Draw a draggble rectangle (fill with color) on a subplot to change the values in another subplot.

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Armindo 2016-3-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/272363-draw-a-draggble-rectangle-fill-with-color-on-a-subplot-to-change-the-values-in-another-subplot

编辑： Adam 2016-3-10

Hi I am trying to draw a rectangle that can be dragable (between the XLim of the subplot). When dragged some update is made in another subplot based on the x limits imposed by the position of the rectangle.

What I have done:

h = findobj(ax, 'Type', 'line' );                                          % get the handle of get the x data from subplot
xp=get(h,'xData');                                                         % get subplot xData
yp = get(ax,'ylim');                                                       % get subplot y limit
vert = [xp(1), yp(1);xp(1), yp(2);xp(100), yp(2);xp(100), yp(1)];          % create vertex coordinates
transparency = 0.5; facecolor =[ 0.3765  0.3765   0.3765 ];                % light grey
edgecolor = [0 0 0]; tcolor(1,1,1:3) = facecolor;                          % color
fac = [1 2 3 4];                                                           % connect points to make square
dat.hPatch = patch('parent',ax,'Faces',fac,'Vertices',vert,'FaceColor',tcolor,'FaceAlpha',transparency,'edgecolor',edgecolor,'Visible','on', 'tag', 'hPatch');
1) This is the better approach?
2) If I maximise or minimize the image the subplots don't update properly (for instance one subplot shrink and another not) how force them to update?
3) How to make the rectangle move smoothly when dragged by the mouse?