How can I get the currentIndex from the gridView and highlight it and update back the currentIndex once it's changed to another item? [IN QML]. Please let me know what is the solution.
Thank you in advance!
GridView{
id: colorGrid
model: colorModelData
delegate: ItemDelegate{
id: colorcomboDelegate
background: Rectangle {
id: colorRect
anchors.centerIn: parent
width: colorGrid.cellWidth * 0.6
height: colorGrid.cellWidth * 0.6
radius: width/2
color: colorModelData[index]
}
Rectangle {
id:colorSelectedRing
anchors.centerIn: parent
width: colorRect.width * 1.30
height: width
radius: width/2
z:-1
visible: index=== colorGrid.currentIndex? true:false [...ERROR]
Rectangle {
id:colorSelectedBlackRing
anchors.centerIn: parent
width: colorRect.width * 1.13
height: width
radius: width/2
}
}
}
currentIndex: [Need to update the current index]
}
Related
I would like to create a progress bar in which the progress is also displayed as text.
Through a blog post, the progress bar was quickly created.
Unfortunately, the progress bar overwrites the text. Is there a way to overlay this?
Item {
id: item
property double maximum: 10
property double value: 50 //mill.value
property double minimum: 0
property bool visibleValue: true
height: parent.height
width: parent.width
Rectangle { id: frame; width: parent.width; height: parent.height; color: "lightgrey"; border.width: 1; radius: 0.5 * height
Label {
anchors.centerIn: parent;
text: item.value + " %";
color: "black";
font.bold: true;
visible: item.visibleValue
}
Rectangle {
visible: item.value > item.minimum
x: 0.1 * frame.height; y: 0.1 * frame.height
height: 0.8 * frame.height
width: Math.max(height, Math.min((item.value - item.minimum) / (item.maximum - item.minimum) * (parent.width - 0.2 * frame.height), parent.width - 0.2 * frame.height)) // clip
color: 'darkgrey'
radius: parent.radius
}
}
}
You need to swap the order of the inner Label and Rectangle.
There are other issues, such as the display of the label being incorrect for your example. You will get "2%" shown, when, in fact, for a range of 0-10 and a value of 2, the calculated percentage should be "20%". I thought I just draw that to your attention, but, I haven't applied the fix, since, I am not sure what you're gunning for.
Item {
id: item
property double maximum: 10
property double value: 2 //mill.value
property double minimum: 0
property bool visibleValue: true
height: parent.height
width: parent.width
Rectangle { id: frame; width: parent.width; height: parent.height; color: "lightgrey"; border.width: 1; radius: 0.5 * height
Rectangle {
visible: item.value > item.minimum
x: 0.1 * frame.height; y: 0.1 * frame.height
height: 0.8 * frame.height
width: Math.max(height, Math.min((item.value - item.minimum) / (item.maximum - item.minimum) * (parent.width - 0.2 * frame.height), parent.width - 0.2 * frame.height)) // clip
color: 'darkgrey'
radius: parent.radius
}
Label {
anchors.centerIn: parent;
text: item.value + " %";
color: "black";
font.bold: true;
visible: item.visibleValue
}
}
}
I created a slider in an item and customized it like in the following code :
Item {
id: item1
x: 0
y: 0
width: 200
height: parent.height
Rectangle {
id: background
anchors.fill: parent;
color:Qt.rgba(0.9,0.9,0.9,1);
}
Slider {
anchors.centerIn: parent
orientation: Qt.Vertical
height: parent.height
style: SliderStyle {
groove: Rectangle {
implicitWidth: 200
implicitHeight: 8
color: "gray"
radius: 8
}
handle: Rectangle {
anchors.centerIn: parent
color: control.pressed ? "white" : "lightgray"
border.color: "gray"
border.width: 2
width: 20
height: 20
radius: 6
}
}
}
}
The problem appears when I change the size of the handle to have it wider than high, so I change in the handle :
width: 20
height: 80 //the height is changed instead of width but I think
//it's because it is a vertical slider
And then, when I move the handle, it doesn't stay under the mouse cursor but there is an offset between the two.
How to fix that?
The slider is internally rotated 90 degrees when the orientation is vertical, so you'll need to set the width instead of the height. In other words, always style the handle assuming that the slider is horizontal, and the rest will just work...
... except for the mouse offset bug that you just ran into. It appears that your use case isn't auto-tested. Please submit a bug report at bugreports.qt.io.
I am trying to give a Tumbler my own style. I declare the Tumbler like this:
Tumbler {
style: MyTumblerStyle {}
height: UIConstants.smallFontSize * 10
width: UIConstants.smallFontSize * 3
TumblerColumn {
model: [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24]
}
}
where MyTymblerStyle is defined like this:
TumblerStyle {
id: root
visibleItemCount: 5
background: Rectangle {}
foreground: Item {}
frame: Item {}
highlight: Item {}
delegate: Item {
id: delRoot
implicitHeight: (control.height) / root.visibleItemCount
Item {
anchors.fill: parent
Text {
text: styleData.value
font.pixelSize: UIConstants.smallFontSize
font.family: UIConstants.robotoregular
anchors.centerIn: parent
scale: 1.0 + Math.max(0, 1 - Math.abs(styleData.displacement)) * 0.6
color: styleData.current?UIConstants.color:"black"
opacity: 1 - Math.abs(styleData.displacement/(root.visibleItemCount-3))
}
}
}
}
I use it in a Row like this:
Row {
MyTumbler {}
StandardText {
color: UIConstants.color
text: "Uhr"
}
}
Now, the result looks like this:
As you can see, the "Uhr" text center is aligned to the top of the Tumbler. Also the Row does not seem to recognize the real width of the Tumbler.
Why? It does work when I do not use MyTumblerStyle.
