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BUTTONS.PAS
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Pascal/Delphi Source File
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1992-08-10
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408 lines
{Buttons - Copyright (C) Doug Overmyer 7/1/91}
unit Buttons;
{************************ Interface ***********************}
interface
uses WinTypes, WinProcs, WinDos, Strings, WObjects,WIN31,ShellAPI;
const
um_ButtonU = 198;
um_ButtonD = 199;
type
hDrop=THandle;
type {OD Button uses internal .bmp resource }
PODButton = ^TODButton;
TODButton = object(TRadioButton)
HBmp :HBitmap;
State:Integer;
X,Y,W,H:Integer;
constructor Init(AParent:PWindowsObject; AnID:Integer;ATitle:PChar;
X1,Y1,W1,H1:Integer;IsDefault:Boolean;BMP:PChar;AGroup:PGroupBox);
destructor Done;virtual;
procedure DrawItem(var Msg:TMessage);virtual;
procedure WMRButtonDown(var Msg:TMessage);virtual wm_First+wm_RButtonDown;
end;
PODDButton = ^TODDButton;{OD Button with D&D - .ICO file,extracted icon res, or internal bmp resource}
TODDButton = object(TODButton)
SourceName:Array[0..79] of Char;
constructor Init(AParent:PwindowsObject;AnID:Integer;ATitle:PChar;
X1,Y1,W1,H1:Integer;IsDefault:Boolean;BMP:PChar;AGroup:PGroupBox);
procedure SetupWindow;virtual;
function CanClose:Boolean;virtual;
procedure ChangeBMP(BMPFile:PChar);
procedure GetBMP;virtual;
procedure WMDropFiles(var Msg:TMessage);virtual wm_First+wm_DropFiles;
end;
PODGroupBox = ^TODGroupBox; {Group box for TODButton }
TODGroupBox = object(TGroupBox)
OldID:Integer;
constructor Init(AParent:PWindowsObject;AnID:Integer;AText:PChar;
X,Y,W,H:Integer);
procedure SelectionChanged(NewID:Integer);virtual;
end;
PODDGroupBox = ^TODDGroupBox; {Group box for TODDButton }
TODDGroupBox = object(TODGroupBox)
procedure SetupWindow;virtual;
function CanClose:Boolean;virtual;
procedure WMDropFiles(var Msg:TMessage);virtual wm_First+wm_DropFiles;
end;
{************************ Implementation **********************}
implementation
const
SR_RECESSED = 1;
SR_RAISED = 0;
{************************ Functions ****************************}
{************************ DrawHiLites ****************************}
function DrawHilites(PaintDC:hDC;X1,Y1,X2,Y2,LW,State:Integer):Boolean;
var
LPts,RPts:Array[0..2] of TPoint;
Pen1,Pen2,OldPen:HPen;
Ofs,W,H:Integer;
OldBrush:HBrush ;
begin
Pen1 := CreatePen(ps_Solid,1,$00000000); {Draw a surrounding blk frame}
OldPen := SelectObject(PaintDC,Pen1);
OldBrush := SelectObject(PaintDC,GetStockObject(null_Brush));
Rectangle(PaintDC,X1,Y1,X2,Y2);
SelectObject(PaintDC,OldPen);
SelectObject(PaintDC,OldBrush);
DeleteObject(Pen1);
Ofs := Byte(State = SR_RECESSED) * lw;
LPts[0].x := X1+Ofs; LPts[0].y := Y2-Ofs;
