我有一个MATLAB GUI：
1）由activex控制的VLC窗口
2）一堆radiobuttons到＆＃34;注释＆＃34;关于特定帧的视频。
我有工作代码，但是我错过了为注释调用的函数的输出。此函数Annotate应将带注释的值替换为先前创建的表final_data。我可以将替换值显示到控制台，我希望guidata更新handles，因此我的main函数的输出应包含带有更新值的.final_data字段。但是，在输出对象上调用.final_data将返回空的占位符值。
function Annotate(varargin)
hFigure = findobj('tag', 'VideoPlay');
handles = guidata(hFigure);
% change value of the orther button to 0
set(handles.hNotAnnotateButton, 'Value', 0);
mypos = handles.vlc.input.Position; % >> proxy to calculate frame
behavior = handles.Behavior; % >>> Tag to be annotated
% Calculate frame
myframe = ceil(handles.vlc.input.Time/1000 * handles.frameRate) - 1;
handles.final_data.behavior(myframe) = behavior;
display(handles.final_data(myframe, :)) % displays properly
guidata(handles.hFigure, handles) % not updating handles??
end
以防万一，这里有完整的功能
function handles = AnnotateVideo(filepath)
% Get some initial data from the video
filepath = fullfile(filepath);
% Get file duration
v = VideoReader(filepath);
handles.duration = v.Duration;
handles.frameRate = v.FrameRate;
delete(v)
total_frames = ceil(handles.duration * handles.frameRate) - 1;
%% Make some variables
handles.final_data.frameID = (1:total_frames)';
handles.final_data.behavior = strings(total_frames, 1);
% change format to table
handles.final_data = struct2table(handles.final_data);
% Place Holder for behavior
%% Build the Figure/GUI
% Video will be kept on handle
handles.filepath = filepath;
% Create figure to receive activex
handles.hFigure = figure('position', [50 50 1300 560], ...
'menubar', 'none', 'numbertitle', 'off', ...
'name', ['Video: ' filepath],...
'tag', 'VideoPlay', 'resize', 'on');
% Create play/pause and seek to 0 button
handles.hTogglePlayButton = uicontrol(handles.hFigure, ...
'position', [0 540 80 21], ...
'string', 'play/pause', 'callback',...
@TogglePlayPause);
handles.hSeekToZeroButton = uicontrol(handles.hFigure, ...
'position', [81 540 80 21], ...
'string', 'begining', 'callback',...
@SeekToZero);
handles.hGoToStartFrameButton = uicontrol(handles.hFigure, ...
'position', [161 540 80 21], ...
'string', 'StartFrame', 'callback',...
@SeekToStartFrame);
handles.hGoToEndFrameButton = uicontrol(handles.hFigure, ...
'position', [241 540 80 21], ...
'string', 'EndFrame', 'callback',...
@SeekToEndFrame);
%% Annotate button
handles.hAnnotateButton = uicontrol(handles.hFigure, ...
'Style', 'radiobutton', ...
'position', [980 320 100 41], ...
'String', 'Annotate', 'callback',...
@Annotate);
handles.hNotAnnotateButton = uicontrol(handles.hFigure, ...
'Style', 'radiobutton', ...
'position', [1100 320 100 41], ...
'String', 'Not-Annotate', ...
'Value', 1, ...
'callback', @NotAnnotate);
%% Make radio buttons for ethogram
handles.radio(1) = uicontrol('Style', 'radiobutton', ...
'Callback', @myRadio, ...
'Units', 'pixels', ...
'Position', [980, 500, 80, 22], ...
'String', 'Non-specific', ...
'Value', 0);
handles.radio(2) = uicontrol('Style', 'radiobutton', ...
'Callback', @myRadio, ...
'Units', 'pixels', ...
'Position', [980, 480, 80, 22], ...
'String', 'Rearing', ...
'Value', 0);
handles.radio(3) = uicontrol('Style', 'radiobutton', ...
'Callback', @myRadio, ...
'Units', 'pixels', ...
'Position', [980, 460, 80, 22], ...
'String', 'Snif', ...
'Value', 0);
handles.radio(4) = uicontrol('Style', 'radiobutton', ...
'Callback', @myRadio, ...
'Units', 'pixels', ...
'Position', [980, 440, 80, 22], ...
'String', 'Retrieving', ...
'Value', 0);
handles.radio(5) = uicontrol('Style', 'radiobutton', ...
'Callback', @myRadio, ...
'Units', 'pixels', ...
'Position', [1100, 500, 80, 22], ...
'String', 'Self-Groom', ...
'Value', 0);
%% Activex control for VLC player
% Create activex control
handles.vlc = actxcontrol('VideoLAN.VLCPlugin.2', [0 0 960 540], handles.hFigure);
% Format filepath so that VLC can use it
% Read into vlc
filepath = ['file://localhost/' filepath];
% Add file to playlist
handles.vlc.playlist.add(filepath);
% Play file
handles.vlc.playlist.play();
% Deinterlace
handles.vlc.video.deinterlace.enable('x');
% Go back to begining of file
handles.vlc.input.time = 0;
% Register an event to trigger when video is being played regularly
handles.vlc.registerevent({'MediaPlayerTimeChanged', @MediaPlayerTimeChanged});
% Position changed
handles.vlc.registerevent({'MediaPlayerPositionChanged', @MediaPlayerPositionChanged});
% Save handles
guidata(handles.hFigure, handles);
%% Helper functions and button callbacks
function MediaPlayerPositionChanged(varargin)
hFigure = findobj('tag', 'VideoPlay');
handles = guidata(hFigure);
% Get position
handles.mypos = handles.vlc.input.Position;
% Get frame
handles.myframe = handles.vlc.input.Time;
% If position is changing AND annotate button is 'ON' (value == 1)
% Annotate
will_annotate = get(handles.hAnnotateButton, 'Value');
if(will_annotate)
Annotate
end
end
%% Display running time in application title
function MediaPlayerTimeChanged(varargin)
hFigure = findobj('tag', 'VideoPlay');
handles = guidata(hFigure);
myframe = handles.vlc.input.Time;
set(hFigure, 'name', [handles.filepath ' ; ' num2str(myframe/1000) ' sec.']);
end
%% Annotate: MAIN 'Looping' Function
% called when position is changed and annotate button
function Annotate(varargin)
hFigure = findobj('tag', 'VideoPlay');
handles = guidata(hFigure);
% change value of the orther button to 0
set(handles.hNotAnnotateButton, 'Value', 0);
mypos = handles.vlc.input.Position;
behavior = handles.Behavior;
% Calculate frame
myframe = ceil(handles.vlc.input.Time/1000 * handles.frameRate) - 1;
handles.final_data.behavior(myframe) = behavior;
display(handles.final_data(myframe, :))
guidata(handles.hFigure, handles)
end
%% Not annotate, basic placeholder to not annotate
function NotAnnotate(varargin)
hFigure = findobj('tag', 'VideoPlay');
handles = guidata(hFigure);
% change value of the orther button to 0
set(handles.hAnnotateButton, 'Value', 0);
end
function TogglePlayPause(varargin)
% Toggle Play/Pause
hFigure = findobj('tag', 'VideoPlay');
handles = guidata(hFigure);
handles.vlc.playlist.togglePause();
end
function SeekToZero(varargin)
% Seek to begining of file
hFigure = findobj('tag', 'VideoPlay');
handles = guidata(hFigure);
handles.vlc.input.Time = 0;
end
function SeekToStartFrame(varargin)
% Seek StartFrame of file
hFigure = findobj('tag', 'VideoPlay');
handles = guidata(hFigure);
handles.vlc.input.Time = StartFrame;
end
function SeekToEndFrame(varargin)
% Seek to EndFrame of file
hFigure = findobj('tag', 'VideoPlay');
handles = guidata(hFigure);
handles.vlc.input.Time = EndFrame;
end
function myRadio(RadioH, EventData)
handles = guidata(RadioH);
otherRadio = handles.radio(handles.radio ~= RadioH);
set(otherRadio, 'Value', 0);
set(handles.hAnnotateButton, 'Value', 0);
handles.Behavior = RadioH.String;
sprintf('Switching to...%s', handles.Behavior)
guidata(handles.hFigure, handles)
end
% End of global function
end
答案 0 :(得分：0)
这是更新和答案的混合。我探索了两个选项。首先是保持原样，但在运行global outputdata之前从控制台运行GUI并将事情放在那里。第二种方法类似，但我将所有函数都发布到单独的.m文件中。我有Annotate来调用assignin('base', 'outputdata', outputdata)而不是全局。这是令人讨厌的，我不完全喜欢它，但它部分地完成了工作。我欢迎任何改善它的建议。
答案 1 :(得分：0)
这是因为输出变量永远不会使用新的guidata更新...
使用以下程序运行程序：
handles = AnnotateVideo(<filepath>)
您可以使用（从命令行）更新结构句柄：
handles = guidata(handles.hFigure);
答案 2 :(得分：0)
drawnow更新数据并处理所有挂起的回调。如果您修改图形对象并希望立即在屏幕上查看更新，请使用此命令。
Sub Archive_2()
Range("A2").Select
Selection.Copy
Sheets("Campaign Rate").Select
Range("A3").Select
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
:=False, Transpose:=False
End Sub