implemented left/center/right align for text editor

git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@856 bbaffbd6-741e-11dd-a85d-61de82d9cad9

share/ui/pycam-project.ui

@@ -7573,6 +7573,9 @@ Please read the description of the Server Mode (linked below) to understand the
             <property name="position">4</property>
           </packing>
         </child>
+        <child>
+          <object class="GtkHBox" id="hbox35">
+            <property name="visible">True</property>
             <child>
               <object class="GtkLabel" id="FontDialogInputLabel">
                 <property name="visible">True</property>
@@ -7583,6 +7586,73 @@ Please read the description of the Server Mode (linked below) to understand the
               <packing>
                 <property name="expand">False</property>
                 <property name="fill">False</property>
+                <property name="position">0</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkHButtonBox" id="hbuttonbox3">
+                <property name="visible">True</property>
+                <child>
+                  <object class="GtkRadioButton" id="FontTextAlignLeft">
+                    <property name="label">gtk-justify-left</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">False</property>
+                    <property name="use_stock">True</property>
+                    <property name="active">True</property>
+                    <property name="draw_indicator">False</property>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">False</property>
+                    <property name="position">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkRadioButton" id="FontTextAlignCenter">
+                    <property name="label">gtk-justify-center</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">False</property>
+                    <property name="use_stock">True</property>
+                    <property name="active">True</property>
+                    <property name="draw_indicator">False</property>
+                    <property name="group">FontTextAlignLeft</property>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">False</property>
+                    <property name="position">1</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkRadioButton" id="FontTextAlignRight">
+                    <property name="label">gtk-justify-right</property>
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="receives_default">False</property>
+                    <property name="use_stock">True</property>
+                    <property name="active">True</property>
+                    <property name="draw_indicator">False</property>
+                    <property name="group">FontTextAlignLeft</property>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">False</property>
+                    <property name="position">2</property>
+                  </packing>
+                </child>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">False</property>
+                <property name="pack_type">end</property>
+                <property name="position">1</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
             <property name="position">5</property>
           </packing>
         </child>

src/pycam/Geometry/Letters.py

@@ -26,6 +26,10 @@ from pycam.Geometry.Model import ContourModel
 from pycam.Geometry.Line import Line
 from pycam.Geometry.Point import Point
 
+TEXT_ALIGN_LEFT = 0
+TEXT_ALIGN_CENTER = 1
+TEXT_ALIGN_RIGHT = 2
+
 
 class Letter(TransformableContainer):
     
@@ -99,16 +103,20 @@ class Charset(object):
     def get_authors(self):
         return self.authors
 
-    def render(self, text, origin=None, skew=0, line_spacing=1.0, pitch=1.0):
+    def render(self, text, origin=None, skew=0, line_spacing=1.0, pitch=1.0,
+            align=None):
         result = ContourModel()
         if origin is None:
             origin = Point(0, 0, 0)
+        if align is None:
+            align = TEXT_ALIGN_LEFT
         base = origin
         letter_spacing = self.letterspacing * pitch
         word_spacing = self.wordspacing * pitch
         line_factor = self.default_linespacing * self.linespacingfactor \
                 * line_spacing
         for line in text.splitlines():
+            current_line = ContourModel()
             line_height = self.default_height
             for character in line:
                 if character == " ":
@@ -121,7 +129,7 @@ class Charset(object):
                         new_model.append(line)
                     for polygon in new_model.get_polygons():
                         # add polygons instead of lines -> more efficient
-                        result.append(polygon)
+                        current_line.append(polygon)
                     # update line height
                     line_height = max(line_height, charset_letter.maxy())
                     # shift the base position
@@ -132,5 +140,18 @@ class Charset(object):
                     base = base.add(Point(letter_spacing, 0, 0))
             # go to the next line
             base = Point(origin.x, base.y - line_height * line_factor, origin.z)
+            if not current_line.maxx is None:
+                if align == TEXT_ALIGN_CENTER:
+                    current_line.shift(-current_line.maxx / 2, 0, 0)
+                elif align == TEXT_ALIGN_RIGHT:
+                    current_line.shift(-current_line.maxx, 0, 0)
+                else:
+                    # left align
+                    if current_line.minx != 0:
+                        current_line.shift(-current_line.minx, 0, 0)
+            for polygon in current_line.get_polygons():
+                result.append(polygon)
+        # the text should be just above the x axis
+        result.shift(0, -result.miny, 0)
         return result
 

