MATLAB: [Gui] Plot “area” not corresponding to an image

guiimageimagescplot

I am developing an interface to visualize 3D images. In this way, the user can select the "slice" (sagittal, coronal or transverse) and progress in volume in changing slice's "index".
I used a slider to change slice's index and also used the callback WindowScrollWheelFcn. For this second process, I used the CurrentPoint on my image plot handle to test if mouse is over the image…. and the problem is here ! …
Take exemple with a data's dimension as 256x256x180. When I plot the 2D slice's image, using imagesc, with a no-square dimension like 256×180, the image is correctly plotted, BUT, it wiil appear my plot "area" as dimension 180×256. This difference between image area and plot area is detected using the WindowScrollWheelFcn and priting the mouse position.
This problem makes that a part of image is not considered inside the image, but a part next to the image it's like inside the image (detected by WindowScrollWheelFcn).
Here some pieces of code:
        %%extract 2D image form 3D volume
        function update_image(self)            
            self.image = [];            
            if (isempty(self.data) || self.index <= 0)
                return;
            end            
            [w, h, d] = size(self.data);            
            switch self.slice
                case 1
                    idx = min(self.index, w);
                    self.image = flipud(squeeze(self.data(idx , : , :))');
                case 2
                    idx = min(self.index, h);
                    self.image = flipud(squeeze(self.data(: , idx , :))');
                case 3
                    idx = min(self.index, d);
                    self.image = squeeze(self.data(: , : , idx));
            end       
        end
        %%update plot with image 2D
        function update_viewer(self)                                    
            if (isempty(self.image))
                return; 
            end
            axes(self.gui_axes);            
            old_w = 0; 
            old_h = 0;
            if (~isempty(self.image_h))
                [old_w, old_h] = size(get(self.image_h, 'CData'));
            end
            [new_w, new_h] = size(self.image);            
            if (old_w ~= new_w || old_h ~= new_h)
                self.image_h = imagesc(self.image, self.clims);
                colormap gray;
                axis off;
                axis image;
                title(self.gui_title);
            else
                set(self.image_h, 'CData', self.image);
            end      
        end
And to get the mouse position :
        function [position] = getMousePosition(self)
            p = get(self.gui_axes, 'CurrentPoint');
            position = p(1, 1:2);
        end
Thanks advence for your help

Best Answer

hhhmmm .. it seems that it was as "simple" like that.
So I change :
        function [position] = getMousePosition(self)
            p = get(self.gui_axes, 'CurrentPoint');
            position = p(1, 2:-1:1);
        end
Thanks Adam for your help !
I continue somes tests, I'll be back if seems error persits.
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