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Hi,
Sorry for my understanding but I am trying to achieve a solution where I want to render real time line/bar data on 10ms interval. However, is there a way to cache data max till last 72 hrs and user can drag the chart or Zoom out to check after pausing the graph.

0 votes
2k views

Hi guys,

I am having difficulties setting the background of my bar chart with SCICategoryDateTime X axis since I switched to 2.0.

As far as I understand, just setting the background property of the SCIChartSurface should suffice.
These are all of the things I’ve tried:

1. [self.barSurface setBackgroundColor:[UIColor clearColor]];
2. [self.barSurfaceView setBackgroundColor:[UIColor clearColor]]; 
3. self.barSurface.renderableSeriesAreaFill = [[SCISolidBrushStyle alloc] initWithColor:[UIColor clearColor]];
4. [self.barSurface.renderSurface setIsTransparent:YES];

I didn’t find any other way of setting it, but it still remains black. Any thought on what might cause it?

EDIT: I just found out about this color setting:

[axisStyle setGridBandBrush:[[SCISolidBrushStyle alloc] initWithColor:[UIColor whiteColor]]];

The result I got was a black and white chess board, as shown on the attached picture. I really don’t understand this behaviour. If I set this gridBandBrush to nil, columns are coloured with random colours, so the chart looks like a rainbow. I understand why is this happening but shouldn’t there be a default colour in case brush is nil?

EDIT 2: While debugging using “Capture view hierarchy” in XCode I discovered that render surface is actually white inside debugger. Perhaps it will give more insight to you, it doesn’t mean much to me – I guess it’s because rendering is done on GPU and the context is not available to the debugger.

Best,
Igor

  • Igor Peric asked 2 years ago
  • last active 2 years ago
0 votes
2k views

I want to draw a chart like the attached picture (SHMOO_EXAMPLE.jpg)…
And I find the most closest example is stacked bar chart.
However there is one color in each column series in the example of bar chart.
But I want to modify each cell in the chart’s color according to the other value (maybe need three or four colors in each column)
Can I do this?
thank you

  • ychch yang asked 3 years ago
  • last active 3 years ago
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