Features/GTK3/Porting/Typing Turtle: Difference between revisions

← Older edit

@@ Line 7: / Line 7: @@
 = Port to Cairo =
-'''README''': before to port this activity to GTK3, we should port it to Cairo as the first step and then move to GTK3.
+'''README''': before to port this activity to GTK3, we should port it to Cairo as the first step and then move to GTK3. Here is the [http://bugs.sugarlabs.org/attachment/ticket/3772/0001-Port-to-Cairo.2.patch PATCH]
 == Code Snippets ==
@@ Line 108: / Line 108: @@
   cr.paint()
-= Code Snippets =
+==== Gtk3 version ====
+ Gdk.cairo_set_source_pixbuf(cr, self.backgroundpixbuf, 0, 0)
+ cr.rectangle(x, 0, self.backgroundpixbuf.get_width(),
+              self.backgroundpixbuf.get_height())
+ cr.paint()
+= Port to Gtk3 -> Code Snippets =
 == Gtk.TextBuffer ==
@@ Line 182: / Line 189: @@
   Gdk.EventType.KEY_RELEASE
-----
+== Gdk.Keymap.translate_keyboard_state ==
 * http://developer.gnome.org/gdk/stable/gdk-Keyboard-Handling.html#gdk-keymap-translate-keyboard-state
 * http://www.pygtk.org/docs/pygtk/class-gdkkeymap.html#method-gdkkeymap--translate-keyboard-state
-----
+Old way:
+ t = self.keymap.translate_keyboard_state(key['key-scan'], self.active_state, self.active_group)
+New way:
+ success, keyval, effective_group, level, consumed_modifiers = \
+     self.keymap.translate_keyboard_state(key['key-scan'], self.active_state,
+                                          self.active_group)
+== 'expose-event' & 'draw' event ==
+The new ''draw'' event that refers to the old ''expose-event'' into a Gtk.DrawingArea now receive the widget and the context instead the widget and the event:
+''expose-event''
+ def expose_cb(self, area, event):
+     self.draw()
+''draw'' event
-  -    def expose_cb(self, area, event):
+  def draw_cb(self, area, cr):
- -        self.draw()
+     self.draw(cr)
- +    def draw_cb(self, area, cr):
- +        self.draw(cr)
 = Notes =
@@ Line 200: / Line 224: @@
   # Hack to get the current modifier state - which will not be represented by the event.
   state = gtk.gdk.device_get_core_pointer().get_state(self.window)[1]
+* I used a HACK related to Pango fonts and DPI:
+<pre>
+ # Set correct DPI for Rsvg and Screen
+ from gi.repository import PangoCairo
+ def _get_screen_dpi():
+     xft_dpi = Gtk.Settings.get_default().get_property('gtk-xft-dpi')
+     dpi = float(xft_dpi / 1024)
+     logging.debug('Setting dpi to: %f', dpi)
+     # HACK: if the DPI detected is 200.0 it seems we are on an XO, so
+     # we return 133 because the XO manage its resolution in a complex
+     # way. More information here:
+     #     http://wiki.laptop.org/go/Display
+     if 200 == int(dpi):
+         return 133
+     return dpi
+ dpi = _get_screen_dpi()
+ font_map_default = PangoCairo.font_map_get_default()
+ font_map_default.set_resolution(dpi)
+</pre>
 = Missing / problematic things =
@@ Line 205: / Line 253: @@
 * [<span style="color: green;">SOLVED</span>] <del>This method, ''set_source_pixbuf'', is not available.</del>
- cr = self.get_window().cairo_create()
+* [<span style="color: green;">SOLVED</span>] <del>We should find the correct way to scale Left and Right hands that are drawn over the keyboard, because I just put values that I thought they were correct. We should calculate them according to the screen</del>
- # README: http://developer.gnome.org/gdk/stable/gdk-Cairo-Interaction.html#gdk-cairo-set-source-pixbuf
- # Although this methos is not available in Python
- cr.set_source_pixbuf(self.backgroundpixbuf, 0, 0)
- Gdk.cairo_set_source_pixbuf(cr, self.backgroundpixbuf, 0, 0)
-* We should find the correct way to scale Left and Right hands that are drawn over the keyboard, because I just put values that I thought they were correct. We should calculate them according to the screen
+* [<span style="color: green;">SOLVED</span>] <del>PangoCairo fonts are not being drawn because of this: https://bugzilla.gnome.org/show_bug.cgi?id=680680</del>
-* PangoCairo fonts are not being drawn because of this: https://bugzilla.gnome.org/show_bug.cgi?id=680680
+* [<span style="color: green;">SOLVED</span>] <del>Font Scale is wrong: https://bugzilla.gnome.org/show_bug.cgi?id=680663</del>
-* Font Scale is wrong: https://bugzilla.gnome.org/show_bug.cgi?id=680663
+* SHIFT and ALT GR keys do not show the correct keys
 = Useful links =