user-interface - Matlab GUI 给出的 fatal error

Question

已编辑帖子

这些是我使用您的模板创建的新函数来帮助我。发生的事情是，虽然代码工作正常，但“检查光标”框并未超出轴的顶部。事实上，它们相距甚远。我将 disp(axPos) 与 set(hAx, 'Units','pixels') 一起使用过一次，然后将其注释掉。它显示:

1.

 169.0000   71.0000  126.0000   51.0000
 94.0000  122.0000  126.0000   51.0000
 19.0000   71.0000  126.0000   51.0000
 94.0000   20.0000  126.0000   51.0000

这是轴的 GUIDE 坐标，但不是为“当前点”显示的坐标

2.

33.6000    5.3846   25.2000    3.9231
18.6000    9.3077   25.2000    3.9231
3.6000    5.3846   25.2000    3.9231
18.6000    1.4615   25.2000    3.9231

我不知道这些来自哪里，但更接近它们需要的位置，但在左侧约 60 像素。

代码如下:

function HVACSM_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to HVACSM (see VARARGIN)

% Choose default command line output for HVACSM
handles.output = hObject;
NUM = 4;

imgOff1 = imread('cond.png');
imgOn1 = imread('condH.png');

imgOff2 = imread('comp.png');
imgOn2 = imread('compH.png');

imgOff3 = imread('evap.png');
imgOn3 = imread('evapH.png');

imgOff4 = imread('exp.png');
imgOn4 = imread('expH.png');

imgOff = cell(1,NUM);
imgOff{1} = imgOff1;
imgOff{2} = imgOff2;
imgOff{3} = imgOff3;
imgOff{4} = imgOff4;

imgOn = cell(1,NUM);
imgOn{1} = imgOn1;
imgOn{2} = imgOn2;
imgOn{3} = imgOn3;
imgOn{4} = imgOn4;

%# setup axes
hAx = zeros(1,NUM);
hImg = zeros(1,NUM);
hAx = [handles.axes1 handles.axes2 handles.axes3 handles.axes4];
hImg(1) = imagesc(imgOff{1}, 'Parent',hAx(1));
hImg(2) = imagesc(imgOff{2}, 'Parent',hAx(2));
hImg(3) = imagesc(imgOff{3}, 'Parent',hAx(3));
hImg(4) = imagesc(imgOff{4}, 'Parent',hAx(4));
set(hAx, 'XTick',[], 'YTick',[],'Box', 'on')

%# get corner-points of each axis
set(hAx, 'Units','pixels')
axPos = cell2mat( get(hAx,'Position') );
disp(axPos)
p = zeros(5,2,NUM);
for k=1:NUM
    p(:,:,k) = bsxfun(@plus, axPos(k,1:2), ...
        [0 0; axPos(k,3) 0; axPos(k,3:4); 0 axPos(k,4); 0 0]);
end
handles.p = p;
handles.hAx = hAx;
handles.hImg = hImg;
handles.imgOff = imgOff;
handles.imgOn = imgOn;
% Update handles structure
guidata(hObject, handles);



function figure1_WindowButtonMotionFcn(hObject, eventdata, handles)
% hObject    handle to figure1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

pos = get(hObject,'CurrentPoint');%CurrentPoint
posx = pos(1); posy = pos(2);

%Display to check to see if the position is working
posx = num2str(posx);
posy = num2str(posy);

set(handles.Xpos,'String',posx);
set(handles.Ypos,'String',posy);

p = handles.p;
hImg = handles.hImg;
hAx = handles.hAx;
imgOff = handles.imgOff;
imgOn = handles.imgOn;


%# for each axis, determine if we are inside it
    for i=1:numel(hImg)
        if inpolygon(pos(1),pos(2), p(:,1,i),p(:,2,i))
            set(hImg(i), 'CData',imgOn{i})
            set(hAx(i), 'LineWidth',3, 'XColor','r', 'YColor','r')
        else
            set(hImg(i), 'CData',imgOff{i})
            set(hAx(i), 'LineWidth',1, 'XColor','k', 'YColor','k')
        end
    end

这些是带有原始代码“set(hAx, 'Units','pixels')”的命中框

注意*其他人远离屏幕右上角，或者可能会。

这些是带有更改代码“set(hAx, 'Units','characters')”的命中框

注意* 这与代码被注释掉时发生的事情完全相同。

8 月 2 日测试.

