qml

问题 Consider the following python3 PyQt code to display an interactive matplotlib graph with toolbar import sys, sip import numpy as np from PyQt5 import QtGui, QtWidgets from PyQt5.Qt import * from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas from matplotlib.backends.backend_qt5agg import NavigationToolbar2QT as NavigationToolbar import matplotlib.pyplot as plt app = QApplication(sys.argv) top = QWidget() fig = plt.figure() ax = fig.gca() x = np.linspace(0,5,100)

问题 I have a MapPolyline object in my QtQuick Project. I need to change the path property from the C++ file, but I have no idea how to do that. My qml - File: MapPolyline { id: mapline objectName: "MapLine" line.width: 5 line.color: "green" path: {[ { latitude: 47.219791, longitude: 9.546032 }, { latitude: 47.219657, longitude: 9.542508 }, { latitude: 47.2194446, longitude: 9.5437876 } ]} } And now I want to change the content of the path property from the C++ file. Thanks for the help! 回答1: Qt

问题 I have a GridLayout dynamicLayout which has dynamically created/destroyed elements. Create/destroy happens when I click a Button myButton , for which I also provided the code below. GridLayout { id: dynamicLayout anchors.fill: parent Component { id: imageComponent Image { visible: true function deleteImage() { console.log("destroying image") destroy() } } } } Button { id: myButton visible: true x: 200 y: 200 onClicked: { createImageObjects(); } } function createImageObjects() { if

问题 I have a GridLayout dynamicLayout which has dynamically created/destroyed elements. Create/destroy happens when I click a Button myButton , for which I also provided the code below. GridLayout { id: dynamicLayout anchors.fill: parent Component { id: imageComponent Image { visible: true function deleteImage() { console.log("destroying image") destroy() } } } } Button { id: myButton visible: true x: 200 y: 200 onClicked: { createImageObjects(); } } function createImageObjects() { if

问题 I have an example multi-level ListModel: ListModel{ id: myModel ListElement{ name: "File" subItems:[ ListElement{ name: "Open" }, ListElement{ name: "Open Recent" subItems:[ ListElement{ name: "Bla.txt" } ] }, ListElement{ name: "Save" }, ListElement{ name: "Save as" }, ListElement{ name: "Exit" } ] } ListElement{ name: "Edit" subItems:[ ListElement{ name: "Undo" }, ListElement{ name: "Redo" }, ListElement{ name: "Select All" } ] } ListElement{ name: "Help" subItems:[ ListElement{ name:

问题 I have Rectangle filled with MouseArea which on onPressAndHold() handler reveals second Rectangle and transfers drag action to that Rectangle . The problem is that when I move that second Rectangle over DropArea it doesn't notify about any actions ( onEntered , onExited , onDropped ). I tried to do this in many combinations but it has never worked. Here is an example, am I missing something? import QtQuick 2.0 import QtQuick.Window 2.0 Window { id: appDrawerRoot visible: true width: 360;

问题 I have Rectangle filled with MouseArea which on onPressAndHold() handler reveals second Rectangle and transfers drag action to that Rectangle . The problem is that when I move that second Rectangle over DropArea it doesn't notify about any actions ( onEntered , onExited , onDropped ). I tried to do this in many combinations but it has never worked. Here is an example, am I missing something? import QtQuick 2.0 import QtQuick.Window 2.0 Window { id: appDrawerRoot visible: true width: 360;

问题 There are many tutorials how to build an application with Qt for Android. So I do it in these steps: Installed Android SDK, NDK, JDK and Apache Ant Installed Qt 5.2 for Android Created simple QML application. Configured virtual device from AVD Manager I tried to run it and it bringed up Emulator window with my app. OK, it is going as expected. Now I want to run it on real device. I have Samsung Galaxy Tab 2 10.1 P5100 so I enabled USB debug and connected it to PC. But when I run the

问题 There are many tutorials how to build an application with Qt for Android. So I do it in these steps: Installed Android SDK, NDK, JDK and Apache Ant Installed Qt 5.2 for Android Created simple QML application. Configured virtual device from AVD Manager I tried to run it and it bringed up Emulator window with my app. OK, it is going as expected. Now I want to run it on real device. I have Samsung Galaxy Tab 2 10.1 P5100 so I enabled USB debug and connected it to PC. But when I run the

问题 I am using Qt 5.4.1. I have made a custom slider element to be used in other qml components like so: Slider.qml import QtQuick 2.4 import QtQuick.Controls 1.3 import QtQuick.Controls.Styles 1.3 Item { id: root width: 150 height: 30 property int val: slider.value property int maxVal: slider.maximumValue property int minVal: slider.minimumValue property int step: slider.stepSize Slider { id: slider anchors.margins: 20 stepSize: step maximumValue: maxVal minimumValue: minVal style: customStyle /