Question

如何创建一个按钮，每次单击按钮，该按钮会将形状的y值上移10个？到目前为止，这就是我所拥有的，但是它只会一次推升y值。我有一个QML文件，一个cpp文件和一个.pro文件，下面这三件事的代码。

Main.cpp文件：

#include <QGuiApplication>
#include <QQuickView>
#include <QQmlApplicationEngine>



int main(int argc, char *argv[])
{

    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QGuiApplication app(argc, argv);

    QQuickView view;
    view.setSource(QUrl("qrc:/qml/MyRectangle/MyRectangle.qml"));
    if (!view.errors().isEmpty())
        return -1;
    view.show();


    app.exec();


}

MyRectangle.qml文件：

// This is the shape I want to move up the y axis 
Rectangle {
    id: rectangle333
    x: 461
    y: 187
    width: 731
    height: 1
    color:"#ef5350"
    z: 2
}

// This is the "button" I want the user to press, that would trigger the movement.
Rectangle {
   id: myRect
   width: 18
   height: 18
   color: "transparent"
   x: 232
   y: 250
   z:132

MouseArea {
    id: mouseArea5
    anchors.fill: parent
    onClicked: myRect.state == 'clicked' ? myRect.state = "" : 
    myRect.state = 'clicked';
}

states: [
     State {
     name: "clicked"
// Rectangle333 is the id of the shape that I want to move up the y axis.
     PropertyChanges { target: rectangle333; y:1}

      }
       ]
        }

Answer 1

使用states不适合您的用例。

您只需在Rectangle处理程序中将onClicked的y减小10。它很简单：

import QtQuick 2.11
import QtQuick.Controls 2.4

Item
{
   Rectangle
   {
       id: rectangle333
       color:"#ef5350"
       y: 50
       width: parent.width
       height: 1
   }

   Button
   {
       anchors.centerIn: parent
       text: "Move line up"
       onClicked: rectangle333.y-=10
   }

}

如何创建一个按钮，每次单击按钮，该按钮会将形状的x值上移？

1 个答案: