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Update events handling documentation to work with Python 3. #6354

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Merged
tacaswell merged 1 commit into from
May 1, 2016
Merged

Update events handling documentation to work with Python 3. #6354

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25 changes: 13 additions & 12 deletions doc/users/event_handling.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -34,8 +34,8 @@ was pressed::
ax.plot(np.random.rand(10))

def onclick(event):
print 'button=%d, x=%d, y=%d, xdata=%f, ydata=%f'%(
event.button, event.x, event.y, event.xdata, event.ydata)
print('button=%d, x=%d, y=%d, xdata=%f, ydata=%f' %
(event.button, event.x, event.y, event.xdata, event.ydata))

cid = fig.canvas.mpl_connect('button_press_event', onclick)

Expand Down Expand Up @@ -128,7 +128,7 @@ is created every time a mouse is pressed::
self.cid = line.figure.canvas.mpl_connect('button_press_event', self)

def __call__(self, event):
print 'click', event
print('click', event)
if event.inaxes!=self.line.axes: return
self.xs.append(event.xdata)
self.ys.append(event.ydata)
Expand Down Expand Up @@ -196,7 +196,7 @@ Here is the solution::

contains, attrd = self.rect.contains(event)
if not contains: return
print 'event contains', self.rect.xy
print('event contains', self.rect.xy)
x0, y0 = self.rect.xy
self.press = x0, y0, event.xdata, event.ydata

Expand All @@ -207,7 +207,8 @@ Here is the solution::
x0, y0, xpress, ypress = self.press
dx = event.xdata - xpress
dy = event.ydata - ypress
#print 'x0=%f, xpress=%f, event.xdata=%f, dx=%f, x0+dx=%f'%(x0, xpress, event.xdata, dx, x0+dx)
#print('x0=%f, xpress=%f, event.xdata=%f, dx=%f, x0+dx=%f' %
# (x0, xpress, event.xdata, dx, x0+dx))
self.rect.set_x(x0+dx)
self.rect.set_y(y0+dy)

Expand Down Expand Up @@ -271,7 +272,7 @@ Extra credit solution::
if DraggableRectangle.lock is not None: return
contains, attrd = self.rect.contains(event)
if not contains: return
print 'event contains', self.rect.xy
print('event contains', self.rect.xy)
x0, y0 = self.rect.xy
self.press = x0, y0, event.xdata, event.ydata
DraggableRectangle.lock = self
Expand Down Expand Up @@ -361,22 +362,22 @@ background that the mouse is over::
import matplotlib.pyplot as plt

def enter_axes(event):
print 'enter_axes', event.inaxes
print('enter_axes', event.inaxes)
event.inaxes.patch.set_facecolor('yellow')
event.canvas.draw()

def leave_axes(event):
print 'leave_axes', event.inaxes
print('leave_axes', event.inaxes)
event.inaxes.patch.set_facecolor('white')
event.canvas.draw()

def enter_figure(event):
print 'enter_figure', event.canvas.figure
print('enter_figure', event.canvas.figure)
event.canvas.figure.patch.set_facecolor('red')
event.canvas.draw()

def leave_figure(event):
print 'leave_figure', event.canvas.figure
print('leave_figure', event.canvas.figure)
event.canvas.figure.patch.set_facecolor('grey')
event.canvas.draw()

Expand All @@ -403,7 +404,6 @@ background that the mouse is over::
plt.show()



.. _object-picking:

Object picking
Expand Down Expand Up @@ -503,7 +503,8 @@ properties of the line. Here is the code::
xdata = thisline.get_xdata()
ydata = thisline.get_ydata()
ind = event.ind
print 'onpick points:', zip(xdata[ind], ydata[ind])
points = tuple(zip(xdata[ind], ydata[ind]))
print('onpick points:', points)

fig.canvas.mpl_connect('pick_event', onpick)

Expand Down
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