I want to have a rectangle that has a background animation.
take a look at this
codepen.io/shshaw/pen/DxJka
How can I set this as my rectangle background so that it shows this animation in my application?
I want to be able to "load" premade css animations like the one in the link.
If you think to use css, you can use a WebView and in this WebView you can load a html file from resource that read css file from resources too
Within QML there is the possibility to use particle emitters, see Qt Docs for some information. The following should get you going a bit.
import QtQuick 2.11
import QtQuick.Controls 2.4
import QtQuick.Controls.Material 2.4
import QtQuick.Particles 2.0
Item {
Rectangle {
color: "#F9A72B"
anchors.fill: parent
}
ParticleSystem { id: particles }
ImageParticle {
system: particles
source: "qrc:/cloud.svg"
alpha: 0.4
alphaVariation: 0.2
}
Emitter {
system: particles
emitRate: 1
lifeSpan: 70000
velocity: PointDirection { x: -10; xVariation: -5; }
size: 20
sizeVariation: 10
anchors.top: parent.top
anchors.right: parent.right
anchors.bottom: parent.bottom
anchors.margins: 5
}
}
Obviously, you will have to play with the parameters to get it to your liking.
Related
Can anyone tell me why the following fails?
The Rectangles specify border.width: top.bw where bw is a property in the top Window which has id:top. But the result is zero.
If I replace top.bw with just bw it works in this demo but not in the real application which might have a bw defined in an intermediate object. So I need to specify top.bw somehow.
What's wong with this?
import QtQuick 2.14
import QtQuick.Window 2.14
Window {
id: top
width:800; height: 800
property double bw: 15
ListView {
anchors.fill:parent
model: 3
delegate: Rectangle {
width: 100; height: 100
border.width: top.bw
}
}
}
To understand the problem you must add the following:
Component.onCompleted: console.log(top)
And you will get the following:
qml: QVariant(QQuickAnchorLine, )
So it appears that "top" is an undocumented property in Item(This property is for the use of anchors, for more information read Positioning with Anchors) causing a variable name conflict. The solution is to use another id like "root".
import QtQuick 2.14
import QtQuick.Window 2.14
Window {
id: root
width:800; height: 800
property double bw: 15
ListView {
anchors.fill:parent
model: 3
delegate: Rectangle {
width: 100; height: 100
border.width: root.bw
}
}
}
I'm fairly new to QML/Qt. Basically I would like to know how to apply a blur to the inside of the white rectangle seen on the photo below and only the inside so that it blurs the part of the background image within the rectangle. I tried doing this in a normal Qt project but don't think its possible without using QML.
It's possible. Use ShaderEffectSource item:
import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Controls 2.12
import QtGraphicalEffects 1.12
import "qrc:/"
ApplicationWindow {
visible: true
width: 640
height: 480
title: qsTr("Hello World")
Image {
id: bug
anchors.fill: parent
width: 32
height: 32
source: "qrc:/Original_bug.png"
ShaderEffectSource{
id: shader
sourceItem: bug
width: 128
height: 128
anchors{
right: parent.right
rightMargin: 32
verticalCenter: parent.verticalCenter
}
sourceRect: Qt.rect(x,y, width, height)
}
GaussianBlur {
anchors.fill: shader
source: shader
radius: 8
samples: 4
}
}
}
Using sourceRect property you can specify an area to be blurred.
There are some issues when resizing the source image. This example works good only for static one.
I wanted to have the Material style ProgressBar component, but with some modifications to make it's height adjustable.
So far so good, I had the result I wanted.
So I just copied this code inside MyPb.qml to use it as a component:
import QtQuick 2.11
import QtQuick.Templates 2.4 as T
import QtQuick.Controls.Material 2.4
import QtQuick.Controls.Material.impl 2.4
T.ProgressBar {
id: control
property real radius: 3
contentItem: ProgressBarImpl {
implicitHeight: control.height
scale: control.mirrored ? -1 : 1
color: control.Material.accentColor
progress: control.position
indeterminate: control.visible && control.indeterminate
}
background: Rectangle {
implicitWidth: control.width
implicitHeight: control.height
radius: control.radius
color: Qt.rgba(control.Material.accentColor.r, control.Material.accentColor.g, control.Material.accentColor.b, 0.25)
}
}
Which gives this result for the sake of example:
With the code:
Rectangle {
width: 600
height: 300
color: "black"
MyPb {
anchors.centerIn: parent
id: prg
width: 100
height: 20
indeterminate: false
radius: 5
visible: true
value: 0.5
}
}
Because ProgressBarImpl doesn't really support radius, the rounded corners are "buried" under the opaque progress rectangle as can be seen on the picture (left of progress bar).
