Initial source commit

minorGems/ui/ProgressBar.cpp

@@ -0,0 +1,122 @@
+// Jason Rohrer
+// ProgressBar.cpp
+
+/**
+*
+*	ProgressBar Gui element implementation
+*
+*
+*	Created 11-6-99
+*	Mods:	
+*		Jason Rohrer	11-8-99		Changed to use GraphicBuffer object as screen buffer
+*
+*/
+
+
+
+#include "ProgressBar.h"
+
+
+ProgressBar::ProgressBar(int x, int y, int w, int h, Color bordC, Color hC, Color tipC) {
+
+	startX = x;
+	startY = y;
+	wide = w;
+	high = h;
+	
+	barWide = wide - 2*borderWide;
+	barHigh = high - 2*borderWide;
+	
+	
+	borderC = bordC;
+	highC = hC;
+	barTipC = tipC;
+	
+	
+	imageMap = new unsigned long[high * wide];
+	
+	mapYOffset = new int[high];	
+	
+	// precalc y offsets into 2d image map
+	for( int y=0; y<high; y++ ) {
+		mapYOffset[y] = y*wide;
+		}
+		
+	// prepare image map	
+	for( int y=0; y<high; y++ ) {
+		int yContrib = mapYOffset[y];
+		
+		for( int x=0; x<wide; x++ ) {
+			
+			if( y<borderWide || x<borderWide || y>high-borderWide-1 || x>wide-borderWide-1 ) {
+				imageMap[ yContrib + x ] = borderC.composite;			// border
+				}
+			else {
+				imageMap[ yContrib + x ] = 0xFF000000;			// black inside
+				}
+					
+			}
+	
+		}
+	
+	lastProgress = 0;
+	}
+	
+	
+ProgressBar::~ProgressBar() {
+	delete [] imageMap;
+	delete [] mapYOffset;
+	}
+	
+	
+void ProgressBar::setProgress(float fractionFull) {
+	
+	if( fractionFull < 0) fractionFull = 0;
+	if( fractionFull > 1) fractionFull = 1;
+	
+	if( fractionFull < lastProgress ) {		// decreasing proress, erase part of bar 
+
+		
+		int deleteXStart = (int)((fractionFull) * barWide + borderWide);
+		
+		int deleteXEnd = (int)((lastProgress) * barWide + borderWide);
+		
+		
+		for( int y=borderWide; y<high-borderWide; y++ ) {
+		
+			int yContrib = mapYOffset[y];
+			
+			for( int x=deleteXStart; x<=deleteXEnd; x++ ) {
+				imageMap[ yContrib + x ] = 0xFF000000;			// erase to black
+				}
+			// color bar tip
+			imageMap[yContrib + deleteXStart] = barTipC.composite;
+			}
+		}
+	else if( fractionFull > lastProgress) {		//progress has increased
+	
+		int addXStart = (int)((lastProgress) * barWide + borderWide);
+		int addXEnd = (int)((fractionFull) * barWide + borderWide);
+		
+		float weight = lastProgress;
+		float deltaWeight = (fractionFull - lastProgress) / (addXEnd - addXStart);
+
+		for( int x=addXStart; x<addXEnd; x++) {
+			// weighted color
+			unsigned long thisColor = highC.getWeightedComposite(weight);
+			weight += deltaWeight;
+			for( int y=borderWide; y<high-borderWide; y++) {
+				imageMap[mapYOffset[y] + x] = thisColor;
+				}
+			}
+		// color bar tip
+		for( int y=borderWide; y<high-borderWide; y++) {
+			imageMap[mapYOffset[y] + addXEnd] = barTipC.composite;
+			}
+		}
+	
+	lastProgress = fractionFull;
+	}	
+	
+
+