Changeset 482

Timestamp:

02/18/05 17:40:22 (20 years ago)

Author:

cal103

Message:

In set_panels(), disabled labelling of interior subplots and squeezed out
excess space between rows and columns in a rectangular asaplot plot array.
Implemented cursor position readback and interactive region selection via
the new position() and region() methods, though neither of these will work
properly until a blocking mechanism is added to matplotlib (a known
deficiency).

File:

• trunk/python/asaplot.py (modified) (20 diffs)

trunk/python/asaplot.py

@@ -7 +7 @@
 import Tkinter as Tk
 
-#print "Importing matplotlib with TkAgg backend."
 import matplotlib
 matplotlib.use("TkAgg")
@@ -16 +15 @@
 from matplotlib.figure import Figure, Text
 from matplotlib.numerix import sqrt
-from matplotlib import rc,rcParams
+from matplotlib import rc, rcParams
 
 # Force use of the newfangled toolbar.
@@ -29 +28 @@
     """
 
-    def __init__(self, rows=1, cols=0, title='', size=(7,5), buffering=False):
+    def __init__(self, rows=1, cols=0, title='', size=(8,6), buffering=False):
         """
         Create a new instance of the ASAPlot plotting class.
@@ -37 +36 @@
         """
         self.window = Tk.Tk()
-        self.is_dead = False
-        def dest_callback():
-            self.is_dead = True
-            self.window.destroy()
-        
-        self.window.protocol("WM_DELETE_WINDOW", dest_callback) 
-        #self.frame1 = Tk.Frame(self.window, relief=Tk.RIDGE, borderwidth=4)
-        #self.frame1.pack(fill=Tk.BOTH)
-
-        self.figure = Figure(figsize=size,facecolor='#ddddee')
+        self.is_dead = False
+        def dest_callback():
+            self.is_dead = True
+            self.window.destroy()
+
+        self.window.protocol("WM_DELETE_WINDOW", dest_callback)
+
+        self.figure = Figure(figsize=size, facecolor='#ddddee')
         self.canvas = FigureCanvasTkAgg(self.figure, master=self.window)
         self.canvas.get_tk_widget().pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)
@@ -71 +68 @@
         matplotlib.interactive = True
         self.buffering = buffering
-        
+
         self.canvas.show()
 
@@ -86 +83 @@
         self.colours[0] = 1
         self.lines = []
-        
+
 
     def delete(self, numbers=None):
@@ -298 +295 @@
 
 
+    def position(self):
+        """
+        Use the mouse to get a position from a graph.
+        """
+
+        def position_disable(event):
+            self.register('button_press', None)
+            print '%.4f, %.4f' % (event.xdata, event.ydata)
+
+        print 'Press any mouse button...'
+        self.register('button_press', position_disable)
+
+
     def quit(self):
         """
@@ -303 +313 @@
         """
         self.window.destroy()
+
+
+    def region(self):
+        """
+        Use the mouse to get a rectangular region from a plot.
+
+        The return value is [x0, y0, x1, y1] in world coordinates.
+        """
+
+        def region_start(event):
+            height = self.canvas.figure.bbox.height()
+            self.rect = {'fig': None, 'height': height,
+                         'x': event.x, 'y': height - event.y,
+                         'world': [event.xdata, event.ydata,
+                                   event.xdata, event.ydata]}
+            self.register('button_press', None)
+            self.register('motion_notify', region_draw)
+            self.register('button_release', region_disable)
+
+        def region_draw(event):
+            self.canvas._tkcanvas.delete(self.rect['fig'])
+            self.rect['fig'] = self.canvas._tkcanvas.create_rectangle(
+                                self.rect['x'], self.rect['y'],
+                                event.x, self.rect['height'] - event.y)
+
+        def region_disable(event):
+            self.register('motion_notify', None)
+            self.register('button_release', None)
+
+            self.canvas._tkcanvas.delete(self.rect['fig'])
+
+            self.rect['world'][2:4] = [event.xdata, event.ydata]
+            print '(%.2f, %.2f)  (%.2f, %.2f)' % (self.rect['world'][0],
+                self.rect['world'][1], self.rect['world'][2],
+                self.rect['world'][3])
+
+        self.register('button_press', region_start)
+
+        # This has to be modified to block and return the result (currently
+        # printed by region_disable) when that becomes possible in matplotlib.
+
+        return [0.0, 0.0, 0.0, 0.0]
 
