Hi.
I understand this question is very similar to these:
Nevertheless, I am trying to show some information (preferably as a text object) while mouse is over a part of an image in a continuous way: meaning that the text will appear if the mouse is over specified pixels and disappear otherwise. I came across using the WindowButtonMotionEvent and listeners instead of WindowButtonMotionFcn, however it is not clear to me how exactly this can be implemented properly.
function pixHover(x,y)Thresh = 40;set(gcf,'WindowButtonMotionFcn', @hoverCallback);axesHdl = axes; function hoverCallback(src, evt) textHdl = text('Color', 'black', 'VerticalAlign', 'Bottom'); mousePoint = get(axesHdl, 'CurrentPoint'); mouseX = mousePoint(1,1); mouseY = mousePoint(1,2); distancesToMouse = hypot(x - mouseX, y - mouseY); [~, ind] = min(abs(distancesToMouse)); xrange = range(get(axesHdl, 'Xlim')); yrange = range(get(axesHdl, 'Ylim')); if abs(mouseX - x(ind)) < Thresh && abs(mouseY - y(ind)) < Thresh set(textHdl, 'String', {['x = ', num2str(x(ind))], ['y = ', num2str(y(ind))]}); set(textHdl, 'Position', [x(ind) + 0.01*xrange, y(ind) + 0.01*yrange]) else set(textHdl, 'String', '') delete(textHdl) end end end
The problem is that after finding the target point (x,y), and displaying the text object it never enter the function again (and therefore, the text persists and cannot be deleted after leaving the target point). I appreciate any help in advance.
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