LPts[1].x := X1+Ofs; LPts[1].y := Y1+Ofs;
LPts[2].x := X2-Ofs; LPts[2].y := Y1+Ofs;
RPts[0].x := X1+Ofs; RPts[0].y := Y2-Ofs;
RPts[1].x := X2-Ofs; RPts[1].y := Y2-Ofs;
RPts[2].x := X2-Ofs; RPts[2].y := Y1+Ofs;
if State = SR_RAISED then
begin
Pen1 := CreatePen(ps_Solid,LW,$00FFFFFF);
Pen2 := CreatePen(ps_Solid,LW,$00000000);
end
else
begin
Pen1 := CreatePen(ps_Solid,LW,$00000000);
Pen2 := CreatePen(ps_Solid,LW,$00FFFFFF);
end;
OldPen := SelectObject(PaintDC,Pen1); {Draw the highlights}
PolyLine(PaintDC,LPts,3);
SelectObject(PaintDC,Pen2);
DeleteObject(Pen1);
PolyLine(PaintDC,RPts,3);
SelectObject(PaintDC,OldPen);
DeleteObject(Pen2);
end;
{Courtesy of Neil Rubenstein on CIS}
function ICOtoBMP(FileName:PChar):HBitmap;
{$I-}
type
IcoHeader = Record
icoReserved0:Word;
icoResourceType1:Word;
icoResourceCount:Word;
end;
IcoDescript = Record
Width,Height,ColorCount:Byte;
Reserved1:Byte;
Reserved2,Reserved3:Word;
icoDIBSize:LongInt;
icoDIBOffset:LongInt;
end;
var
F:File;
iH:IcoHeader;
iD:icoDescript;
ImNum,N:Word;
Buf:Array[0..60] of Char;
imSize,imOfs:LongInt;
hNu:hBitmap;
BI:PBitmapInfo;
BitData:Pointer;
Path,Dir,Name,Ext:Array[0..79] of Char;
DC:hDC;
const
BISize:Word = sizeof(TBitmapInfoHeader)+16*sizeof(TRGBQuad);
procedure Cleanup;
begin
Close(F);
if IOresult <> 0 then ;
if Bitdata <> nil then
FreeMem(BitData,BI^.bmiHeader.biSizeImage);
if BI <> nil then FreeMem(BI,BISize);
end;
begin
IcoToBMP := 0;
FileSplit(FileName,Dir,Name,Ext);
StrCat(StrCat(StrCopy(Path,Dir),Name),'.ICO');
Assign(F,Path);
Reset(F,1);
if IOResult <> 0 then Exit;
BI := Nil;
bitData := nil;
BlockRead(F,IH,sizeof(IH));
if (IOResult <> 0) or (IH.icoReserved0 <> 0) or (IH.icoResourceType1 <> 1) then
begin
Cleanup;
Exit;
end;
imNum := IH.icoResourceCount;
N :=0;imSize := 0;imOfs := 0;
While (N < imNum) and (imOfs = 0) DO
begin
BlockRead(F,ID,sizeof(ID));
if IOresult <> 0 then
begin
Cleanup;
exit;
End;
if (ID.width=32) and (ID.height=32) and (ID.colorCount=16) then
begin
imSize := ID.icoDibSize;
imOfs := ID.icoDibOffset;
end;
Inc(N);
end;
if imOfs <> 0 then
begin
GetMem(BI,BISize);
Seek(F,imOfs);
BlockRead(F,BI^,BISize);
with BI^.bmiHeader do
begin
biHeight := 32;
biSizeImage := (biWidth div 2)* biHeight;
end;
GetMem(BItData,BI^.bmiHeader.biSizeImage);
BlockRead(F,bitData^,BI^.bmiHeader.biSizeImage);
DC:=CreateDC('Display',nil,nil,nil);
ICOToBMP := CreateDiBitmap(DC,BI^.bmiHeader,cbm_Init,bitData,BI^,DIB_RGB_COLORS);
DeleteDC(DC);
end;
CleanUP;
end;
{***************************** TODButton *************************}
constructor TODButton.Init(AParent:PWindowsObject; AnID:Integer;ATitle:PChar;
X1,Y1,W1,H1:Integer;IsDefault:Boolean;BMP:PChar;AGroup:PGroupBox);
begin
TRadioButton.Init(AParent,AnID,ATitle,X1,Y1,W1,H1,AGroup);
