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TAChart: Fix bugs in processing of empty extents.

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git-svn-id: trunk@20137 -
This commit is contained in:
ask 2009-05-23 04:13:01 +00:00
parent d8bc38d03f
commit 1421f1836b
2 changed files with 12 additions and 6 deletions
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16
components/tachart/tagraph.pas
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@ -1324,11 +1324,17 @@ procedure TChart.UpdateExtent;
if AUseMax then AHi := AMax; if AUseMax then AHi := AMax;
case Ord(ALo = Infinity) * 2 + Ord(AHi = NegInfinity) of case Ord(ALo = Infinity) * 2 + Ord(AHi = NegInfinity) of
0: begin // Both high and low boundary defined 0: begin // Both high and low boundary defined
if ALo > AHi then Exchange(ALo, AHi); if ALo = AHi then begin
// Expand view slightly to avoid puttind data points on the chart edge. ALo -= DEFAULT_WIDTH / 2;
ext := ExpandPercentage * PERCENT * Max(AHi - ALo, 1); AHi += DEFAULT_WIDTH / 2;
ALo -= ext; end
AHi += ext; else begin
if ALo > AHi then Exchange(ALo, AHi);
// Expand view slightly to avoid data points on the chart edge.
ext := ExpandPercentage * PERCENT * Max(AHi - ALo, 1);
ALo -= ext;
AHi += ext;
end;
end; end;
1: AHi := ALo + DEFAULT_WIDTH; 1: AHi := ALo + DEFAULT_WIDTH;
2: ALo := AHi - DEFAULT_WIDTH; 2: ALo := AHi - DEFAULT_WIDTH;

2
components/tachart/taseries.pas
View File

@ -1115,7 +1115,7 @@ begin
Result.b.Y := Max(Result.b.Y, 0); Result.b.Y := Max(Result.b.Y, 0);
// The 0.6 is a hack to allow the bars to have some space apart // The 0.6 is a hack to allow the bars to have some space apart
Result.a.X -= 0.6; Result.a.X -= 0.6;
Result.a.X += 0.6; Result.b.X += 0.6;
end; end;
function TBarSeries.GetSeriesColor: TColor; function TBarSeries.GetSeriesColor: TColor;