Qt Quick在QML中的弹出层和弹窗

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Qt Quick在QML中的弹出层和弹窗

弹出层

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import QtQuick.Controls 2.15

// 保存选择的学段
property string selectedSegment
// 创建一个 Popup 组件
Popup {
  id: mPop
  width: 300
  height: 200
  modal: true // 设置为模态弹窗
  focus: true // 弹窗获得焦点
  anchors.centerIn: parent

  // 背景颜色
  background: Rectangle {
    color: "white"
    radius: 4
  }

  Column {
    anchors.fill: parent
    spacing: 10
    
    ListView {
      width:parent.width
      height:130
      model: segmentModel
      clip:true
      ScrollBar.vertical: ScrollBar {
        Component.onCompleted: {
          active = true;
        }
      }
      delegate: Item {
        width: parent.width
        height: 40
        Text {
          text: model.text
          font.family: "微软雅黑"
          anchors.centerIn: parent
          color:model.text == selectedSegment?"#339DFF":"#333"
        }
        MouseArea {
          anchors.fill: parent
          onClicked: {
            selectedSegment = model.text
            popup.close()
          }
        }
      }
    }

    Rectangle {
      width:parent.width
      height:1
      color:"#f3f3f3"
    }
    // 选择结果
    Text {
      width:parent.width
      height:40
      color:"#333"
      font.family: "微软雅黑"
      text: "已选学段: " + selectedSegment
    }
  }
}

打开

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mPop.open()

Toast实现

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property string toastMsg   
Popup {
  id: mPop

  width: toastText.width + 32
  height: 40
  modal: true // 设置为模态弹窗
  focus: true // 弹窗获得焦点
  anchors.centerIn: parent

  Text {
    id: toastText

    anchors.centerIn: parent
    text: toastMsg
    font.family: "微软雅黑"
    font.pixelSize: 14
    color: "#ffffff"
  }

  // 背景颜色
  background: Rectangle {
    color: Qt.rgba(0, 0, 0, 0.5)
    radius: 8
  }

}

显示Toast

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function onShowToast(msg) {
  console.log("onShowToast:" + msg);
  toastMsg = msg;
  mPop.open();
  CommonMethods.delayExecute(2000, this, () => {
    mPop.close();
  });
}

延迟执行参考

https://www.psvmc.cn/article/2025-01-02-qt-quick-qml-js.html

Dialog

系统自带的弹窗非常丑

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import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Controls 2.12

//消息框
Window {
  id: control
  color: "transparent"

  //宽度可以重新设置，宽度根据内容适应
  width: 360
  height: content_loader.height + headerHeight + footerHeight
  //无边框
  flags: Qt.FramelessWindowHint | Qt.Dialog
  //模态
  modality: Qt.ApplicationModal

  property alias showCancel: btn_cancel.visible
  property alias showOk: btn_ok.visible
  //默认的Text组件的文本值
  property string text: "消息提示"
  //标题
  property alias title: title_text.text

  //内容区域Loader加载的组件
  property alias content: content_loader.sourceComponent

  //标题栏高度
  property alias headerHeight: head_area.height
  //按钮栏高度
  property alias footerHeight: foot_area.height

  signal clickCancel
  signal clickOk

  //适配Dialog的open()接口
  function open() {
    control.resetPosition()
    control.show()
  }

  //恢复位置到屏幕中心
  function resetPosition() {
    control.setX((control.screen.width - control.width) / 2)
    control.setY((control.screen.height - control.height) / 2)
  }

  //背景
  Rectangle {
    anchors.fill: parent
    color: "white"
    border.color: "lightGray"
    clip: true
    radius: 8

    //用于拖拽对话框
    MouseArea {
      id: bg_mouse
      anchors.fill: parent
      property point clickPos: Qt.point(0, 0)
      property bool dragMoving: false
      onPressed: {
        dragMoving = true
        clickPos = Qt.point(mouseX, mouseY)
      }
      onReleased: {
        dragMoving = false
      }
      onPositionChanged: {
        if (!dragMoving) {
          return
        }
        control.setX(control.x + mouseX - clickPos.x)
        control.setY(control.y + mouseY - clickPos.y)
      }
    }
  }

