setfocus.m

实现地震勘探中

function setfocus(h);
%
%  Sample of a simple approach to assign the focus to a uicontrol:
%  "setfocus" forces a mouse click in the upper left corner of the
%  object with handle h.
%  
%        setfocus(h);
% INPUT
% h      handle of object to assign focus to

% $Revision: 1.3 $
% $Date: 2002/06/27 12:41:01 $
% $Author: weber $

if nargin < 1
   error('No input handle defined!')
end

if ~ishandle(h) 
   error('Input must be a handle!');
end

callback='';

% When the object is a 'uicontrol' the function of the object would be 
% executed. Therefore I have to set it to '', and set it back after the mouseclick

if strcmp(get(h, 'Type'), 'uicontrol')
   callback=get(h, 'Callback');
   set(h, 'Callback', '');
   drawnow; % Update the figure data
end

figh=get(h, 'Parent');
unit_root=get(0, 'Unit');
unit_fig=get(figh, 'Unit');
set(0, 'Units', 'pixels');
set(figh, 'Units', 'pixels');
try
   unit_obj=get(h, 'Unit');
   set(h, 'Units', 'pixels');
catch
   disp('In "setfocus": There is no "Unit" property in the "uimenu" class.')
   error('Abnormal termination')
end
drawnow;

% get the current mouse pointer coordinates 
mouse_coord=get(0, 'PointerLocation');
fig_pos=get(figh, 'Position');
obj_pos=get(h, 'Position');

act_pos=fig_pos+obj_pos;
act_pos=act_pos(1:2);
act_pos(1)=act_pos(1)+3;
act_pos(2)=act_pos(2)+obj_pos(4)-7;

% set the mouse pointer to the upper left corner of the object
% (I did this for listboxes, to highlight the first entry)

set(0, 'PointerLocation', act_pos)

mouseclick; %simulate the mouseclick

%-----------------------------------------------------------------------------
% set all parameters that were changed back to the starting values

set(0, 'PointerLocation', mouse_coord);

if strcmp(get(h, 'Type'), 'uicontrol')
    drawnow;   % When there is no 'drawnow', the original Callback- String
               % will be executed, even the Callback String is set to '';
    set(h, 'Callback', callback);
end

set(0, 'Unit', unit_root);
set(figh, 'Unit', unit_fig);
set(h, 'Unit', unit_obj);
drawnow;