Doubts on LinearGradient#proportional=true

[Tom Schindl]

Have to correct myself :-( I think I'm the one responsible for the wrong
behavior. Looks like I'm not handling gradientTransform appropriately :-(

Am 08.06.12 17:17, schrieb Tom Schindl:
> But how does it then work if one uses a proportional=false and 0,0,1,0?
> 
> I'm trying to translate SVG linear gradients to FXML and it fails
> because of this behavior. I'm having a hard time understanding how I'd
> map their definition to FXML. For Rects calculating the offset would be
> easy.
> 
> Tom
> 
> Am 08.06.12 17:06, schrieb Richard Bair:
>> Perhaps you are being tripped up by the coordinate spaces. The rectangle is drawn at 40 in the x of it's coordinate system, and the gradient starts at 0. So the first 40px of gradient are to the left of the left edge of the rectangle. If the rect were at 0 you would see what you expect, I think. If you translate the rect vs move it you would see what you expected as well.
>>
>>
>>
>> On Jun 8, 2012, at 7:56 AM, Tom Schindl <tom.schindl at bestsolution.at> wrote:
>>
>>> here it is.
>>>
>>> The rect I get:
>>> http://www.efxclipse.org/screen.png
>>>
>>> The rect I expected:
>>> http://www.efxclipse.org/screen_expected.png
>>>
>>> Tom
>>>
>>> Am 08.06.12 16:48, schrieb Tom Schindl:
>>>> It looks like the image gets stripped. Let me upload it somewhere and
>>>> come back to you
>>>>
>>>> Tom
>>>>
>>>> Am 08.06.12 16:44, schrieb Pavel Safrata:
>>>>> Hi Tom,
>>>>> did you forget to attach the image or did the system strip it somewhere
>>>>> along the way? I executed your code and saw exactly what you expected -
>>>>> gradient in the left half of the rectangle, what do you see? By the way,
>>>>> the code uses proportional=false, unlike suggested in the description,
>>>>> so please try to clarify your question.
>>>>> Thanks,
>>>>> Pavel
>>>>>
>>>>> On 8.6.2012 16:33, Tom Schindl wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I'm not sure if i understood proportional true wrong or I'm found a
>>>>>> serious bug.
>>>>>>
>>>>>>> import java.util.ArrayList;
>>>>>>> import java.util.List;
>>>>>>>
>>>>>>> import javafx.application.Application;
>>>>>>> import javafx.scene.Group;
>>>>>>> import javafx.scene.Scene;
>>>>>>> import javafx.scene.paint.Color;
>>>>>>> import javafx.scene.paint.CycleMethod;
>>>>>>> import javafx.scene.paint.LinearGradient;
>>>>>>> import javafx.scene.paint.Stop;
>>>>>>> import javafx.scene.shape.Rectangle;
>>>>>>> import javafx.stage.Stage;
>>>>>>>
>>>>>>> public class TestGradient extends Application {
>>>>>>>
>>>>>>>    /**
>>>>>>>     * @param args
>>>>>>>     */
>>>>>>>    public static void main(String[] args) {
>>>>>>>        launch(args);
>>>>>>>    }
>>>>>>>
>>>>>>>    @Override
>>>>>>>    public void start(Stage primaryStage) throws Exception {
>>>>>>>        Group g = new Group();
>>>>>>>        Rectangle r = new Rectangle(40,0,90,75);
>>>>>>>        List<Stop>  stops = new ArrayList<Stop>();
>>>>>>>        stops.add(new Stop(0, Color.RED));
>>>>>>>        stops.add(new Stop(1, Color.BLUE));
>>>>>>>        LinearGradient lg = new LinearGradient(0, 0, 90, 0, false,
>>>>>>> CycleMethod.NO_CYCLE, stops);
>>>>>>>        r.setFill(lg);
>>>>>>>        g.getChildren().add(r);
>>>>>>>        Scene s = new Scene(g,200,200);
>>>>>>>        primaryStage.setScene(s);
>>>>>>>        primaryStage.show();
>>>>>>>    }
>>>>>>>
>>>>>>> }
>>>>>> Running this code gives me an UI like shown in the attached screenshot.
>>>>>> Is this really the right behaviour? I'd expect red to start on the left
>>>>>> of the rect and end at 1/2 of the width.
>>>>>>
>>>>>> Tom
>>>>>>
>>>>
>>>>
>>>
>>>
>>> -- 
>>> B e s t S o l u t i o n . a t                        EDV Systemhaus GmbH
>>> ------------------------------------------------------------------------
>>> tom schindl                 geschäftsführer/CEO
>>> ------------------------------------------------------------------------
>>> eduard-bodem-gasse 5-7/1   A-6020 innsbruck     fax      ++43 512 935833
>>> http://www.BestSolution.at                      phone    ++43 512 935834
> 
> 


-- 
B e s t S o l u t i o n . a t                        EDV Systemhaus GmbH
------------------------------------------------------------------------
tom schindl                 geschäftsführer/CEO
------------------------------------------------------------------------
eduard-bodem-gasse 5-7/1   A-6020 innsbruck     fax      ++43 512 935833
http://www.BestSolution.at                      phone    ++43 512 935834