how to create a scrollbar for rectangle in QML - qt

like the web pages,when content's high beyond the rectangle,there is a scrollbar.
Is there anyone else who can help me?
I have tried with listview,but I can't use it in a rectangle

There is an example in the docs, how to use ScrollBar without a Flickable:
import QtQuick 2.7
import QtQuick.Controls 2.0
Rectangle {
id: frame
clip: true
width: 160
height: 160
border.color: "black"
anchors.centerIn: parent
Text {
id: content
text: "ABC"
font.pixelSize: 160
x: -hbar.position * width
y: -vbar.position * height
}
ScrollBar {
id: vbar
hoverEnabled: true
active: hovered || pressed
orientation: Qt.Vertical
size: frame.height / content.height
anchors.top: parent.top
anchors.right: parent.right
anchors.bottom: parent.bottom
}
ScrollBar {
id: hbar
hoverEnabled: true
active: hovered || pressed
orientation: Qt.Horizontal
size: frame.width / content.width
anchors.left: parent.left
anchors.right: parent.right
anchors.bottom: parent.bottom
}
}

adding rectangle into flickable solved my problem
import QtQuick.Controls 2.5
import QtQuick.Controls.Material 2.5
import QtQuick 2.8
Item {
id: item1
visible: true
width: 800
height: 600
ScrollView {
id: frame
clip: true
anchors.fill: parent
//other properties
ScrollBar.vertical.policy: ScrollBar.AlwaysOn
Flickable {
contentHeight: 2000
width: parent.width
Rectangle {
id : rectangle
color: "#a7c4c6"
radius: 6
//visible: !busyIndicator.running
anchors.fill: parent
}
}
}
}

Related

QML: SplitView hides all children except last

I am new to QML and I am trying to implement a horizontal splitview with 2 children. The problem that I am having is that despite setting maximum and minimum widths for the children, the last child always takes up the entire split view and all the others are hidden and have to be manually opened. I have tried defining minimum and maximum widths using Layout.maximum/minimumwidth (which dont work at all) and have tried using fillwidth on the first child of the splitview. Nothing seems to work. I even copied and pasted the code from the qml doc page from splitview and it did the same thing. Here is my code:
import QtQuick 2.0
import QtQuick.Controls 2.15
import QtQuick.Layouts 1.11
import "../buttons"
import "../customWidgets"
Rectangle {
id: conversationsPage
anchors.fill: parent
height: 455
width: 800
SplitView {
id: splitView
anchors.fill: parent
orientation: Qt.Horizontal
Rectangle {
id: sideBar
Layout.minimumWidth: 200
Layout.preferredWidth: 300
Layout.maximumWidth: 500
Layout.fillWidth: true
color: "#b9b9b9"
anchors.top: parent.top
anchors.bottom: parent.bottom
anchors.bottomMargin: 0
anchors.topMargin: 0
clip: true
Rectangle {
id: sideBarTopBar
y: 0
z: 2
height: 44
color: "#e868ff"
anchors.left: parent.left
anchors.right: parent.right
anchors.leftMargin: 0
anchors.rightMargin: 0
SearchBar {
id: conversationSearchBar
anchors.left: parent.left
anchors.right: newConversationBtn.left
anchors.top: parent.top
anchors.bottom: parent.bottom
anchors.bottomMargin: 10
anchors.topMargin: 10
anchors.leftMargin: 10
anchors.rightMargin: 10
}
IconBtn {
id: newConversationBtn
width: 35
height: 35
anchors.verticalCenter: parent.verticalCenter
anchors.right: parent.right
anchors.rightMargin: 10
btnIconSource: "../images/icons/plus.svg"
}
}
ScrollView {
id: conversationsListScroll
anchors.left: parent.left
anchors.right: parent.right
anchors.top: sideBarTopBar.bottom
anchors.bottom: parent.bottom
z: 1
anchors.topMargin: 0
ColumnLayout {
id: conversationListLayout
x: 0
y: 0
width: conversationsListScroll.width
clip: true
ConversationTab {
Layout.fillWidth: true
}
ConversationTab {
Layout.fillWidth: true
}
ConversationTab {
Layout.fillWidth: true
}
ConversationTab {
Layout.fillWidth: true
}
ConversationTab {
Layout.fillWidth: true
}
ConversationTab {
Layout.fillWidth: true
}
ConversationTab {
Layout.fillWidth: true
}
}
}
}
Rectangle {
id: conversationView
Layout.fillWidth: false
Layout.minimumWidth: 300
Layout.maximumWidth: 500
color: "#ff0000"
anchors.top: parent.top
anchors.bottom: parent.bottom
anchors.topMargin: 0
anchors.bottomMargin: 0
}
}
Do you guys have any idea why the split view isnt working the way I want it to?
I noticed a couple of things, first, in SplitView from Quick Controls 2, you must use the SplitView attached property instead of the Layout attached property.
Secondarily, I also noticed that you have anchors specified inside the direct children of the SplitView, which have no effect and can be removed. I am not sure, but it seems like the child with SplitView.fillWidth: true should not have a maximum width set, as both children having maximum widths can prevent the SplitView from filling its parent Rectangle fully (you may still have a use case for this, but I removed it for this reason).
Here is the code with these recommendations:
SplitView {
id: splitView
anchors.fill: parent
orientation: Qt.Horizontal
Rectangle {
id: sideBar
SplitView.minimumWidth: 200
SplitView.preferredWidth: 300
SplitView.fillWidth: true
color: "#b9b9b9"
clip: true
// children here...
}
Rectangle {
id: conversationView
SplitView.fillWidth: false
SplitView.minimumWidth: 300
SplitView.maximumWidth: 500
color: "#ff0000"
}
}