The problem isn't your style, it's the width assignment.
It helps to break out the Rectangles at a time like this:
import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Extras 1.3
ApplicationWindow {
title: qsTr("Hello World")
width: 300
height: 600
visible: true
Column {
anchors.centerIn: parent
Tumbler {
id: tumbler
width: 30
TumblerColumn {
model: 25
}
Component.onCompleted: print(width, height, implicitWidth, implicitHeight)
}
Rectangle {
width: tumbler.implicitWidth
height: tumbler.implicitHeight
color: "transparent"
border.color: "blue"
Text {
text: "Tumbler implicit size"
anchors.fill: parent
wrapMode: Text.Wrap
}
}
Rectangle {
width: tumbler.width
height: tumbler.height
color: "transparent"
border.color: "blue"
Text {
text: "The size you gave"
anchors.fill: parent
wrapMode: Text.Wrap
}
}
}
}
(I don't have access to UIConstants, so I guess the width you set)
The implicitWidth of Tumbler is calculated based on the width of each individual TumblerColumn. This allows you to set individual widths for columns, something that is necessary for scenarios where some are wider than others, for example:
So, you should also set the width of your column, or, preferably, only set the width of your column, and not the entire Tumbler:
import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Extras 1.3
ApplicationWindow {
width: 300
height: 600
visible: true
Row {
anchors.centerIn: parent
Tumbler {
id: tumbler
TumblerColumn {
model: 25
width: 30
}
}
Text {
text: "Uhr"
}
}
}
This also explains why the Text is weirdly positioned; the Row sees 30 pixels, but the column still has its original (much wider) width.
I am aligning Items using Column and Row types in QML. Is there any way to give different spacing to each Item. Something along the line of the following:
like:
item1
spacing:10
item2
spacing:20
item3
spacing:40
item4
here is my code:
ApplicationWindow {
visible: true
width: 640
height: 480
title: qsTr("Hello World")
Rectangle{
id: rect
anchors.fill: parent
Column{
id: column
anchors.centerIn: parent
spacing: 10
Row{
id: row1
anchors.horizontalCenter: parent.horizontalCenter
Rectangle{
width: 300
height: 100
color: "lightgreen"
}
}
Row{
id: row2
anchors.horizontalCenter: parent.horizontalCenter
Rectangle{
width: 100
height: 50
color: "lightblue"
}
}
Row{
id: row3
anchors.horizontalCenter: parent.horizontalCenter
Rectangle{
width: 50
height: 50
color: "green"
}
}
}
}
}
The hacky version with spacer Items
Sometimes I prefer this over ColumnLayout since in some situations I just can't use ColumnLayout (can't explain exactly why though at the moment).
I get it working as follows
Column {
Rectangle {
// ...
}
Item {
width: 1 // dummy value != 0
height: 10
}
Rectangle {
// ...
}
Item {
width: 1 // dummy value != 0
height: 20
}
Rectangle {
// ...
}
}
An Item of width 0 won't work. I suggest putting a Spacer_Col.qml (and Spacer_Row analog) into you Toolbox, looking something like
import QtQuick 2.8
Item {
id: root
property alias spacing: root.height
width: 1 // dummy value different from 0
}
Using ColumnLayout
ColumnLayout {
Rectangle{
// ...
}
Rectangle{
Layout.topMargin: 10
// ...
}
Rectangle{
Layout.topMargin: 20
// ...
}
}
By nesting each rectangle you want to space, as follows;
Row {
spacing: 20
Rectangle { color: "red"; width: 50; height: 50 }
Row {
spacing: 50
Rectangle { color: "green"; width: 20; height: 50 }
Row {
spacing: 100
Rectangle { color: "blue"; width: 50; height: 20 }
}
}
}
Different spacings in a row
I know I should be using Row, Column etc. rather than items anchored by ID to make my code simpler and easier to read. But they refuse to work most of the time. For example, in this case:
import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Layouts 1.1
ListView {
id: listView
anchors.fill: parent
topMargin: spacing
anchors.leftMargin: spacing
anchors.rightMargin: spacing
clip: true
spacing: 0.5 * pxPermm
model: SqlQueryModel {}
delegate: Rectangle {
id: delegateItem
color: "white"
height: 14 * pxPermm
width: listView.width
clip: true
Row {
id: row
anchors.fill: delegateItem
spacing: pxPermm
Image {
height: row.height
width: height
source: "qrc:/resources/ryba.jpg"
fillMode: Image.PreserveAspectCrop
}
Item {
id: textItem
height: row.height
Label {
anchors.left: textItem.left
anchors.top: textItem.top
text: nazov
font.bold: true
}
Label {
anchors.left: textItem.left
anchors.bottom: textItem.bottom
text: cas
}
}
}
}
}
This shows two Labels on the top of an Image in the delegate of list view. Not two labels to the right of the image, as you would expect. However, this code works:
import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Layouts 1.1
ListView {
id: listView
anchors.fill: parent
topMargin: spacing
anchors.leftMargin: spacing
anchors.rightMargin: spacing
clip: true
spacing: 0.5 * pxPermm
model: SqlQueryModel {}
delegate: Rectangle {
id: delegateItem
color: "white"
height: 14 * pxPermm
width: listView.width
clip: true
Row {
id: row
anchors.fill: delegateItem
spacing: pxPermm
Image {
height: row.height
width: height
source: "qrc:/resources/ryba.jpg"
fillMode: Image.PreserveAspectCrop
}
Label {
text: nazov
font.bold: true
}
}
}
}
Of course I need to show more than one label in the delegate. What am I missing here?
It turns out that Item has zero width by default. The code works properly after the width is set:
Item {
id: textItem
height: row.height
width: childrenRect.width
// labels etc
}