[message_box_size] Rewrite plugin

- Much simpler code
- New config dialog

message_box_size/config_dialog.py

@@ -0,0 +1,40 @@
+from gi.repository import GObject
+from gi.repository import Gtk
+
+from gajim.gtk.settings import SettingsDialog
+from gajim.gtk.settings import SpinSetting
+from gajim.gtk.const import Setting
+from gajim.gtk.const import SettingType
+
+from gajim.plugins.plugins_i18n import _
+
+
+class MessageBoxSizeConfigDialog(SettingsDialog):
+    def __init__(self, plugin, parent):
+
+        self.plugin = plugin
+        settings = [
+            Setting('PreviewSizeSpinSetting', _('Height in pixels'),
+                    SettingType.VALUE, self.plugin.config['HEIGHT'],
+                    callback=self.on_setting, data='HEIGHT',
+                    desc=_('Size of message input in pixels'),
+                    props={'range_': (20, 200)}),
+            ]
+
+        SettingsDialog.__init__(self, parent, _('Message Box Size Configuration'),
+                                Gtk.DialogFlags.MODAL, settings, None,
+                                extend=[('PreviewSizeSpinSetting',
+                                         SizeSpinSetting)])
+
+    def on_setting(self, value, data):
+        self.plugin.config[data] = value
+
+
+class SizeSpinSetting(SpinSetting):
+
+    __gproperties__ = {
+        "setting-value": (int, 'Size', '', 20, 200, 20,
+                          GObject.ParamFlags.READWRITE), }
+
+    def __init__(self, *args, **kwargs):
+        SpinSetting.__init__(self, *args, **kwargs)