Question

我尝试使用Python的QML GUI制作一个简单的计算器。当我给出一些像（a = 4，b = 6，c = a + b）和点击按钮的值时，它可以给出一个结果。但是我无法在python中管理TextInput框。当我给输入框赋值时，如何在Python中使用文本输入框？感谢

QML GUI：

http://postimg.org/image/o9wt326g5/

QML代码：

import QtQuick 1.1

Rectangle {
    id:r
    anchors.centerIn: parent
    width: 200
    height: 200

    signal messageRequired;
    function updateMessage(text) {
        messageText.text = text
    }
    Column{
        width: r.width*0.8
        height: r.height*0.8
        spacing: 10

        anchors.centerIn: parent
        Row{
            id:ro
            spacing:10
            Text {
                anchors.centerIn: ro.parent
                font.bold: true
                text: "a"
            }
            TextInput {
                id: a
                width: r.width*3/4
                height: 20
                selectionColor: "#2f8bc5"
                fillColor: "lightgray"
                font.bold: true
            }

        }

        Row{
            spacing:10
        Text {
            text: "b"
            font.bold: true
            }
        TextInput {
            id: b
            width: r.width*3/4
            height: 20
            fillColor: "lightgray"
            font.bold: true
            }
        }

        Rectangle {
            id: calculate
            width: r.width
            height: 30
            color: "#8a0800"

            Text{
                anchors.centerIn: calculate
                font.bold: true
                text:"calculate";color:"white"
                }


            MouseArea {
            anchors.fill: parent
            onClicked:messageRequired()
        }

            gradient: Gradient {
                GradientStop {position: 0; color: "#8a0800"}
                GradientStop {position: 1; color: "#330009"}
            }
        }
        Row{
            spacing:10
        Text {
            text: "c"
            font.bold: true
        }
        TextInput {
            id: messageText

            font.bold: true
            width: r.width*3/4
            height: 20
            fillColor: "lightgray"
            selectionColor: "#2f8bc5"
            font.pixelSize: 12
        }}}}

和Python代码：

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import math
import sys
from PySide.QtCore import *
from PySide.QtGui import *
from PySide.QtDeclarative import QDeclarativeView

# Create Qt application and the QDeclarative view
app = QApplication(sys.argv)
#------------------------------------
a=6
b=4
c=a+b
#------------------------------------------
class Now(QObject):
    now = Signal(str)
    def emit_now(self):
        formatted_date = str(c)
        self.now.emit(formatted_date)

now = Now()
#------------------------------------
qt_view = QDeclarativeView()
qt_view.setResizeMode(QDeclarativeView.SizeRootObjectToView)
# Create an URL to the QML file
url = QUrl('view.qml')
# Set the QML file and show
qt_view.setSource(url)
qt_view.show()
rootObject = qt_view.rootObject()

rootObject.messageRequired.connect(now.emit_now)

now.now.connect(rootObject.updateMessage)
# Enter Qt main loop
sys.exit(app.exec_())

如何使用QML在Python中使用TextInput？

0 个答案: