QML / QWidget & Window icons
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Hi everyone,
I'm looking for the QML equivalent of
QWidget::SetWindowIconand I seem unable to find it in the docu:Theres the
titleproperty but, one for the icon seems to be missing.I can set an Icon by calling
QApplication::setWindowIcon(); inside the main.cpp
but, thats global and can't be changed, once exec() is called.My last Idea(untested so far) would be, to move from
QQmlApplicationEngineto a QQuickView, because that one has a setIcon function, but I would rather not go the way over QWidgets.
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Hi,
This interest mailing list thread might be of use.
It looks like the Window type is missing some APIs.
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What I would do:
Create an attached type for the window with an icon property, effectively calling
QWindow::setIcon.
Usage would be like this:ApplicationWindow { // ... WindowHelper.icon: "qrc:/windowIconFile" // ... }reference: http://doc.qt.io/qt-5/qtqml-cppintegration-definetypes.html#providing-attached-properties
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Thanks @SGaist and @GrecKo for your input on this issue.
I ended up following the tip I found in the mailing list conversation SGaist posted.
A QML Window is a QQuickWindow which is a subclass of QWindow, so the method you would want to call is QWindow::setIcon(QIcon &). Maybe you can create a subclass of QQuickWindow in C++ ...this is also basicaly what GrecKo suggested, I think.
The fix was surprisingly easy, and I'm surpised that this hasn't been added to the official release yet, the Mailinglist conversation was on
Jan 29, 2013!the Custom QQuickWindow#ifndef QUICKWINDOW_H #define QUICKWINDOW_H #include <QQuickWindow> #include <QIcon> class QuickWindow : public QQuickWindow { Q_OBJECT Q_PROPERTY(QString windowIcon READ windowIcon WRITE setWindowIcon NOTIFY windowIconChanged) public: explicit QuickWindow(QQuickWindow *parent = nullptr) : QQuickWindow(parent) {} const inline QString &windowIcon(){return str;} inline void setWindowIcon(const QString &str){ if(str != m_str){ m_str = str; setIcon(QIcon(m_str)); emit windowIconChanged(); } } signals: void windowIconChanged(); private: QString m_str; }; #endif // QUICKWINDOW_Hmain.cpp
#include "quickwindow.h" int main(int argc, char *argv[]){ .... qmlRegisterType<QuickWindow>("QuickWindow",1,0, "QuickWindow"); QQmlApplicationEngine engine; engine.load(QUrl(QStringLiteral("qrc:/main.qml"))); .... }main.qml
import QuickWindow 1.0 QuickWindow{ .... title: qsTr("MyApp") windowIcon: ":/Path/to/image.png" .... }and done.
Thanks for the help guys.
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@J.Hilk said in QML / QWidget & Window icons:
const inline QString &windowIcon(){return str;}
Hi J.Hilk,
I just wonder that your solution work..
I got a "str was not declared in this scope forconst inline QString &windowIcon(){return str;}May you can give your code a try with the recend Qt-Version and QtCreator 4.9.0?
Kind regards,
J-I W.
Here for reference my system environment:
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hi @nightshift and welcome
that must have been a copy and past error on my side, aswindowIcon()should return the member variablem_str
can't believe, I missed that x)
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This must be a typo.
return m_strwill work.Note that by using
QQuickWindowas a base class, you will lose some of the functionnality of QMLWindow, and even more ofApplicationWindow.That's why I suggested using an attached object so that it could attach to any arbitrary window without having to subclass one.
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@J.Hilk thanks you for the quick answer. :)
It's just the simple things which break the biggest inventions.
@GrecKo:
Thanks for the Note, if I'am a pure Newbie and currently stumbling around Qt and C++, I don't think it will make a big issue for me, losing some funcionality. :DHave all a nice day!
