add font description to font selector dropdown

1 files changed, 85 insertions, 0 deletions

diff --git a/lib/gui/subtitle_combo_box.py b/lib/gui/subtitle_combo_box.py
new file mode 100644
index 00000000..64c42153
--- /dev/null
+++ b/lib/gui/subtitle_combo_box.py
@@ -0,0 +1,85 @@
+import wx
+import wx.adv
+from wx.lib.wordwrap import wordwrap
+
+
+class SubtitleComboBox(wx.adv.OwnerDrawnComboBox):
+    TITLE_FONT_SIZE = 12
+    SUBTITLE_FONT_SIZE = 10
+
+    # I'd love to make this 12 too, but if I do it seems to get drawn as 10
+    # initially no matter what I do.
+    CONTROL_FONT_SIZE = 12
+
+    MARGIN = 5
+
+    def __init__(self, *args, **kwargs):
+        self.titles = kwargs.get('choices', [])
+        subtitles = kwargs.pop('subtitles', {})
+        self.subtitles = [subtitles.get(title, '') for title in self.titles]
+        wx.adv.OwnerDrawnComboBox.__init__(self, *args, **kwargs)
+
+        self.control_font = wx.Font(pointSize=self.CONTROL_FONT_SIZE, family=wx.DEFAULT, style=wx.NORMAL, weight=wx.NORMAL)
+        self.title_font = wx.Font(pointSize=self.TITLE_FONT_SIZE, family=wx.DEFAULT, style=wx.NORMAL, weight=wx.NORMAL)
+        self.subtitle_font = wx.Font(pointSize=self.SUBTITLE_FONT_SIZE, family=wx.DEFAULT, style=wx.NORMAL, weight=wx.NORMAL)
+
+    def OnMeasureItemWidth(self, item):
+        # This _should_ allow us to set the width of the combobox to match the
+        # width of the widest title.  In reality, this method is never called
+        # and I can't figure out why.  We just use self.GetSize().GetWidth()
+        # instead and rely on the parent window to size us appropriately.  Ugh.
+
+        title = self.titles[item]
+
+        # technique from https://stackoverflow.com/a/23529463/4249120
+        dc = wx.ScreenDC()
+        dc.SetFont(self.title_font)
+
+        return dc.GetTextExtent(title).GetWidth() + 2 * self.MARGIN
+
+    def OnMeasureItem(self, item):
+        title = self.titles[item]
+        subtitle = self.subtitles[item]
+
+        dc = wx.ScreenDC()
+        dc.SetFont(self.subtitle_font)
+        wrapped = wordwrap(subtitle, self.GetSize().GetWidth(), dc)
+        subtitle_height = dc.GetTextExtent(wrapped).GetHeight()
+
+        dc = wx.ScreenDC()
+        dc.SetFont(self.title_font)
+        title_height = dc.GetTextExtent(title).GetHeight()
+
+        return subtitle_height + title_height + 3 * self.MARGIN
+
+    def OnDrawBackground(self, dc, rect, item, flags):
+        if flags & wx.adv.ODCB_PAINTING_SELECTED:
+            # let the parent class draw the selected item so we don't
+            # hae to figure out the highlight color
+            wx.adv.OwnerDrawnComboBox.OnDrawBackground(self, dc, rect, item, flags)
+        else:
+            # alternate white and grey for the dropdown items, and draw the
+            # combo box itself as white
+            if flags & wx.adv.ODCB_PAINTING_CONTROL or item % 2 == 0:
+                background_color = wx.Colour(255, 255, 255)
+            else:
+                background_color = wx.Colour(240, 240, 240)
+
+            dc.SetBrush(wx.Brush(background_color))
+            dc.SetPen(wx.Pen(background_color))
+            dc.DrawRectangle(rect)
+
+    def OnDrawItem(self, dc, rect, item, flags):
+        if flags & wx.adv.ODCB_PAINTING_CONTROL:
+            # painting the selected item in the box
+            dc.SetFont(self.control_font)
+            dc.DrawText(self.titles[item], rect.x + self.MARGIN, rect.y + self.MARGIN)
+        else:
+            # painting the items in the popup
+            dc.SetFont(self.title_font)
+            title_height = dc.GetCharHeight()
+            dc.DrawText(self.titles[item], rect.x + self.MARGIN, rect.y + self.MARGIN)
+
+            dc.SetFont(self.subtitle_font)
+            subtitle = wordwrap(self.subtitles[item], self.GetSize().GetWidth(), dc)
+            dc.DrawText(subtitle, rect.x + self.MARGIN, rect.y + title_height + self.MARGIN * 2)