Scroll Bar is not working in ScrollView qml

I'm trying to use a scrollbar inside a scrollview. The scrollbar shows up and I can interact with it (hover/pressed), but it doesn't move, and I can't understand why. I wrote my code by following the official documentation and online examples.
Here's the code:
import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.15
import QtGraphicalEffects 1.15
Window {
width: 740
height: 580
visible: true
color: "#00000000"
title: qsTr("Hello World")
Rectangle {
id: rectangle
color: "#40405f"
anchors.fill: parent
Button {
id: button
text: qsTr("Menu")
anchors.left: parent.left
anchors.top: parent.top
anchors.bottom: parent.bottom
anchors.leftMargin: 10
anchors.bottomMargin: 466
anchors.topMargin: 74
onClicked: animationMenu.running = true
}
ScrollView {
id: scrollView
width: 0
anchors.left: button.right
anchors.top: parent.top
anchors.bottom: parent.bottom
anchors.leftMargin: 10
anchors.bottomMargin: 10
anchors.topMargin: 10
clip: true
Rectangle {
id: rectangle1
color: "#00000000"
border.color: "#00000000"
border.width: 0
anchors.fill: parent
PropertyAnimation {
id: animationMenu
target: scrollView
property: "width"
to: if(scrollView.width == 0) return 240; else return 0
duration: 800
easing.type: Easing.InOutQuint
}
Column {
id: columnMenu
width: 0
anchors.fill: parent
spacing: 10
Button {
id: button1
text: qsTr("Button")
}
Button {
id: button2
text: qsTr("Button")
}
Button {
id: button3
text: qsTr("Button")
}
Button {
id: button4
text: qsTr("Button")
}
}
}
ScrollBar {
id: vbar
hoverEnabled: true
orientation: Qt.Vertical
size: scrollView.height / rectangle1.height
anchors.top: parent.top
anchors.right: parent.right
anchors.bottom: parent.bottom
wheelEnabled: true
pressed: true
active: true
}
}
}
}
Ok, so I edited the code to a smaller version so that it can be run.
Some advices:
Use anchors or Layouts. Do not use fixed values or some kind of treats, no matter if it works. The long term value of your code will be bad.
You should read carefully the (ScrollView documentatio). Also the Size section and the Touch and Mouse Interaction Section.
I am able to modify your example without the animation.
import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.15
import QtQuick.Layouts 1.12
import QtGraphicalEffects 1.15
Window {
width: 740
height: 580
visible: true
color: "#00000000"
title: qsTr("Hello World")
Rectangle {
id: rectangle
color: "#40405f"
anchors.fill: parent
RowLayout{
anchors.fill: parent
Button {
id: button
text: qsTr("Menu")
width: 100
height: 50
}
ScrollView {
id: scrollView
Layout.fillWidth: true
Layout.fillHeight: true
RowLayout{
implicitHeight: 2000
implicitWidth: 2000
Column {
id: columnMenu
width: 0
anchors.fill: parent
spacing: 10
Repeater{
model: 50
delegate: Button {
text: qsTr("Button")
}
}
}
}
}
}
}
}

How to use the mouse wheel to slide the QML page based on ScrollBar?

