Matlab GUI 给出的致命错误

Question

已编辑帖子

这些是我使用您的模板创建的新功能来帮助我。 发生的事情是虽然代码工作正常，但“检查光标”框不在轴的顶部。事实上，它们相距甚远。我使用了一次 disp(axPos) 和 set(hAx, 'Units','pixels') ，一次用它注释掉了。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

哪个是轴的 GUIDE 坐标，而不是“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hitboxes

注意* 其他的都在屏幕右上角之外，或者应该是。

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

注意* 这与注释掉代码时发生的情况完全相同。

8 月 2 日测试 .

.

.

.

附录 原帖

运行我的 GUI [Fatal Error] 后出现此错误：-1:-1: Premature end of file。

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，在我通过将鼠标悬停在预定框上触发其中一个 if 语句之前，GUI 运行良好。然后 GUI 停止响应，直到 Matlab 重新启动后才会再次打开。

Answer 1

如果不查看您的整个代码，就很难判断 MATLAB 为何会崩溃。出于这个原因，我写了下面的简短示例。它说明了我将如何使用WindowButtonMotionFcn 回调编写一个模拟rollover effect 的GUI：

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

为了响应您的 cmets，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 具有与以前基本相同的组件，除了轴包含在 uipanel 内（类似于您的 GUI 屏幕截图）：

需要注意的几点：

• 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'))

  李>

• 根据documentation，一个轴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);