Mouse Button Press distinction

Question

Khalid Mahmood 2021-4-15

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/803061-mouse-button-press-distinction

回答： Jixiong Su 2023-11-1

SelectionType property of figure tells which mouse button was pressed along with modifier (ctrl or shift).

Normal: Left Mouse Button.

extend: i) Shift+LeftMouseButton OR ii) Middle Mouse Button OR iii) Both Left and Right Buttons

alt: i) CTRL+LeftMouseButton OR ii) Right Mouse button

open: Double Click Any Mouse Button.

1: Why CTRL+LeftMouseButton and CTRL+RightMouseButton return same code in mouse events? Its only in Matlab.

2: I want to distinguish between CTRL+LeftMouseButton and CTRL+RightMouseButton. How to do this?

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Khalid Mahmood 2021-4-15

I used WindowKeyPressFcn and WindowKeyRelease fcn in parallel to WindowButtonDownFcn and I am able to distinguish all combinations of modifiers and mouse buttons.

In WindowKeyPressFcn(src,evt) I just set a flag (ModifierPresent=true) and ModifierName=evt.Key.

In WindowKeyReleaseFcn(src,evt) I just set a flag (ModifierPresent=false) and ModifierName=' '.

In WindowButtonDownFcn I query(src,'SelectionType') and check if(ModifierPresent) then ModifierName tells which modifier is used...

Is there any simple way?

Khalid Mahmood 2021-4-17

编辑：Khalid Mahmood 2021-4-19

testMouseClicks.m

Ooooch,

I forgot that my pupose was to distinguish between CTRL+LeftClick and CTRL+RightClick. Which still remains the issue
I was able to use evt.Key for Keyboard keys and Modifiers (evt.Modifier) using WindowKeyPress/Release functions, which can't be done using WindowButtonDown/Up functions for all keys

Can anybody help me to distinguish between CTRL+Left Mouse Button Click and Ctrl+ Right Mouse Button Click. My code is attached

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Answer 1

Sufia Tanveer 2021-4-19

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/803061-mouse-button-press-distinction#answer_678426

I have tested your code. Your code is great work. Matlab developers have somehow missed that distinction of modifier + right mouse button. I have searched help and found you are 💯% correct. What I can say is, it may have not been rectified by developers. That's why nobody else has given you answer.

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Khalid Mahmood 2021-4-19

I accept your answer, but I am waiting for some senior programmer or matlab staff members to answer to be precise

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Answer 2

Jixiong Su 2023-11-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/803061-mouse-button-press-distinction#answer_1344671

在 MATLAB Online 中打开

distinguish between Ctrl+click and click

fig = uifigure();
Error using matlab.internal.lang.capability.Capability.require
This functionality is not available on remote platforms.

Error in matlab.ui.internal.uifigureImpl (line 32)
  Capability.require(Capability.WebWindow); 

Error in uifigure (line 34)
window = matlab.ui.internal.uifigureImpl(varargin{:});
fig.WindowButtonDownFcn = @figureClickCallback;
fig.KeyPressFcn = @figureKeyPressCallback;
fig.KeyReleaseFcn = @figureKeyReleaseCallback;
fig.UserData.CtrlPressed = false;
function figureClickCallback(src, ~)
   
    if  strcmp(src.SelectionType, 'alt') && src.UserData.CtrlPressed
        % Ctrl + Left Click
        disp('Ctrl + Left Click');
    elseif  strcmp(src.SelectionType, 'normal')
        % Left Click
        disp('Left Click');
        % Right Click
    elseif  strcmp(src.SelectionType, 'alt')
        disp('Right Click');
    end
end
function figureKeyPressCallback(src, event)
    if strcmp(event.Key, 'control')
        src.UserData.CtrlPressed = true;
    end
end
function figureKeyReleaseCallback(src, event)
    if strcmp(event.Key, 'control')
        src.UserData.CtrlPressed = false;
    end
end