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Suggestion
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Resolution: Unresolved
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Not Evaluated
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None
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5.13.2
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None
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Windows 10 Pro 64 bit, version no. 1809. Computer Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz, 16.0 GB RAM
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All
With Qt Quick, I created a custom button which looks like that:
This button also contains several states (default, hover, pressed), and the transition between each states is animated. I found a way to animate each properties easily with the Qt Quick engine, except for the image one. Indeed, I want to animate the image transition, by performing a crossfade between states.
However I couldn't found a such animator for images. The only way I found was to add 3 images to my button, one for each states, and to animate their respective opacity.
Below is the code for my buttons:
Button
{
property bool hoveredBtn: false
property bool pressedBtn: false
id: btAnimStateDemo
height: 40
anchors.right: parent.right
anchors.rightMargin: 5
anchors.left: parent.left
anchors.leftMargin: 5
anchors.top: parent.top
anchors.topMargin: 290
state: "DEFAULT"
// the button background
background: Rectangle
{
id: btAnimStateDemoBg
anchors.fill: parent
}
// the button text
Text
{
id: btAnimStateDemoText
text: qsTr("A button showing animated states (default, hovered, pressed)")
renderType: Text.NativeRendering
font.bold: true
horizontalAlignment: Text.AlignHCenter
verticalAlignment: Text.AlignVCenter
anchors.fill: parent
}
Image
{
id: btAnimStateDemoDefaultImage
width: 30
height: 30
anchors.left: parent.left
anchors.leftMargin: 5
anchors.bottom: parent.bottom
anchors.bottomMargin: 5
anchors.top: parent.top
anchors.topMargin: 5
opacity: 1.0
source: "Resources/Palette.svg"
}
Image
{
id: btAnimStateDemoHoverImage
width: 30
height: 30
anchors.left: parent.left
anchors.leftMargin: 5
anchors.bottom: parent.bottom
anchors.bottomMargin: 5
anchors.top: parent.top
anchors.topMargin: 5
opacity: 0.0
source: "Resources/Smile.svg"
}
Image
{
id: btAnimStateDemoPressedImage
width: 30
height: 30
anchors.left: parent.left
anchors.leftMargin: 5
anchors.bottom: parent.bottom
anchors.bottomMargin: 5
anchors.top: parent.top
anchors.topMargin: 5
opacity: 0.0
source: "Resources/Woman.svg"
}
// the component state array
states:
[
State
{
name: "DEFAULT"
PropertyChanges { target: btAnimStateDemoBg; color: "green"}
PropertyChanges { target: btAnimStateDemoBg; radius: 4}
PropertyChanges { target: btAnimStateDemoDefaultImage; opacity: 1.0}
PropertyChanges { target: btAnimStateDemoHoverImage; opacity: 0.0}
PropertyChanges { target: btAnimStateDemoPressedImage; opacity: 0.0}
},
State
{
name: "HOVERED"
PropertyChanges { target: btAnimStateDemoBg; color: "red"}
PropertyChanges { target: btAnimStateDemoBg; radius: 10}
PropertyChanges { target: btAnimStateDemoDefaultImage; opacity: 0.0}
PropertyChanges { target: btAnimStateDemoHoverImage; opacity: 1.0}
PropertyChanges { target: btAnimStateDemoPressedImage; opacity: 0.0}
},
State
{
name: "PRESSED"
PropertyChanges { target: btAnimStateDemoBg; color: "blue"}
PropertyChanges { target: btAnimStateDemoBg; radius: 15}
PropertyChanges { target: btAnimStateDemoDefaultImage; opacity: 0.0}
PropertyChanges { target: btAnimStateDemoHoverImage; opacity: 0.0}
PropertyChanges { target: btAnimStateDemoPressedImage; opacity: 1.0}
}
]
// the matching transitions between states
transitions:
[
Transition
{
from: "*"; to: "DEFAULT"
ColorAnimation { property: "color"; easing.type: Easing.Linear; duration: 1000 }
NumberAnimation { properties: "radius, opacity"; easing.type: Easing.Linear; duration: 1000 }
},
Transition
{
from: "*"; to: "HOVERED"
ColorAnimation { property: "color"; easing.type: Easing.Linear; duration: 1000 }
NumberAnimation { properties: "radius, opacity"; easing.type: Easing.Linear; duration: 1000 }
},
Transition
{
from: "*"; to: "PRESSED"
ColorAnimation { property: "color"; easing.type: Easing.Linear; duration: 1000 }
NumberAnimation { properties: "radius, opacity"; easing.type: Easing.Linear; duration: 1000 }
}
]
// the mouse area which will apply the correct state in relation to the current mouse status
MouseArea
{
anchors.fill: parent
hoverEnabled: true
onEntered: {btAnimStateDemo.state = "HOVERED"; btAnimStateDemo.hoveredBtn = true;}
onExited: {btAnimStateDemo.state = btAnimStateDemo.pressedBtn ? "PRESSED" : "DEFAULT"; btAnimStateDemo.hoveredBtn = false;}
onPressed: {btAnimStateDemo.state = "PRESSED"; btAnimStateDemo.pressedBtn = true;}
onReleased: {btAnimStateDemo.state = btAnimStateDemo.hoveredBtn ? "HOVERED" : "DEFAULT"; btAnimStateDemo.pressedBtn = false;}
}
}
The above code works well, and reaches the purpose I planned, but is a little complicated from my point of view. It would be wonderful if an animator like NumberAnimation or ColorAnimation would exist for the images, but I found none.
It would be possible to add a such animator? (And eventually allow this animator to support several type of transition effects, like crossfade, morphing, ..., or even custom transitions?)
NOTE this issue is also followed here: