applied minimums to values computations

implemented SetLimitsFor() and GetLimitsFor()


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20391 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/ChannelControl.cpp

@@ -439,7 +439,19 @@ status_t
 BChannelControl::SetLimitsFor(int32 fromChannel, int32 channelCount,
 	const int32 *minimum, const int32 *maximum)
 {
-	return B_ERROR;
+	if (fromChannel + channelCount > CountChannels())
+		channelCount = CountChannels() - fromChannel;
+	for (int i=0; i<channelCount; i++) {
+		if (minimum[i] > maximum[i])
+			return B_BAD_VALUE;
+		fChannelMin[fromChannel + i] = minimum[i];
+		fChannelMax[fromChannel + i] = maximum[i];
+		if (fChannelValues[fromChannel + i] < minimum[i])
+			fChannelValues[fromChannel + i] = minimum[i];
+		else if (fChannelValues[fromChannel + i] > maximum[i])
+			fChannelValues[fromChannel + i] = maximum[i];
+	}
+	return B_OK;
 }
 
 
@@ -447,7 +459,19 @@ status_t
 BChannelControl::GetLimitsFor(int32 fromChannel, int32 channelCount,
 	int32 *minimum, int32 *maximum) const
 {
-	return B_ERROR;
+	if (minimum == NULL || maximum == NULL)
+		return B_BAD_VALUE;
+
+	if (fChannelMin == NULL || fChannelMax == NULL)
+		return B_ERROR;
+	if (fromChannel + channelCount > CountChannels())
+		channelCount = CountChannels() - fromChannel;
+	for (int i=0; i<channelCount; i++) {
+		minimum[i] = fChannelMin[fromChannel + i];
+		maximum[i] = fChannelMax[fromChannel + i];
+	}
+	
+	return B_OK;
 }
 
 

src/kits/interface/ChannelSlider.cpp

@@ -573,7 +573,7 @@ BChannelSlider::ThumbDeltaFor(int32 channel)
 	if (channel >= 0 && channel < MaxChannelCount()) {
 		float range = ThumbRangeFor(channel);
 		int32 limitRange = MaxLimitList()[channel] - MinLimitList()[channel];
-		delta = ValueList()[channel] * range / limitRange;  
+		delta = (ValueList()[channel] - MinLimitList()[channel]) * range / limitRange;  
 			
 		if (Vertical())
 			delta = range - delta;
@@ -814,7 +814,7 @@ BChannelSlider::MouseMovedCommon(BPoint point, BPoint point2)
 	else
 		floatValue = range + (point.x - fMinpoint);
 	
-	int32 value = (int32)(floatValue / range * limitRange);
+	int32 value = (int32)(floatValue / range * limitRange) + MinLimitList()[fCurrentChannel];
 	if (fAllChannels)
 		SetAllValue(value);
 	else