Re: [platform-swt-dev] trivial work about setting layout data -- need im

[zhong nanhai <higerinbeijing@xxxxxxxxx>]

Hi Shwan:

Yes, that's what I need, although this necessary functionality exists
in JFace other than SWT.

Then thank you very much.

higer

On 3/5/10, Shawn Minto <shawn.minto@xxxxxxxxxxx> wrote:
> Hi higer,
>
> If you use JFace, there is a GridDataFactory class that makes it
> really easy to set this information.  It provides you will utility
> methods to create and set all of the fields on GridData that you can
> chain together and apply to a control i.e.
>
> Button btn1 = new Button(shell, SWT.PUSH);
> GridDataFactory.swtDefaults().grab(true,true).applyTo(btn1);
>
> This sounds similar to what you are looking for.  There is still some
> duplication, but it is shorter and easier to setup the layout data
> than setting the fields directly.
>
> Shawn
>
> On Thu, Mar 4, 2010 at 7:22 PM, zhong nanhai <higerinbeijing@xxxxxxxxx>
> wrote:
>> Hi, guys:
>>
>> As is known to everyone, we often use layout and layout data to show
>> our controls in a composite panel when using SWT, but don't you find
>> it's very trivial and boring to set the layout data?
>>
>> Everytime we layout a control we have to create a new ***Data(e.g.
>> GridData) and set its prapameters in a proper way, and when we create
>> another control which have the same layout requirements, we then
>> always create a complete new ***Data and set it step by step, it's
>> boring and it sucks! The following is a simple example:
>>
>> .................
>> Button btn1 = new Button(shell, SWT.PUSH);
>> GridData data = new GridData();
>> data.grabExcessHorizontalSpace = true;
>> data.grabExcessVerticalSpace = true;
>> data.***=**
>> data.***=**
>> btn1.setLayoutData(data);
>> Button btn2 = new Button(shell, SWT.PUSH);
>> /* Then all the following steps are complete the same*/
>> data = new GridData();
>> data.grabExcessHorizontalSpace = true;
>> data.grabExcessVerticalSpace = true;
>> data.***=**
>> data.***=**
>> btn2.setLayoutData(data);
>> ................
>>
>>
>> So, I think SWT should provide a new way to do this work, for example,
>> SWT can provide a clone method to a layout data object , and when we
>> set another control, we just need to clone an old layout data object
>> and set some parameters if necessary, then this work could become
>> every easy. The above code may look like this:
>>
>> ...............
>> Button btn1 = new Button(shell, SWT.PUSH);
>> GridData data = new GridData();
>> data.grabExcessHorizontalSpace = true;
>> data.grabExcessVerticalSpace = true;
>> data.***=**
>> data.***=**
>> btn1.setLayoutData(data);
>> Button btn2 = new Button(shell, SWT.PUSH);
>> /* more simple way to create a layout data*/
>> data = data.clone();
>> data.grabExcessHorizontalSpace = false; // just need to modify the
>> necessary parameters
>> btn2.setLayoutData(data);
>>
>> .................
>>
>> So, what a wonderful job!
>>
>> I do not know why such a method doesn't exist in SWT and I want to do
>> some improvements , then I need you guys' good advices and directions
>> about this idea.
>>
>> Many thanks!
>>
>>
>> Best wishes to everyone,
>> higer
>> _______________________________________________
>> platform-swt-dev mailing list
>> platform-swt-dev@xxxxxxxxxxx
>> https://dev.eclipse.org/mailman/listinfo/platform-swt-dev
>>
>
>
>
> --
> Shawn Minto
> shawn.minto@xxxxxxxxxxx
> Tasktop Technologies, Inc.
> http://www.tasktop.com
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