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Qt官方示例：Qt Quick Controls - Gallery
2022-07-02 18:16:00 【友善啊，朋友】
這個示例演示常用的Qt Quick控件。
主窗口代碼：
import QtQuick
import QtQuick.Layouts
import QtQuick.Controls
import Qt.labs.settings
import "." as App
ApplicationWindow
{
id: window
width: 360
height: 520
visible: true
title: "Qt Quick 控件"
function help()
{
let displayingControl = listView.currentIndex !== -1
let currentControlName = displayingControl
? listView.model.get(listView.currentIndex).title.toLowerCase() : ""
let url = "https://doc.qt.io/qt-5/" + (displayingControl ? "qml-qtquick-controls2-" + currentControlName + ".html"
: "qtquick-controls2-qmlmodule.html");
Qt.openUrlExternally(url)
}
required property var builtInStyles
Settings
{
id: settings
property string style
}
Shortcut
{
sequences: ["Esc", "Back"]
enabled: stackView.depth > 1
onActivated: navigateBackAction.trigger()
}
Shortcut
{
sequence: StandardKey.HelpContents
onActivated: help()
}
Action
{
id: navigateBackAction
icon.name: stackView.depth > 1 ? "back" : "drawer"
onTriggered:
{
if (stackView.depth > 1)
{
stackView.pop()
listView.currentIndex = -1
} else {
drawer.open()
}
}
}
Shortcut
{
sequence: "Menu"
onActivated: optionsMenuAction.trigger()
}
Action
{
id: optionsMenuAction
icon.name: "menu"
onTriggered: optionsMenu.open()
}
header: ToolBar
{
RowLayout
{
spacing: 20
anchors.fill: parent
ToolButton
{
action: navigateBackAction
}
Label
{
id: titleLabel
text: listView.currentItem ? listView.currentItem.text : "Gallery"
font.pixelSize: 20
elide: Label.ElideRight
horizontalAlignment: Qt.AlignHCenter
verticalAlignment: Qt.AlignVCenter
Layout.fillWidth: true
}
ToolButton
{
action: optionsMenuAction
Menu
{
id: optionsMenu
x: parent.width - width
transformOrigin: Menu.TopRight
Action
{
text: "設置"
onTriggered: settingsDialog.open()
}
Action
{
text: "幫助"
onTriggered: help()
}
Action
{
text: "關於"
onTriggered: aboutDialog.open()
}
}
}
}
}
Drawer
{
id: drawer
width: Math.min(window.width, window.height) / 3 * 2
height: window.height
interactive: stackView.depth === 1
ListView
{
id: listView
focus: true
currentIndex: -1
anchors.fill: parent
delegate: ItemDelegate
{
width: listView.width
text: model.title
highlighted: ListView.isCurrentItem
onClicked:
{
listView.currentIndex = index
stackView.push(model.source)
drawer.close()
}
}
model: ListModel
{
ListElement { title: "BusyIndicator"; source: "qrc:/pages/BusyIndicatorPage.qml" }
ListElement { title: "Button"; source: "qrc:/pages/ButtonPage.qml" }
ListElement { title: "CheckBox"; source: "qrc:/pages/CheckBoxPage.qml" }
ListElement { title: "ComboBox"; source: "qrc:/pages/ComboBoxPage.qml" }
ListElement { title: "DelayButton"; source: "qrc:/pages/DelayButtonPage.qml" }
ListElement { title: "Dial"; source: "qrc:/pages/DialPage.qml" }
ListElement { title: "Dialog"; source: "qrc:/pages/DialogPage.qml" }
ListElement { title: "Delegates"; source: "qrc:/pages/DelegatePage.qml" }
ListElement { title: "Frame"; source: "qrc:/pages/FramePage.qml" }
ListElement { title: "GroupBox"; source: "qrc:/pages/GroupBoxPage.qml" }
ListElement { title: "PageIndicator"; source: "qrc:/pages/PageIndicatorPage.qml" }
ListElement { title: "ProgressBar"; source: "qrc:/pages/ProgressBarPage.qml" }
ListElement { title: "RadioButton"; source: "qrc:/pages/RadioButtonPage.qml" }
