I have set up a simple 3d scene with a custom QGeometryRenderer and QGeometry. The custom QGeometry is loaded from a ply file.
class ColorMeshGeometry : public Qt3DRender::QGeometry
{
Q_OBJECT
public:
ColorMeshGeometry(QString meshFile, ColorMeshRenderer *parent);
~ColorMeshGeometry();
void GeometryCenter(QVector3D* center);
};
class ColorMeshRenderer : public Qt3DRender::QGeometryRenderer
{
ColorMeshGeometry* m_geometry;
Q_OBJECT
public:
explicit ColorMeshRenderer(QString meshFile, Qt3DCore::QNode *parent = 0)
{
m_geometry = new ColorMeshGeometry(meshFile, this);
setGeometry(m_geometry);
}
~ColorMeshRenderer();
void ViewCenter(QVector3D* center);
};
And here is the code to set it all up:
uto view = new Qt3DExtras::Qt3DWindow();
auto container = createWindowContainer(view, this);
auto rootEntity = new Qt3DCore::QEntity();
ColorMeshRenderer* mesh = new ColorMeshRenderer(filename, rootEntity);
view->defaultFrameGraph()->setClearColor(QColor(QRgb(0x111111)));
view->camera()->lens()->setPerspectiveProjection(45.0f, view->width()/view->height(), 0.01f, 100000.0f);
view->camera()->setPosition(QVector3D(0.f, -512.f, 500.0f));
view->camera()->setViewCenter(QVector3D(0, 0, 0));
auto material = new Qt3DExtras::QPerVertexColorMaterial(rootEntity);
auto picker = new Qt3DRender::QObjectPicker(rootEntity);
picker->setHoverEnabled(false);
picker->setDragEnabled(false);
auto plyEntity = new Qt3DCore::QEntity(rootEntity);
plyEntity->addComponent(mesh);
plyEntity->addComponent(material);
plyEntity->addComponent(picker);
connect(picker, &Qt3DRender::QObjectPicker::pressed, this, &ViewerWidget::picker_Clicked);
Qt3DExtras::QOrbitCameraController *camController = new Qt3DExtras::QOrbitCameraController(rootEntity);
camController->setCamera(view->camera());
view->setRootEntity(rootEntity);
The QObjectPicker::pressed event is never fired. If I use the Qt3DExtras::QTorusMesh instead, the pressed event is fired. What else needs to be implemented for the QObjectPicker to work with a custom mesh?
Edit:
Full sample code can be found here.
The fix for this ended up being the Perspective Projection. The back pane of the project ended up being way to far way, the fix is:
view->camera()->lens()->setPerspectiveProjection(45.0f, view->width()/view->height(), 0.01f, 5000.0f);
Related
I have a QHBoxLayout in which I added some widgets. I need to be able to refresh the layout dynamically so I use this to clear the layout :
void ClearLayout(QLayout* layout)
{
if (!layout)
return;
QLayoutItem* item;
while ((item = layout->takeAt(0)) != nullptr)
{
delete item->widget();
ClearLayout(item->layout());
}
}
This indeed removes all widgets and layouts. After this layout->isEmpty() returns true and layout->count() returns 0.
However, when I try to add new widgets (same type of other previously added but new instance) It does not work !
