How to threading data in app?

[tanthinh1510]

The object knows its own color, ask the object for its "color" property instead of asking the screen for a pixel color.

I only used object get position to get pixel in screen. The object have "color" property is "transparent.
As this video below

[wysota]

How is the gradient implemented?

[tanthinh1510]

How is the gradient implemented?

gradient: Gradient {
        id: id0
        GradientStop {
            position: 0.0
            id: id1
            SequentialAnimation on color {
                id: update1
                loops: Animation.Infinite
                ColorAnimation { from: "red"; to: "magenta"; duration: 1000}
                ColorAnimation { from: "magenta"; to: "blue"; duration: 1000}
                ColorAnimation { from: "blue"; to: "cyan"; duration: 1000}
                ColorAnimation { from: "cyan"; to: "lime"; duration: 1000}
                ColorAnimation { from: "lime"; to: "yellow"; duration: 1000}
                ColorAnimation { from: "yellow"; to: "red"; duration: 1000}
            }
        }
        GradientStop {
            position: 1
            id: id2
            SequentialAnimation on color {
                id: update2
                loops: Animation.Infinite
                ColorAnimation { from: "yellow"; to: "red"; duration: 1000}
                ColorAnimation { from: "red"; to: "magenta"; duration: 1000}
                ColorAnimation { from: "magenta"; to: "blue"; duration: 1000}
                ColorAnimation { from: "blue"; to: "cyan"; duration: 1000}
                ColorAnimation { from: "cyan"; to: "lime"; duration: 1000}
                ColorAnimation { from: "lime"; to: "yellow"; duration: 1000}
            }
 
        }

gradient: Gradient {
        id: id0
        GradientStop {
            position: 0.0
            id: id1
            SequentialAnimation on color {
                id: update1
                loops: Animation.Infinite
                ColorAnimation { from: "red"; to: "magenta"; duration: 1000}
                ColorAnimation { from: "magenta"; to: "blue"; duration: 1000}
                ColorAnimation { from: "blue"; to: "cyan"; duration: 1000}
                ColorAnimation { from: "cyan"; to: "lime"; duration: 1000}
                ColorAnimation { from: "lime"; to: "yellow"; duration: 1000}
                ColorAnimation { from: "yellow"; to: "red"; duration: 1000}
            }
        }
        GradientStop {
            position: 1
            id: id2
            SequentialAnimation on color {
                id: update2
                loops: Animation.Infinite
                ColorAnimation { from: "yellow"; to: "red"; duration: 1000}
                ColorAnimation { from: "red"; to: "magenta"; duration: 1000}
                ColorAnimation { from: "magenta"; to: "blue"; duration: 1000}
                ColorAnimation { from: "blue"; to: "cyan"; duration: 1000}
                ColorAnimation { from: "cyan"; to: "lime"; duration: 1000}
                ColorAnimation { from: "lime"; to: "yellow"; duration: 1000}
            }

        }

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This is one example. I have get color pixel of screen another effect.

[wysota]

It seems quite easy to calculate the color from such definition. You know the starting color, the ending color and the percentage of the gradient you are currently in.