wxWidgets实现图片和文件按钮分享！

在wxWidgets中，想要通过其本身的控件来实现图片+文件的按钮，貌似不太容易做到。但是可以通过重载wxControl来自绘图片+文件按钮。下面给出的是已经封装好的按钮类：

wxBitmapButtonEx.h

  #ifndef _BITMAP_BUTTON_EX_H  #define _BITMAP_BUTTON_EX_H     #include "wx/wx.h"     enum eBitmapButtonStatus  {   BitmapButtonNormal,   BitmapButtonEnter,   BitmapButtonDown,   BitmapButtonUp,   BitmapButtonLeave,   BitmapButtonDClick,   BitmapButtonDisable  };     class wxBitmapButtonEx : public wxControl  {   DECLARE_DYNAMIC_CLASS(wxBitmapButtonEx)   DECLARE_EVENT_TABLE()  public:   wxBitmapButtonEx();   virtual ~wxBitmapButtonEx();      wxBitmapButtonEx(wxWindow* parent, wxWindowID id,     const wxPoint& pos = wxDefaultPosition,     const wxSize& size = wxDefaultSize,     long style = wxBORDER_NONE,     const wxValidator& validator = wxDefaultValidator);   bool Create(wxWindow* parent, wxWindowID id,     const wxPoint& pos = wxDefaultPosition,     const wxSize& size = wxDefaultSize,     long style = wxSUNKEN_BORDER,     const wxValidator& validator = wxDefaultValidator);      wxSize DoGetBestSize() const;   void OnPaint(wxPaintEvent& event);   virtual void OnEnter(wxMouseEvent& event);   virtual void OnLeave(wxMouseEvent& event);   virtual void OnDown(wxMouseEvent& event);   virtual void OnDClick(wxMouseEvent& event);   virtual void OnUp(wxMouseEvent& event);   virtual bool Enable(bool enable = true);   virtual bool Disable();      //设置正常图片   wxBitmapButtonEx* set_normal_bitmap(wxBitmap* bitmap);      //设置按钮按下时的切换图片   wxBitmapButtonEx* set_down_bitmap(wxBitmap* bitmap);      //设置按钮按经过时的切换图片   wxBitmapButtonEx* set_enter_bitmap(wxBitmap* bitmap);      //设置Disable图片.   wxBitmapButtonEx* set_disable_bitmap(wxBitmap* bitmap);      //设置背景图片   wxBitmapButtonEx* set_background(const wxBitmap& bitmap);      //设置背景颜色   bool set_background_colour(const wxColour& colour);      //设置按钮文字   void set_button_text(wxString str);      //设置文字字体   void set_text_font(wxFont font);     protected:   void DrawExistBitmap(wxDC* dc,wxBitmap* image1,wxBitmap* exist_image);     private:   wxBitmap background_bitmap;   bool is_used_bg;      wxBitmap* normal_bitmap;   wxBitmap* down_bitmap;   wxBitmap* enter_bitmap;   wxBitmap* disable_bitmap;      int button_status;   wxString text;   wxFont text_font;      void DrawBackground(wxDC* dc);     };  #endif /* _BITMAP_BUTTON_EX_H */