 
@@ -309 +361 @@
         Register, reregister, or deregister events of type 'button_press',
         'button_release', or 'motion_notify'.
-        
+
         The specified callback function should have the following signature:
 
@@ -371 +423 @@
 
 
+    def save(self, fname=None):
+        """
+        Save the plot to a file.
+
+        fname is the name of the output file.  The image format is determined
+        from the file suffix; 'png', 'ps', and 'eps' are recognized.  If no
+        file name is specified 'yyyymmdd_hhmmss.png' is created in the current
+        directory.
+        """
+        if fname is None:
+            from datetime import datetime
+            dstr = datetime.now().strftime('%Y%m%d_%H%M%S')
+            fname = 'asap'+dstr+'.png'
+
+        d = ['png','.ps','eps']
+
+        from os.path import expandvars
+        fname = expandvars(fname)
+
+        if fname[-3:].lower() in d:
+            try:
+                self.canvas.print_figure(fname)
+                print 'Written file %s' % (fname)
+            except IOError, msg:
+                print 'Failed to save %s: Error msg was\n\n%s' % (fname, err)
+                return
+        else:
+            print "Invalid image type. Valid types are:"
+            print "ps, eps, png"
+
+
     def set_axes(self, what=None, *args, **kwargs):
         """
@@ -419 +502 @@
         getattr(self.figure, "set_%s"%what)(*args, **newargs)
         self.show()
+
+
+    def set_limits(self, xlim=None, ylim=None):
+        """
+        Set x-, and y-limits for each subplot.
+
+        xlim = [xmin, xmax] as in axes.set_xlim().
+        ylim = [ymin, ymax] as in axes.set_ylim().
+        """
+
+        for s in self.subplots:
+            self.axes  = s['axes']
+            self.lines = s['lines']
+            if xlim is not None:
+                self.axes.set_xlim(xlim)
+            if ylim is not None:
+                self.axes.set_ylim(ylim)
+        return
 
 
@@ -469 +570 @@
         """
         Set the panel layout.
-        
+
         rows and cols, if cols != 0, specify the number of rows and columns in
         a regular layout.   (Indexing of these panels in matplotlib is row-
@@ -483 +584 @@
         non-regular panel layouts to be constructed via multiple calls.  Any
         other value of n clears the plot and produces a rectangular array of
-        empty panels.
+        empty panels.  The number of these may be limited by nplots.
         """
         if n < 0 and len(self.subplots):
@@ -489 +590 @@
             self.set_title()
 
-        if rows < 1:
-            rows = 1
-        nel = 1
-        if cols == 0:
-            nel = rows
+        if rows < 1: rows = 1
+
+        if cols <= 0:
             i = int(sqrt(rows))
             if i*i < rows: i += 1
@@ -500 +599 @@
             if i*(i-1) >= rows: i -= 1
             rows = i
-        else:
-            if nplots > -1:
-                nel=nplots
+
         if 0 <= n < rows*cols:
             i = len(self.subplots)
             self.subplots.append({})
+
             self.subplots[i]['axes']  = self.figure.add_subplot(rows,
                                             cols, n+1)
@@ -512 +610 @@
             if i == 0: self.subplot(0)
 
+            self.rows = 0
+            self.cols = 0
+
         else:
             self.subplots = []
-            for i in range(nel):
+
+            if nplots < 1 or rows*cols < nplots:
+                nplots = rows*cols
+
+            for i in range(nplots):
                 self.subplots.append({})
+
                 self.subplots[i]['axes']  = self.figure.add_subplot(rows,
                                                 cols, i+1)
                 self.subplots[i]['lines'] = []
 
