Rudimentary interactivity for printing and other gui-based postprocessing

photobooth/Photobooth.py

@@ -141,7 +141,8 @@ class Photobooth:
                     self.recvAck()
 
         except TeardownException:
-            return -1
+            self.teardown()
+            return 123
         
 
     def setCameraActive(self):

photobooth/gui/GuiPostprocess.py

@@ -1,10 +1,11 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
+from PyQt5.QtWidgets import QMessageBox
+
 from .. import printer
 from ..util import lookup_and_import
-
+from .GuiState import PrintState
-from PyQt5.QtWidgets import QMessageBox
 
 class GuiPostprocess:
 
@@ -13,7 +14,7 @@ class GuiPostprocess:
         assert not kwargs
 
 
-    def do(self, parent, picture):
+    def get(self, picture):
 
         raise NotImplementedError()
 
@@ -30,11 +31,19 @@ class PrintPostprocess(GuiPostprocess):
         self._printer = Printer(page_size, True)
 
 
-    def do(self, parent, picture):
+    def get(self, picture):
 
-        reply = QMessageBox.question(parent, 'Print?', 
+        return PrintState(lambda : self.do(picture))
-            'Do you want to print the picture?', 
-            QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
 
-        if reply == QMessageBox.Yes:
+        # reply = QMessageBox.question(parent, 'Print?', 
-            self._printer.print(picture)
+        #     'Do you want to print the picture?', 
+        #     QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
+
+        # if reply == QMessageBox.Yes:
+        #     self._printer.print(picture)
+
+
+    def do(self, picture):
+
+        print('Printing')
+        self._printer.print(picture)

photobooth/gui/GuiState.py

@@ -51,7 +51,6 @@ class IdleState(GuiState):
         super().__init__(**kwargs)
 
 
-
 class PictureState(GuiState):
 
     def __init__(self, picture, **kwargs):
@@ -97,7 +96,6 @@ class MessageState(GuiState):
         self._msg = message
 
 
-
 class TriggerState(GuiState):
 
     def __init__(self, **kwargs):
@@ -139,8 +137,33 @@ class PreviewState(PictureState):
 
         super().__init__(**kwargs)
 
+
 class TeardownState(GuiState):
 
     def __init__(self, **kwargs):
 
         super().__init__(**kwargs)
+
+
+class PrintState(GuiState):
+
+    def __init__(self, handler, **kwargs):
+
+        super().__init__(**kwargs)
+
+        self.handler = handler
+
+
+    @property
+    def handler(self):
+
+        return self._handler
+
+
+    @handler.setter
+    def handler(self, handler):
+
+        if not callable(handler):
+            raise ValueError('handler must be callable')
+
+        self._handler = handler

photobooth/gui/PyQt5Gui.py

@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 
 import multiprocessing as mp
+import queue
 
 from PIL import ImageQt
 
@@ -10,7 +11,7 @@ from PyQt5.QtWidgets import (QApplication, QCheckBox, QComboBox, QFormLayout, QF
 from PyQt5.QtGui import QImage, QPainter, QPixmap
 
 import math
-from PyQt5.QtGui import QBrush, QPen, QColor
+from PyQt5.QtGui import QBrush, QPen, QColor, QFont
 from PyQt5.QtCore import QRect
 
 from .PyQt5GuiHelpers import QRoundProgressBar
@@ -35,6 +36,7 @@ class PyQt5Gui(Gui):
         self._lastState = self.showStart
         
         self._postprocessList = []
+        self._postprocessQueue = queue.Queue()
 
         if cfg.getBool('Printer', 'enable'):
             self._postprocessList.append( PrintPostprocess( cfg.get('Printer', 'module'),
@@ -143,8 +145,6 @@ class PyQt5Gui(Gui):
             QTimer.singleShot(cfg.getInt('Photobooth', 'display_time') * 1000, 
                 lambda : self.postprocessPicture(state.picture))
 
-            # self._printer.print(state.picture)
-
         elif isinstance(state, TeardownState):
             self._conn.send('teardown')
             self.showStart()
@@ -159,9 +159,28 @@ class PyQt5Gui(Gui):
     def postprocessPicture(self, picture):
 
         for task in self._postprocessList:
-            task.do(self._p, picture)
+            self._postprocessQueue.put(task.get(picture))
-        
+
-        self.sendAck()
+        self.handleQueue()
+
+
+    def handleQueue(self):
+
+        while True:
+            try:
+                task = self._postprocessQueue.get(block = False)
+            except queue.Empty:
+                self.sendAck()
+                break
+            else:
+                if isinstance(task, PrintState):
+                    reply = QMessageBox.question(self._p, 'Print picture?', 
+                        'Do you want to print the picture?', 
+                        QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
+                    if reply == QMessageBox.Yes:
+                        task.handler()
+                else:
+                    raise ValueError('Unknown task')
 
 
     def showStart(self):
@@ -625,7 +644,7 @@ class PyQt5WaitMessage(QFrame):
 
     def initFrame(self):
 
-        self.setStyleSheet('background-color: white;')
+        self.setStyleSheet('background-color: black; color: white;')
 
 
     def paintEvent(self, event):
@@ -677,7 +696,7 @@ class PyQt5CountdownMessage(QFrame):
         
         super().__init__()
 
-        self._step_size = 100
+        self._step_size = 50
         self._counter = time * (1000 // self._step_size)
         self._action = action
         self._picture = None
@@ -688,7 +707,7 @@ class PyQt5CountdownMessage(QFrame):
 
     def initFrame(self):
 
-        self.setStyleSheet('background-color: white;')
+        self.setStyleSheet('background-color: black; color: white;')
 
 
     def initProgressBar(self, time):
@@ -744,7 +763,6 @@ class PyQt5CountdownMessage(QFrame):
                        (self.height() - pix.height()) // 2 )
             painter.drawPixmap(QPoint(*origin), pix)
 
-        # painter.drawText(event.rect(), Qt.AlignCenter, str(self.counter))
         painter.end()
 
         offset = ( (self.width() - self._bar.width()) // 2, 
@@ -783,7 +801,7 @@ class PyQt5PictureMessage(QFrame):
 
     def initFrame(self):
 
-        self.setStyleSheet('background-color: white;')
+        self.setStyleSheet('background-color: black; color: white')
 
 
     def paintEvent(self, event):
@@ -803,3 +821,4 @@ class PyQt5PictureMessage(QFrame):
 
         painter.drawText(event.rect(), Qt.AlignCenter, self._message)
         painter.end()
+

photobooth/main.py

@@ -58,7 +58,7 @@ class CameraProcess(mp.Process):
                 continue
 
             status_code = self.run_camera()
-            print('Camera exit')
+            print('Camera exit: ', str(status_code))
 
         sys.exit(status_code)