qml

问题 I'm trying to make an application that uses QML QCharts to visualize data. The program is crashing at startup before a window even appears. I tried on both macOS and Windows 10 with the same results. I have included a minimally working example below. main.py : import sys from PySide2.QtGui import QGuiApplication from PySide2.QtQml import QQmlApplicationEngine from PySide2.QtCore import QUrl import qml_rc if __name__ == "__main__": app = QGuiApplication(sys.argv) engine = QQmlApplicationEngine

问题 I am trying to convert an existing PySide2/QtWidgets application to PySide2/QML. I am trying to get a list of custom objects from a Python service call via a QML MouseArea click. I currently have a main script ( main.py ) that launches a QQuickView containing my QML (contained in main.qml ). It also registers a custom type for my model ( Role , defined in role.py ) and exposes an instance of my service class (contained in mock_role_service.py ) to the view's root context. My QML displays

问题 I am developing a project by seperating ui.qml files and .qml files . So, I am writing the functionality codes(javascript codes) into .qml file and I am writing design codes in ui.qml file . However I have a problem with using Component.onComplete functionality in .qml file. for example : MapDisplayForm.ui.qml Item{ id:item1 property alias map1 Map{ id: map1 Component.OnCompleted : { //this is the function that i should write in Map.qml } } } MapDisplay.qml MapDisplayForm{ //it does not

问题 I want to put a number of rectangles as overlays to show regions of interest on a ChartView of ScatterSeries. However when I try to do this it is clearly using a different coordinate system to that of the ScatterSeries as it is drawn in a completely different place. For example the following is intended to draw a rectangle that captures all of the ScatterSeries but it just draws a small green rectangle top left as shown in the screenshot. ChartView { id: view Layout.fillWidth : true Layout

问题 I'm trying to figure out a way to layout items proportionally by specifying a kind of weight for each item. For example the way Android does their layouts. The way I'm trying to achieve it is like so: import QtQuick 2.10 import QtQuick.Controls 2.3 import QtQuick.Layouts 1.3 GridLayout { columns: 4 width: 640 height: 480 Rectangle { color: "red" Layout.fillHeight: true Layout.fillWidth: true Layout.columnSpan: 1 } Rectangle { color: "#80000000" Layout.fillHeight: true Layout.fillWidth: true

问题 I'm using Qml 5.12 and basically trying to set an implicitWidth to a GridLayout. For that, I have a purple rectangle and set the rectangle's width to the GridLayout. The red rectangle fit with the GridLayout so I can see the width of my GridLayout. Here's my code: Rectangle { anchors.fill: gl; color: "red"; opacity: 0.22 } Rectangle { id: rect; width: 350; height: 30; color: "purple"; } GridLayout { id: gl y: 35 implicitWidth: rect.width columns: 2 Label { text: "This is a test" } SpinBox {

问题 My UI contains a Text field with horizontalAlignment: Text.AlignJustify maximumLineCount: 5 wrapMode: TextEdit.WordWrap elide: Text.ElideRight When the text does not fit, the last line should end with "... MORE" where "MORE" should be focusable. This will probably be a separate Text field where the visibility is controlled by whether or not the text is elided. But how can I detect when a Text gets elided? 回答1: When a Text gets elided, it is truncated. Here's a simple example: Text { id:

问题 I have a QVariantMap created in C++ from a JSON object and I want to update this object from QML. I set it as a context property. // main.cpp engine.rootContext()->setContextProperty("myjson", myqvariantmap); In QML I tried updating its properties but it seems to be read-only. The docs support this, saying Mind that QVariantList and QVariantMap properties of C++ types are stored as values and cannot be changed in place by QML code. You can only replace the whole map or list, but not

问题 I developing qml project in that i want to add functionality of changing background color .. for that i create one combo box with items {red,blue,white} and create one update button to update color when user select red item and click on update background color change as red so how can i do ?? Button { id: button1 x: 284 y: 95 width: 114 height: 34 text: qsTr("Update") contentItem: Text { font: control.font opacity: enabled ? 1.0 : 0.3 text: "Update" //Font.pixelSize:15 horizontalAlignment:

问题 I have a form where i've done a custom field that only accepts the top, right and bottom arrows. But to accept the tab navigation i'm using the following chain of functions: nextItemInFocusChain().forceActiveFocus() The problem is that this is working on windows but not on mac ... I've a formulary to illustrate the problem where next to that "code text field" i have a comboBox where i want, that when the user clicks on tab in the "code text field" to navigate to. It seems that it only