Implement the audio scroll commands

Originally committed to SVN as r5693.

aegisub/src/audio_box.cpp

@@ -62,6 +62,7 @@
 #include "audio_controller.h"
 #include "audio_display.h"
 #include "audio_karaoke.h"
+#include "audio_timing.h"
 #include "command/command.h"
 #include "libresrc/libresrc.h"
 #include "main.h"
@@ -203,3 +204,12 @@ void AudioBox::ShowKaraokeBar(bool show) {
 	SetMinSize(wxSize(-1, new_height));
 	GetParent()->Layout();
 }
+
+void AudioBox::ScrollAudioBy(int pixel_amount) {
+	audioDisplay->ScrollBy(pixel_amount);
+}
+
+void AudioBox::ScrollToActiveLine() {
+	if (controller->GetTimingController())
+		audioDisplay->ScrollSampleRangeInView(controller->GetTimingController()->GetIdealVisibleSampleRange());
+}

aegisub/src/audio_box.h

@@ -89,5 +89,14 @@ public:
 
 	void ShowKaraokeBar(bool show);
 
+	/// @brief Scroll the audio display
+	/// @param pixel_amount Number of pixels to scroll the view
+	///
+	/// A positive amount moves the display to the right, making later parts of the audio visible.
+	void ScrollAudioBy(int pixel_amount);
+
+	/// Make the currently active line visible in the audio display
+	void ScrollToActiveLine();
+
 	DECLARE_EVENT_TABLE()
 };

aegisub/src/command/audio.cpp

@@ -45,6 +45,7 @@
 #include "command.h"
 
 #include "../ass_dialogue.h"
+#include "../audio_box.h"
 #include "../audio_controller.h"
 #include "../audio_karaoke.h"
 #include "../audio_timing.h"
@@ -333,15 +334,39 @@ struct audio_commit : public Command {
 };
 
 /// Scroll the audio display to the current selection
-struct audio_go_to : public Command {
+struct audio_go_to : public validate_audio_open {
 	CMD_NAME("audio/go_to")
 	STR_MENU("Go to selection")
 	STR_DISP("Go to selection")
 	STR_HELP("Go to selection")
 
 	void operator()(agi::Context *c) {
-		//if (c->audioController->GetTimingController())
+		c->audioBox->ScrollToActiveLine();
-			//audioDisplay->ScrollSampleRangeInView(c->audioController->GetTimingController()->GetIdealVisibleSampleRange());
+	}
+};
+
+/// Scroll the audio display left
+struct audio_scroll_left : public validate_audio_open {
+	CMD_NAME("audio/scroll/left")
+		STR_MENU("Scroll left")
+		STR_DISP("Scroll left")
+		STR_HELP("Scroll the audio display left")
+
+		void operator()(agi::Context *c) {
+			c->audioBox->ScrollAudioBy(-128);
+	}
+};
+
+
+/// Scroll the audio display right
+struct audio_scroll_right : public validate_audio_open {
+	CMD_NAME("audio/scroll/right")
+		STR_MENU("Scroll right")
+		STR_DISP("Scroll right")
+		STR_HELP("Scroll the audio display right")
+
+		void operator()(agi::Context *c) {
+			c->audioBox->ScrollAudioBy(128);
 	}
 };
 
@@ -475,6 +500,8 @@ namespace cmd {
 		reg(new audio_play_selection);
 		reg(new audio_play_to_end);
 		reg(new audio_save_clip);
+		reg(new audio_scroll_left);
+		reg(new audio_scroll_right);
 		reg(new audio_stop);
 		reg(new audio_toggle_spectrum);
 		reg(new audio_vertical_link);