View pan with MMB added.

Adding "geometry" & "cncjob" object doesn't cause auto zoom.

FlatCAMApp.py

@@ -1300,7 +1300,9 @@ class App(QtCore.QObject):
         self.inform.emit("Object (%s) created: %s" % (obj.kind, obj.options['name']))
         self.new_object_available.emit(obj)
         obj.plot()
-        self.on_zoom_fit(None)
+
+        if obj.kind not in ["geometry", "cncjob"]: self.on_zoom_fit(None)
+
         t1 = time.time()  # DEBUG
         self.log.debug("%f seconds adding object and plotting." % (t1 - t0))
 

PlotCanvas.py

@@ -66,6 +66,8 @@ class PlotCanvas:
         self.background = self.canvas.copy_from_bbox(self.axes.bbox)
 
         # Events
+        self.canvas.mpl_connect('button_press_event', self.on_mouse_down)
+        self.canvas.mpl_connect('button_release_event', self.on_mouse_up)
         self.canvas.mpl_connect('motion_notify_event', self.on_mouse_move)
         #self.canvas.connect('configure-event', self.auto_adjust_axes)
         self.canvas.mpl_connect('resize_event', self.auto_adjust_axes)
@@ -78,6 +80,9 @@ class PlotCanvas:
         self.mouse = [0, 0]
         self.key = None
 
+        self.mouse_press_button = -1
+        self.mouse_press_pos = [0, 0]
+
     def on_key_down(self, event):
         """
 
@@ -272,6 +277,19 @@ class PlotCanvas:
             ax.set_xlim((xmin + x * width, xmax + x * width))
             ax.set_ylim((ymin + y * height, ymax + y * height))
 
+        # Re-draw
+        self.canvas.draw()
+        self.background = self.canvas.copy_from_bbox(self.axes.bbox)                
+
+    def pan_by_coords(self, x, y):
+        xmin, xmax = self.axes.get_xlim()
+        ymin, ymax = self.axes.get_ylim()
+
+        # Adjust axes
+        for ax in self.figure.get_axes():
+            ax.set_xlim((xmin - x, xmax - x))
+            ax.set_ylim((ymin - y, ymax - y))
+
         # Re-draw
         self.canvas.draw()
         self.background = self.canvas.copy_from_bbox(self.axes.bbox)
@@ -326,6 +344,16 @@ class PlotCanvas:
                 self.pan(0, -0.3)
             return
 
+    def on_mouse_down(self, event):
+        FlatCAMApp.App.log.debug('on_mouse_down() button=%d, x=%d, y=%d, xdata=%f, ydata=%f' % (
+            event.button, event.x, event.y, event.xdata, event.ydata))
+
+        self.mouse_press_button = event.button
+        self.mouse_press_pos = [event.xdata, event.ydata]
+
+    def on_mouse_up(self, event):
+        self.mouse_press_button = -1
+
     def on_mouse_move(self, event):
         """
         Mouse movement event hadler. Stores the coordinates.
@@ -335,3 +363,5 @@ class PlotCanvas:
         """
         self.mouse = [event.xdata, event.ydata]
 
+        if self.mouse_press_button == 2:
+            self.pan_by_coords(event.xdata - self.mouse_press_pos[0], event.ydata - self.mouse_press_pos[1])