QGLWidget mouse movement tracking
-
ok thanks. i assume QT mousePressEvent or mousemoveevent function can be used in QTopenGLwidget class.
also using mouseevent, if i click the button, how do i display the x,y at the pointer of my mouse.
is there mouseClickEvent?
Hi
yes, QOpenGLWidget is also a QWidget and offer same virtual functions to override.
mouseClickEvent = mousePressEvent.- also using mouseevent, if i click the button, how do i display the x,y at the pointer of my mouse.
Do you mean the mouse position over the button
or do you mean the global mouse position at that moment ?
Note there is also
QPoint globalCursorPos = QCursor::pos();
to ask where mouse is in global coordinates.
You can call that from any function and no need for subclassing.
In mousePress, the pos you get there is translated to the local coordinates system.
Very useful if you want to draw on the widget etc.So it really depends on what you really want to archive ?
-
Hi
yes, QOpenGLWidget is also a QWidget and offer same virtual functions to override.
mouseClickEvent = mousePressEvent.- also using mouseevent, if i click the button, how do i display the x,y at the pointer of my mouse.
Do you mean the mouse position over the button
or do you mean the global mouse position at that moment ?
Note there is also
QPoint globalCursorPos = QCursor::pos();
to ask where mouse is in global coordinates.
You can call that from any function and no need for subclassing.
In mousePress, the pos you get there is translated to the local coordinates system.
Very useful if you want to draw on the widget etc.So it really depends on what you really want to archive ?
-
hi i like to display text of X,Y coordinate when my mouse is clicked within the GUI.
for example if my mouse arrow position currently is x=5, y=6. i like to settext so it dispaly 5,6 at coordinate 5,6.
such as
-
@mrjj
yes i got that but do i use qlabel, setText and setposition and setfont to display the coordinate or there are better way to do it.@s002wjh
Hi
It really depends on what you already have.
If you draw the graphs looking thing in the image, you could also just
store the values in variables and draw it as part of the graphs.
Else a Label is not super bad but might not be optimal if you say resize the window etc as
the labels stay in same position. -
@s002wjh
Hi
It really depends on what you already have.
If you draw the graphs looking thing in the image, you could also just
store the values in variables and draw it as part of the graphs.
Else a Label is not super bad but might not be optimal if you say resize the window etc as
the labels stay in same position. -
@mrjj
so i do have the location of mouse stored using mouseevent, but not sure best way to draw that text since its QGLwidget.
so maybe something like Qpainter drawtext?Hi
yeah something like
https://het.as.utexas.edu/HET/Software/html/opengl-overpainting.htmlBut i do wonder. how do you draw that graph look ? is that openGL?
-
Hi
yeah something like
https://het.as.utexas.edu/HET/Software/html/opengl-overpainting.htmlBut i do wonder. how do you draw that graph look ? is that openGL?
-
@mrjj
yes its openGL stuff, i didn't wrote the code, all the stuff i done is use the qpainter. so not sure even qpainter would work.
