CODEWITHSUNDEEP
javaswing
user402642
user402642

Reputation:

Java Swing; Problems with Java GraphicsConfiguration.getBounds() returning 0

It seems that the .getBounds() method of the GraphicsConfiguration class is not reporting the correct values.

   GraphicsDevice[] gdArr = GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices();

        int width = 0;
        for (GraphicsDevice gd : gdArr)
        {
            if (gd.getType() == gd.TYPE_RASTER_SCREEN)                                                
                System.out.println("Value is: " + gd.getDefaultConfiguration().getBounds().getX());                
        }

I have two monitors: running 1920 * 1080 and 1280 * 1080.

I get the following values:

for .getX() I get:

Value = 1920
Value = 0

for .getY() I get:

Value = 0
Value = 0

I'm running on a Linux platform with Nvidia's Twinview. Is this a bug outside of Swing?

Upvotes: 2

Views: 1272

Answers (2)

Sam Ginrich
Sam Ginrich

Reputation: 841

On Windows 10/Java 8 the ratio of text scaling factors goes into coordinates of secondary screens.

E.g. Two screens, widths 1920 + 1600 with common border line, both text scaling 125%

Bounds java.awt.Rectangle[x=0,y=0,width=1920,height=1080]
Bounds java.awt.Rectangle[x=1920,y=174,width=1600,height=900]

Now, when the text scaling of the second screen is changed to 100%, I get

Bounds java.awt.Rectangle[x=0,y=0,width=1920,height=1080]
Bounds java.awt.Rectangle[x=2400,y=218,width=2000,height=1125] .

The bounds of the second screen appear scaled by 125%. This is to be considered, e.g. when capturing all screens, which independent from text scaling will produce a section

Bounds java.awt.Rectangle[x=1920,y=174,width=1600,height=900]

for the secondary screen.

EDIT

GraphicDevice.getDisplayMode().getWidth() delivers the text-scale-invariant value 1600 for the second screen and so the correcting factor for the rectangles reported by GraphicsConfiguration.getBounds()

Upvotes: 0

Erick Robertson
Erick Robertson

Reputation: 33068

This is not a bug. The values are correct.

You are getting the bounds of each screen, and then you are getting the X and Y coordinates of each bound, which is the coordinate of the upper-left corner. GraphicsConfiguration.getBounds() returns a Rectangle defining the screen boundaries. Rectangle.getX() and Rectangle.getY() return the coordinates of the upper-left corner of the rectangle. Rectangle.getWidth() and Rectangle.getHeight() return the size.

You have two monitors. Here are the boundaries of each monitor:

1: X = 0   , Y = 0, Width = 1920, Height = 1080
2: X = 1920, Y = 0, Width = 1280, Height = 1080

Upvotes: 2

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