draw anti aliased preview of signal

src/urh/plugins/InsertSine/InsertSinePlugin.py

@@ -15,7 +15,7 @@ class InsertSinePlugin(SignalEditorPlugin):
         self.dialog_ui = uic.loadUi(os.path.realpath(os.path.join(dirname, "insert_sine_dialog.ui")))  # type: QDialog
 
         self.amplitude = 1
-        self.frequency = 1e6
+        self.frequency = 10
         self.phase = 0
         self.sample_rate = 1e6
         self.num_samples = 1e6
@@ -42,6 +42,7 @@ class InsertSinePlugin(SignalEditorPlugin):
     def show_insert_sine_dialog(self):
         self.dialog_ui.show()
         self.__create_dialog_connects()
+        self.draw_sine_wave()
 
     def draw_sine_wave(self):
         self.complex_wave = np.empty(int(self.num_samples), dtype=np.complex64)
@@ -50,6 +51,7 @@ class InsertSinePlugin(SignalEditorPlugin):
         self.complex_wave.imag = self.amplitude * np.sin(2 * np.pi * self.frequency * t + self.phase)
 
         self.dialog_ui.graphicsViewSineWave.plot_data(self.complex_wave.imag.astype(np.float32))
+        self.dialog_ui.graphicsViewSineWave.draw_full()
 
     @pyqtSlot(float)
     def on_double_spin_box_amplitude_value_changed(self, value: float):

src/urh/plugins/InsertSine/insert_sine_dialog.ui

@@ -160,7 +160,11 @@
        </item>
       </layout>
      </widget>
-     <widget class="ZoomableGraphicView" name="graphicsViewSineWave"/>
+     <widget class="ZoomableGraphicView" name="graphicsViewSineWave">
+      <property name="renderHints">
+       <set>QPainter::Antialiasing|QPainter::HighQualityAntialiasing|QPainter::TextAntialiasing</set>
+      </property>
+     </widget>
     </widget>
    </item>
   </layout>

src/urh/ui/views/ZoomableGraphicView.py

@@ -1,4 +1,5 @@
 from PyQt5.QtCore import pyqtSignal, QRectF
+from PyQt5.QtGui import QResizeEvent
 from PyQt5.QtGui import QWheelEvent
 from PyQt5.QtWidgets import QGraphicsScene
 
@@ -71,4 +72,8 @@ class ZoomableGraphicView(SelectableGraphicView):
         if self.scene_creator is not None:
             x1 = self.view_rect().x()
             x2 = x1 + self.view_rect().width()
-            self.scene_creator.show_scene_section(x1, x2)
+            self.scene_creator.show_scene_section(x1, x2)
+
+    def resizeEvent(self, event: QResizeEvent):
+        self.draw_full()
+        event.accept()