+                if rows > 1 or cols > 1:
+                    # Squeeze the plots together.
+                    pos = self.subplots[i]['axes'].get_position()
+                    if cols > 1: pos[2] *= 1.1
+                    if rows > 1: pos[3] *= 1.1
+                    self.subplots[i]['axes'].set_position(pos)
+
+                # Suppress tick labelling for interior subplots.
+                if i <= (rows-1)*cols - 1:
+                    # Suppress x-labels for frames not in the bottom row.
+                    self.subplots[i]['axes'].set_xticklabels([])
+
+                if i%cols:
+                    # Suppress y-labels for frames not in the left column.
+                    self.subplots[i]['axes'].set_yticklabels([])
+
+                self.rows = rows
+                self.cols = cols
+
             self.subplot(0)
 
@@ -540 +665 @@
         if not self.buffering:
             if self.loc:
-                for j in range(len(self.subplots)):
-                    lines  = []
-                    labels = []
-                    i = 0
-                    for line in self.subplots[j]['lines']:
-                        i += 1
-                        if line is not None:
-                            lines.append(line[0])
-                            lbl = line[0].get_label()
-                            if lbl == '':
-                                lbl = str(i)
-                            labels.append(lbl)
-
-                    if len(lines):
-                        self.subplots[j]['axes'].legend(tuple(lines), tuple(labels), self.loc)
-                    else:
-                        self.subplots[j]['axes'].legend((' '))
+                for j in range(len(self.subplots)):
+                    lines  = []
+                    labels = []
+                    i = 0
+                    for line in self.subplots[j]['lines']:
+                        i += 1
+                        if line is not None:
+                            lines.append(line[0])
+                            lbl = line[0].get_label()
+                            if lbl == '':
+                                lbl = str(i)
+                            labels.append(lbl)
+
+                    if len(lines):
+                        self.subplots[j]['axes'].legend(tuple(lines),
+                                                        tuple(labels),
+                                                        self.loc)
+                    else:
+                        self.subplots[j]['axes'].legend((' '))
 
             self.window.wm_deiconify()
@@ -592 +719 @@
         """
         self.figure.text(*args, **kwargs)
-        self.show()        
+        self.show()
+
 
     def unmap(self):
@@ -599 +727 @@
         """
         self.window.wm_withdraw()
-
-    def set_limits(self,xlim=None,ylim=None):
-        for s in self.subplots:
-            self.axes  = s['axes']
-            self.lines = s['lines']
-            if xlim is not None:
-                self.axes.set_xlim(xlim)
-            if ylim is not None:
-                self.axes.set_ylim(ylim)
-        return
-
-    def save(self, fname=None):
-        """
-        Save the plot to a file. The know formats are 'png', 'ps', 'eps'.
-        Parameters:
-             filename:    The name of the output file. This is optional
-                          and autodetects the image format from the file
-                          suffix. If non filename is specified a file
-                          called 'yyyymmdd_hhmmss.png' is created in the
-                          current directory.
-        """
-        if fname is None:
-            from datetime import datetime
-            dstr = datetime.now().strftime('%Y%m%d_%H%M%S')
-            fname = 'asap'+dstr+'.png'
-            
-        d = ['png','.ps','eps']
-
-        from os.path import expandvars
-        fname = expandvars(fname)
-
-        if fname[-3:].lower() in d:
-            try:
-                self.canvas.print_figure(fname)
-                print 'Written file %s' % (fname)
-            except IOError, msg:
-                print 'Failed to save %s: Error msg was\n\n%s' % (fname, err)
-                return
-        else:
-            print "Invalid image type. Valid types are:"
-            print "ps, eps, png"
 
 
@@ -684 +771 @@
     Load the colour dictionary from the specified file.
     """
-    print 'Loading colour dictionary from', file
+    print 'Loading colour dictionary from', filename
     from os.path import expandvars
     filename = expandvars(filename)