.

.

.

附录 原帖

我在运行我的 GUI 后收到此错误 [ fatal error ]:-1:-1: 文件过早结束。

它发生在这段代码中:

function figure1_WindowButtonMotionFcn(hObject, eventdata, handles)

% hObject handle to figure1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

pos = get(hObject,'CurrentPoint');

%CurrentPoint

posx = pos(1); posy = pos(2);

%Display to check to see if the position is working

posx = num2str(posx); posy = num2str(posy);

 set(handles.Xpos,'String',posx); set(handles.Ypos,'String',posy);

%If mouse over then update the immage

if ((115 < pos(1)) && (pos(1) < 125) && (7 < pos(2)) && (pos(2) < 11))
axes(handles.axes1);
imshow('condH.png')  
else 
 axes(handles.axes1);
imshow('cond.png')

 end

 if ((90 < pos(1)) && (pos(1) < 100) && (7 < pos(2)) && (pos(2) < 11))
 axes(handles.axes2);
 imshow('compH.png')  
 else
axes(handles.axes2);
 imshow('comp.png')  
 end

if ((80 < pos(1)) && (pos(1) < 90) && (7 < pos(2)) && (pos(2) < 11))
axes(handles.axes3);
imshow('evapH.png')  
else
 axes(handles.axes3);
 imshow('evap.png')  
 end

if ((90 < pos(1)) && (pos(1) < 100) && (2 < pos(2)) && (pos(2) < 5))
axes(handles.axes4);
imshow('expH.png')  
else
 axes(handles.axes4);
 imshow('exp.png')  
end

通常情况下，GUI 运行良好，直到我通过将鼠标悬停在预定框上来触发其中一个 if 语句。然后 GUI 停止响应并且不会再次打开，直到 Matlab 重新启动。

Answer 1

如果不查看完整代码，很难说出 MATLAB 崩溃的原因。出于这个原因，我写了下面的简短示例。它说明了我将如何编写一个模拟 rollover effect 的 GUI使用 WindowButtonMotionFcn回调:

function testRolloverGUI()
    %# prepare rollover image
    imgOff = imread('coins.png');
    imgOn = imcomplement(imgOff);

    %# setup figure
    hFig = figure('Resize','off', 'MenuBar','none', 'Color','w');
    set(hFig, 'WindowButtonMotionFcn',@figWindowButtonMotionFcn);
    hTxt = uicontrol('Style','text', 'String','(0,0)');

    %# setup axes
    NUM = 4;
    hAx = zeros(1,NUM);
    hImg = zeros(1,NUM);
    for k=1:NUM
        hAx(k) = subplot(2,2,k);
        hImg(k) = imagesc(imgOff, 'Parent',hAx(k));
    end
    colormap(gray)
    set(hAx, 'XTick',[], 'YTick',[], 'Box','on')

    %# get corner-points of each axis
    set(hAx, 'Units','pixels')
    axPos = cell2mat( get(hAx,'Position') );
    p = zeros(5,2,NUM);
    for k=1:NUM
        p(:,:,k) = bsxfun(@plus, axPos(k,1:2), ...
            [0 0; axPos(k,3) 0; axPos(k,3:4); 0 axPos(k,4); 0 0]);
    end

    %# callback function
    function figWindowButtonMotionFcn(hObj,ev)
        %# get mouse current position
        pos = get(hObj, 'CurrentPoint');
        set(hTxt, 'String',sprintf('(%g,%g)',pos))

