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Issue #213: scale main image list, by stretching icons and breaking their alpha transparency

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This commit is contained in:
Ansgar Becker
2018-10-24 21:22:54 +02:00
parent 47de6d734d
commit 198b89662a
2 changed files with 46 additions and 1 deletions
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44
source/apphelpers.pas
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@ -13,7 +13,8 @@ uses
Windows, ShlObj, ActiveX, VirtualTrees, SynRegExpr, Messages, Math,
Registry, DateUtils, Generics.Collections, StrUtils, AnsiStrings, TlHelp32, Types,
dbconnection, mysql_structures, SynMemo, Menus, WinInet, gnugettext, Themes,
Character, ImgList, System.UITypes, ActnList, WinSock, IOUtils, StdCtrls, ComCtrls;
Character, ImgList, System.UITypes, ActnList, WinSock, IOUtils, StdCtrls, ComCtrls,
CommCtrl;
type
@ -346,6 +347,7 @@ type
function GetCurrentPackageFullName(out Len: Cardinal; Name: PWideChar): Integer; stdcall; external kernel32 delayed;
function GetUwpFullName: String;
function RunningAsUwp: Boolean;
procedure ScaleImageList(const ImgList: TImageList; ScaleFactor: Real);
var
AppSettings: TAppSettings;
@ -2937,6 +2939,46 @@ begin
Result := GetUwpFullName <> '';
end;
procedure ScaleImageList(const ImgList: TImageList; ScaleFactor: Real);
var
i: Integer;
Extracted, Scaled: Graphics.TBitmap;
ImgListCopy: TImageList;
begin
if ScaleFactor = 1 then
Exit;
// Create copy of original image list
ImgListCopy := TImageList.Create(nil);
ImgListCopy.ColorDepth := cd32Bit;
ImgListCopy.DrawingStyle := dsTransparent;
ImgListCopy.Clear;
// Add from source image list
for i := 0 to ImgList.Count-1 do begin
ImgListCopy.AddImage(ImgList, i);
end;
// Set size to match scale factor
ImgList.SetSize(Round(ImgList.Width * ScaleFactor), Round(ImgList.Height * ScaleFactor));
for i:= 0 to ImgListCopy.Count-1 do begin
Extracted := Graphics.TBitmap.Create;
ImgListCopy.GetBitmap(i, Extracted);
Scaled := Graphics.TBitmap.Create;
Scaled.Width := ImgList.Width;
Scaled.Height := ImgList.Height;
Scaled.Canvas.FillRect(Scaled.Canvas.ClipRect);
GraphUtil.ScaleImage(Extracted, Scaled, ScaleFactor);
ImgList.Add(Scaled, Scaled);
end;
ImgListCopy.Free;
end;
{ Threading stuff }