Use generic datatype-based columns in GlyphDBEdit.

pixelocr/gui/glyphdbedit.py

@@ -33,82 +33,52 @@ from ..image import Image
 
 
 class Column(object):
-    header = None
+    flags = Qt.ItemIsEditable
+    data_type = str
 
-    def data(self, glyph_data):
-        return None
+    def __init__(self, header, field_name, image_field_name=None):
+        self.header = header
+        self.field_name = field_name
+        self.image_field_name=image_field_name
 
-    def set_data(self, glyph_data, value):
-        raise NotImplementedError
+    def data(self, glyph_data, role):
+        if role in [Qt.DisplayRole, Qt.EditRole]:
+            return self.data_type(getattr(glyph_data, self.field_name))
+        elif role == Qt.DecorationRole and self.image_field_name:
+            return getattr(glyph_data, self.image_field_name).qimage
 
-    def image(self, glyph_data):
-        return None
-
-    def checkState(self, glyph_data):
-        return None
+    def setData(self, glyph_data, value, role):
+        if role == Qt.EditRole:
+            setattr(glyph_data, self.field_name, self.data_type(value))
 
     def sortKey(self, glyph_data):
-        return self.data(glyph_data)
+        return getattr(glyph_data, self.field_name)
 
 
-class TextColumn(Column):
-    header = 'Text'
-
-    def data(self, glyph_data):
-        return glyph_data.text
-
-    def setData(self, glyph_data, value):
-        glyph_data.text = value
-
-    def image(self, glyph_data):
-        return glyph_data.image.qimage
+class IntColumn(Column):
+    data_type = int
 
 
-class ElevationColumn(Column):
-    header = 'Elevation'
+class CheckBoxColumn(Column):
+    flags = Qt.ItemIsUserCheckable
+    data_type = bool
 
-    def data(self, glyph_data):
-        return str(glyph_data.elevation)
+    def data(self, glyph_data, role):
+        if role == Qt.CheckStateRole:
+            value = getattr(glyph_data, self.field_name)
+            return Qt.Checked if value else Qt.Unchecked
 
-    def sortKey(self, glyph_data):
-        return glyph_data.elevation
-
-    def setData(self, glyph_data, value):
-        glyph_data.elevation = value
-
-
-class BoldColumn(Column):
-    header = 'Bold'
-
-    def sortKey(self, glyph_data):
-        return glyph_data.bold
-
-    def checkState(self, glyph_data):
-        return Qt.Checked if glyph_data.bold else Qt.Unchecked
-
-    def setData(self, glyph_data, value):
-        glyph_data.bold = value
-
-
-class ItalicColumn(Column):
-    header = 'Italic'
-
-    def sortKey(self, glyph_data):
-        return glyph_data.italic
-
-    def checkState(self, glyph_data):
-        return Qt.Checked if glyph_data.italic else Qt.Unchecked
-
-    def setData(self, glyph_data, value):
-        glyph_data.italic = value
+    def setData(self, glyph_data, value, role):
+        if role == Qt.CheckStateRole:
+            setattr(glyph_data, self.field_name, value == Qt.Checked)
 
 
 class GlyphDBModel(QAbstractTableModel):
     COLUMNS = [
-        TextColumn(),
-        ElevationColumn(),
-        BoldColumn(),
-        ItalicColumn(),
+        Column('Text', 'text', 'image'),
+        IntColumn('Elevation', 'elevation'),
+        CheckBoxColumn('Bold', 'bold'),
+        CheckBoxColumn('Italic', 'italic'),
     ]
 
     def __init__(self, glyphdb, parent=None):
@@ -119,7 +89,8 @@ class GlyphDBModel(QAbstractTableModel):
         self.updateData()
 
     def flags(self, index):
-        return super().flags(index) | Qt.ItemIsEditable | Qt.ItemIsUserCheckable
+        column = self.COLUMNS[index.column()]
+        return super().flags(index) | column.flags
 
     def rowCount(self, parent):
         return len(self.values)
@@ -133,24 +104,13 @@ class GlyphDBModel(QAbstractTableModel):
 
     def data(self, index, role):
         column = self.COLUMNS[index.column()]
-        data = self.values[index.row()]
-        if role == Qt.DisplayRole:
-            return column.data(data)
-        elif role == Qt.DecorationRole:
-            return column.image(data)
-        elif role == Qt.EditRole:
-            return column.data(data)
-        elif role == Qt.CheckStateRole:
-            return column.checkState(data)
+        glyph_data = self.values[index.row()]
+        return column.data(glyph_data, role)
 
     def setData(self, index, value, role):
-        glyph_data = self.values[index.row()]
         column = self.COLUMNS[index.column()]
-        if role == Qt.EditRole:
-            column.setData(glyph_data, value)
-        if role == Qt.CheckStateRole:
-            column.setData(glyph_data, value == Qt.Checked)
-        self.dataChanged.emit(index, index)
+        glyph_data = self.values[index.row()]
+        column.setData(glyph_data, value, role)
         return True
 
     def removeRows(self, row, count, parent=None):