How to save in a drag and drop

Question

axel rose 2020-12-26

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/702787-how-to-save-in-a-drag-and-drop

回答： Jan 2020-12-30

function drag_drop
dragging = [];
orPos = [];
f = figure('WindowButtonUpFcn',@dropObject,'units','normalized','WindowButtonMotionFcn',@moveObject);
tmp =  text(0.35,0.35,'Room','VerticalAlignment','bottom');
a = rectangle('position',[0.35, 0.35, 0.35, 0.35],'FaceColor','w','ButtonDownFcn',@dragObject,'UserData',tmp);
tmp =  text(0.1,0.1,'StudyTable','VerticalAlignment','bottom');
b = rectangle('position',[0.1, 0.1, 0.1, 0.1],'FaceColor','y','ButtonDownFcn',@dragObject,'UserData',tmp);
tmp =  text(0.1,0.1,'CoffeeTable','VerticalAlignment','bottom');
c = rectangle('position',[0.1, 0.1, 0.1, 0.1],'FaceColor','y','ButtonDownFcn',@dragObject,'UserData',tmp);
set(gca,'XLim',[0,1],'YLim',[0,1])
	function dragObject(hObject,eventdata)
		dragging = hObject;
		orPos = get(gcf,'CurrentPoint');
	end
	function dropObject(hObject,eventdata)
		if ~isempty(dragging)
			newPos = get(gcf,'CurrentPoint');
			posDiff = newPos - orPos;
			
			rectpos = get(dragging,'Position') + [posDiff(1:2) 0 0];
			set(dragging,'Position',rectpos);
			set(dragging.UserData,'Position',rectpos(1:3));
			dragging = [];
		end
	end
	function moveObject(hObject,eventdata)
		if ~isempty(dragging)
			newPos = get(gcf,'CurrentPoint');
			posDiff = newPos - orPos;
			orPos = newPos;
			
			rectpos = get(dragging,'Position') + [posDiff(1:2) 0 0];
			set(dragging,'Position',rectpos);
			set(dragging.UserData,'Position',rectpos(1:3));
		end
	end
end

The code above is a drag and drop. Im able to move the items around in the space but i cannot save it. Therefore, if i run it again, the items will go back to their original positions regardless of what position i dragged it to . How do i make the drag and drop savable so that when i run it again it will go back to how i previously left the items in matlab.

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Answer 1

Jan 2020-12-30

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/702787-how-to-save-in-a-drag-and-drop#answer_586973

在 MATLAB Online 中打开

There are some problems with the movement: The object does not move exactly as the mouse.

But you are asking for saving the positions. You can either save the figure by the savefig command. Or create an own save function, which store the positions of the objects. Then loading the file does restore the positions instead of creating new objects.

function drag_drop(Command)
switch Commad
    case 'create'
        ... your code comes here
    case 'save'
        savefig(f, fullfile(tempdir, 'myDragDropFigure.fig'));
        delete(f);
    case 'load'
        f = openfig(fullfile(tempdir, 'myDragDropFigure.fig'));
end