AddWidget()
{
// DeviceWidget inherits QWidget
DeviceWidget* deviceWidget = new DeviceWidget;
deviceWidget->setFixedSize(150, 200);
connect(deviceWidget->GetSignalObject(), &DeviceObject::Selected, this,
&DeviceLayout::SelectedDevice);
layout->addWidget(deviceWidget, 0, Qt::AlignCenter);
}
This is the same function used previously to add the widgets to the layout and worked the first time at Construction:
MainLayout(QWidget* parent) : QHBoxLayout(parent)
{
layout = new QHBoxLayout;
addLayout(layout);
uint32 nb = GetDeviceNumber(); // returns 2
for (uint32 i = 0; i < deviceNb; ++i)
AddDeviceWidget();
}
After trying to add 2 widgets I have layout->isEmpty() returns true and layout->count() returns 2 so I'm confused …
thanks for any help provided :)
EDIT:
The problem seems to be comming from my DeviceWidget class since trying to add a simple QLabel to the cleared layout worked. Here's the DeviceWidget Constructor:
DeviceWidget::DeviceWidget(QWidget* parent) : QWidget(parent)
{
QVBoxLayout* vLayout = new QVBoxLayout;
QLabel* deviceIcon = new QLabel("DeviceIcon", this);
deviceIcon->setFixedSize(128, 128);
deviceIcon->setPixmap(QPixmap::fromImage(QImage("Resources/Icons/device.png")));
deviceIcon->setObjectName("DeviceIcon");
// StatusWidget inherits QWidget
// Just override paintEvent to display a colored filled disk
m_status = new StatusWidget(20, Status::Close, this);
m_status->setObjectName("DeviceStatus");
vLayout->addWidget(deviceIcon, 0, Qt::AlignCenter);
vLayout->addWidget(m_status, 0, Qt::AlignCenter);
// DeviceObjct inherits from QObject an add a signal
m_object = new DeviceObject(size());
// Function clearing the stylesheet background-color
Clear();
setLayout(vLayout);
installEventFilter(this);
setObjectName(QString("DeviceWidget"));
}
Commenting installEventFilter(this) make it work so I think I need to add an event filter to make it work but I don't know which one
As said in the Edit, The problem is coming from DeviceWidget added in the layout that override eventFilter. There is probably a way to add a case in eventFilter to make it work but in my case it was best either (1) or (2):
1. Remove eventFilter from class DeviceWidget and put it in class DeviceObject: m_object is present to emit a signal according to event:
DeviceObject.h:
DeviceObject(QObject* parent);
bool eventFilter(QObject* obj, QEvent* event) override;
signals:
void Select(uint32 i);
Then in class DeviceWidget still call installEventFilter but with m_object as parameter: installEventFilter(m_object);
For the other event (Enter/Leave) I overrode void enterEvent(QEvent* event) and void leaveEvent(QEvent* event) for class DeviceWidget. That's what lead me to the second option that seems better.
2. Completely remove eventFilter and installEventFilter as it is only used to emit a signal when widget is clicked and do things when cursor hovers the widget. Instead override enterEvent and leaveEvent for class DeviceWidget like said before for hover event.
Then in class DeviceObjecy override void mousePressEvent(QMouseEvent*) for clicked event.
I have an one function which is responsible for initializing custom widget and add it in to the MdiArea.When I call this at first time it is working fine.But if i will call again, it is initializing custom widget but not adding in into the MdiArea. I have mentioned that function here:-
void CArbWaveViewWidget::newFile()
{
m_ptrWavePresenter = new CArbWavePresenter;
QMdiSubWindow *subWindow1 = new QMdiSubWindow;
subWindow1->setWidget(m_ptrWavePresenter->getTableView()); // getting customWidget
qDebug()<<"Table View ==="<<m_ptrWavePresenter->getTableView();
subWindow1->setAttribute(Qt::WA_DeleteOnClose);
QMdiSubWindow *subWindow2 = new QMdiSubWindow;
subWindow2->setWidget(m_ptrWavePresenter->getGraphView()); // getting customWidget
qDebug()<<"Graph View ==="<<m_ptrWavePresenter->getGraphView();
subWindow2->setAttribute(Qt::WA_DeleteOnClose);
mdiArea->addSubWindow(subWindow1);
mdiArea->addSubWindow(subWindow2);
}
How can i solve this problem?