Attr.Style := Attr.Style or bs_OwnerDraw;
HBmp := LoadBitmap(HInstance,BMP);
X:= X1;Y:= Y1;H:=H1;W:= W1;
State := SR_RAISED;
end;
destructor TODButton.Done;
begin
DeleteObject(HBmp);
TButton.Done;
end;
procedure TODButton.DrawItem(var Msg:TMessage);
var
TheDC,MemDC:HDc;
OldBitMap:HBitMap;
PDIS :^TDrawItemStruct;
PenWidth,OffSet:Integer;
GKS,OldState:Integer;
begin
PDIS := Pointer(Msg.lParam);
If IsIconic(hWindow) then Exit;
OldState := State;
if Group = NIL then
begin
if PDIS^.itemAction = oda_Focus then Exit;
if ((PDIS^.itemAction and oda_Select ) > 0) and
((PDIS^.itemState and ods_Selected) > 0) then
State := SR_RECESSED else State := SR_RAISED;
end
else
begin
GKS := GetKeyState(vk_LButton);
if (PDIS^.itemAction = oda_DrawEntire) then
State := State
else if (PDIS^.itemAction = oda_Select) and
(PDIS^.ItemState = ods_Selected + ods_Focus)
then State := SR_RECESSED
else if (PDIS^.itemAction = 2) and
(PDIS^.ItemState = ods_Focus) and (GKS < 0)
then State := SR_RAISED
else Exit;
end;
if (State <> OldState) then
SendMessage(Parent^.HWindow,wm_User+um_ButtonU+State,GetId,0);
offset := 2;
PenWidth := OffSet;
MemDC := CreateCompatibleDC(PDIS^.HDC);
OldBitMap := SelectObject(MemDC,HBMP);
if State = SR_RAISED then BitBlt(PDIS^.HDC,0,0,W,H, MemDC,0,0,SrcCopy)
else BitBlt(PDIS^.HDC,OffSet,OffSet,W,H, MemDC,0,0,SrcCopy);
SelectObject(MemDC,OldBitMap);
DeleteDC(MemDC);
DrawHiLites(PDIS^.hDC,0,0,W,H,1,State);
end;
procedure TODButton.WMRButtonDown(var Msg:TMessage);
begin
SendMessage(Parent^.HWindow,wm_User+wm_RButtonDown,Integer(GetID),0);
end;
{********************* TODDButton *****************************}
constructor TODDButton.Init(AParent:PwindowsObject;AnID:Integer;ATitle:PChar;
X1,Y1,W1,H1:Integer;IsDefault:Boolean;BMP:PChar;AGroup:PGroupBox);
begin
TODButton.Init(AParent,AnId,ATitle,X1,Y1,W1,H1,IsDefault,'',AGroup);
if BMP <> NiL then
StrCopy(SourceName,BMP)
else StrCopy(SourceName,'');
end;
procedure TODDButton.SetupWindow;
begin
TODButton.SetupWindow;
DragAcceptFiles(HWindow,TRUE);
GetBMP;
end;
function TODDButton.CanClose:Boolean;
begin
DragAcceptFiles(HWindow,FALSE);
CanClose := TODButton.CanClose;
end;
procedure TODDButton.WMDropFiles(var Msg:TMessage);
var
DropItem:hDrop;
FileNameBuf:Array[0..fsPathName] of Char;
NewIcon:hIcon;
GFileName:PChar;
CtrlID:Integer;
begin
DropItem := Msg.wParam;
DragQueryFile(DropItem,0,FileNameBuf,sizeof(FileNameBuf));
GFileName :=StrNew(FileNameBuf);
StrCopy(SourceName,FileNameBuf);
GetBMP;
DragFinish(DropItem);
CtrlID := GetID;
SendMessage(Parent^.HWindow,wm_User+wm_DropFiles,CtrlID,LongInt(GFileName));
StrDispose(GFileName);
end;
procedure TODDButton.ChangeBMP(BMPFile:PChar);
begin
StrCopy(SourceName,BMPFile);
GetBMP;
end;
procedure TODDButton.GetBMP;
