TRichEdit右键滚屏

韩冰

TRichEdit右键滚屏 , Q( @. Q9 x" M% }4 n( t& _* Q4 `5 {

void __fastcall TMainForm::RichEditMouseMove(TObject *Sender, : d1 p/ O0 q/ a- e+ K4 B0 zTShiftState Shift, int X, int Y) { " [, Q- F+ \9 ?+ ^% hif(RightButtonFlag) ; D- H; ]1 F1 G! X1 [ [{ ~( }% ?1 _- Fif(RightY>(Y+8)) 1 }+ d0 F6 a9 p3 f{ RightY=Y; 5 B# z h' w- a( ]SendMessage(RichEdit->Handle, EM_SCROLL, SB_LINEDOWN, 0); } else if(RightY<(Y-8)) { 8 L3 J5 a2 _9 q* Z: s2 ARightY=Y; . j* R; `0 `( G7 I: N4 I! k6 fSendMessage(RichEdit->Handle, EM_SCROLL, SB_LINEUP, 0); } ) a9 \7 I7 X" d- j! M RRichEditDragFlag=true; } } //-------------------------------------------------------------- , ]( _" Q- A* u+ [void __fastcall TMainForm::RichEditMouseDown(TObject *Sender, # a) o* f- L, b4 TTMouseButton Button, TShiftState Shift, int X, int Y) + g7 |9 G7 F! G. T6 }{ & J- G) {3 z+ L2 T2 i; v4 d6 ?if(Button==mbRight) 0 {" G o" s: i% P{ RightButtonFlag=true; Screen->Cursor=crHandPoint; RightX=X; RightY=Y; 1 g% E. E* o, y3 c' S( m* CSetCapture(RichEdit->Handle); } $ `4 w1 }5 c `6 p2 M7 q belse 1 N* t- I( A9 U1 R& R: }0 e0 ^RightButtonFlag=false; } ' A! B1 y5 C# d- }& P6 J# `//-------------------------------------------------------------- void __fastcall TMainForm::RichEditMouseUp(TObject *Sender, TMouseButton Button, TShiftState Shift, int X, int Y) { 9 H% r8 g$ d& s- {2 U. J2 i$ Nif(RightButtonFlag) ReleaseCapture(); : [+ d9 c1 _0 _% _. S1 Qif(RichEditDragFlag) { RightButtonFlag=false; RichEditDragFlag=false; , ^1 D! [& q: Y' \% a: d; iScreen->Cursor=crDefault; $ P# G2 w6 V( Q) q5 ]RichEdit->opupMenu=NULL; } ; F4 K* ^( m$ Delse { RichEdit->opupMenu=RichEditPopupMenu; + [) l% a1 m1 h! ^} . S1 d9 L/ R. ^: D! _}