Update the size of the karaoke syllable bar when the window is resized. Updates #1516.

aegisub/src/audio_karaoke.cpp

@@ -95,7 +95,7 @@ AudioKaraoke::AudioKaraoke(wxWindow *parent, agi::Context *c)
 	split_font.SetFaceName(OPT_GET("Audio/Karaoke/Font Face")->GetString());
 	split_font.SetPointSize(OPT_GET("Audio/Karaoke/Font Size")->GetInt());
 
-	Bind(wxEVT_SIZE, bind(&AudioKaraoke::Refresh, this, false, (const wxRect*)0));
+	split_area->Bind(wxEVT_SIZE, &AudioKaraoke::OnSize, this);
 	split_area->Bind(wxEVT_PAINT, &AudioKaraoke::OnPaint, this);
 	split_area->Bind(wxEVT_LEFT_DOWN, &AudioKaraoke::OnMouse, this);
 	split_area->Bind(wxEVT_LEFT_UP, &AudioKaraoke::OnMouse, this);
@@ -153,6 +153,11 @@ void AudioKaraoke::SetEnabled(bool en) {
 	}
 }
 
+void AudioKaraoke::OnSize(wxSizeEvent &evt) {
+	RenderText();
+	Refresh(false);
+}
+
 void AudioKaraoke::OnPaint(wxPaintEvent &) {
 	int w, h;
 	split_area->GetClientSize(&w, &h);

aegisub/src/audio_karaoke.h

@@ -138,6 +138,7 @@ class AudioKaraoke : public wxWindow, private SelectionListener<AssDialogue> {
 	void OnFileChanged(int type);
 	void OnMouse(wxMouseEvent &event);
 	void OnPaint(wxPaintEvent &event);
+	void OnSize(wxSizeEvent &event);
 	void OnSelectedSetChanged(Selection const&, Selection const&) { }
 	void OnAudioOpened();
 	void OnAudioClosed();