var
Icon:hIcon;
MemDC,MemDC2,DC:HDC;
OldBmp,OldBMP2:HBitmap;
OldBrush:HBrush;
DIBmp:HBitmap ;
begin
if HBmp > 0 then DeleteObject(HBmp);
Icon := 0; DIBmp := 0; HBmp := 0;
Icon := ExtractIcon(HInstance,SourceName,0); {try to get an icon out of source}
if Icon < 2 then {well, see if it's an .ICO file}
DIBmp := ICOtoBMP(SourceName);
if DiBmp = 0 then {last resort - see if it's an internal resource}
DIBmp :=LoadBitmap(HInstance,SourceName);
DC := GetDC(HWindow);
hBmp := CreateCompatibleBitmap(DC,W,H);
MemDC := CreateCompatibleDC(DC);
OldBmp := SelectObject(MemDC,hBmp);
OldBrush := SelectObject(MemDC,GetStockObject(ltGray_Brush));
PatBlt(MemDC,0,0,Pred(W),Pred(H),PatCopy);
if Icon >1 then
DrawIcon(MemDC,1,1,Icon)
else if DIBmp >0 then
begin
MemDC2 := CreateCompatibleDC(DC);
OldBmp2 :=SelectObject(MemDC2,DIBmp);
BitBlt(MemDC,1,1,Pred(W),Pred(H),MemDC2,0,0,SrcCopy);
SelectObject(MemDC2,OldBmp2);
DeleteObject(DIBmp);
DeleteDC(MemDC2);
end
else
Rectangle(MemDC,0,0,W,H);
SelectObject(MemDC,OldBmp);
SelectObject(MemDC,OldBrush);
DeleteDC(MemDC);
ReleaseDC(hWindow,DC);
InvalidateRect(HWindow,nil,True);
{ UpdateWindow(HWindow); }
end;
{****************** TODGroupBox ******************************}
constructor TODGroupBox.Init(AParent:PWindowsObject;AnID:Integer;AText:PChar;
X,Y,W,H:Integer);
begin
TGroupBox.Init(AParent,AnId,AText,X,Y,W,H);
Attr.Style := Attr.Style {and not ws_Visible};
OldID := 0;
end;
procedure TODGroupBox.SelectionChanged(NewID:Integer);
begin
TGroupBox.SelectionChanged(NewID);
if NewID = OldID then
Exit;
If OldID = 0 then
OldID := NewID
else
begin
PODButton(Parent^.ChildWithID(OldID))^.State := SR_RAISED;
InvalidateRect(Parent^.ChildWithID(OldID)^.HWindow,nil,True);
OldID := NewID;
end;
end;
{************************* TODDGroupBox **************************}
procedure TODDGroupBox.SetupWindow;
begin
TODGroupBox.SetupWindow;
DragAcceptFiles(HWindow,TRUE);
SetClassWord(HWindow,GCW_HBRBACKGROUND,GetStockObject(LTGRAY_BRUSH));
end;
function TODDGroupBox.CanClose:Boolean;
begin
DragAcceptFiles(HWindow,FALSE);
CanClose := TGroupBox.CanClose;
end;
procedure TODDGroupBox.WMDropFiles(var Msg:TMessage);
var
DropItem:hDrop;
FileNameBuf:Array[0..fsPathName] of Char;
NewIcon:hIcon;
MemDC,DC:HDC;
OldBmp,NewBmp:HBitmap;
OldBrush:HBrush;
GFileName:PChar;
CtrlID:Integer;
Loc,SLoc:TPoint;
ChildWin:HWnd;
begin
DropItem := Msg.wParam;
DragQueryFile(DropItem,0,FileNameBuf,sizeof(FileNameBuf));
GFileName :=StrNew(FileNameBuf);
DragQueryPoint(DropItem,Loc);
DragFinish(DropItem);
SLoc := Loc;
ClienttoScreen(HWindow,SLoc);
ChildWin := WindowFromPoint(SLoc);
CtrlID := GetDlgCtrlID(ChildWin);
SendMessage(Parent^.HWindow,wm_User+wm_DropFiles,CtrlID,LongInt(GFileName));
StrDispose(GFileName);
end;
end.