matlab 判断鼠标按下_MATLAB如何获取鼠标点击坐标

I have made my GUI using GUIDE. I have an axes (tag=axes1). An image is displayed in the axes.

When i click on the image(inside axes) I need to get the coordinates.

I get the coordinate values when image is not added to axes.But image is displayed in axes do no obtain the axes. How to get the coordinates?

解决方案

Let's assume that you've plotted the image with handle imageHandle that:

imageHandle = imshow(imageObj);

You should assign the ButtonDownFcn to the image handle not the axes handle that:

set(imageHandle,'ButtonDownFcn',@ImageClickCallback);

and get the mouse coordinates from this function as follows:

function ImageClickCallback ( objectHandle , eventData )

axesHandle = get(objectHandle,'Parent');

coordinates = get(axesHandle,'CurrentPoint');

coordinates = coordinates(1,1:2);

%// then here you can use coordinates as you want ...

end

You can try this small demo to check my answer:

function demoOnImageClick

clc;clear;

imObj = rand(500,500);

figure;

hAxes = axes();

imageHandle = imshow(imObj);

set(imageHandle,'ButtonDownFcn',@ImageClickCallback);

function ImageClickCallback ( objectHandle , eventData )

axesHandle = get(objectHandle,'Parent');

coordinates = get(axesHandle,'CurrentPoint');

coordinates = coordinates(1,1:2);

message = sprintf('x: %.1f , y: %.1f',coordinates (1) ,coordinates (2));

helpdlg(message);

end

end