add text_font to LengenRV and LegendHorizontal to manage different font name. Add some modification to allow matplotlib legend update when we set a new figure or when you add new line/scatter/bar in graph. Add example to manage legend update with matplotlib legend.

Author: mp-007

example_all_interactive_options/graph_widget.py

@@ -47,7 +47,7 @@ class MatplotFigure(Widget):
     pos_y_rect_ver=NumericProperty(0)  
     invert_rect_ver = BooleanProperty(False)
     invert_rect_hor = BooleanProperty(False)
-    legend_instance = ObjectProperty(None)
+    legend_instance = ObjectProperty(None, allownone=True)
     legend_do_scroll_x = BooleanProperty(True)
     legend_do_scroll_y = BooleanProperty(True)
     do_pan_x = BooleanProperty(True)
@@ -83,9 +83,16 @@ def on_figure(self, obj, value):
             #set default xmin/xmax and ymin/ymax
             self.xmin,self.xmax = self.axes.get_xlim()
             self.ymin,self.ymax = self.axes.get_ylim()
-           
+        
+        if self.legend_instance:
+            self.legend_instance.reset_legend()
+            self.legend_instance=None
+            
         # Texture
         self._img_texture = Texture.create(size=(w, h))
+        
+        #close last figure in memory (avoid max figure warning)
+        matplotlib.pyplot.close()
 
     def __init__(self, **kwargs):
         super(MatplotFigure, self).__init__(**kwargs)

example_basic/graph_widget.py

@@ -47,7 +47,7 @@ class MatplotFigure(Widget):
     pos_y_rect_ver=NumericProperty(0)  
     invert_rect_ver = BooleanProperty(False)
     invert_rect_hor = BooleanProperty(False)
-    legend_instance = ObjectProperty(None)
+    legend_instance = ObjectProperty(None, allownone=True)
     legend_do_scroll_x = BooleanProperty(True)
     legend_do_scroll_y = BooleanProperty(True)
     do_pan_x = BooleanProperty(True)
@@ -83,9 +83,16 @@ def on_figure(self, obj, value):
             #set default xmin/xmax and ymin/ymax
             self.xmin,self.xmax = self.axes.get_xlim()
             self.ymin,self.ymax = self.axes.get_ylim()
-           
+        
+        if self.legend_instance:
+            self.legend_instance.reset_legend()
+            self.legend_instance=None
+            
         # Texture
         self._img_texture = Texture.create(size=(w, h))
+        
+        #close last figure in memory (avoid max figure warning)
+        matplotlib.pyplot.close()
 
     def __init__(self, **kwargs):
         super(MatplotFigure, self).__init__(**kwargs)

example_big_data/graph_widget.py

@@ -47,7 +47,7 @@ class MatplotFigure(Widget):
     pos_y_rect_ver=NumericProperty(0)  
     invert_rect_ver = BooleanProperty(False)
     invert_rect_hor = BooleanProperty(False)
-    legend_instance = ObjectProperty(None)
+    legend_instance = ObjectProperty(None, allownone=True)
     legend_do_scroll_x = BooleanProperty(True)
     legend_do_scroll_y = BooleanProperty(True)
     do_pan_x = BooleanProperty(True)
@@ -83,9 +83,16 @@ def on_figure(self, obj, value):
             #set default xmin/xmax and ymin/ymax
             self.xmin,self.xmax = self.axes.get_xlim()
             self.ymin,self.ymax = self.axes.get_ylim()
-           
+        
+        if self.legend_instance:
+            self.legend_instance.reset_legend()
+            self.legend_instance=None
+            
         # Texture
         self._img_texture = Texture.create(size=(w, h))
+        
+        #close last figure in memory (avoid max figure warning)
+        matplotlib.pyplot.close()
 
     def __init__(self, **kwargs):
         super(MatplotFigure, self).__init__(**kwargs)

example_cursor/graph_widget.py

@@ -47,7 +47,7 @@ class MatplotFigure(Widget):
     pos_y_rect_ver=NumericProperty(0)  
     invert_rect_ver = BooleanProperty(False)
     invert_rect_hor = BooleanProperty(False)
-    legend_instance = ObjectProperty(None)
+    legend_instance = ObjectProperty(None, allownone=True)
     legend_do_scroll_x = BooleanProperty(True)
     legend_do_scroll_y = BooleanProperty(True)
     do_pan_x = BooleanProperty(True)
@@ -83,9 +83,16 @@ def on_figure(self, obj, value):
             #set default xmin/xmax and ymin/ymax
             self.xmin,self.xmax = self.axes.get_xlim()
             self.ymin,self.ymax = self.axes.get_ylim()
-           
+        
+        if self.legend_instance:
+            self.legend_instance.reset_legend()
+            self.legend_instance=None
+            
         # Texture
         self._img_texture = Texture.create(size=(w, h))
+        
+        #close last figure in memory (avoid max figure warning)
+        matplotlib.pyplot.close()
 
     def __init__(self, **kwargs):
         super(MatplotFigure, self).__init__(**kwargs)

example_cursor_scatter_experimental/graph_widget_scatter.py

@@ -47,7 +47,7 @@ class MatplotFigureScatter(Widget):
     pos_y_rect_ver=NumericProperty(0)   
     invert_rect_ver = BooleanProperty(False)
     invert_rect_hor = BooleanProperty(False)
-    legend_instance = ObjectProperty(None)
+    legend_instance = ObjectProperty(None, allownone=True)
     legend_do_scroll_x = BooleanProperty(True)
     legend_do_scroll_y = BooleanProperty(True)    
     do_pan_x = BooleanProperty(True)
@@ -85,10 +85,17 @@ def on_figure(self, obj, value):
             #set default xmin/xmax and ymin/ymax
             self.xmin,self.xmax = self.axes.get_xlim()
             self.ymin,self.ymax = self.axes.get_ylim()
+
+        if self.legend_instance:
+            self.legend_instance.reset_legend()
+            self.legend_instance=None
 
         # Texture
         self._img_texture = Texture.create(size=(w, h))
 
+        #close last figure in memory (avoid max figure warning)
+        matplotlib.pyplot.close()
+
     def __init__(self, **kwargs):
         super(MatplotFigureScatter, self).__init__(**kwargs)
 

example_legend/graph_widget.py

@@ -47,7 +47,7 @@ class MatplotFigure(Widget):
     pos_y_rect_ver=NumericProperty(0)  
     invert_rect_ver = BooleanProperty(False)
     invert_rect_hor = BooleanProperty(False)
-    legend_instance = ObjectProperty(None)
+    legend_instance = ObjectProperty(None, allownone=True)
     legend_do_scroll_x = BooleanProperty(True)
     legend_do_scroll_y = BooleanProperty(True)
     do_pan_x = BooleanProperty(True)
@@ -83,9 +83,16 @@ def on_figure(self, obj, value):
             #set default xmin/xmax and ymin/ymax
             self.xmin,self.xmax = self.axes.get_xlim()
             self.ymin,self.ymax = self.axes.get_ylim()
-           
+        
+        if self.legend_instance:
+            self.legend_instance.reset_legend()
+            self.legend_instance=None
+            
         # Texture
         self._img_texture = Texture.create(size=(w, h))
+        
+        #close last figure in memory (avoid max figure warning)
+        matplotlib.pyplot.close()
 
     def __init__(self, **kwargs):
         super(MatplotFigure, self).__init__(**kwargs)