Delphi7 How to enable Tedit display text to center vertically (up and down center)

Source: Internet
Author: User

With the following components, you can automatically center vertically when you enter text
Save the following code directly to Unit1.pas

UnitUnit1;InterfaceusesWindows, Messages, sysutils, variants, Classes, Graphics, Controls, Forms, Dialogs, Stdctrls;typeTedit=class(Stdctrls.tedit)protected    procedureCreateParams (varParams:tcreateparams);Override; procedureKeyPress (varKey:char);Override; procedureWmsize (varMsg:twmsize);messagewm_size; procedureSetParent (Aparent:twincontrol);Override; procedureSetCenter; End; TForm1=class(tform) Button1:tbutton;    Edit1:tedit; procedureformcreate (Sender:tobject); Private    {Private Declarations}   Public    {Public Declarations}Edt:tedit; End;varForm1:tform1;Implementation{$R *.DFM}{Tedit}proceduretform1.formcreate (sender:tobject);beginEdt:= Tedit.Create(self); Edt.parent:=Self ; Edt.autosize:=False; Edt.height:= -;End;procedureTedit.createparams (varparams:tcreateparams);begin  inherited; Params.styleorEs_multiline;End;procedureTedit.keypress (varKey:char);begin  inherited; ifKey = # -  ThenKey:= #0;End;procedureTedit.wmsize (varmsg:twmsize);begin  inherited; SetCenter;End;proceduretedit.setparent (Aparent:twincontrol);begin  inherited; ifParent <>Nil  Then  beginSetCenter; End;End;procedureTedit.setcenter;varDc:hdc; Savefont:hfont; Sin:integer; SysMetrics, Metrics:ttextmetric; Rct:trect;beginDC:= GetDC (0); GetTextMetrics (DC, SysMetrics); Savefont:=SelectObject (DC, Font.handle); GetTextMetrics (DC, Metrics); SelectObject (DC, Savefont); ReleaseDC (0, DC);ifCtl3d ThenSin: =8 ElseSin: =6; RCT:=Clientrect; Sin:= Height-metrics.tmheight-Sin; SinDiv 2; SendMessage (Handle, Em_setrect,0, Integer (@Rct));End;End.

When this is saved to Unit1.pas, and then through the Delphi Component installation function to install the components, the specific installation method can go to the online search method

Delphi7 How to enable Tedit display text to center vertically (up and down center)

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