wxWidgets 自绘按钮（图片+文字）

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;
}