TRichEdit右键滚屏

韩冰

TRichEdit右键滚屏 & L J3 k. A. ?* ~! x

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void __fastcall TMainForm::RichEditMouseMove(TObject *Sender, TShiftState Shift, int X, int Y) 1 W. h" R- U, R$ \{ . }9 d2 Y/ b3 k7 n0 kif(RightButtonFlag) { + ^9 e8 p5 G- qif(RightY>(Y+8)) ' ^" ^0 }3 e3 q1 C2 e- B{ 7 f3 o' m7 s1 tRightY=Y; SendMessage(RichEdit->Handle, EM_SCROLL, SB_LINEDOWN, 0); } 6 E# i/ f, i* Z W% Relse if(RightY<(Y-8)) / W4 ~# L- u8 J" b+ S, [, ?: h- u{ 4 _6 {( v+ y( A1 \7 {RightY=Y; SendMessage(RichEdit->Handle, EM_SCROLL, SB_LINEUP, 0); : y+ f7 {$ p0 j8 N: B} RichEditDragFlag=true; % ~4 @! P" T4 A* g2 S} : b: g" y9 b6 ]$ y, p7 ]} //-------------------------------------------------------------- 5 r& ^. z, h; B6 m+ o9 S% x9 Ovoid __fastcall TMainForm::RichEditMouseDown(TObject *Sender, : y0 ` Z1 t8 P9 k& [* zTMouseButton Button, TShiftState Shift, int X, int Y) ) ^: i: W% d% J9 h/ M' L{ ! v7 ^7 z: e) t C5 H9 d5 cif(Button==mbRight) { / d9 C0 s5 R; s: A7 xRightButtonFlag=true; Screen->Cursor=crHandPoint; 1 B, u$ i2 |' Z" e HRightX=X; . ?1 W. F8 _# M. K# Q4 W, S5 o& NRightY=Y; SetCapture(RichEdit->Handle); } , J2 ^3 t9 \% I3 y; ?else ' `9 A( M- J0 ?+ ]; z$ l+ h2 ERightButtonFlag=false; ; A- y$ S$ T' Z7 c) _# w+ Q} 7 p/ e/ {2 m: f, s1 J//-------------------------------------------------------------- void __fastcall TMainForm::RichEditMouseUp(TObject *Sender, TMouseButton Button, TShiftState Shift, int X, int Y) { & h5 h; x- Z& G8 m6 Z* K7 u1 T* yif(RightButtonFlag) ReleaseCapture(); if(RichEditDragFlag) { RightButtonFlag=false; $ w- c$ c- Q. tRichEditDragFlag=false; 0 H i( X: O1 R. Z1 J# C8 VScreen->Cursor=crDefault; RichEdit->opupMenu=NULL; 2 c( x" x7 l4 x% W( k' I7 q} ' @7 T8 W1 w6 K6 e; [0 \- zelse : n5 C, G; j4 U" ~{ 7 R7 R" H9 N9 M% M6 V4 o3 J: l. fRichEdit->opupMenu=RichEditPopupMenu; 8 T6 }/ @# N4 M# A* q6 ~. E} }