How to update mouse position when button is pressed in gui.

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Brian
Brian 2017-8-7
回答： Brian 2017-8-11
I'm trying to write a function for a gui, pretty much my own zoom function. I have most of it worked out aside from bounding it to the axis. I start it with an if so that it will only run when the mouse clicks inside the axis. The only problem is that when I press a button or checkbox, the mouse position isn't updated, so it senses the click but thinks that the mouse coordinates are inside the axis and it runs the function again. How can I fix this so that the function will only be run when I click inside the axis.
  2 个评论
Adam
Adam 2017-8-7
If you are using the 'CurrentPoint' property of the axes then this should return a value that is outside of the axes limits if the mouse is not on the axes when pressed.
Brian
Brian 2017-8-7
I'm using the CurrentPoint property of the figure and comparing it to the position of the axes in the figure. I've tried using the CurrentPoint property of the axes, but I still have the same problem. If I click one of the checkboxes or a button, it calls the function because I clicked, but it doesn't update the CurrentPoint, instead, it returns the last value it found.

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回答（4 个）

Walter Roberson
Walter Roberson 2017-8-7
You might be able to take advantage of overobj()
https://www.mathworks.com/matlabcentral/newsreader/view_thread/171483
Akhilesh Thakur
Akhilesh Thakur 2017-8-8
编辑：Adam 2017-8-9
Yes this problem happens it wont be updated as you are going through the callbacks of the button. The solution to this problem is update your mouse position in the callbacks itself. Also if you want to refer how to retreive the positions manually go through these links https://www.mathworks.com/matlabcentral/answers/142488-matlab-get-function-and-detecting-user-mouse-click https://www.mathworks.com/matlabcentral/newsreader/view_thread/22261
Hope this helps
Jan
Jan 2017-8-9
You can try to determine the mouse position by Java:
MouseInfo = java.awt.MouseInfo.getPointerInfo();
Pos = MouseInfo.getLocation();
x = int32(Pos.getX());
y = int32(Pos.getY());
This is in screen coordinates and the conversion to the coordinates of the axes is not trivial. But the problems to identify the clicks on the uicontrol's reveals a general problem with your approach: It seems to be a design mistake, that the zoom function reacts to clicks on buttons. Either zooming is triggered by the ButtonDownFcn of the axes only, or it is unintuitive, because the user cannot know, which parts of the figure are allowed to start the zooming. Think twice if your current approach (using the WindowsButtonDownFcn ?) is really the direct solution of the job.
Brian
Brian 2017-8-11
I figured out a good way to do it. I used 'gco' to get the handles of the object being called and used that to ignore clicks coming from any other objects.

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