[C++知识库]46、wxWidgets自定义控件1

?一、自定义控件MyPanel

class MyPanel:public wxPanel
{
public:
? ? MyPanel(wxPanel* parent);
? ? int GetCurWidth(){return cur_width;};
? ? void SetCurWidth(int n){cur_width = n;};

protected:
? ? void OnSize(wxSizeEvent& event);
? ? void OnPaint(wxPaintEvent& event);

? ? wxPanel* m_parent;
? ? int cur_width;

};

int num[] = {0,75,150,225,300,375,450,525,600,675};
int asize = sizeof(num) / sizeof(num[0]);

MyPanel::MyPanel(wxPanel* parent)
? ? :wxPanel(parent,wxID_ANY)
{
// ? ?m_parent = parent;
? ? int cur_width = 1;
? ? this->SetMinSize(wxSize(300,30));

? ? Bind(wxEVT_PAINT,wxPaintEventHandler(MyPanel::OnPaint),this);
? ? Bind(wxEVT_SIZE,wxSizeEventHandler(MyPanel::OnSize),this);

? ? this->SetAutoLayout(true);
}

void MyPanel::OnSize(wxSizeEvent& event)
{
? ? Refresh();
}

void MyPanel::OnPaint(wxPaintEvent& event)
{
? ? wxFont font(9,wxFONTFAMILY_DEFAULT
? ? ? ? ? ? ? ? ,wxFONTSTYLE_NORMAL
? ? ? ? ? ? ? ? ,wxFONTWEIGHT_NORMAL
? ? ? ? ? ? ? ? ,false
? ? ? ? ? ? ? ? ,"Arial"
? ? ? ? ? ? ? ? );
? ? font.SetSymbolicSize(wxFONTSIZE_SMALL );

? ? wxPaintDC dc(this);
? ? dc.SetFont(font);

? ? wxSize sz = this->GetSize();
? ? int width = sz.GetWidth();

? ? int step = (int) round(width / 10.0);

? ? int till = (int) ((width / 750.0) * cur_width);
? ? int full = (int) ((width / 750.0) * 700);

? ? dc.DrawLine(0,0,full,0);

? ? if (cur_width >= 675)
? ? {
? ? ? ? dc.SetPen(wxPen(wxColour(255,255,184)));
? ? ? ? dc.SetBrush(wxBrush(wxColour(255,255,184)));
? ? ? ? dc.DrawRectangle(0,0,full,30);

? ? ? ? dc.SetPen(wxPen(wxColour(255,175,175)));
? ? ? ? dc.SetBrush(wxBrush(wxColour(255,175,175)));
? ? ? ? dc.DrawRectangle(full,0,till - full,30);
? ? }
? ? else
? ? {
? ? ? ? dc.SetPen(*wxYELLOW);
? ? ? ? dc.SetBrush(*wxYELLOW);
? ? ? ? dc.DrawRectangle(0,0,till,30);
? ? }

? ? dc.SetPen(*wxBLACK);
? ? for(int i =0; i< asize ;i++)
? ? {
? ? ? ? wxSize msz = dc.GetTextExtent(wxString::Format("%d",num[i]));
? ? ? ? dc.DrawText(wxString::Format("%d",num[i])
? ? ? ? ? ? ? ? ? ? ,i*step - msz.GetWidth()/2
? ? ? ? ? ? ? ? ? ? ,8
? ? ? ? ? ? ? ? ? ? );
? ? ? ? dc.DrawLine(i*step,0,i*step,6);

? ? }

}
?

二、主程序

class Simple:public wxFrame
{
public:
? ? Simple(const wxString& title);

? ? int GetCurWidth(){return cur_width;};

protected:
? ? void OnScroll(wxScrollEvent& event);

? ? wxPanel* panel;
? ? wxSlider* m_slider;
? ? MyPanel* m_wid;

? ? int cur_width;

};

Simple::Simple(const wxString& title)
? ? :wxFrame(NULL,-1,title)
{
? ? cur_width = 75;

? ? panel = new wxPanel(this,wxID_ANY);
? ? wxPanel* centerPanel = new wxPanel(panel,wxID_ANY);

? ? m_slider = new wxSlider(centerPanel,wxID_ANY,75,0,750,wxPoint(-1,-1),wxSize(150,-1),wxSL_LABELS);

? ? wxBoxSizer* vbox = new wxBoxSizer(wxVERTICAL);
? ? wxBoxSizer* hbox = new wxBoxSizer(wxHORIZONTAL);
? ? wxBoxSizer* hbox2 = new wxBoxSizer(wxHORIZONTAL);
? ? wxBoxSizer* hbox3 = new wxBoxSizer(wxHORIZONTAL);

? ? m_wid = new MyPanel(panel);
? ? m_wid->SetCurWidth(cur_width);

? ? hbox->Add(m_wid,1,wxEXPAND);
? ? hbox2->Add(centerPanel,1,wxEXPAND);
? ? hbox3->Add(m_slider,0,wxTOP|wxLEFT,35);

? ? centerPanel->SetSizer(hbox3);

? ? vbox->Add(hbox2,1,wxEXPAND);
? ? vbox->Add(hbox,0,wxEXPAND);

? ? panel->SetSizer(vbox);
? ? m_slider->SetFocus();

? ? Bind(wxEVT_COMMAND_SLIDER_UPDATED
? ? ? ? ?,wxScrollEventHandler(Simple::OnScroll)
? ? ? ? ?,this
? ? ? ? ?,m_slider->GetId());

? ? Centre();
}

void Simple::OnScroll(wxScrollEvent& event)
{
? ? cur_width = m_slider->GetValue();

? ? m_wid->SetCurWidth(cur_width);
? ? m_wid->Refresh();

}
?