Get Control under cursor - c++

Question

I`m try to get control under cursor. At my example i can get only red rectangle, but i need get other also.
import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Window 2.2
import QtQuick.Dialogs 1.2
ApplicationWindow {
id: mainWindow
title: qsTr("Hello World")
width: 640
height: 480
Item {
id: parentPanel
anchors.fill: parent
MouseArea {
anchors.fill: parent
hoverEnabled: true
onMouseXChanged: moveMouse()
onMouseYChanged: moveMouse()
function moveMouse()
{
currentControl.text = parentPanel.childAt(mouseX, mouseY).color ? parentPanel.childAt(mouseX, mouseY).color : "not colored"
}
}
Rectangle {
id: redRect
anchors {
fill: parent
leftMargin: 50
bottomMargin: 50
}
color: "red"
Rectangle {
id: yellowRect
anchors {
fill: parent
leftMargin: 50
bottomMargin: 50
}
color: "yellow"
Rectangle {
id: greenRect
anchors {
fill: parent
leftMargin: 50
bottomMargin: 50
}
color: "green"
}
}
}
Text {
id: currentControl
anchors.left: parent.left
anchors.bottom: parent.bottom
}
}
}
I have screenshot from running program. Green rect inside yellow, yellow inside red. I need get control ref when mouse cursor over control.

Answer 1

I'm not familiar with QML, so I don't know the exact syntax for this, but it seems like you want to loop until you find the inner-most control and get the color of that. Here's some C++ish pseudo-code
auto control = parentPanel.childAt(mouseX, mouseY);
while (control)
{
currentControl.text = control.color ? control.color : "not colored";
control = control.childAt(mouseX, mouseY);
}
Of course, this code assumes that the X and Y passed are absolute, not relative. If the are relative, you would need to decrement them by the location of control in each consecutive loop.