1. Declare your QMdiSubWindow
When you declare a QMdiSubWindow, give mdiArea as argument
QMdiSubWindow *subWindow = new QMdiSubWindow(mdiArea);
or you can use setParent ( QWidget * parent )
QMdiSubWindow *subWindow = new QMdiSubWindow();
subWindow->setParent(mdiArea);
2. Create and add your QWidget in your QMdiSubWindow
QWidget *myWidget = new QWidget();
subWindow->setWidget(myWidget);
3. Update QMdiSubWindow content
If you need to update the subwindow content, declare your QMdiSubWindow as class variable, initialize your QMdiArea and QMdiSubWindow and set QWidget
yourClass.h
class yourClass {
public:
yourClass();
void newFile();
private:
QMdiArea *m_area;
QMdiSubWindow *m_subWindow1, *m_subWindow2;
void init();
};
yourClass.cpp
yourClass::yourClass()
{
init();
}
void yourClass::init()
{
m_area = new QMdiArea();
m_subWindow1 = new QMdiSubWindow(m_area);
m_subWindow2 = new QMdiSubWindow(m_area);
// continue to init your QMdiSubWindow
}
void yourClass::newFile()
{
// Set your QWidget (yourWidget) into your QMdiSubWindow
m_subWindow1->setWidget(yourWidget);
m_subWindow2->setWidget(anotherWidget);
}
You need invoke method "show"
QMdiSubWindow *subWindow = new QMdiSubWindow();
subWindow->setParent(mdiArea);
subWindow->setWidget(yourWidget);
subWindow->show();
I tried to animate a tool button using QPropertyAnimation. However, it did nothing. Is there anything I have done wrong? Can anyone please help?
ToolBarPalettes.h:
class ToolBarPalettes : public QToolBar
{
public:
ToolBarPalettes(void);
~ToolBarPalettes(void);
public slots:
void startAnimation();
private:
createButtons();
QToolButton *animatedButton;
}
ToolBarPalettes.cpp:
ToolBarPalettes::ToolBarPalettes(void)
{
createButtons();
connect(animatedButton, SIGNAL(clicked()), this, SLOT(startAnimation()));
}
void ToolBarPalettes::createButtons()
{
animatedButton = new QToolButton;
animatedButton->setText("Animate!");
addWidget(animatedButton);
}
void ToolBarPalettes::startAnimation()
{
QPropertyAnimation *animation = new QPropertyAnimation(animatedButton, "geometry");
animation->setDuration(3000);
animation->setStartValue(QRect(this->x(), this->y(), this->width(), this->height()));
animation->setEndValue(QRect(this->x(), this->y(), 10, 10));
animation->setEasingCurve::OutBounce);
animation->start(QAbstractAnimation::DeleteWhenStopped);
}
You should use the minimumSize, maximumSize or size properties instead of the geometry property.
animation = new QPropertyAnimation(animatedButton, "minimumSize");
then set the values:
animation->setStartValue(animatedButton->minimumSize());
animation->setEndValue(QSize(100,100));
The geometry property only works for top-level windows and widget's that are not contained in a layout.
I am following this example to create a Flow layout:
http://doc.qt.io/qt-4.8/qt-layouts-flowlayout-example.html
This doesn't have addToIndex(int _index) function, so I would like to implement this. Since this layout uses QLayoutItems, I would like to create a function which can insert an Item after the specific index.
How can I get the index of an Item as integer and insert to the layout?
UPDATE:
flowlayout.cpp
FlowLayout *flowLayout = new FlowLayout;
void FlowLayout::insertItem(int index, QLayoutItem *item)
{
if(itemList.size() < index)
{
itemList.append(item);
}
else
{
itemList.insert(index,item);
QRect tmp = this->geometry();
}
update();
}
flowwindow.cpp
void FlowWindow::addLineBreak()
{
flowbreak = new FlowLayoutButton(NULL);
QLayoutItem *item = new QWidgetItem(flowbreak);
flowlayout->insertItem(index, item);
//flowlayout->addWidget(flowbreak);
}
flowlayoutbutton.cpp constructor
FlowLayoutButton::FlowLayoutButton(QWidget *_parent):QWidget(_parent)
{
QBoxLayout *layout = new QHBoxLayout;
flowbreak = new QPushButton(tr("-------Label-------"));
flowbreak->setGeometry(0, 0, 200,20);
layout->addWidget(flowBreak);
setLayout(layout);
}
add the following method:
flowlayout.h:
class FlowLayout : public QLayout
{
public:
void insertWidget(int index, QWidget *w);
// rest of the class from the example
};
flowlayout.cpp:
// new method
void FlowLayout::insertWidget(int index, QWidget *w) {
addWidget(w);
itemList.move(indexOf(w), index);
}
now you can use it by just calling (assuming you have a pointer to the layout named flowLayout):
flowLayout->insertWidget(2,new QPushButton("Button"));
I am adding three tables dynamically in widget containing table widget and labels, but nothing shows on screen, I have tried to do it with vertical layout but it does not expand if i add a new row, so not scrolling.
