📄 mainform.cpp
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//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop
#include "Mainform.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormPaint(TObject *Sender)
{//显示渐变背景
double y,Step=Height/256.00;
for(int i=255;i>0;i--)
{
Form1->Canvas->Brush->Color=TColor(0x00000000+i*0x10000);
Form1->Canvas->FillRect(Rect(0,int(y),Width,int(y+Step)));
y=y+Step;
}
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormResize(TObject *Sender)
{//更新背景
Form1->Refresh();
}
//---------------------------------------------------------------------------
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