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lazmapviewer: Fix mismatch of checked items for distance calculation after r6879 (https://forum.lazarus.freepascal.org/index.php/topic,12674.msg319432.html, patch by sstvmaster).

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git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@6883 8e941d3f-bd1b-0410-a28a-d453659cc2b4
This commit is contained in:
wp_xxyyzz
2019-04-28 20:48:23 +00:00
parent 451f4586af
commit f07562d3cb
2 changed files with 25 additions and 30 deletions
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54
components/lazmapviewer/example/gpslistform.pas
View File

@ -97,53 +97,47 @@ end;
procedure TGPSListViewer.BtnCalcDistanceClick(Sender: TObject);
type
TCoorRec = record
TCoordRec = record
Lon: Double;
Lat: Double;
Name: String;
end;
var
i, iChecked: Integer;
gpsObj: TGpsObj;
gpsPt: TGpsPoint;
TCoorArr: array[0..1] of TCoorRec;
item: TListItem;
rPt: TRealPoint;
CoordArr: array[0..1] of TCoordRec;
begin
// count checked items
iChecked := 0;
for i:=0 to ListView.Items.Count - 1 do begin
if ListView.Items.Item[i].Checked then Inc(iChecked);
end;
//
if iChecked <> 2 then begin
ShowMessage('Please select 2 items to calculate the distance.');
end
else begin
iChecked := 0;
for i:=0 to ListView.Items.Count - 1 do begin
if ListView.Items.Item[i].Checked then begin
gpsObj := FList.Items[i];
if gpsObj is TGpsPoint then begin
gpsPt := TGpsPoint(gpsObj);
TCoorArr[iChecked].Lat := gpsPt.Lat;
TCoorArr[iChecked].Lon := gpsPt.Lon;
TCoorArr[iChecked].Name:= gpsPt.Name;
Inc(iChecked);
end;
exit;
end;
iChecked := 0;
for i:=0 to ListView.Items.Count - 1 do begin
if ListView.Items.Item[i].Checked then begin
item := ListView.Items[i];
if TryStrToGps(item.SubItems[2], rPt.Lon) and TryStrToGps(item.SubItems[1], rPt.Lat) then
begin
CoordArr[iChecked].Lon := rPt.Lon;
CoordArr[iChecked].Lat := rPt.Lat;
CoordArr[iChecked].Name:= item.SubItems[0];
Inc(iChecked);
end;
end;
// show distance between selected items
ShowMessage('Distance between ' + TCoorArr[0].Name + ' and ' + TCoorArr[1].Name + ' is: ' +
Format('%.2n %s.', [
CalcGeoDistance(
TCoorArr[0].Lat,
TCoorArr[0].Lon,
TCoorArr[1].Lat,
TCoorArr[1].Lon,
DistanceUnit
),
DistanceUnit_Names[DistanceUnit]
]));
end;
// show distance between selected items
ShowMessage(Format('Distance between %s and %s is: %.2n %s.', [
CoordArr[0].Name, CoordArr[1].Name,
CalcGeoDistance(CoordArr[0].Lat, CoordArr[0].Lon, CoordArr[1].Lat, CoordArr[1].Lon, DistanceUnit),
DistanceUnit_Names[DistanceUnit]
]));
end;
procedure TGPSListViewer.BtnDeletePointClick(Sender: TObject);

1
components/lazmapviewer/source/mvmapviewer.pas
View File

@ -517,6 +517,7 @@ begin
{$IFDEF USE_LAZINTFIMAGE}
bmp := TBitmap.Create;
try
bmp.PixelFormat := pf32Bit;
bmp.SetSize(Buffer.Width, Buffer.Height);
bmp.LoadFromIntfImage(Buffer);
Canvas.Draw(0, 0, bmp);