this question, as well as the thread Is there a "titled Border" on the SmartGWT Forums, which gave this answer. I tried and it seems to work.)
To do form-related tasks, look into DynamicForm. To set the inputs in the form, you use setItems(Item...). A text field is a TextItem. You set it's title to control the label that SmartGWT will build. To get a title for the form, the best I've come up with is to use a container canvas that will contain both the title (probably a Label element) and the DynamicForm. To center the inputs, I believe you'd need to use setAlignment on the DynamicForm.
You could create an object that is actually a VLayout that contains a Label (the tile), has a border as you need and includes a Canvas (the generic stuff you want included).
In my experience, I noticed that very often I have a DynamicForm visible, so I just add a BlurbItem control to diplay the tile and a small explanation.
Is there a way to put GTK+ widgets in a stack? I.e. put a button over label so that button covers a part of label.
You can use GtkFixed as the layout. This will allow you to control exact locations of the child widgets, and they can overlap.
You'd have to use a Canvas control to explicitly set the positions of the controls - GTK+ works hard to not do what you're describing :)
Packing inside a GtkTable appears to allow this, though I didn't test very far - just juggled it in glade a little.
I'm curious what you're looking to use this to achieve.