utils/nplugin/samples/simple/simple.cpp

   1 /*
   2  * File:        simple.cpp
   3  * Purpose:     Minimal wxWidgets plugin
   4  * Author:      Julian Smart
   5  * Created:     1997
   6  * Updated:
   7  * Copyright:   (c) Julian Smart
   8  */
   9
  10 /* static const char sccsid[] = "%W% %G%"; */
  11
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15 #pragma hdrstop
  16 #endif
  17
  18 #ifndef WX_PRECOMP
  19 #include "wx/wx.h"
  20 #endif
  21
  22 #include <fstream.h>
  23
  24 #include "NPApp.h"
  25 #include "NPFrame.h"
  26
  27 // Define a new application type
  28 class MyApp: public wxPluginApp
  29 { public:
  30     virtual bool OnInit(void);
  31     virtual wxPluginFrame* OnNewInstance(const wxPluginData& data);
  32 };
  33
  34 // Define a new frame type
  35 class MyFrame: public wxPluginFrame
  36 { public:
  37     MyFrame(const wxPluginData& data);
  38
  39  public:
  40     // Let's paint directly onto the 'frame'; we don't need a subwindow
  41     void OnPaint(wxPaintEvent& event);
  42     void OnDraw(wxDC& dc);
  43     void OnMouseEvent(wxMouseEvent& event);
  44
  45     // Called when the file has been downloaded
  46     virtual void OnNPNewFile(NPStream *stream, const wxString& fname);
  47
  48     void CentreStrings(wxDC& dc);
  49
  50    DECLARE_EVENT_TABLE()
  51
  52  protected:
  53     wxStringList    m_strings;
  54     long            m_xpos;
  55     long            m_ypos;
  56 };
  57
  58 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  59         EVT_SIZE(MyFrame::OnSize)
  60         EVT_PAINT(MyFrame::OnPaint)
  61         EVT_MOUSE_EVENTS(MyFrame::OnMouseEvent)
  62 END_EVENT_TABLE()
  63
  64 IMPLEMENT_APP(MyApp)
  65
  66 // No app initialisation necessary, and for a plugin there is no
  67 // top frame.
  68 bool MyApp::OnInit(void)
  69 {
  70     return TRUE;
  71 }
  72
  73 // Called whenever a new plugin instance is called. We could check
  74 // various things here in 'data' but we won't bother.
  75 wxPluginFrame* MyApp::OnNewInstance(const wxPluginData& data)
  76 {
  77     // Implicitly added to list of plugin frames
  78     return new MyFrame(data);
  79 }
  80
  81 // My frame constructor
  82 MyFrame::MyFrame(const wxPluginData& data):
  83   wxPluginFrame(data)
  84 {
  85     m_xpos = -1;
  86     m_ypos = -1;
  87 }
  88
  89 void MyFrame::OnPaint(wxPaintEvent& event)
  90 {
  91     wxPaintDC dc(this);
  92
  93     OnDraw(dc);
  94 }
  95
  96 void MyFrame::OnDraw(wxDC& dc)
  97 {
  98     dc.SetBrush(*wxCYAN_BRUSH);
  99     dc.SetPen(*wxRED_PEN);
 100
 101     int w, h;
 102     GetClientSize(&w, &h);
 103
 104     dc.DrawRectangle(0, 0, w, h);
 105
 106     wxFont swissFont(10, wxSWISS, wxNORMAL, wxNORMAL);
 107     dc.SetFont(swissFont);
 108     dc.SetBackgroundMode(wxTRANSPARENT);
 109
 110     CentreStrings(dc);
 111 }
 112
 113 // Called when the file has been downloaded
 114 void MyFrame::OnNPNewFile(NPStream *stream, const wxString& fname)
 115 {
 116     ifstream str(fname);
 117     char buf[201];
 118
 119     while ( !str.eof() )
 120     {
 121         buf[0] = 0;
 122         str.getline(buf, 200);
 123
 124         if ( buf[0] != 0 )
 125             m_strings.Add(buf);
 126     }
 127     Refresh();
 128 }
 129
 130 void MyFrame::CentreStrings(wxDC& dc)
 131 {
 132     int y = 5;
 133     int cw, ch;
 134     GetClientSize(&cw, &ch);
 135
 136     wxNode *node = m_strings.First();
 137     while ( node )
 138     {
 139         char *s = (char *)node->Data();
 140         long w, h;
 141         dc.GetTextExtent(s, &w, &h);
 142
 143         int x = wxMax(0, (cw - w)/2);
 144         dc.DrawText(s, x, y);
 145
 146         y += h + (h/2);
 147
 148         node = node->Next();
 149     }
 150 }
 151
 152 // This implements a tiny doodling program. Drag the mouse using
 153 // the left button.
 154 void MyFrame::OnMouseEvent(wxMouseEvent& event)
 155 {
 156   long x, y;
 157   event.Position(&x, &y);
 158   wxClientDC dc(this);
 159
 160   if (m_xpos > -1 && m_ypos > -1 && event.Dragging() && event.LeftIsDown())
 161   {
 162     dc.SetPen(wxBLACK_PEN);
 163     dc.SetBrush(wxTRANSPARENT_BRUSH);
 164     dc.DrawLine(m_xpos, m_ypos, x, y);
 165   }
 166   m_xpos = x;
 167   m_ypos = y;
 168 }
 169