qt

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 /

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 /

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 /

问题 changing the style of a component, seems to replace all the features of the default style. is there a way to change only one feature? For example, suppose i want a red button; import QtQuick 2.7 import QtQuick.Controls 1.4 import QtQuick.Controls.Styles 1.4 ApplicationWindow { visible: true width: 640 height: 480 Button { height: 200 width: 200 text: "Press me" style: ButtonStyle { // changes background but also throws away everything else // in standard button style background: Rectangle {

问题 I would like to create automated tests for a Qt's app with selenium + QtWebDriver . I have read the QtWebDriver's wiki , and some questions on stackoverflow like this one However, I'm still not able to use QtWebDriver . I don't understand how to link selenium and QtWebDriver together. there are a lot of questions that I can't answer. How can I use Python to create automated tests for my own Qt's App based on selenium + QtWebDriver ? How can I link my Qt's app with selenium + QtWebDriver ?

问题 I am writing an application which will allow the user to scrub through an open video. Developing on Windows 7/8 with Qt 5.3, I have been using QMediaPlayer and QVideoWidget following the qvideowidget example project. The result has been pretty good, except that the QVideoWidget seems only to update during idle time. Still, it's a good start and it's usable. However, when I build on Mac OS 10.10 (again with Qt 5.3), scrubbing behaves as though there were only one frame per second in the video.

问题 I am writing an application which will allow the user to scrub through an open video. Developing on Windows 7/8 with Qt 5.3, I have been using QMediaPlayer and QVideoWidget following the qvideowidget example project. The result has been pretty good, except that the QVideoWidget seems only to update during idle time. Still, it's a good start and it's usable. However, when I build on Mac OS 10.10 (again with Qt 5.3), scrubbing behaves as though there were only one frame per second in the video.

问题 What I want: http://puu.sh/3oUjh.jpg What I have: http://puu.sh/3oUnI.png The toolbar is made in mainwindow.ui, ive tried ui->_toolbar->setLayoutDirection(Qt::LeftToolBarArea); But I get this error: no matching function for call to 'QToolBar::setLayoutDirection(Qt::ToolBarArea)' 回答1: You can use QToolBar::orientation property: ui->myToolbar->setOrientation(Qt::Vertical); You can also use QMainWindow::addToolBar : addToolBar(Qt::LeftToolBarArea, ui->myToolbar); Note that by default the user is

问题 I am trying display a toast on the Java method call from C++ side I have managed to call that method and even getting string but Toast is not working I have tried almost everything with context and all C++ Side JavaVMAttachArgs args = { JNI_VERSION_1_6, NULL, NULL }; vm->AttachCurrentThread( &env, &args ); activityConstructor = env->GetMethodID(activity, "<init>", "()V"); jobject object = env->NewObject(activity, activityConstructor); toastID = env->GetMethodID(activity, "toast", "(Ljava/lang

问题 If QML is used for GUI and Java for developing API for a linux based device,How to interface QML with Java? 回答1: One approach for cross platform integration is using web service. I would probably expose my Java code as a RESTful web service (See JAX-RS) and invoke it from QML using XMLHttpRequest. It's also worth mentioning Java GUI library such as swing / JavaFX has cross platform capability, so it should still run on Linux (and whichever platform runs Java). You might not need to write QML