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from random import choice
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from traits.api import Any, Enum, HasTraits, Instance, Int, List, Str
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from chaco.example_support import COLOR_PALETTE
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from chaco.api import Plot
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from chaco.plot_canvas_toolbar import PlotToolbarButton
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class ButtonController(HasTraits):
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""" Tells buttons what to do
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Buttons defer to this when they are activated.
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modifier = Enum("control", "shift", "alt")
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# The list of buttons that are currently "down"
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# A reference to the Plot object that displays scatterplots of multiple
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# The transient plot overlay housing self.plot
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# The name of the scatter plot in the Plot
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_scatterplot_name = "ButtonControllerPlot"
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def notify(self, button, type, event):
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""" Informs the controller that the particular **button** just
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got an event. **Type** is either "up" or "down". Event is the
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#control_down = getattr(event, self.modifier + "_down", False)
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print "[notify]", button.plotname, type, "control:", control_down
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if control_down and button in self.active_buttons:
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self.button_deselected(button)
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# Deselect all current buttons and select the new one
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[self.button_deselected(b) for b in self.active_buttons \
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self.button_selected(button)
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self.button_deselected(button)
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def button_selected(self, button):
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print "active:", [b.plotname for b in self.active_buttons]
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print "new button selected:", button.plotname
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if button in self.active_buttons:
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numbuttons = len(self.active_buttons)
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self.active_buttons.append(button)
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self.active_buttons[0].hide_overlay()
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self.active_buttons.append(button)
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self.show_scatterplot(*self.active_buttons)
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# Replace the last active button with the new one
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self.active_buttons[1].button_state = "up"
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self.active_buttons[1] = button
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self.hide_scatterplot()
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self.show_scatterplot(*self.active_buttons)
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button.button_state = "down"
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def button_deselected(self, button):
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print "active:", [b.plotname for b in self.active_buttons]
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print "new button deselected:", button.plotname
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if button not in self.active_buttons:
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button.button_state = "up"
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numbuttons = len(self.active_buttons)
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if button in self.active_buttons:
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self.active_buttons.remove(button)
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if button in self.active_buttons:
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self.active_buttons.remove(button)
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self.hide_scatterplot()
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remaining_button = self.active_buttons[0]
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remaining_button.show_overlay()
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button.button_state = "up"
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def show_scatterplot(self, b1, b2):
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if len(self.plot.plots) > 0:
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self.plot.delplot(*self.plot.plots.keys())
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cur_plot = self.plot.plot((b1.plotname+"_y", b2.plotname+"_y"),
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name=self._scatterplot_name,
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color=tuple(choice(COLOR_PALETTE)),
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self.plot.index_axis.title = b1.plotname
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#self.plot.value_axis.title = b2.plotname
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self.plot.title = b1.plotname + " vs. " + b2.plotname
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self.plot_overlay.visible = True
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self.plot.request_redraw()
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def hide_scatterplot(self):
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if self._scatterplot_name in self.plot.plots:
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self.plot.delplot(self._scatterplot_name)
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self.plot.index_range.set_bounds("auto", "auto")
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self.plot.value_range.set_bounds("auto", "auto")
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self.plot_overlay.visible = False
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class DataSourceButton(PlotToolbarButton):
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# A TransientPlotOverlay containing the timeseries plot of this datasource
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#overlay_bounds = List()
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# Can't call this "controller" because it conflicts with old tool dispatch
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button_controller = Instance(ButtonController)
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# Override inherited trait
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label_color = (0,0,0,1)
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# The overlay to display when the user holds the mouse down over us.
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#_overlay = Instance(AbstractOverlay)
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def normal_left_down(self, event):
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self.button_state = "down"
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self.button_controller.notify(self, "down", event)
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self.request_redraw()
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def normal_left_up(self, event):
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self.button_state = "up"
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self.button_controller.notify(self, "up", event)
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self.request_redraw()
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def normal_blob_down(self, event):
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if self.cur_bid == -1:
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self.cur_bid = event.bid
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self.normal_left_down(event)
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if hasattr(event, "bid"):
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event.window.capture_blob(self, event.bid,
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event.net_transform())
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def normal_blob_up(self, event):
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if event.bid == self.cur_bid:
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if hasattr(event, "bid"):
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event.window.release_blob(event.bid)
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self.normal_left_up(event)
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def normal_mouse_leave(self, event):
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return self.normal_left_up(event)
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def normal_mouse_enter(self, event):
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return self.normal_left_down(event)
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def show_overlay(self):
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if self.plot_overlay is not None:
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self.plot_overlay.visible = True
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self.request_redraw()
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def hide_overlay(self):
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if self.plot_overlay is not None:
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self.plot_overlay.visible = False
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self.request_redraw()
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def _do_layout(self):
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if self.canvas is not None:
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boff = self.canvas.bounds_offset
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self.plot_overlay.offset = (boff[0],
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boff[1] + self.y - self.container.y + self.height/2)
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self.plot_overlay.do_layout()
added
removed
examples/demo/canvas/data_source_button.py