wxBitmapButtonEx.cpp

  #include "wxBitmapButtonEx.h"  #include <wx/settings.h>     BEGIN_EVENT_TABLE(wxBitmapButtonEx, wxControl)  EVT_PAINT(wxBitmapButtonEx::OnPaint)  EVT_ENTER_WINDOW(wxBitmapButtonEx::OnEnter)  EVT_LEAVE_WINDOW(wxBitmapButtonEx::OnLeave)  EVT_LEFT_DOWN(wxBitmapButtonEx::OnDown)  EVT_LEFT_DCLICK(wxBitmapButtonEx::OnDClick)  EVT_LEFT_UP(wxBitmapButtonEx::OnUp)  END_EVENT_TABLE()     IMPLEMENT_DYNAMIC_CLASS(wxBitmapButtonEx, wxControl)     wxBitmapButtonEx::wxBitmapButtonEx()  {  }     wxBitmapButtonEx::wxBitmapButtonEx(wxWindow* parent, wxWindowID id,    const wxPoint& pos,    const wxSize& size,    long style,    const wxValidator& validator)  : normal_bitmap(NULL), down_bitmap(NULL), enter_bitmap(NULL)  {   Create(parent, id, pos, size, style, validator);  }     wxBitmapButtonEx::~wxBitmapButtonEx()  {   wxDELETE(normal_bitmap);   wxDELETE(enter_bitmap);   wxDELETE(down_bitmap);  }     bool wxBitmapButtonEx::Create(wxWindow* parent, wxWindowID id,    const wxPoint& pos,    const wxSize& size,    long style,    const wxValidator& validator)  {   normal_bitmap = NULL;   down_bitmap = NULL;   enter_bitmap = NULL;   disable_bitmap = NULL;   button_status = BitmapButtonNormal;      if (!wxControl::Create(parent, id, pos, size, style, validator))   {    return false;   }   SetBackgroundStyle(wxBG_STYLE_SYSTEM);   is_used_bg = false;   text_font.Create(12,wxSWISS,wxFONTSTYLE_NORMAL,wxNORMAL,false,_T("System"),wxFONTENCODING_DEFAULT);      return true;  }     wxSize wxBitmapButtonEx::DoGetBestSize() const  {   return GetSize();  }     void wxBitmapButtonEx::DrawExistBitmap(wxDC* dc, wxBitmap* image1,    wxBitmap* exist_image)  {   int width = DoGetBestSize().GetWidth();   int height = DoGetBestSize().GetHeight();   //wxClientDC dc(this);   dc->SetPen(*wxBLACK_PEN);   wxColour clr(2,18,245);   dc->SetTextForeground(*wxWHITE);   //dc->SetBrush(*wxTRANSPARENT_BRUSH);   //dc->SetBrush(*wxBLUE_BRUSH);   //wxSystemSettings::GetColour(wxSYS_COLOUR_ACTIVECAPTION)   wxBrush brush(clr);//    dc->SetBrush(brush);      dc->DrawRectangle(0, 0, width, height);   /*wxRect rc = wxRect(0, 0, width, height);   dc->DrawRoundedRectangle(rc,5);*/      int x = normal_bitmap->GetWidth();   int y = (height-normal_bitmap->GetHeight())/2.0;      if (image1)   {   dc->DrawBitmap(*image1, width-x-5, y, true);    //dc->DrawBitmap(*image1, 0, 0, true);      } else   {   dc->DrawBitmap(*exist_image, width-x-5, y, true);    //dc->DrawBitmap(*exist_image, 0, 0, true);   }      if (text.IsEmpty())   {   return;   }      if (!text_font.IsNull())   {   dc->SetFont(text_font);   }   int pointsize = text_font.GetPointSize();      //dc.SetLayoutDirection(wxLayout_Default);      int bit = text.Find('n');   if (bit!=-1)   {   wxString str;   str = text.Left(bit);   dc->DrawText(str,5,height/2-pointsize-2);      int length = text.Length();   str = text.Mid(bit+1,length-bit-1);   dc->DrawText(str,5,height/2);   }   else   {   dc->DrawText(text,5,height/2-7);   }  }     void wxBitmapButtonEx::OnPaint(wxPaintEvent& event)  {   wxPaintDC dc(this);   DrawBackground(&dc);      //1.状态控制绘画,好处就是可以调用Refresh连背景一起刷新.   switch (button_status)   {    case BitmapButtonNormal:   case BitmapButtonUp:   case BitmapButtonLeave:   {   int width = DoGetBestSize().GetWidth();   int height = DoGetBestSize().GetHeight();   wxClientDC dc(this);   dc.SetPen(*wxGREY_PEN);   dc.SetBrush(*wxTRANSPARENT_BRUSH);      dc.DrawRectangle(0, 0, width, height);   /*wxRect rc = wxRect(0, 0, width, height);   dc.DrawRoundedRectangle(rc,5);*/      wxPoint pt[3];   pt[0].x = 1;   pt[0].y = height-1;   pt[1].x = pt[1].y = 1;   pt[2].x = width-1;   pt[2].y = 1;   dc.SetPen(*wxWHITE_PEN);   dc.DrawLines(3,pt);      pt[1].x = width-1;   pt[1].y = height-1;   dc.SetPen(*wxBLACK_PEN);   dc.DrawLines(3,pt);      int x = normal_bitmap->GetWidth();   int y = (height-normal_bitmap->GetHeight())/2.0;   dc.DrawBitmap(*normal_bitmap, width-x-5, y, true);      if (!text_font.IsNull())   {    dc.SetFont(text_font);     }   int pointsize = text_font.GetPointSize();   //dc.SetLayoutDirection(wxLayout_Default);      int bit = text.Find('n');   if (bit!