Changing width and height

[A Former User]

Hello,

i just started learning QML and i have a really simple problem: i want to change the size of my main window with my cpp code and i just does not work :(

Here is a little example:
@
import QtQuick 2.0

Rectangle {
width: 360
height: 360
color: "white"

Rectangle {
    x: 200
    y: 203
    width: 96
    height: 92
    color: "yellow"
    objectName: "objectName"
}

}
@

@
#include <QtGui/QGuiApplication>
#include "qtquick2applicationviewer.h"
#include "qqmlengine.h"
#include "qqmlcomponent.h"
#include "qquickitem.h"

int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);

QtQuick2ApplicationViewer viewer;
viewer.setMainQmlFile(QStringLiteral("qml/Test/main.qml"));

QQuickItem *object = viewer.rootObject();
QQuickItem *rect = object->findChild<QQuickItem*>("objectName");

object->setProperty("width", 20);
object->setProperty("height", 20);
object->setProperty("color", "black");

rect->setProperty("width", 10);
rect->setProperty("height", 10);

viewer.showExpanded();

return app.exec();

}
@

Those two lines just don't do anything:
@
object->setProperty("width", 20);
object->setProperty("height", 20);
@

Changing the color of object works. Changing width and height of rect also works. The only thing that does not work is changing the size of object and i cant figure out why. Changing width and height in my QML code also works.

Can anyone please tell me how i can change this size?? Thanks! :)

[A Former User]

Hi, you can try changing the size of the QtQuick2ApplicationViewer itself instead of the root object:
@
viewer.setWidth(100);
viewer.setHeight(100);
@
that might also change the size of the root object I think. Maybe try it yourself :)

[A Former User]

Works! Thank you :)