codeblocks+wxWidgets绘图

最近要用codeblocks+wxWidgets做一个实验的结果图，采用的版本是codeblocksSVN完美配置绿色版，SVN6852，下载地址http://bt.neu6.edu.cn/viewthread.php?tid=692508&highlight=codeblocks

之所以采用这个版本是因为不需配置，方便快速做完现在手头上的东西。

新建工程，选择wxWidgets Project：

第一步之后是一个欢迎界面，无需理会，next;

弹出窗口提示选择wxWidgets的版本，我下的版本集成了2.8.x，选好后点击next；

设置路径和工程名：

 

 

输入作者信息，不理会，next；

选择使用的GUI类型，我做的功能比较简单，直接选None，next

 

输入wxWidgets的路径，由于利用了绿色版，也无需设置，保留$(#wx)这个全局符号，继续一路next；

最后工程建好，工程列表如下：

替换wxDrawApp.cpp中的内容：

 

#include "wxDrawApp.h"

//(*AppHeaders
#include "wxDrawMain.h"
#include <wx/image.h>

IMPLEMENT_APP(MyApp)

bool MyApp::OnInit()
{

    Line *line = new Line(wxT("Line"));
    line->Show(true);

    return true;
}

 

更改wxDrawMain.cpp中的内容：

 

#include "wxDrawMain.h"
Line::Line(const wxString& title)
       : wxFrame(NULL, wxID_ANY, title, wxDefaultPosition, wxSize(280, 180))
{
  this->Connect(wxEVT_PAINT, wxPaintEventHandler(Line::OnPaint));
  this->Centre();
}


void Line::OnPaint(wxPaintEvent& event)
{
    wxPaintDC dc(this);

    // 绘制线段
    wxCoord x1 = 50, y1 = 60;
    wxCoord x2 = 190, y2 = 60;

    dc.DrawLine(x1, y1, x2, y2);
}

 

更改wxDrawApp.h中的内容：

 

 

#include <wx/wx.h>

class MyApp : public wxApp
{
  public:
    virtual bool OnInit();
};

更改wxDrawMain.h中的内容：

 

#include <wx/wx.h>

class Line : public wxFrame
{
public:
    Line(const wxString& title);
    void OnPaint(wxPaintEvent& event);
};

 

这些代码任何有过一点MFC、C++经验的人都可以看懂，新建了一个Line类，重载了库中的OnPaint函数，完成绘制一条线段的功能；

效果如下：

 

 OnPaint响应函数中的内容可以进行修改，完成各种复杂的绘制，下面粘贴一点有用的代码实例：

 

void Line::OnPaint(wxPaintEvent& event)
{
    wxPaintDC dc(this);

    // 绘制线段
    wxCoord x1 = 50, y1 = 60;
    wxCoord x2 = 190, y2 = 60;

    dc.DrawLine(x1, y1, x2, y2);

    // 添加文字
    dc.DrawText(wxT("fjsadk"), 40, 60);
    dc.DrawText(wxT("fwefdecd"), 70, 80);

    // 点
    dc.DrawPoint(10,10);
    dc.DrawPoint(10,20);
    dc.DrawPoint(20,10);
    dc.DrawPoint(20,20);

    // 画笔
    wxColour col1, col2;

    col1.Set(wxT("#0c0c0c"));
    col2.Set(wxT("#000000"));

    wxBrush brush(wxColour(255, 255, 255), wxTRANSPARENT);
    dc.SetBrush(brush);

    dc.SetPen(wxPen(col1, 1, wxSOLID));
    dc.DrawRectangle(10, 15, 90, 60);

    dc.SetPen(wxPen(col1, 1, wxDOT));
    dc.DrawRectangle(130, 15, 90, 60);

    dc.SetPen(wxPen(col1, 1, wxLONG_DASH));
    dc.DrawRectangle(250, 15, 90, 60);

    dc.SetPen(wxPen(col1, 1, wxSHORT_DASH));
    dc.DrawRectangle(10, 105, 90, 60);

    dc.SetPen(wxPen(col1, 1, wxDOT_DASH));
    dc.DrawRectangle(130, 105, 90, 60);

    dc.SetPen(wxPen(col1, 1, wxTRANSPARENT));
    dc.DrawRectangle(250, 105, 90, 60);

    // 绘制图形
    wxColour gray, white, red, blue;
    wxColour orange, green, brown;

    gray.Set(wxT("#d4d4d4"));
    white.Set(wxT("#ffffff"));
    red.Set(wxT("#ff0000"));
    orange.Set(wxT("#fa8e00"));
    green.Set(wxT("#619e1b"));
    brown.Set(wxT("#715b33"));
    blue.Set(wxT("#0d0060"));

    dc.SetPen(wxPen(gray));

    dc.DrawRectangle(20, 20, 50, 50);
    dc.DrawRectangle(30, 40, 50, 50);

    dc.SetBrush(wxBrush(white));
    dc.DrawRectangle(100, 20, 50, 50);
    dc.DrawRectangle(110, 40, 50, 50);
    wxRegion region1(100, 20, 50, 50);
    wxRegion region2(110, 40, 50, 50);
    region1.Intersect(region2);
    wxRect rect1 = region1.GetBox();
    dc.SetClippingRegion(region1);
    dc.SetBrush(wxBrush(red));
    dc.DrawRectangle(rect1);
    dc.DestroyClippingRegion();

    dc.SetBrush(wxBrush(white));
    dc.DrawRectangle(180, 20, 50, 50);
    dc.DrawRectangle(190, 40, 50, 50);
    wxRegion region3(180, 20, 50, 50);
    wxRegion region4(190, 40, 50, 50);
    region3.Union(region4);
    dc.SetClippingRegion(region3);
    wxRect rect2 = region3.GetBox();
    dc.SetBrush(wxBrush(orange));
    dc.DrawRectangle(rect2);
    dc.DestroyClippingRegion();

    dc.SetBrush(wxBrush(white));
    dc.DrawRectangle(20, 120, 50, 50);
    dc.DrawRectangle(30, 140, 50, 50);
    wxRegion region5(20, 120, 50, 50);
    wxRegion region6(30, 140, 50, 50);
    region5.Xor(region6);
    wxRect rect3 = region5.GetBox();
    dc.SetClippingRegion(region5);
    dc.SetBrush(wxBrush(green));
    dc.DrawRectangle(rect3);
    dc.DestroyClippingRegion();

    dc.SetBrush(wxBrush(white));
    dc.DrawRectangle(100, 120, 50, 50);
    dc.DrawRectangle(110, 140, 50, 50);
    wxRegion region7(100, 120, 50, 50);
    wxRegion region8(110, 140, 50, 50);
    region7.Subtract(region8);
    wxRect rect4 = region7.GetBox();
    dc.SetClippingRegion(region7);
    dc.SetBrush(wxBrush(brown));
    dc.DrawRectangle(rect4);
    dc.DestroyClippingRegion();

    dc.SetBrush(white);
    dc.DrawRectangle(180, 120, 50, 50);
    dc.DrawRectangle(190, 140, 50, 50);
    wxRegion region9(180, 120, 50, 50);
    wxRegion region10(190, 140, 50, 50);
    region10.Subtract(region9);
    wxRect rect5 = region10.GetBox();
    dc.SetClippingRegion(region10);
    dc.SetBrush(wxBrush(blue));
    dc.DrawRectangle(rect5);
    dc.DestroyClippingRegion();

}