GDI+自绘按钮，无窗口句柄

#pragma once
#include "stdafx.h"

enum btn_state{nomal,down,up,over};

#define  WM_BTN_UP WM_USER+1
#define  WM_BTN_DOWN WM_USER+2
#define  WM_BTN_MOVE WM_USER+3
class CUS_BTN
{
public:
 CUS_BTN(void);
 CUS_BTN(int left,int top,int width,int height,Gdiplus::Image* img,HWND parent_hwnd,UINT id);

 HWND parent_hwnd;

 btn_state   CUS_STATE;///按钮状态
 Image *img_src;

 UINT  id;

 RECT rect;
 bool create_btn(int left,int top,int width,int height,Gdiplus::Image* img,HWND m_hwd,UINT id);
 bool create_btn(int left,int top,Gdiplus::Image* img,HWND m_hwd,UINT id);

 UINT get_button_id();

 btn_state get_button_state();//得到按钮状态
 bool set_button_state(btn_state sta); //设置状态

 

 int get_button_width();//得到宽度
 int get_button_height();//得到高度

 bool set_button_width(int width_num);//得到宽度
 bool set_button_height(int height_num);//得到高度

 int get_button_left();
 int get_button_top();
 int get_button_right();
 int get_button_bottom();

 RECT get_button_rect();

 void DRAW_UI(Gdiplus::Graphics& g);

 void on_lbutton_down(POINT& pt);
 void on_lbutton_up(POINT& pt);
 void on_mouse_move(POINT& pt);
 ~CUS_BTN(void);
};

 

 

 

.cpp

 

 

#include "StdAfx.h"
#include "US_BTN.h"

CUS_BTN::CUS_BTN(void)
{
 id = 0;
 rect.left = 0;
 rect.top =  0;
 rect.bottom = 0;
 rect.right = 0;
 img_src = NULL;
 parent_hwnd = NULL;
}

CUS_BTN::CUS_BTN(int left,int top,int width,int height,Gdiplus::Image* img,HWND m_hwd,UINT id)
{
 rect.left = left;
 rect.top =  top;
 rect.bottom = top+height;
 rect.right = left+width;
 img_src = img;
 parent_hwnd = m_hwd;
 this->id = id;
}

CUS_BTN::~CUS_BTN(void)
{

}

 

bool CUS_BTN::create_btn(int left,int top,int width,int height,Gdiplus::Image* img,HWND m_hwd,UINT id)
{
 if (img != NULL)
 {
  rect.left = left;
  rect.top =  top;
  rect.bottom = top+height;
  rect.right = left+width;
  img_src = img;
  parent_hwnd = m_hwd;
  this->id = id;
  return TRUE;
 }

 return false;
}

bool CUS_BTN::create_btn(int left,int top,Gdiplus::Image* img,HWND m_hwd,UINT id)
{
 if (img != NULL)
 {
  rect.left = left;
  rect.top =  top;
  if (img->GetWidth() > img->GetHeight())
  {
   rect.bottom = img->GetHeight()+rect.top;
   rect.right = img->GetWidth()/4+rect.left;
  }else
  {
   rect.bottom = img->GetHeight()/4+rect.top;
   rect.right = img->GetWidth()+rect.left;
  }
  img_src = img;
  parent_hwnd = m_hwd;
  this->id = id;
  return TRUE;
 }

 return false;
}

btn_state CUS_BTN::get_button_state()//得到按钮状态
{
 return CUS_STATE;
}

 

bool CUS_BTN::set_button_state(btn_state sta)
{
 CUS_STATE = sta;
 return true;
}

int CUS_BTN::get_button_width()
{
 return rect.right-rect.left;
}

int CUS_BTN::get_button_height()
{
 return rect.bottom-rect.top;
}

int CUS_BTN::get_button_left()
{
 return rect.left;
}

int CUS_BTN::get_button_top()
{
 return rect.top;
}

int CUS_BTN::get_button_right()
{
 return rect.right;
}

int CUS_BTN::get_button_bottom()
{
 return rect.bottom;
}

void CUS_BTN::DRAW_UI(Gdiplus::Graphics& g)
{
 if (get_button_state() == nomal)
 {
  if (img_src->GetWidth() > img_src->GetHeight())
  {
   g.DrawImage(img_src,rect.left,rect.top,img_src->GetWidth()/4*0,0,img_src->GetWidth()/4,img_src->GetHeight(),Gdiplus::UnitPixel);
  }else
  {
   g.DrawImage(img_src,rect.left,rect.top,0,img_src->GetHeight()/4*0,img_src->GetWidth(),img_src->GetHeight()/4,Gdiplus::UnitPixel);
  }