src/pycam/Gui/Project.py

@@ -34,6 +34,8 @@ import pycam.Utils.log
 import pycam.Utils
 from pycam.Geometry.utils import sqrt
 from pycam.Gui.OpenGLTools import ModelViewWindowGL
+from pycam.Geometry.Letters import TEXT_ALIGN_LEFT, TEXT_ALIGN_CENTER, \
+        TEXT_ALIGN_RIGHT
 from pycam.Utils import ProgressCounter
 from pycam.Toolpath import Bounds
 from pycam import VERSION
@@ -380,6 +382,10 @@ class ProjectGui:
                 obj.set_value(1.0)
             obj.connect("value-changed",
                     self.update_font_dialog_preview)
+        for objname in ("FontTextAlignLeft", "FontTextAlignCenter",
+                "FontTextAlignRight"):
+            self.gui.get_object(objname).connect("toggled",
+                    self.update_font_dialog_preview)
         self._font_dialog_window_visible = False
         self._font_dialog_window_position = None
         self._fonts = None
@@ -1660,16 +1666,26 @@ class ProjectGui:
         return True
 
     def get_font_dialog_text_rendered(self):
-        text_buffer = self.gui.get_object("FontDialogInput").get_buffer()
+        input_field = self.gui.get_object("FontDialogInput")
+        text_buffer = input_field.get_buffer()
         text = text_buffer.get_text(text_buffer.get_start_iter(),
                 text_buffer.get_end_iter())
         if text:
             skew = self.gui.get_object("FontSideSkewValue").get_value()
             line_space = self.gui.get_object("FontLineSpacingValue").get_value()
             pitch = self.gui.get_object("FontCharacterSpacingValue").get_value()
+            # get the active align setting
+            for objname, value, justification in (
+                    ("FontTextAlignLeft", TEXT_ALIGN_LEFT, gtk.JUSTIFY_LEFT),
+                    ("FontTextAlignCenter", TEXT_ALIGN_CENTER, gtk.JUSTIFY_CENTER),
+                    ("FontTextAlignRight", TEXT_ALIGN_RIGHT, gtk.JUSTIFY_RIGHT)):
+                obj = self.gui.get_object(objname)
+                if obj.get_active():
+                    align = value
+                    input_field.set_justification(justification)
             font_name = self.font_selector.get_active_text()
             return self._fonts[font_name].render(text, skew=skew,
-                    line_spacing=line_space, pitch=pitch)
+                    line_spacing=line_space, pitch=pitch, align=align)
         else:
             # empty text
             return None
@@ -1696,20 +1712,28 @@ class ProjectGui:
         preview_widget = self.gui.get_object("FontDialogPreview")
         final_drawing_area = preview_widget.window
         text_model = self.get_font_dialog_text_rendered()
+        # always clean the background
+        x, y, width, height = preview_widget.get_allocation()
+        drawing_area = gtk.gdk.Pixmap(final_drawing_area, width, height)
+        drawing_area.draw_rectangle(preview_widget.get_style().white_gc, True,
+                0, 0, width, height)
         # carefully check if there are lines in the rendered text
         if text_model and (not text_model.maxx is None):
-            x, y, width, height = preview_widget.get_allocation()
-            x_fac = width / (text_model.maxx - text_model.minx)
-            y_fac = height / (text_model.maxy - text_model.miny)
-            model_base_x = text_model.minx
-            model_base_y = text_model.miny
+            x_fac = (width - 1) / (text_model.maxx - text_model.minx)
+            y_fac = (height - 1) / (text_model.maxy - text_model.miny)
             factor = min(x_fac, y_fac)
-            drawing_area = gtk.gdk.Pixmap(final_drawing_area, width, height)
-            # always clean the background
-            drawing_area.draw_rectangle(preview_widget.get_style().white_gc, True, 0, 0, width, height)
             gc = drawing_area.new_gc()
-            get_virtual_x = lambda x: int((x - model_base_x) * factor)
-            get_virtual_y = lambda y: height - int((y - model_base_y) * factor)
+            if text_model.minx == 0:
+                # left align
+                get_virtual_x = lambda x: int(x * factor)
+            elif text_model.maxx == 0:
+                # right align
+                get_virtual_x = lambda x: width + int(x * factor) - 1
+            else:
+                # center align
+                get_virtual_x = lambda x: int(width / 2.0 + x * factor) - 1
+            get_virtual_y = lambda y: \
+                    height - int((y - text_model.miny) * factor) - 1
             for polygon in text_model.get_polygons():
                 draw_points = []
                 for point in polygon.get_points():
@@ -1718,7 +1742,8 @@ class ProjectGui:
                     draw_points.append((x, y))
                 drawing_area.draw_lines(gc, draw_points)
         final_gc = final_drawing_area.new_gc()
-            final_drawing_area.draw_drawable(final_gc, drawing_area, 0, 0, 0, 0, -1, -1)
+        final_drawing_area.draw_drawable(final_gc, drawing_area, 0, 0, 0, 0,
+                -1, -1)
 
     @gui_activity_guard
     def toggle_about_window(self, widget=None, event=None, state=None):