Merge pull request #31 from inventree/print-copies

Add printing options framework

Author: SchrodingersGat

inventree_brother/brother_plugin.py

@@ -13,6 +13,9 @@
 # translation
 from django.utils.translation import ugettext_lazy as _
 
+# printing options
+from rest_framework import serializers
+
 from inventree_brother.version import BROTHER_PLUGIN_VERSION
 
 # InvenTree plugin libs
@@ -47,6 +50,19 @@ def get_rotation_choices():
     return [(f"{degree}", f"{degree}°") for degree in [0, 90, 180, 270]]
 
 
+class BrotherLabelSerializer(serializers.Serializer):
+    """Custom serializer class for BrotherLabelPlugin.
+
+    Used to specify printing parameters at runtime
+    """
+
+    copies = serializers.IntegerField(
+        default=1,
+        label=_('Copies'),
+        help_text=_('Number of copies to print'),
+    )
+
+
 class BrotherLabelPlugin(LabelPrintingMixin, SettingsMixin, InvenTreePlugin):
 
     AUTHOR = "Oliver Walters"
@@ -57,6 +73,8 @@ class BrotherLabelPlugin(LabelPrintingMixin, SettingsMixin, InvenTreePlugin):
     SLUG = "brother"
     TITLE = "Brother Label Printer"
 
+    PrintingOptionsSerializer = BrotherLabelSerializer
+
     # Use background printing
     BLOCKING_PRINT = False
 
@@ -120,6 +138,11 @@ def print_label(self, **kwargs):
         # ^ currently this width and height are those of the label template (before conversion to PDF
         # and PNG) and are of little use
 
+        # Printing options requires a modern-ish InvenTree backend,
+        # which supports the 'printing_options' keyword argument
+        options = kwargs.get('printing_options', {})
+        n_copies = int(options.get('copies', 1))
+
         # Look for png data in kwargs (if provided)
         label_image = kwargs.get('png_file', None)
 
@@ -184,9 +207,10 @@ def print_label(self, **kwargs):
 
         instructions = convert(**params)
 
-        send(
-            instructions=instructions,
-            printer_identifier=f'tcp://{ip_address}',
-            backend_identifier='network',
-            blocking=True
-        )
+        for _i in range(n_copies):
+            send(
+                instructions=instructions,
+                printer_identifier=f'tcp://{ip_address}',
+                backend_identifier='network',
+                blocking=True
+            )

inventree_brother/version.py

@@ -1,3 +1,3 @@
 """Version information for the plugin"""
 
-BROTHER_PLUGIN_VERSION = "0.7.2"
+BROTHER_PLUGIN_VERSION = "0.8.0"