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POKeeping the y-axis fixed at place?
 

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  1. POKeeping the y-axis fixed at place?
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    <p>this is the code in the continuation of this question....<a href="https://stackoverflow.com/questions/1892544/allow-horizontal-scrolling-only-in-the-core-plot-barchart">Allow horizontal scrolling only in the core-plot barchart?</a></p> <pre><code>-(BOOL)pointingDeviceDraggedAtPoint:(CGPoint)interactionPoint { if ( !self.allowsUserInteraction || !self.graph.plotArea ) { return NO; } CGPoint pointInPlotArea = [self.graph.plotArea convertPoint:interactionPoint toLayer:self.graph.plotArea]; if ( isDragging ) { pointInPlotArea.y = lastDragPoint.y;//-- Madhup Changed it for allwoing scrolling only in horizontal direction --// //-- Madhup Changed it for allwoing scrolling only in horizontal direction --// //CGPoint displacement = CGPointMake(pointInPlotArea.x-lastDragPoint.x, pointInPlotArea.y-lastDragPoint.y); CGPoint displacement = CGPointMake(pointInPlotArea.x-lastDragPoint.x, 0); //--******************************--// CGPoint pointToUse = pointInPlotArea; // Allow delegate to override if ( [self.delegate respondsToSelector:@selector(plotSpace:willDisplaceBy:)] ) { displacement = [self.delegate plotSpace:self willDisplaceBy:displacement]; pointToUse = CGPointMake(lastDragPoint.x+displacement.x, lastDragPoint.y+displacement.y); } NSDecimal lastPoint[2], newPoint[2]; [self plotPoint:lastPoint forPlotAreaViewPoint:lastDragPoint]; [self plotPoint:newPoint forPlotAreaViewPoint:pointToUse]; CPPlotRange *newRangeX = [[self.xRange copy] autorelease]; CPPlotRange *newRangeY = [[self.yRange copy] autorelease]; NSDecimal shiftX = CPDecimalSubtract(lastPoint[0], newPoint[0]); NSDecimal shiftY = CPDecimalSubtract(lastPoint[1], newPoint[1]); newRangeX.location = CPDecimalAdd(newRangeX.location, shiftX); newRangeY.location = CPDecimalAdd(newRangeY.location, shiftY); // Delegate override if ( [self.delegate respondsToSelector:@selector(plotSpace:willChangePlotRangeTo:forCoordinate:)] ) { newRangeX = [self.delegate plotSpace:self willChangePlotRangeTo:newRangeX forCoordinate:CPCoordinateX]; newRangeY = [self.delegate plotSpace:self willChangePlotRangeTo:newRangeY forCoordinate:CPCoordinateY]; } self.xRange = newRangeX; self.yRange = newRangeY; //-- Madhup Changed it for keeping y axis fixed --// NSLog(@"%@",self.graph.axisSet.axes); NSMutableArray *axisArr= [[NSMutableArray alloc] initWithArray:self.graph.axisSet.axes]; CPXYAxis *yAxis = [axisArr objectAtIndex:1]; CGPoint point = yAxis.position; point.y -= lastDragPoint.x; yAxis.position = point; [axisArr replaceObjectAtIndex:1 withObject:yAxis]; self.graph.axisSet.axes = axisArr; [axisArr release]; NSLog(@"%@",self.graph.axisSet.axes); //--******************************--// lastDragPoint = pointInPlotArea; return YES; } return NO; } </code></pre> <p>Now from the code you people can see that i am able to stop the scrolling of map only in horizontal direction, but still I am not able to keep the y-axis fixed. I have written some code for that in this method too but it does not seem to be working.</p>
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    1. USMadhup Singh Yadav
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    1. COMaybe just setting `interactionPoint.y = 0.f;` at the very beginning of this method would work?
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      1. USPascal
    2. COHello, I tried your code but have problem with plotArea and isDragging properties, seems they cannot be accessed like this anymore. Do you have some hints of what to change ? Thanks
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      1. USLuc
 

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