ListElement { title: "RangeSlider"; source: "qrc:/pages/RangeSliderPage.qml" }
ListElement { title: "ScrollBar"; source: "qrc:/pages/ScrollBarPage.qml" }
ListElement { title: "ScrollIndicator"; source: "qrc:/pages/ScrollIndicatorPage.qml" }
ListElement { title: "Slider"; source: "qrc:/pages/SliderPage.qml" }
ListElement { title: "SpinBox"; source: "qrc:/pages/SpinBoxPage.qml" }
ListElement { title: "StackView"; source: "qrc:/pages/StackViewPage.qml" }
ListElement { title: "SwipeView"; source: "qrc:/pages/SwipeViewPage.qml" }
ListElement { title: "Switch"; source: "qrc:/pages/SwitchPage.qml" }
ListElement { title: "TabBar"; source: "qrc:/pages/TabBarPage.qml" }
ListElement { title: "TextArea"; source: "qrc:/pages/TextAreaPage.qml" }
ListElement { title: "TextField"; source: "qrc:/pages/TextFieldPage.qml" }
ListElement { title: "ToolTip"; source: "qrc:/pages/ToolTipPage.qml" }
ListElement { title: "Tumbler"; source: "qrc:/pages/TumblerPage.qml" }
}
ScrollIndicator.vertical: ScrollIndicator { }
}
}
StackView
{
id: stackView
anchors.fill: parent
initialItem: Pane
{
id: pane
Image
{
id: logo
width: pane.availableWidth / 2
height: pane.availableHeight / 2
anchors.centerIn: parent
anchors.verticalCenterOffset: -50
fillMode: Image.PreserveAspectFit
source: "images/qt-logo.png"
}
Label
{
text: "Qt Quick Controls 提供了一組控件，可用於在 Qt Quick 中構建完整的界面"
anchors.margins: 20
anchors.top: logo.bottom
anchors.left: parent.left
anchors.right: parent.right
anchors.bottom: arrow.top
horizontalAlignment: Label.AlignHCenter
verticalAlignment: Label.AlignVCenter
wrapMode: Label.Wrap
}
Image
{
id: arrow
source: "images/arrow.png"
anchors.left: parent.left
anchors.bottom: parent.bottom
}
}
}
Dialog
{
id: settingsDialog
x: Math.round((window.width - width) / 2)
y: Math.round(window.height / 6)
width: Math.round(Math.min(window.width, window.height) / 3 * 2)
modal: true
focus: true
title: "Settings"
standardButtons: Dialog.Ok | Dialog.Cancel
onAccepted:
{
settings.style = styleBox.displayText
settingsDialog.close()
}
onRejected:
{
styleBox.currentIndex = styleBox.styleIndex
settingsDialog.close()
}
contentItem: ColumnLayout
{
id: settingsColumn
spacing: 20
RowLayout
{
spacing: 10
Label
{
text: "Style:"
}
ComboBox
{
id: styleBox
property int styleIndex: -1
model: window.builtInStyles
Component.onCompleted:
{
styleIndex = find(settings.style, Qt.MatchFixedString)
if (styleIndex !== -1)
currentIndex = styleIndex
}
Layout.fillWidth: true
}
}
Label
{
text: "Restart required"
color: "#e41e25"
opacity: styleBox.currentIndex !== styleBox.styleIndex ? 1.0 : 0.0
horizontalAlignment: Label.AlignHCenter
verticalAlignment: Label.AlignVCenter
Layout.fillWidth: true
Layout.fillHeight: true
}
}
}
Dialog
{
id: aboutDialog
modal: true
focus: true
title: "About"
x: (window.width - width) / 2
y: window.height / 6
width: Math.min(window.width, window.height) / 3 * 2
contentHeight: aboutColumn.height
Column
{
id: aboutColumn
spacing: 20
Label
{
width: aboutDialog.availableWidth
text: "Qt Quick Controls 模塊提供了基於 Qt Quick 的下一代用戶界面控件。"
wrapMode: Label.Wrap
font.pixelSize: 12
}
Label
{
width: aboutDialog.availableWidth
text: "與 Qt Quick Controls 1 相比，Qt Quick Controls 更簡單、更輕量級、更快"
wrapMode: Label.Wrap
font.pixelSize: 12
}
}
}
}界面結構：
