[BPMDisplay] Added SetFromSteps Lua binding.

Docs/Changelog_sm5.txt

@@ -5,10 +5,15 @@ from StepMania 4 alpha 5 to sm-ssc v1.2.5, see Changelog_sm-ssc.txt.
 ________________________________________________________________________________
 
 ================================================================================
-StepMania 5.0 ????????? | 20110???
+StepMania 5.0 Preview 2 | 20110???
 --------------------------------------------------------------------------------
 
-2011/05/31
+2011/06/02
+----------
+* [BPMDisplay] Added SetFromSteps Lua binding. [AJ]
+
+2011/06/01
+----------
 * [TimingData] Added the HasScrollChanges lua binding. [Wolfman2000]
 
 2011/05/31
@@ -16,6 +21,7 @@ StepMania 5.0 ????????? | 20110???
 * [Player] Added the BattleRaveMirror metric. This determines if Battle and
   Rave mode will have the two players with mirrored charts or not. By default,
   this is set to true, preserving the ITG style behavior. [Wolfman2000]
+* [TimingData] Added the HasScrollChanges lua binding. [Wolfman2000]
 
 ================================================================================
 StepMania 5.0 Preview 1 | 20110529

Docs/Luadoc/LuaDocumentation.xml

@@ -1273,6 +1273,9 @@
 	<Function name='SetFromSong' sm-ssc='true' return='void' arguments='Song s'>
 		Sets the BPMDisplay from the specified Song.
 	</Function>
+	<Function name='SetFromSteps' sm-ssc='true' return='void' arguments='Steps s'>
+		Sets the BPMDisplay from the specified Steps.
+	</Function>
 </Class>
 <Class name='Character'>
 	<Function name='GetCardPath' return='string' arguments=''>

src/BPMDisplay.cpp

@@ -9,6 +9,7 @@
 #include "CommonMetrics.h"
 #include "LocalizedString.h"
 #include "Song.h"
+#include "Steps.h"
 
 #include <limits.h>
 
@@ -198,6 +199,17 @@ void BPMDisplay::SetBpmFromSong( const Song* pSong )
 	}
 }
 
+void BPMDisplay::SetBpmFromSteps( const Steps* pSteps )
+{
+	ASSERT( pSteps );
+	DisplayBpms bpms;
+	float fMinBPM, fMaxBPM;
+	pSteps->m_Timing.GetActualBPM( fMinBPM, fMaxBPM );
+	bpms.Add( fMinBPM );
+	bpms.Add( fMaxBPM );
+	m_fCycleTime = 1.0f;
+}
+
 void BPMDisplay::SetBpmFromCourse( const Course* pCourse )
 {
 	ASSERT( pCourse );
@@ -307,6 +319,16 @@ public:
 		}
 		return 0;
 	}
+	static int SetFromSteps( T* p, lua_State *L )
+	{
+		if( lua_isnil(L,1) ) { p->NoBPM(); }
+		else
+		{
+			const Steps* pSteps = Luna<Steps>::check( L, 1, true );
+			p->SetBpmFromSteps(pSteps);
+		}
+		return 0;
+	}
 	static int SetFromCourse( T* p, lua_State *L )
 	{
 		if( lua_isnil(L,1) ) { p->NoBPM(); }
@@ -323,6 +345,7 @@ public:
 	{
 		ADD_METHOD( SetFromGameState );
 		ADD_METHOD( SetFromSong );
+		ADD_METHOD( SetFromSteps );
 		ADD_METHOD( SetFromCourse );
 		ADD_METHOD( GetText );
 	}

src/BPMDisplay.h

@@ -6,6 +6,7 @@
 #include "ThemeMetric.h"
 #include "LocalizedString.h"
 class Song;
+class Steps;
 class Course;
 struct DisplayBpms;
 
@@ -30,6 +31,11 @@ public:
 	 * @param pSong the song in question.
 	 */
 	void SetBpmFromSong( const Song* pSong );
+	/**
+	 * @brief Use the BPM[s] from a steps.
+	 * @param pSteps the steps in question.
+	 */
+	void SetBpmFromSteps( const Steps* pSteps );
 	/**
 	 * @brief Use the BPM[s] from a course.
 	 * @param pCourse the course in question.