paweld/lazarus
1
0
Fork 0
mirror of https://gitlab.com/freepascal.org/lazarus/lazarus.git synced 2025-08-10 14:36:09 +02:00
Code Issues Packages Projects Releases Wiki Activity

TAChart: Initial version of 3-d pie charts

Browse Source 
git-svn-id: trunk@35624 -
This commit is contained in:
ask 2012-02-29 16:55:08 +00:00
parent 1bb99f869b
commit 31c109090a
2 changed files with 43 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
components/tachart/taradialseries.pas
View File

@ -194,10 +194,15 @@ begin
end;
procedure TCustomPieSeries.Draw(ADrawer: IChartDrawer);
const
STEP = 4;
var
prevAngle: Double = 0;
prevLabelPoly: TPointArray = nil;
ps: TPieSlice;
i, numSteps: Integer;
nextAngle: Double;
p: array of TPoint;
begin
if IsEmpty then exit;
@ -205,6 +210,38 @@ begin
Measure(ADrawer);
ADrawer.PrepareSimplePen(clBlack);
if Depth > 0 then begin
prevAngle := 0;
for ps in FSlices do begin
nextAngle := prevAngle + ps.FAngle;
if ps.FVisible then begin
ADrawer.SetBrushParams(bsSolid, SliceColor(ps.FOrigIndex));
if not InRange(nextAngle, Pi / 4, 5 * Pi / 4) then
ADrawer.DrawLineDepth(
ps.FBase, ps.FBase + RotatePointX(FRadius, -nextAngle), Depth);
if InRange(prevAngle, Pi / 4, 5 * Pi / 4) then
ADrawer.DrawLineDepth(
ps.FBase, ps.FBase + RotatePointX(FRadius, -prevAngle), Depth);
end;
prevAngle := nextAngle;
end;
prevAngle := 0;
for ps in FSlices do begin
nextAngle := prevAngle + ps.FAngle;
if ps.FVisible then begin
ADrawer.SetBrushParams(bsSolid, SliceColor(ps.FOrigIndex));
numSteps := Round(2 * Pi * ps.FAngle * FRadius / STEP);
SetLength(p, 2 * numSteps);
for i := 0 to numSteps - 1 do begin
p[i] := ps.FBase + RotatePointX(FRadius, -prevAngle - ps.FAngle * i / (numSteps - 1));
p[High(p) - i] := p[i] + Point(Depth, -Depth);
end;
ADrawer.Polygon(p, 0, Length(p));
end;
prevAngle := nextAngle;
end;
end;
prevAngle := 0;
for ps in FSlices do begin
if ps.FVisible then begin
ADrawer.SetBrushParams(bsSolid, SliceColor(ps.FOrigIndex));
@ -435,7 +472,11 @@ begin
a := prevAngle + FAngle / 2;
if Exploded and (di^.X > 0) then
FBase += EndPoint(a, FRadius * di^.X);
ExpandRect(Result, FBase, FRadius, - prevAngle, - prevAngle - FAngle);
ExpandRect(Result, FBase, FRadius, -prevAngle, -prevAngle - FAngle);
if Depth > 0 then
ExpandRect(
Result, FBase + Point(Depth, -Depth),
FRadius, -prevAngle, -prevAngle - FAngle);
FLabel.FAttachment := EndPoint(a, FRadius) + FBase;
PrepareLabel(FLabel, i, a);
end;

1
components/tachart/taseries.pas
View File

@ -111,6 +111,7 @@ type
TPieSeries = class(TCustomPieSeries)
published
property Depth;
property Exploded;
property FixedRadius;
property MarkPositions;