 }else if (get_button_state() == down)
 {
  if (img_src->GetWidth() > img_src->GetHeight())
  {
   g.DrawImage(img_src,rect.left,rect.top,img_src->GetWidth()/4*2,0,img_src->GetWidth()/4,img_src->GetHeight(),Gdiplus::UnitPixel);
  }else
  {
   g.DrawImage(img_src,rect.left,rect.top,0,img_src->GetHeight()/4*2,img_src->GetWidth(),img_src->GetHeight()/4,Gdiplus::UnitPixel);
  }

 }else if (get_button_state() == up)
 {
  if (img_src->GetWidth() > img_src->GetHeight())
  {
   g.DrawImage(img_src,rect.left,rect.top,img_src->GetWidth()/4*3,0,img_src->GetWidth()/4,img_src->GetHeight(),Gdiplus::UnitPixel);
  }else
  {
   g.DrawImage(img_src,rect.left,rect.top,0,img_src->GetHeight()/4*3,img_src->GetWidth(),img_src->GetHeight()/4,Gdiplus::UnitPixel);
  }

 }else if (get_button_state() == over)
 {
  if (img_src->GetWidth() > img_src->GetHeight())
  {
   g.DrawImage(img_src,rect.left,rect.top,img_src->GetWidth()/4*1,0,img_src->GetWidth()/4,img_src->GetHeight(),Gdiplus::UnitPixel);
  }else
  {
   g.DrawImage(img_src,rect.left,rect.top,0,img_src->GetHeight()/4*1,img_src->GetWidth(),img_src->GetHeight()/4,Gdiplus::UnitPixel);
  }
 }
 return;
}

RECT CUS_BTN::get_button_rect()
{
 return this->rect;
}

bool CUS_BTN::set_button_width(int width_num)
{
 rect.right = rect.left+width_num;
 return TRUE;
}

bool CUS_BTN::set_button_height(int height_num)
{
 rect.bottom = rect.top+height_num;
 return TRUE;
}

void CUS_BTN::on_lbutton_down(POINT& pt)
{
 if (::PtInRect(&get_button_rect(),pt))
 {
  if (get_button_state() != down)
  {
   set_button_state(down);
   ::InvalidateRect(parent_hwnd,&get_button_rect(),TRUE);
   ::SendMessage(parent_hwnd,WM_BTN_DOWN,id,0);
  }
 }
}

void CUS_BTN::on_lbutton_up(POINT& pt)
{
 if (::PtInRect(&get_button_rect(),pt))
 {
  if (get_button_state() != up)
  {
   set_button_state(up);
   ::InvalidateRect(parent_hwnd,&get_button_rect(),TRUE);
   ::SendMessage(parent_hwnd,WM_BTN_UP,id,0);
  }
 }

 if (!::PtInRect(&get_button_rect(),pt))
 {
  if (get_button_state() != nomal)
  {
   set_button_state(nomal);
   ::InvalidateRect(parent_hwnd,&get_button_rect(),TRUE);
  }
 }
}

void CUS_BTN::on_mouse_move(POINT& pt)
{
 if (::PtInRect(&get_button_rect(),pt))
 {
  if (get_button_state() != over)
  {
   if (get_button_state() != down)
   {
    set_button_state(over);
    ::InvalidateRect(parent_hwnd,&get_button_rect(),TRUE);
    ::SendMessage(parent_hwnd,WM_BTN_MOVE,id,0);
   }
  }
 }else
 {
  if (get_button_state() != nomal)
  {
   if (get_button_state() != down)
   {
    set_button_state(nomal);
    ::InvalidateRect(parent_hwnd,&get_button_rect(),TRUE);
   }
  }

 }
}

UINT CUS_BTN::get_button_id()
{
 return id;
}