TRichEdit右键滚屏

韩冰

TRichEdit右键滚屏

void __fastcall TMainForm::RichEditMouseMove(TObject *Sender, TShiftState Shift, int X, int Y) . S$ e! T* N' ^& W$ C- h{ 0 c: x/ `! f" G3 p f+ }+ A4 x5 _ Bif(RightButtonFlag) { if(RightY>(Y+8)) " U. a. l7 L1 d$ y$ F7 _& H7 h9 b{ 8 f. j4 }; z; D8 P9 |RightY=Y; b% f6 C% T" MSendMessage(RichEdit->Handle, EM_SCROLL, SB_LINEDOWN, 0); } else if(RightY<(Y-8)) . Y( j. `' w1 D6 i" L& V5 J4 W$ `! m: y{ RightY=Y; 1 P$ [ Z Q" e" r' `SendMessage(RichEdit->Handle, EM_SCROLL, SB_LINEUP, 0); } # D: u% w, S2 `# ?2 ` w7 F, i pRichEditDragFlag=true; / C! r* B0 z0 U4 F1 e) F} : f" G* `1 p! \% u} , x9 |) `9 f/ m& }: V6 j9 M2 V//-------------------------------------------------------------- 8 _% L) \# r9 V" }4 Gvoid __fastcall TMainForm::RichEditMouseDown(TObject *Sender, TMouseButton Button, TShiftState Shift, int X, int Y) { if(Button==mbRight) ( p+ y5 O9 O$ L) Q{ RightButtonFlag=true; Screen->Cursor=crHandPoint; 6 w$ K& r8 ~5 F* ?- @RightX=X; RightY=Y; 9 r3 p! R$ Q$ m9 e [% _! _SetCapture(RichEdit->Handle); 6 X8 c9 Y6 M. C1 M: q, ~: U; U} ( R! \+ z1 R7 L' Telse RightButtonFlag=false; } 5 p. c2 _' m! \; {+ Z" v//-------------------------------------------------------------- - U3 u) T/ e8 D+ lvoid __fastcall TMainForm::RichEditMouseUp(TObject *Sender, TMouseButton Button, TShiftState Shift, int X, int Y) ( {, ^- }5 D' n5 z! W! S{ if(RightButtonFlag) ReleaseCapture(); if(RichEditDragFlag) { RightButtonFlag=false; 5 _) {1 A: Z: n' w. |" N( N1 y7 W2 S( bRichEditDragFlag=false; . }7 Z8 L+ n" ^: C. cScreen->Cursor=crDefault; RichEdit->opupMenu=NULL; } ! p% Z# K- n/ ?0 C" X: s9 lelse { RichEdit->opupMenu=RichEditPopupMenu; 9 Z" X, n3 w; s. v* \- R" `} }