        %# for each axis, determine if we are inside it
        for i=1:numel(hImg)
            if inpolygon(pos(1),pos(2), p(:,1,i),p(:,2,i))
                set(hImg(i), 'CData',imgOn)
                set(hAx(i), 'LineWidth',3, 'XColor','r', 'YColor','r')
            else
                set(hImg(i), 'CData',imgOff)
                set(hAx(i), 'LineWidth',1, 'XColor','k', 'YColor','k')
            end
        end
    end
end

---

编辑#2

为了回应您的意见，我在 GUIDE 中重新创建了示例。以下是主要部分:

%# --- Executes just before rollover is made visible.
function rollover_OpeningFcn(hObject, eventdata, handles, varargin)

    %# Choose default command line output for rollover
    handles.output = hObject;

    %# allocate
    NUM = 4;
    imgOff = cell(1,NUM);
    imgOn = cell(1,NUM);
    hImg = zeros(1,NUM);

    %# read images
    imgOff{1} = imread('coins.png');
    imgOn{1} = imcomplement(imread('coins.png'));
    imgOff{2} = imread('coins.png');
    imgOn{2} = imcomplement(imread('coins.png'));
    imgOff{3} = imread('coins.png');
    imgOn{3} = imcomplement(imread('coins.png'));
    imgOff{4} = imread('coins.png');
    imgOn{4} = imcomplement(imread('coins.png'));

    %# setup axes
    hAx = [handles.axes1 handles.axes2 handles.axes3 handles.axes4];
    for i=1:NUM
        hImg(i) = imagesc(imgOff{i}, 'Parent',hAx(i));
    end
    colormap(hObject, 'gray')
    set(hAx, 'XTick',[], 'YTick',[], 'Box','on')

    %# make sure axes units match that of the figure
    set(hAx, 'Units',get(hObject, 'Units'))

    %# check axes parent container (figure or panel)
    hAxParents = cell2mat( get(hAx,'Parent') );
    idx = ismember(get(hAxParents,'Type'), 'uipanel');
    ppos = cell2mat( get(hAxParents(idx), 'Position') );

    %# adjust position relative to parent container
    axPos = cell2mat( get(hAx,'Position') );
    axPos(idx,1:2) = axPos(idx,1:2) + ppos(:,1:2);

    %# compute corner-points of each axis
    p = zeros(5,2,NUM);
    for k=1:NUM
        p(:,:,k) = bsxfun(@plus, axPos(k,1:2), ...
            [0 0; axPos(k,3) 0; axPos(k,3:4); 0 axPos(k,4); 0 0]);
    end

    %# store in handles structure
    handles.p = p;
    handles.hAx = hAx;
    handles.hImg = hImg;
    handles.imgOff = imgOff;
    handles.imgOn = imgOn;

    %# Update handles structure
    guidata(hObject, handles);


%# --- Executes on mouse motion over figure - except title and menu.
function figure1_WindowButtonMotionFcn(hObject, eventdata, handles)

    %# CurrentPoint
    pos = get(hObject,'CurrentPoint');
    set(handles.text1,'String',sprintf('(%g,%g)',pos));

    %# for each axis, determine if we are inside it
    for i=1:numel(handles.hImg)
        if inpolygon(pos(1),pos(2), handles.p(:,1,i),handles.p(:,2,i))
            set(handles.hImg(i), 'CData',handles.imgOn{i})
            set(handles.hAx(i), 'LineWidth',3, 'XColor','r', 'YColor','r')
        else
            set(handles.hImg(i), 'CData',handles.imgOff{i})
            set(handles.hAx(i), 'LineWidth',1, 'XColor','k', 'YColor','k')
        end
    end

GUI 的组件与以前基本相同，只是坐标轴包含在 uipanel 中(类似于 GUI 的屏幕截图):

一些注意事项:

• 由于我们的目标是将图形的 CurrentPoint 与坐标轴位置进行比较，因此它们具有与图形相同的 Units 非常重要，因此: set(hAx, 'Units',get(hObject, 'Units'))

• 根据 documentation ，一个轴的 Position 属性是相对于它的父容器的，因为四个轴在一个面板内，我们需要相应地调整它们的位置:axPos(idx,1:2) = axPos (idx,1:2) + ppos(:,1:2);