=-1)   {    wxString str;    str = text.Left(bit);    dc.DrawText(str,5,height/2-pointsize-2);       int length = text.Length();    str = text.Mid(bit+1,length-bit-1);    dc.DrawText(str,5,height/2);   }   else   {    dc.DrawText(text,5,height/2-7);   }   }   //dc.DrawBitmap(*normal_bitmap, 0, 0, true);     break;    case BitmapButtonEnter:   //  if (!enter_bitmap_)   //  {   //   int width = DoGetBestSize().GetWidth();   //   int height = DoGetBestSize().GetHeight();   //   wxClientDC dc(this);   //   dc.SetPen(*wxRED_PEN);   //   dc.SetBrush(*wxTRANSPARENT_BRUSH);      //   //dc.DrawRectangle(0, 0, width, height);   //wxRect rc = wxRect(0, 0, width, height);   //dc.DrawRoundedRectangle(rc,5);   //   //   break;   //  }   //  dc.DrawBitmap(*enter_bitmap_, 0, 0, true);     break;    case BitmapButtonDown:     DrawExistBitmap(&dc,down_bitmap,normal_bitmap);     break;    case BitmapButtonDClick:     //DrawExistBitmap(&dc,down_bitmap,normal_bitmap);     break;    case BitmapButtonDisable:     //DrawExistBitmap(&dc,disable_bitmap,normal_bitmap);     break;    default:   {   int width = DoGetBestSize().GetWidth();   int height = DoGetBestSize().GetHeight();   wxClientDC dc(this);   dc.SetPen(*wxGREY_PEN);   dc.SetBrush(*wxTRANSPARENT_BRUSH);      dc.DrawRectangle(0, 0, width, height);   /*wxRect rc = wxRect(0, 0, width, height);   dc.DrawRoundedRectangle(rc,5);*/      wxPoint pt[3];   pt[0].x = 1;   pt[0].y = height-1;   pt[1].x = pt[1].y = 1;   pt[2].x = width-1;   pt[2].y = 1;   dc.SetPen(*wxWHITE_PEN);   dc.DrawLines(3,pt);      pt[1].x = width-1;   pt[1].y = height-1;   dc.SetPen(*wxBLACK_PEN);   dc.DrawLines(3,pt);      int x = normal_bitmap->GetWidth();   int y = (height-normal_bitmap->GetHeight())/2.0;   dc.DrawBitmap(*normal_bitmap, width-x-5, y, true);      if (text.IsEmpty())   {    break;   }      if (!text_font.IsNull())   {    dc.SetFont(text_font);   }   int pointsize = text_font.GetPointSize();   //dc.SetLayoutDirection(wxLayout_Default);      int bit = text.Find('n');   if (bit!=-1)   {    wxString str;    str = text.Left(bit);    dc.DrawText(str,5,height/2-pointsize-2);       int length = text.Length();    str = text.Mid(bit+1,length-bit-1);    dc.DrawText(str,5,height/2);   }   else   {    dc.DrawText(text,5,height/2-7);   }   }      break;   }     }     void wxBitmapButtonEx::DrawBackground(wxDC* dc)  {   if (is_used_bg)   {    dc->DrawBitmap(background_bitmap, 0, 0, true);   } else   {    wxBrush brush(GetBackgroundColour());    wxPen pen(GetBackgroundColour());    dc->SetBrush(brush);    dc->SetPen(pen);    dc->DrawRectangle(0, 0, GetSize().x, GetSize().y);   }  }     void wxBitmapButtonEx::OnEnter(wxMouseEvent& event)  {   /* button_status = BitmapButtonEnter;   Refresh();   Update();*/  }     void wxBitmapButtonEx::OnLeave(wxMouseEvent& event)  {   if (!IsEnabled())   {    return;   }   button_status = BitmapButtonLeave;   Refresh();   Update();  }     void wxBitmapButtonEx::OnDClick(wxMouseEvent& event)  {   /* button_status = BitmapButtonDown;   Refresh(false);   Update();*/  }     void wxBitmapButtonEx::OnDown(wxMouseEvent& event)  {   button_status = BitmapButtonDown;   Refresh();   Update();  }     void wxBitmapButtonEx::OnUp(wxMouseEvent& event)  {   if (BitmapButtonDown != button_status)   {    return;   }   button_status = BitmapButtonUp;   Refresh();   Update();   wxCommandEvent myEvent(wxEVT_COMMAND_BUTTON_CLICKED, GetId());   myEvent.SetEventObject(this);   GetEventHandler()->ProcessEvent(myEvent);  }     wxBitmapButtonEx* wxBitmapButtonEx::set_normal_bitmap(wxBitmap* bitmap)  {   normal_bitmap = bitmap;   return this;  }     wxBitmapButtonEx* wxBitmapButtonEx::set_down_bitmap(wxBitmap* bitmap)  {   down_bitmap = bitmap;   return this;  }     wxBitmapButtonEx* wxBitmapButtonEx::set_enter_bitmap(wxBitmap* bitmap)  {   enter_bitmap = bitmap;   return this;  }     bool wxBitmapButtonEx::Enable(bool enable)  {   if (enable)   {    button_status = BitmapButtonNormal;   } else   {    button_status = BitmapButtonDisable;   }      Refresh(false);   Update();   return wxControl::Enable(enable);  }     bool wxBitmapButtonEx::Disable()  {   return Enable(false);  }     wxBitmapButtonEx* wxBitmapButtonEx::set_disable_bitmap(wxBitmap* bitmap)  {   disable_bitmap = bitmap;   return this;  }     wxBitmapButtonEx* wxBitmapButtonEx::set_background(const wxBitmap& bitmap)  {   is_used_bg = true;   background_bitmap = bitmap;   return this;  }     bool wxBitmapButtonEx::set_background_colour(const wxColour& colour)  {   is_used_bg = false;   return wxControl::SetBackgroundColour(colour);  }  //  void wxBitmapButtonEx::set_button_text(wxString str)  {   text = str;  }  //  void wxBitmapButtonEx::set_text_font(wxFont font)  {   text_font = font;  }

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