I am using OpenSceneGraph 3.0.1 and having a problem with the Qt integration using the
osgQt::GLWidget when adding it to a tab control during startup (inside the constructor of my main window.
MainWindow::MainWindow(QWidget* parent)
: QMainWindow(parent), ui(new Ui::MainWindow)
{
ui->setupUi(this);
QWidget* viewerWidget = new MyViewerWidget(new osgViewer::Viewer());
ui->tabWidget->addTab(viewerWidget, "My Osg View");
// tab entry was added but nothing to see than empty Osg Window
}
It works, when calling the code from a menu after displaying the main window:
void gcdrp::MainWindow::on_actionCreate_Simulation_View_triggered()
{
QWidget* viewerWidget = new MyViewerWidget(new osgViewer::Viewer());
ui->tabWidget->addTab(viewerWidget, "My Osg View");
// tab with content is visible (as expected)
}
It seems like the scene graph is screwed up. Any ideas?
Works with setMinimumSize:
QWidget* viewerWidget = new MyViewerWidget(new osgViewer::Viewer());
viewerWidget->setMinimumSize( ui->tabWidget->width(), ui->tabWidget->height());
Related
I want to be able to change page of QStackedWidget with some kind of animation (like fade in/out or others...)
after some research I find out maybe its possible with QGraphicsOpacityEffect, then I found this codes in here
Fade In Your Widget
// w is your widget
QGraphicsOpacityEffect *eff = new QGraphicsOpacityEffect(this);
w->setGraphicsEffect(eff);
QPropertyAnimation *a = new QPropertyAnimation(eff,"opacity");
a->setDuration(350);
a->setStartValue(0);
a->setEndValue(1);
a->setEasingCurve(QEasingCurve::InBack);
a->start(QPropertyAnimation::DeleteWhenStopped);
Fade Out Your Widget
// w is your widget
QGraphicsOpacityEffect *eff = new QGraphicsOpacityEffect(this);
w->setGraphicsEffect(eff);
QPropertyAnimation *a = new QPropertyAnimation(eff,"opacity");
a->setDuration(350);
a->setStartValue(1);
a->setEndValue(0);
a->setEasingCurve(QEasingCurve::OutBack);
a->start(QPropertyAnimation::DeleteWhenStopped);
connect(a,SIGNAL(finished()),this,SLOT(hideThisWidget()));
// now implement a slot called hideThisWidget() to do
// things like hide any background dimmer, etc.
but looks like these codes have some problem when used in QWidget inside of QStackedWidget i mean widget successfully fade in and out, but after animation finish if I minimize the windows the widget will disappear completely! (Im still able to see widget in bottom right corner of my window, looks like its pos changed?!)
btw my program is frameless.
thanks for help.
here is a example from my problem
test.cpp
Test::Test(QWidget *parent)
: CustomMainWindow(parent)
{
ui.setupUi(this);
setShadow(ui.bg_app);
connect(ui.close_app_btn, &QPushButton::clicked, this, &QWidget::close);
connect(ui.minimize_app_btn, &QPushButton::clicked, this, &QWidget::showMinimized);
QGraphicsOpacityEffect* eff = new QGraphicsOpacityEffect(this);
ui.checking->setGraphicsEffect(eff); // checking is my widget inside of QStackedWidget.
QPropertyAnimation* a = new QPropertyAnimation(eff, "opacity");
a->setDuration(350);
a->setStartValue(0);
a->setEndValue(1);
a->setEasingCurve(QEasingCurve::InBack);
a->start(QPropertyAnimation::DeleteWhenStopped);
}
CustomMainWindow.cpp
CustomMainWindow::CustomMainWindow(QWidget *parent)
: QMainWindow(parent)
{
setWindowFlags(windowFlags() | Qt::Window | Qt::FramelessWindowHint | Qt::WindowSystemMenuHint);
setAttribute(Qt::WA_TranslucentBackground);
}
void CustomMainWindow::setShadow(QWidget* window)
{
QGraphicsDropShadowEffect* windowShadow = new QGraphicsDropShadowEffect;
windowShadow->setBlurRadius(9.0);
windowShadow->setColor(palette().color(QPalette::Highlight));
windowShadow->setOffset(0.0);
window->setGraphicsEffect(windowShadow);
}
when I run my program with this code, at first its successfully Fade In, but if I for example minimize the window the widget move from its original position to somewhere else, look at this gif
Note: MainWindow is the name of my class.
Header file:
//...
private slots:
void animationStackedWidgets();
void whenAnimationFinish();
//....