Is there any other way to get all three tables on a same page with scrolling.
QScrollArea *m_scrollArea =ui->scrollArea_Stats;
m_scrollArea->setWidgetResizable(true);
QWidget *area = new QWidget;
QVBoxLayout *vlay = new QVBoxLayout(m_scrollArea);
area->setLayout(vlay);
StatsWidget *objStatsWidget;
for(int i=0;i<2;i++)
{
objStatsWidget=new StatsWidget(ui->scrollArea_Stats);
vlay->addWidget(objStatsWidget);
}
m_scrollArea->setWidget(area);
here StatsWidget is my custom widget containing 2 lables at top and a table widget
I am adding three tables dynamically but page is not scrolling, vlay is not showing all tables it is just showing what it can show in a page without scrolling.
try rewrite the code as this:
m_scrollArea->setWidgetResizable(true);
QVBoxLayout *vlay = new QVBoxLayout;
StatsWidget *objStatsWidget;
for(int i=0;i<2;i++)
{
objStatsWidget=new StatsWidget(ui->scrollArea_Stats);
vlay->addWidget(objStatsWidget);
}
QWidget *area = new QWidget(m_scrollArea);
area->setLayout(vlay);
m_scrollArea->setWidget(area);
EDIT: i made something like what you are trying to do some time ago..
so: create a custom QWidget with a QVBoxLayout as member.let's call this object "widgetList". then reimplement all method that you need, as addWidget, takeAt etc.. using your layout as a list
finally set widgetList as widget for your scroll area..
let me know..
I made all this because QWidgetList was not enough easy to use and i needed something else that i have omitted here..
I found my piece of code:
class WidgetList : public QWidget
{
Q_OBJECT
public:
WidgetList(QWidget *parent = 0);
~WidgetList();
void addWidget(QWidget*);
void removeWidget(QWidget*);
QList<QWidget*> getListWidget() const;
QWidget* takeAt(int) const;
int count() const;
private:
QVBoxLayout* layout_;
};
.cpp
WidgetList::WidgetList(QWidget *parent)
: /**/QWidget(parent)
/**/,layout_(new QVBoxLayout(this))
{
this->setLayout(layout_);
}
void WidgetList::removeWidget(QWidget* widget)
{
layout_->removeWidget(widget);
}
void WidgetList::addWidget(QWidget* widget)
{
layout_->addWidget(widget);
}
QWidget* WidgetList::takeAt(int index) const
{
return layout_->takeAt(index)->widget();
}
int WidgetList::count() const
{
return layout_->count();
}
this will be your new Widget with layout where to insert your custom widget..
then i put widgetList as widget of QScrollArea:
QScrollArea* scrollArea = new QScrollArea;
widgetList* list = new widgetList(scrollArea);
scrollArea->setWidget(list);
everything works for me..
EDIT 2: i post my main that works good with my previous code:
QScrollArea* scroll = new QScrollArea;
WidgetList* w = new WidgetList(scroll);
QLabel * label = new QLabel("Label1");
QLabel* label2 = new QLabel("label2");
QTableWidget* table = new QTableWidget(10,10);
w->addWidget(label);
w->addWidget(label2);
w->addWidget(table);
scroll->setWidget(w);
scroll->setWidgetResizable(true);
scroll->show();