Alt+Left/Right on the video seek bar will now seek by increments of 10 frames (increment is customizeable in config.dat)

Originally committed to SVN as r83.

core/changelog.txt

@@ -31,6 +31,7 @@ Please visit http://aegisub.net to download latest version
 - Fixed some bugs related to inserting overrides via the buttons over the edit box (AMZ)
 - Implemented Redo (AMZ)
 - Fonts collector will now default collection to same folder as script (Set to "?script" on config.dat) (AMZ)
+- Alt+Left/Right on the video seek bar will now seek by increments of 10 frames (increment is customizeable in config.dat) (AMZ)
 
 
 = 1.09 beta - 2006.01.16 ===========================

core/options.cpp

@@ -125,6 +125,7 @@ void OptionsManager::LoadDefaults() {
 	SetText(_T("Video resizer"),_T("BilinearResize"));
 	SetInt(_T("Video Check Script Res"), 0);
 	SetInt(_T("Video Default Zoom"), 7);
+	SetInt(_T("Video Fast Jump Step"), 10);
 
 	SetInt(_T("Audio Cache"),1);
 	SetInt(_T("Audio Sample Rate"),0);

core/video_slider.cpp

@@ -45,6 +45,7 @@
 #include "vfr.h"
 #include "subs_edit_box.h"
 #include "options.h"
+#include "utils.h"
 
 
 ///////////////
@@ -263,6 +264,14 @@ void VideoSlider::OnKeyDown(wxKeyEvent &event) {
 			return;
 		}
 
+		// Fast move
+		if (!ctrl && !shift && alt) {
+			if (Display->IsPlaying) return;
+			int target = MID(min,GetValue() + direction * Options.AsInt(_T("Video Fast Jump Step")),max);
+			if (target != GetValue()) Display->JumpToFrame(target);
+			return;
+		}
+
 		// Boundaries
 		if (ctrl && !shift && !alt) {
 			// Prepare