I tried to create a child window to show an article that can't be fully displayed by the window. For now, I can slide the page through dragging the ScrollBar (QML Type), but I want to slide it by using the mouse wheel as well.
Here is the code:
import QtQuick 2.2
import QtQuick.Window 2.12
import QtQuick.Controls 2.12
Window {
id:privacyWindow
width: 640
height: 480
title:qsTr("Privacy")
Rectangle {
id: privacy
clip: true
width: privacyWindow.width
height: privacyWindow.height
anchors.centerIn: parent
Rectangle {
id: textArea
clip: true
width: privacyWindow.width - 150
height: privacyWindow.height
anchors.centerIn: parent
Text {
id: content
width: textArea.width
text: ""
wrapMode: Text.WordWrap
textFormat: Text.RichText
//x: -horizontalBar.position * width
y: -verticalBar.position * height
}
}
ScrollBar {
id: verticalBar
hoverEnabled: true
active: hovered || pressed
orientation: Qt.Vertical
size: privacy.height / content.height
anchors.top: parent.top
anchors.right: parent.right
anchors.bottom: parent.bottom
}
}
}
Any help would be greatly appreciated! Thank you. :)
I have managed to solve it by replacing Rectangle with Flickable.
import QtQuick.Controls 2.12
Window {
id: privacyWindow
width: 640
height: 480
title:qsTr("Privacy")
Flickable {
id: flickable
clip: true
width: privacyWindow.width - 150
height: privacyWindow.height
contentWidth: content.width
contentHeight:content.height
anchors.centerIn: parent
Text {
id: content
width: flickable.width
text: ""
wrapMode: Text.WordWrap
textFormat: Text.RichText
}
ScrollBar.vertical: ScrollBar {
parent: flickable.parent
anchors.top: parent.top
anchors.right: parent.right
anchors.bottom: parent.bottom
}
}
}

QML ListView::contentWidth is wider than actual content

Trying to implement ListView's content scroll by clicking on a button. When scrolling towards the end of the view ListView's content does not stop at the end of the last picture it overscrolls. Below I provided the minimum working example as well as the preview what goes wrong. Just change the .img path to make it work on your PC. I was looking for some help in sources of ListView and its inherited parent Flickable but nothing that could help to resolve the problem. How to make it stop at the end of the last picture?
import QtQuick 2.14
import QtQuick.Window 2.14
Window {
visible: true
width: 1024
height: 300
Item {
id: root
anchors.fill: parent
property var imagesUrlModel: ["file:///C:/Users/mikha/OneDrive/Изображения/toyota.jpg",
"file:///C:/Users/mikha/OneDrive/Изображения/toyota.jpg"
]
property int _width: 0
Component {
id: imageDelegate
Image {
id: image
sourceSize.height: 300
source: modelData
fillMode: Image.Stretch
}
}
Rectangle {
id: leftButton
anchors.top: root.top
anchors.bottom: parent.bottom
anchors.topMargin: 15
anchors.leftMargin: 10
anchors.left: parent.left
color: "green"
width: 25
MouseArea {
anchors.fill: parent
onClicked: {
listView.contentX = listView.contentX > 0
? listView.contentX - 50 > 0 ? listView.contentX - 50 : 0
: 0
}
}
}
Rectangle {
id: rightButton
anchors.top: root.top
anchors.bottom: parent.bottom
anchors.topMargin: 15
anchors.rightMargin: 10
anchors.right: parent.right
color: "green"
width: 25
MouseArea {
anchors.fill: parent
onClicked: {
listView.contentX = listView.contentX < listView.contentWidth
? listView.contentX + 50
: listView.contentWidth
//wrong content width
}
}
}
ListView{
id: listView
clip: true
boundsBehavior: Flickable.StopAtBounds
anchors.topMargin: 15
anchors.left: leftButton.right
anchors.right: rightButton.left
anchors.top: root.top
anchors.bottom: parent.bottom
spacing: 5
orientation: ListView.Horizontal
model: root.imagesUrlModel
delegate: imageDelegate
}
}
}
In your example just change listView.contentWidth to listView.contentWidth-listView.width in onClicked event for rightButton. But that's not enough. You should check whether the listView.contentX+50 is not overflowing listView.contentWidth-listView.width before you update the listView.contentX. In such case you need to update listView.contentX with difference between listView.contentWidth and listView.width.
Here it is:
listView.contentX = listView.contentX+50 <= listView.contentWidth-listView.width
? listView.contentX + 50
: listView.contentWidth - listView.width
I used another approach with repeater and scrollview and it has worked!
import QtQuick 2.14
import QtQuick.Window 2.14
import QtQuick 2.7
import QtQuick.Controls 1.4
import QtQuick.Controls.Styles 1.4
Window {
visible: true
width: 1024
height: 300
Item {
id: contentItem
anchors.fill: parent
Rectangle {
id: rightButton
anchors.top: contentItem.top
anchors.bottom: contentItem.bottom
anchors.rightMargin: 10
anchors.right: contentItem.right
color: "green"
width: 25
MouseArea {
anchors.fill: parent
onClicked: {
var allowedWidth = scrollView.flickableItem.contentWidth - scrollView.viewport.width
if(row.width < scrollView.viewport.width){
return
}
var offset = scrollView.flickableItem.contentX + 50
if(offset <= allowedWidth){
scrollView.flickableItem.contentX += 50
}
else {
scrollView.flickableItem.contentX = allowedWidth
}
}
}
}
ScrollView {
id: scrollView
anchors.left: contentItem.left
anchors.right: rightButton.left
anchors.top: contentItem.top
anchors.bottom: contentItem.bottom
clip: true
verticalScrollBarPolicy: Qt.ScrollBarAlwaysOff
horizontalScrollBarPolicy: Qt.ScrollBarAlwaysOff
property var imagesUrlModel: [
"file:///C:/Users/mikha/OneDrive/Изображения/toyota.jpg",
"file:///C:/Users/mikha/OneDrive/Изображения/toyota.jpg"
]
Row {
id: row
spacing: 15
Repeater {
id: repeater
anchors.left: parent.left
anchors.right: parent.right
model: scrollView.imagesUrlModel
delegate: Component {
id: imageDelegate
Image {
id: image
sourceSize.height: 300
source: modelData
fillMode: Image.Stretch
}
}
}
}
}
}
}

