#!/usr/bin/env python """ Demonstrates the ImageInspectorTool and overlay on a colormapped image plot. The underlying plot is similar to the one in cmap_image_plot.py. - Left-drag pans the plot. - Mousewheel up and down zooms the plot in and out. - Pressing "z" brings up the Zoom Box, and you can click-drag a rectangular region to zoom. If you use a sequence of zoom boxes, pressing alt-left-arrow and alt-right-arrow moves you forwards and backwards through the "zoom history". - Pressing "p" will toggle the display of the image inspector overlay. """ # Major library imports from numpy import linspace, meshgrid, pi, sin from enthought.enable.example_support import DemoFrame, demo_main # Enthought library imports from enthought.enable.api import Component, ComponentEditor, Window from enthought.traits.api import HasTraits, Instance from enthought.traits.ui.api import Item, Group, View # Chaco imports from enthought.chaco.api import ArrayPlotData, jet, Plot from enthought.chaco.tools.api import PanTool, ZoomTool from enthought.chaco.tools.image_inspector_tool import ImageInspectorTool, \ ImageInspectorOverlay #=============================================================================== # # Create the Chaco plot. #=============================================================================== def _create_plot_component():# Create a scalar field to colormap xbounds = (-2*pi, 2*pi, 600) ybounds = (-1.5*pi, 1.5*pi, 300) xs = linspace(*xbounds) ys = linspace(*ybounds) x, y = meshgrid(xs,ys) z = sin(x)*y # Create a plot data obect and give it this data pd = ArrayPlotData() pd.set_data("imagedata", z) # Create the plot plot = Plot(pd) img_plot = plot.img_plot("imagedata", xbounds = xbounds[:2], ybounds = ybounds[:2], colormap=jet)[0] # Tweak some of the plot properties plot.title = "My First Image Plot" plot.padding = 50 # Attach some tools to the plot plot.tools.append(PanTool(plot)) zoom = ZoomTool(component=plot, tool_mode="box", always_on=False) plot.overlays.append(zoom) imgtool = ImageInspectorTool(img_plot) img_plot.tools.append(imgtool) overlay = ImageInspectorOverlay(component=img_plot, image_inspector=imgtool, bgcolor="white", border_visible=True) img_plot.overlays.append(overlay) return plot #=============================================================================== # Attributes to use for the plot view. size = (800, 600) title="Inspecting a Colormapped Image Plot" #=============================================================================== # # Demo class that is used by the demo.py application. #=============================================================================== class Demo(HasTraits): plot = Instance(Component) traits_view = View( Group( Item('plot', editor=ComponentEditor(size=size), show_label=False), orientation = "vertical"), resizable=True, title=title ) def _plot_default(self): return _create_plot_component() demo = Demo() #=============================================================================== # Stand-alone frame to display the plot. #=============================================================================== class PlotFrame(DemoFrame): def _create_window(self): # Return a window containing our plots return Window(self, -1, component=_create_plot_component()) if __name__ == "__main__": demo_main(PlotFrame, size=size, title=title) #--EOF---