寡妇调整大小时，matlab图形事件侦听器不会触发 [英] matlab figure event listener does not trigger when widow resized
问题描述
版本:Matlab R2014b
Version: Matlab R2014b
XY问题免责声明:我的目标是使用某些自定义函数在图形中制作MATLAB格式的刻度，该自定义函数将刻度位置作为参数并输出一个字符串.默认刻度位置可以，但是我想控制标签.由于滴答声变化而无法执行回调函数会导致标签错误的滴答声.
XY problem disclaimer: my objective is to make MATLAB format ticks in my graphic with a certain custom function that takes as argument the tick position and outputs a string. Default tick placement is ok but I want to control the labels. Failure to execute the callback function as ticks change results in mislabelled ticks.
下面的MWE显示了回调的虚拟版本；真正的回调将刻度标签设置为
The MWE below shows dummy versions of the callback; the real callback sets tick labels to the output of
tick_formatter = @(tv)([sprintf('%1.2f',tv/10^N) 'e' num2str(N)])
(其中tv是以X为单位的刻度值). (这是R2015b及以后版本的ax.XAxis.Exponent的粗略替代，请参见 https://fr.mathworks.com/matlabcentral/answers/275054-change-multiple-exponent-on-x轴)
(where tv is the tick value in X units). (This is a crude replacement for ax.XAxis.Exponent of versions R2015b and following, see https://fr.mathworks.com/matlabcentral/answers/275054-change-multiple-exponent-on-x-axis)
实际问题:
我希望每次滴答变化(即其数量或y值变化)时都能执行某些操作"(在我的情况下，重新计算刻度标签).为此，我查看了addlistener，但我无法使其按预期工作.
I want to be able to do "something" (in my case recompute tick labels) every time ticks change (i.e. their number or their y-value changes). To do so I looked at addlistener but I cannot manage to make it work as I wish.
理想情况下，我会在XTick属性上放置一个侦听器，但它似乎无法正常工作.当XTickMode置于auto上时，放大和缩小(通过xlim()或手动进行缩放)或调整图形窗口的大小将导致刻度的数量/位置发生变化，从而更改get(ax,'XTick')返回的值，但不会触发此类事件侦听器.
Ideally, I would put a listener on the XTick property but it does not seem to work correctly. When XTickMode is on auto, zooming in and out (programatically by xlim() or by hand) or resizing the graphic window will cause change in the number / position of ticks, and consequently change the value returned by get(ax,'XTick'), but it will not trigger such an event listener.
要放大/缩小，一种解决方法是改为监听XLim，它会触发事件.但是我发现没有这样的变通方法来调整图形窗口的大小(至少在轴对象级别使用侦听器).
For zooming in/out, a workaround is to listen to XLim instead, which does trigger events; but I found no such workaround for figure window resizing (at least using listeners at the axes object level).
欢迎提出任何建议.
MWE :
% generate figure
x = 0:100;
y = x.^2;
figure(1)
clf() % ensure we cleared out previous tests
plot(x,y)
ax = gca();
% This event listener does nothing as you zoom in/out or resize the graphic
% window, even though XTick does change; it will only respond to explicit
% commands e.g. set(ax, 'XTick', ...).
listen_to_XTick = addlistener(ax, 'XTick', 'PostSet',@(src,evn) disp('XTick changed'));
% This event listener responds to zooming in/out, but not to window
% resizing
listen_to_XLim = addlistener(ax, 'XLim', 'PostSet',@(src,evn) disp('XLim changed'));
% Play a bit with the figure, zoom in/out, resize the graphics window etc.
% -> only listen_to_XLim ever gets triggered, never listen_to_XTick
% Other properties that do not seem to ever trigger as window is resized:
% 'XTick', 'XTickLabel', 'Position'
推荐答案
If you would like to change your tick labels when your figure window is resized, you could make use of the SizeChangedFcn callback of the figure window itself. Try:
f = figure('SizeChangedFcn',@(src,evn) disp('Window resized'))
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