Now, the reason I'm not making my own progress bar is that I want the "indeterminate" animation as well. So I thought it would be much
simpler to reuse the Qt implementation than starting making my own
animations.
So I wonder if there would be a way to have the Material progress bar, but apply to it some kind of treatment to get rounded corners both with indeterminate = false/true.
Any help would be appreciated!
See the following post in the Qt forum:
https://forum.qt.io/topic/91649/make-a-round-progress-bar/7
The progress bar proposed there consists of the following components:
a rounded Rectangle for the "trough" of the progress bar
an Item that acts as a rectangular clip path
a rounded Rectangle inside that Item, used as the coloured bar
Adapted to your question, I get the following code as a proof-of-concept:
import QtQuick 2.9
Rectangle {
property int percentage: 40
id: root
width: 400
height: 100
radius: height / 2
color: "#333"
Item {
id: cliprect
anchors.bottom: parent.bottom
anchors.top: parent.top
anchors.left: parent.left
width: parent.width * parent.percentage / 100
clip: true
Rectangle {
width: root.width
height: root.height
radius: height / 2
anchors.bottom: parent.bottom
anchors.left: parent.left
color: "#e33"
}
}
}
It should be easy to move that into a template / make it compatible with the Material properties.
You could try setting an OpacityMask on the contentItem using the background item as a mask source.
If that doesn't work out, it will be easier just to create a progress bar. It is a very trivial and non-interactive component with a tiny usage interface after all.
I have ListView with my own delegate.
import QtQuick 2.7
import QtQuick.Controls 2.0
import QtQuick.Layouts 1.0
ItemDelegate
{
height: 40
Row
{
spacing: 10
anchors.verticalCenter: parent.verticalCenter
CheckBox
{
}
}
}
The problem is that check boxes does not resize despite ItemDelegate's height.
I get this for height = 40:
I get this for height = 10:
I've tried playing with CheckBox'es width and height values - did not help.
Is it possible to make it smaller at all, without customizing it?
You can, in theory, increase the size of the indicator, but it won't increase the size of the checkmark image:
CheckBox {
text: "CheckBox"
anchors.centerIn: parent
checked: true
indicator.width: 64
indicator.height: 64
}
There are a couple of reasons why the image is not scaled. First of all, the checkmark would be blurry if it was upscaled. And more importantly, to retain best possible performance. Instead of calculating all the sizes relative to each other and that way creating huge amounts of bindings like Qt Quick Controls 1 did, Qt Quick Controls 2 bases its scalability instead on the automatic high-DPI scaling system introduced in Qt 5.6. You get simply a different #Nx image when running with scale factor N.
I'm afraid you need to customize your checkbox to get a different size.
Example:
import QtQuick 2.7
import QtQuick.Controls 2.0
import QtQml 2.2
ApplicationWindow {
visible: true
width: 640
height: 480
title: qsTr("Hello World")
Component {
id: contactDelegate
ItemDelegate
{
id: item
width: 40
height: 40
CheckBox
{
id: control
text: name
indicator: Rectangle {
implicitWidth: item.width
implicitHeight: item.height
x: control.leftPadding
y: parent.height / 2 - height / 2
border.color: control.down ? "#dark" : "#grey"
Rectangle {
width: 25
height: 25
x: 7
y: 7
color: control.down ? "#dark" : "#grey"
visible: control.checked
}
}
}
}
}
ListView {
width: 180;
height: 200;
spacing: 10
model: ContactModel {}
delegate: contactDelegate
}
}
By the way, the spacing property should be set in your ListView, not the delegate. Otherwise, it has no effect.
I am trying to write a little program, which has to connect to the Internet. While doing this, the app should show an animation which I have made in Flash Professional and exported as a sprite sheet.
I use the AnimatedSprite Type in QML:
import QtQuick 2.2
import QtQuick.Controls 1.1
ApplicationWindow {
visible: true
width: 640
height: 480
flags: Qt.FramelessWindowHint
| Qt.Window
color:"#00000000"
title:"Presenter Remote"
Rectangle{
color:"steelblue"
height:parent.height
width:parent.width
radius: 10
}
Image {
anchors.right: parent.right
anchors.top: parent.top
anchors.topMargin: -20
scale: 0.5
source: "close.png"
MouseArea {
width:parent.width
height:parent.height
onClicked: Qt.quit()
}
}
AnimatedSprite{
source: "Animation_Cloud.png"
anchors.centerIn: parent
frameHeight:313
frameWidth:232
running: true
frameCount:60
frameDuration: 20
width:232
height:313
}
}
When I compile and launch I get the sprite animating, but it moves from right to left while doing it.
How can I set the sprite still and just keep the "half arrows" moving?
The problem seems to be with your sprite sheet; remove the excess space from the right hand side of the .png.