Adding margins to QML Layout

I'm trying to add padding/margins to my layout so my controls to appear so close to the border of the window. When i set the anchor margins it doesn't appear to actually affect anything.
This is the qml file displayed for the Settings Tab.
import QtQuick 2.7
import QtQuick.Controls 2.0
import QtQuick.Layouts 1.3
import QtQuick.Controls.Material 2.2
Page {
id: control
title: qsTr("Settings")
objectName: "SettingsView"
ColumnLayout {
spacing: 20
anchors.left: parent.left
anchors.right: parent.right
anchors.top: parent.top
Switch {
text: qsTr("Theme")
checked: root.Material.theme === Material.Dark
Layout.fillWidth: true
LayoutMirroring.enabled: true
onClicked: {
root.Material.theme = checked ? Material.Dark : Material.Ligth
//Settings.currentTheme = root.Material.theme
}
}
}
}
This is the main.qml
import QtQuick 2.7
import QtQuick.Controls 2.0
import QtQuick.Layouts 1.3
import QtQuick.Controls.Material 2.2
ApplicationWindow {
id: root
visible: true
width: 300
height: 500
// Theme
Material.theme: Material.Dark
Material.accent: "#4096DD"
Material.primary: "#4096DD"
// Controls
header: TabBar {
id: tabBar
currentIndex: swipeView.currentIndex
TabButton {
//text: qsTr("Home")
icon.source: "qrc:/Images/home.svg"
}
TabButton {
//text: qsTr("Settings")
icon.source: "qrc:/Images/settings.svg"
}
}
SwipeView {
id: swipeView
anchors.fill: parent
currentIndex: tabBar.currentIndex
Page1 {
}
SettingsView {
}
}
}
If an Item is affected by a Layout then you must use Layout.margins if you want to set all the margins to the same value, but if you want to set a different margin in each direction you must use Layout.leftMargin, Layout.topMargin, Layout.rightMargin and Layout .bottomMargin, in your case:
ColumnLayout {
spacing: 20
anchors.left: parent.left
anchors.right: parent.right
anchors.top: parent.top
Switch {
Layout.leftMargin: 20
Layout.topMargin: 20
Layout.rightMargin: 20
// ...
Update:
Then set the margin at the anchor:
ColumnLayout {
spacing: 20
anchors.left: parent.left
anchors.right: parent.right
anchors.top: parent.top
anchors.leftMargin: 20
anchors.topMargin: 20
anchors.rightMargin: 20
Switch {
text: qsTr("Theme")
// ...

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