Dynamically reading cursor location

조회 수: 27 (최근 30일)
Ranjan Sonalkar
Ranjan Sonalkar 2020년 6월 23일
댓글: Ameer Hamza 2020년 6월 25일
I am using ginput to select a location within a plot. Is there a function that would allow me to access the current location of the cursor as I move it (before pressing the mouse) and display the coordinates, something like how the current lat/long of the cursor position are displayed on Google Earth?

채택된 답변

Ameer Hamza
Ameer Hamza 2020년 6월 23일
You can use the WindowButtonMotionFcn callback of the figure object. Run the following example
fig = figure();
ax = axes(fig);
fig.WindowButtonMotionFcn = {@mouseMotionCB, ax};
function mouseMotionCB(fig, event, ax_handle)
fprintf('Current Point is %f %f %f\n', ax_handle.CurrentPoint(1,1:3));
end
  댓글 수: 5
Ranjan Sonalkar
Ranjan Sonalkar 2020년 6월 24일
편집: Ranjan Sonalkar 2020년 6월 24일
I put in a call to waitforbuttonpress just prior to ginput. So, now the mouse position shows dynamically up as the cursor is moved. When the user finds the desired location on the scale, a double-click of the mouse (first to resume after the waitforbuttonpress call, and the second as a response to ginput at the desired location) appeears to be the acceptable solution.
Ameer Hamza
Ameer Hamza 2020년 6월 25일
If you want to use ginput(), then an alternative solution is to use a timer() objects to detect the values. In this case, you do not need to double click the axes object.
fig = figure('Interruptible', 'off');
ax1 = subplot(1,2,1);
ax2 = subplot(1,2,2);
fig.WindowButtonMotionFcn = @(~,~) [];
t = timer('Period', 0.1, 'ExecutionMode', 'fixedRate', 'TimerFcn', {@mouseMotionCB, ax1, ax2});
start(t)
ginput(1)
stop(t);
delete(t);
function mouseMotionCB(fig, event, ax1, ax2)
currentPoint1 = ax1.CurrentPoint(1,1:3);
x1 = currentPoint1(1);
y1 = currentPoint1(2);
if (ax1.XLim(1)<x1)&&(x1<ax1.XLim(2)) && (ax1.YLim(1)<y1)&&(y1<ax1.YLim(2))
fprintf('This is axes 1, Current Point is %f %f %f\n', currentPoint1);
end
currentPoint2 = ax2.CurrentPoint(1,1:3);
x2 = currentPoint2(1);
y2 = currentPoint2(2);
if (ax2.XLim(1)<x2)&&(x2<ax2.XLim(2)) && (ax2.YLim(1)<y2)&&(y2<ax2.YLim(2))
fprintf('This is axes 2, Current Point is %f %f %f\n', currentPoint2);
end
end

댓글을 달려면 로그인하십시오.

추가 답변 (0개)

카테고리

Help CenterFile Exchange에서 Surface and Mesh Plots에 대해 자세히 알아보기

제품

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by