  //标题栏 header
  Item {
    id: head_area
    width: parent.width
    //设置标题文本后更高点
    height: title_text.text ? 50 : 30
    //预留的标题栏文本
    Text {
      id: title_text
      anchors.centerIn: parent
      color: "#444444"
      font.pixelSize: 16
      font.family: "Microsoft YaHei"
      text: "提示"
    }
  }

  Rectangle {
    y: headerHeight - 1
    color: "#f3f3f3"
    width: parent.width
    height: 1
  }

  //中间内容区域
  Loader {
    id: content_loader
    x: 30
    y: headerHeight
    width: parent.width - 60
    height: sourceComponent.height

    sourceComponent: Text {
      color: "#666666"
      font.pixelSize: 14
      font.family: "Microsoft YaHei"
      wrapMode: Text.WrapAnywhere
      text: control.text
      verticalAlignment: Text.AlignVCenter
      horizontalAlignment: Text.AlignHCenter
    }
  }

  //底部按钮区域 footer
  Item {
    id: foot_area
    width: parent.width
    //显示按钮后更高点
    height: button_row.height + 30
    anchors.bottom: parent.bottom

    FocusScope {
      anchors.fill: parent
      focus: true
      Keys.onEscapePressed: control.hide()

      //底部按钮行
      Row {
        id: button_row
        anchors.centerIn: parent
        spacing: 20

        //这里反正也没几个按钮，就不把Button单独定义了
        //因为可能对单个按钮设置文本或者其他样式，Repeater也不用了
        Button {
          id: btn_cancel
          visible: true
          text: "取消"
          contentItem: Text {
            text: parent.text
            color: parent.hovered ? "white" : "#666666"
            font.pixelSize: 14
            font.family: "Microsoft YaHei"
            horizontalAlignment: Text.AlignHCenter
            verticalAlignment: Text.AlignVCenter
            elide: Text.ElideRight
          }
          background: Rectangle {
            implicitWidth: 65
            implicitHeight: 32
            color: parent.hovered ? "#4A6FD3" : "white"
            border.color: "#D9D9D9"
            border.width: 1
            radius: 4
          }
          onClicked: {
            control.hide()
            control.clickCancel()
          }
        }

        Button {
          id: btn_ok
          text: "确认"
          visible: true
          //默认焦点为确认
          focus: true
          contentItem: Text {
            text: parent.text
            color: parent.hovered ? "white" : "#666666"
            font.pixelSize: 14
            font.family: "Microsoft YaHei"
            horizontalAlignment: Text.AlignHCenter
            verticalAlignment: Text.AlignVCenter
            elide: Text.ElideRight
          }
          background: Rectangle {
            implicitWidth: 65
            implicitHeight: 32
            color: parent.hovered ? "#4A6FD3" : "white"
            border.color: "#D9D9D9"
            border.width: 1
            radius: 4
          }
          onClicked: {
            control.hide()
            control.clickOk()
          }
        }
      }
    }
  }
}

使用

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// 学段数据模型
ListModel {
  id: segmentModel
  ListElement {
    text: "小学"
  }
  ListElement {
    text: "初中"
  }
  ListElement {
    text: "高中"
  }
  ListElement {
    text: "大学"
  }
}
// 保存选择的学段
property string selectedSegment

Components.ZDialog {
  id: segmentDialog
  title: "选择扫描仪"
  content: ListView {
    width: parent.width
    height: 120
    model: segmentModel
    clip: true
    ScrollBar.vertical: ScrollBar {
      Component.onCompleted: {
        active = true
      }
    }
    delegate: Item {
      width: parent.width
      height: 40

      Rectangle {
        anchors.fill: parent
        Text {
          text: model.text
          font.family: "微软雅黑"
          anchors.centerIn: parent
          color: model.text === selectedSegment ? "#339DFF" : "#333"
        }
        MouseArea {
          anchors.fill: parent
          hoverEnabled: true
          onEntered: parent.color = "#f3f3f3"
          onExited: parent.color = "transparent"
          onClicked: {
            selectedSegment = model.text
            segmentDialog.close()
          }
        }
      }
    }
  }
}