左邊的側面板
Drawer
{
id: drawer
width: Math.min(window.width, window.height) / 3 * 2
height: window.height
interactive: stackView.depth === 1
ListView
{
id: listView
focus: true
currentIndex: -1
anchors.fill: parent
delegate: ItemDelegate
{
width: listView.width
text: model.title
highlighted: ListView.isCurrentItem
onClicked:
{
listView.currentIndex = index
stackView.push(model.source)
drawer.close()
}
}
model: ListModel
{
ListElement { title: "BusyIndicator"; source: "qrc:/pages/BusyIndicatorPage.qml" }
ListElement { title: "Button"; source: "qrc:/pages/ButtonPage.qml" }
ListElement { title: "CheckBox"; source: "qrc:/pages/CheckBoxPage.qml" }
ListElement { title: "ComboBox"; source: "qrc:/pages/ComboBoxPage.qml" }
ListElement { title: "DelayButton"; source: "qrc:/pages/DelayButtonPage.qml" }
ListElement { title: "Dial"; source: "qrc:/pages/DialPage.qml" }
ListElement { title: "Dialog"; source: "qrc:/pages/DialogPage.qml" }
ListElement { title: "Delegates"; source: "qrc:/pages/DelegatePage.qml" }
ListElement { title: "Frame"; source: "qrc:/pages/FramePage.qml" }
ListElement { title: "GroupBox"; source: "qrc:/pages/GroupBoxPage.qml" }
ListElement { title: "PageIndicator"; source: "qrc:/pages/PageIndicatorPage.qml" }
ListElement { title: "ProgressBar"; source: "qrc:/pages/ProgressBarPage.qml" }
ListElement { title: "RadioButton"; source: "qrc:/pages/RadioButtonPage.qml" }
ListElement { title: "RangeSlider"; source: "qrc:/pages/RangeSliderPage.qml" }
ListElement { title: "ScrollBar"; source: "qrc:/pages/ScrollBarPage.qml" }
ListElement { title: "ScrollIndicator"; source: "qrc:/pages/ScrollIndicatorPage.qml" }
ListElement { title: "Slider"; source: "qrc:/pages/SliderPage.qml" }
ListElement { title: "SpinBox"; source: "qrc:/pages/SpinBoxPage.qml" }
ListElement { title: "StackView"; source: "qrc:/pages/StackViewPage.qml" }
ListElement { title: "SwipeView"; source: "qrc:/pages/SwipeViewPage.qml" }
ListElement { title: "Switch"; source: "qrc:/pages/SwitchPage.qml" }
ListElement { title: "TabBar"; source: "qrc:/pages/TabBarPage.qml" }
ListElement { title: "TextArea"; source: "qrc:/pages/TextAreaPage.qml" }
ListElement { title: "TextField"; source: "qrc:/pages/TextFieldPage.qml" }
ListElement { title: "ToolTip"; source: "qrc:/pages/ToolTipPage.qml" }
ListElement { title: "Tumbler"; source: "qrc:/pages/TumblerPage.qml" }
}
ScrollIndicator.vertical: ScrollIndicator { }
}
}中間放置一個列錶視圖，視圖有一個垂直的指示器。
當按下視圖中的項目時，對應的頁面進入棧視圖。
點擊工具欄中左邊的按鈕時，當前頁面出棧：
Action
{
id: navigateBackAction
icon.name: stackView.depth > 1 ? "back" : "drawer"
onTriggered:
{
if (stackView.depth > 1)
{
stackView.pop()
listView.currentIndex = -1
} else {
drawer.open()
}
}
}切換主題功能
在載入主界面的qml文件時賦予初始化屬性。
這個示例能值得一說的點就這些。
涉及到的類型和知識點：
- Settings
- Shortcut
- Action
- ToolButton
- Label
- Menu
- Drawer
- ListView
- StackView
- Pane
- Dialog
- ComboBox
- Page
- Flickable
- BusyIndicator
- Button
- CheckBox
- DelayButton
- SwipeDelegate
- CheckDelegate
- ItemDelegate
- RadioDelegate
- SwitchDelegate
- 委托的移除動畫
- ButtonGroup
- Frame
- RadioButton
- GroupBox
- PageIndicator
- ProgressBar
- RangeSlider
- ScrollIndicator
- ScrollBar
- Slider
- SpinBox
- SwipeView
- Switch
- TabBar
- TabButton
- TextArea
- TextField
- ToolTip
- Tumbler
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