CPP file:
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
connect(ui->button, &QPushButton::clicked, this, &MainWindow::animationStackedWidgets);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::animationStackedWidgets()
{
QGraphicsOpacityEffect *effect = new QGraphicsOpacityEffect(this);
ui->stackedWidget->setGraphicsEffect(effect);
QPropertyAnimation *anim = new QPropertyAnimation(effectSw,"opacity");
anim->setDuration(350);
anim->setStartValue(0);
anim->setEndValue(1);
anim->setEasingCurve(QEasingCurve::InBack);
anim->start(QPropertyAnimation::DeleteWhenStopped);
connect(anim, SIGNAL(finished()), this, SLOT(whenAnimationFinish()));
}
void MainWindow::whenAnimationFinish()
{
ui->stackedWidget->setGraphicsEffect(0); // remove effect
}
I have a Qt application which simply captures from the default webcam and shows it on a QVideoWidget. In the ui, I have a simple MainWindow with a QGraphicsView inside a VerticalLayout:
ui design
My mainwindow.cpp=============================================
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
m_viewfinder = new QVideoWidget(ui->captureView);
m_camera = new QCamera(QCameraInfo::defaultCamera());
m_camera->setViewfinder(m_viewfinder);
m_camera->start();
}
MainWindow::~MainWindow()
{
m_camera->stop();
delete m_viewfinder;
delete m_camera;
delete ui;
}
When I execute this, I get the application running, but the video contents do not scale according to the mainwindow size. Examples:
When I start the application
Resizing mainwindow down
Resizing mainwindow up
Is there some way to make the video content resize well and fit the available area?
I have seen this answer: QVideoWidget: Video is cut off, but it doesn't offer any solution that works for me. When use the QGraphicsView-QGraphicsScene-QGraphicsVideoItem chain, I see nothing at all.
When you use the following instruction:
m_viewfinder = new QVideoWidget(ui->captureView);
You are setting as the parent of m_viewfinder to captureView, so the positions of m_viewfinder will be relative to captureView, but this does not indicate that it will be the same size as the parent.
One of the easiest ways to do this is to use a layout. Also, it is not necessary to create the QGraphicsWidget or the QVBoxLayout, so I recommend you to delete it and get the design as it was established by default:
and then we establish a layout that is placed in the centralWidget, and in this layout we add the QVideoWidget.
...
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
m_viewfinder = new QVideoWidget;
QVBoxLayout *lay = new QVBoxLayout(ui->centralWidget);
lay->addWidget(m_viewfinder);
m_camera = new QCamera(QCameraInfo::defaultCamera());
m_camera->setViewfinder(m_viewfinder);
m_camera->start();
}
...
In the following link you can find the complete example.
I'm trying to display a Q3DScatter graph in a Main Window designed with Qt Designer so I've added a widget to the main window but I don't know how to embed the graph object in this widget. I tried to create a widget "container" programmatically and embed the graph in it and then putting the widget in a QHBoxLayout (which has been added to the main window using Qt Designer) using the following code in my main window's constructor:
...
Q3DScatter *graph = new Q3DScatter();
QWidget *container = QWidget::createWindowContainer(graph);
ui->horizontal_layout->addWidget(container, 1);
But the window appears to be empty when executing. I'd really appreciate some help.
EDIT: Here's the full code of my main window constructor:
ResultsWindow::ResultsWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::ResultsWindow)
{
ui->setupUi(this);
Q3DScatter *graph = new Q3DScatter();
QWidget *container = QWidget::createWindowContainer(graph);
ui->horizontal_layout->addWidget(container, 1);
}
And here's the main code:
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
ResultsWindow w;
w.show();
return a.exec();
}
EDIT 2: I forgot to specify that the horizontal layout is embedded in a GridLayout. I tried to create a new project and my code actually works perfectly when I add a horizontal layout directly to the main window. So could the problem be due to the GridLayout?
I'm trying to add buttons to a vertical layout in QT.
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
ui.setupUi(this);
mRootLayout = new QVBoxLayout(this);
setLayout(mRootLayout);
mRootLayout->addWidget(new QPushButton("Button1", this));
mRootLayout->addWidget(new QPushButton("Button2", this));
}
I have 2 problems
1. The buttons are created on top of the menu bar
2. The buttons are not one under the other one.
I'm using a QVBoxLayout.
I think code must be change to:
mRootLayout = new QVBoxLayout(ui->centralWidget);
mRootLayout->addWidget(new QPushButton("Button1", this));
mRootLayout->addWidget(new QPushButton("Button2", this));
It's not necessary do setLayout().
I'm using QGraphicsView / QGraphicsScene and added a QTestEdit-Widget. Unfortunately, the TextEdit gets rendered with a gray bar below, and I'm unable to get rid of it. Does anyone know how to achieve this?
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
QGraphicsView *view = new QGraphicsView(ui->centralWidget);
QGraphicsScene *scene = new QGraphicsScene(0, 0, 2000, 2000, view);
scene->setSceneRect(-100,-100,400,400);
view->setTransformationAnchor(QGraphicsView::NoAnchor);
view->setScene(scene);
QTextEdit *edt_test = new QTextEdit(0);
edt_test->setGeometry(10,20,80,60);
edt_test->setFrameStyle(QFrame::Plain | QFrame::Box);
scene->addWidget(edt_test);
}
using StyleSheet didn't solve the problem, but the following worked fine:
QTextEdit *edt_test = new QTextEdit(0);
QGraphicsProxyWidget *proxy = scene->addWidget(edt_test);
edt_test->setFrameStyle(QFrame::Plain | QFrame::Box);
proxy->setGeometry(QRectF(10,20,80,60));
calling setGeometry based on the ProxyWidget is the solution. Seems weird ...