[IMP] Add diagonal lines management

printer_zpl2/models/printing_label_zpl2.py

@@ -123,6 +123,16 @@ class PrintingLabelZpl2(models.Model):
                         zpl2.ARG_COLOR: component.color,
                         zpl2.ARG_ROUNDING: component.rounding,
                     })
+            elif component.component_type == 'diagonal':
+                label_data.graphic_diagonal_line(
+                    component_offset_x, component_offset_y, {
+                        zpl2.ARG_WIDTH: component.width,
+                        zpl2.ARG_HEIGHT: component.height,
+                        zpl2.ARG_THICKNESS: component.thickness,
+                        zpl2.ARG_COLOR: component.color,
+                        zpl2.ARG_DIAGONAL_ORIENTATION:
+                        component.diagonal_orientation,
+                    })
             elif component.component_type == 'graphic':
                 image = component.graphic_image or data
                 pil_image = Image.open(io.BytesIO(

printer_zpl2/models/printing_label_zpl2_component.py

@@ -42,6 +42,7 @@ class PrintingLabelZpl2Component(models.Model):
         selection=[
             ('text', 'Text'),
             ('rectangle', 'Rectangle / Line'),
+            ('diagonal', 'Diagonal Line'),
             ('circle', 'Circle'),
             ('graphic', 'Graphic'),
             (zpl2.BARCODE_CODE_11, 'Code 11'),
@@ -85,6 +86,12 @@ class PrintingLabelZpl2Component(models.Model):
             (zpl2.ORIENTATION_BOTTOM_UP, 'Read from Bottom up'),
         ], required=True, default=zpl2.ORIENTATION_NORMAL,
         help='Orientation of the barcode.')
+    diagonal_orientation = fields.Selection(
+        selection=[
+            (zpl2.DIAGONAL_ORIENTATION_LEFT, 'Left (\\)'),
+            (zpl2.DIAGONAL_ORIENTATION_RIGHT, 'Right (/)'),
+        ], default=zpl2.DIAGONAL_ORIENTATION_LEFT,
+        help='Orientation of the diagonal line.')
     check_digits = fields.Boolean(
         help='Check if you want to compute and print the check digit.')
     height = fields.Integer(

printer_zpl2/tests/test_printing_label_zpl2.py

@@ -527,6 +527,35 @@ class TestPrintingLabelZpl2(TransactionCase):
             # Label end
             '^XZ')
 
+    def test_diagonal_line_label_contents(self):
+        """ Check contents of a diagonal line label """
+        label = self.new_label()
+        self.new_component({
+            'label_id': label.id,
+            'component_type': 'diagonal',
+        })
+        contents = label._generate_zpl2_data(self.printer).decode("utf-8")
+        self.assertEqual(
+            contents,
+            # Label start
+            '^XA\n'
+            # Print width
+            '^PW480\n'
+            # UTF-8 encoding
+            '^CI28\n'
+            # Label position
+            '^LH10,10\n'
+            # Component position
+            '^FO10,10'
+            # Component format
+            '^GD3,3,1,B,L'
+            # Component end
+            '^FS\n'
+            # Recall last saved parameters
+            '^JUR\n'
+            # Label end
+            '^XZ')
+
     def test_circle_label_contents(self):
         """ Check contents of a circle label """
         label = self.new_label()

printer_zpl2/views/printing_label_zpl2.xml

@@ -64,24 +64,25 @@
                                             <field name="sublabel_id" attrs="{'invisible': [('component_type', '!=', 'sublabel')]}"/>
                                         </group>
                                     </group>
-                                    <group attrs="{'invisible': [('component_type', 'in', ('rectangle', 'circle'))]}" string="Data">
+                                    <group attrs="{'invisible': [('component_type', 'in', ('rectangle', 'diagonal', 'circle'))]}" string="Data">
                                         <field name="data" widget="ace" options="{'mode': 'python'}" nolabel="1"/>
                                     </group>
                                     <notebook colspan="4">
                                         <page string="Format" attrs="{'invisible': [('component_type', 'in', ('sublabel', 'qr_code', 'zpl2_raw'))]}">
                                             <group>
                                                 <field name="height"/>
-                                                <field name="width" attrs="{'invisible': [('component_type', 'not in', ('text', 'rectangle', 'circle', 'graphic'))]}"/>
+                                                <field name="width" attrs="{'invisible': [('component_type', 'not in', ('text', 'rectangle', 'diagonal', 'circle', 'graphic'))]}"/>
                                                 <field name="reverse_print"/>
-                                                <field name="orientation" attrs="{'invisible': [('component_type', 'in', ('rectangle', 'circle'))]}"/>
+                                                <field name="orientation" attrs="{'invisible': [('component_type', 'in', ('rectangle', 'diagonal', 'circle'))]}"/>
                                                 <field name="font" attrs="{'invisible': [('component_type', '!=', 'text')]}"/>
                                                 <field name="in_block" attrs="{'invisible': [('component_type', '!=', 'text')]}"/>
-                                                <field name="thickness" attrs="{'invisible': [('component_type', 'not in', ('rectangle', 'circle'))]}"/>
+                                                <field name="thickness" attrs="{'invisible': [('component_type', 'not in', ('rectangle', 'diagonal', 'circle'))]}"/>
-                                                <field name="color" attrs="{'invisible': [('component_type', 'not in', ('rectangle', 'circle'))]}"/>
+                                                <field name="color" attrs="{'invisible': [('component_type', 'not in', ('rectangle', 'diagonal', 'circle'))]}"/>
+                                                <field name="diagonal_orientation" attrs="{'invisible': [('component_type', '!=', 'diagonal')], 'required': [('component_type', '=', 'diagonal')]}"/>
                                             </group>
                                         </page>
                                         <!-- Barcode specific arguments -->
-                                        <page string="Barcode Format" attrs="{'invisible': [('component_type', 'in', ('text', 'rectangle', 'circle', 'sublabel', 'graphic', 'qr_code', 'zpl2_raw'))]}">
+                                        <page string="Barcode Format" attrs="{'invisible': [('component_type', 'in', ('text', 'rectangle', 'diagonal', 'circle', 'sublabel', 'graphic', 'qr_code', 'zpl2_raw'))]}">
                                             <group>
                                                 <field name="check_digits"/>
                                                 <field name="interpretation_line"/>