- shift+click now used for deletion of poles/zeros

src/laplace/laplace_plot.py

@@ -37,7 +37,8 @@ class pzPlot():
     mode = 'p'
     mode_types = {'Polstelle': 'p', 'Nullstelle': 'z'}
     action = 'add'
-    action_types = {'Hinzufügen / Löschen': 'add', 'Konvergenzbereich ändern': 'roc'}
+    action_locked = False
+    action_types = {'Hinzufügen': 'add', 'Löschen': 'del', 'Konvergenzbereich ändern': 'roc'}
     H = None
     Hlog = None
 
@@ -101,17 +102,25 @@ class pzPlot():
         self.ax.set_title('Pol- /Nullstellen Diagramm', fontsize='12')
 
         def onclick(event):
-            if not self.action == 'roc':
-                if event.button == 1:  # Left click
-                    self.action = 'add'
-                elif event.button == 2 or event.button == 3:  # Middle or right click
-                    self.action = 'del'
+            if self.action == 'add' and event.key == 'shift':
+                self.action = 'del'
+
             if event.inaxes != self.ax: return
             if self.filter != 'man': return
             p = event.xdata + 1j * event.ydata
             self.update_point(p, self.mode)
 
+        def onkeypress(event):
+            self.action_locked = True if self.action == 'del' else False
+            self.w_action_type.children[0].value = 'Löschen'
+
+        def onkeyrelease(event):
+            if not self.action_locked:
+                self.w_action_type.children[0].value = 'Hinzufügen'
+
         self.fig.canvas.mpl_connect('button_press_event', onclick)
+        self.fig.canvas.mpl_connect('key_press_event', onkeypress)
+        self.fig.canvas.mpl_connect('key_release_event', onkeyrelease)
 
         self.handles['axh'] = plt.subplot(gs[0, 1])
         self.handles['axh'].set_title('Impulsantwort', fontsize='12')
@@ -139,7 +148,7 @@ class pzPlot():
         
         # Widgets
         self.w_filter_type = interactive(self.update_filter,filtr=widgets.Dropdown(options=list(self.filter_types.keys()), value="Sprungfunktion", description='Filter'))
-        self.w_action_type = interactive(self.update_action,action=widgets.Dropdown(options=list(self.action_types.keys()),value="Hinzufügen / Löschen", description='Modus', disabled=True))
+        self.w_action_type = interactive(self.update_action,action=widgets.Dropdown(options=list(self.action_types.keys()),value="Hinzufügen", description='Modus', disabled=True))
         self.w_point_type = interactive(self.update_mode,mode=widgets.Dropdown(options=list(self.mode_types.keys()), value="Polstelle", description='Typ', disabled=True))
         self.w_amp_type = interactive(self.update_amp, H0=widgets.IntSlider(min=1,max=10,step=1,value=1), description="H0")
         self.w_no_of_poles = interactive(self.update_no_of_poles, P=widgets.IntSlider(min=1,max=7,step=1,value=1), description="P")