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 #ifdef __GNUG__
  13 #pragma implementation
  14 #pragma interface
  15 #endif
  16
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/wx.h"
  25 #endif
  26
  27 #include <fstream.h>
  28
  29 #include "NPApp.h"
  30 #include "NPFrame.h"
  31
  32 // Define a new application type
  33 class MyApp: public wxPluginApp
  34 { public:
  35     virtual bool OnInit(void);
  36     virtual wxPluginFrame* OnNewInstance(const wxPluginData& data);
  37 };
  38
  39 // Define a new frame type
  40 class MyFrame: public wxPluginFrame
  41 { public:
  42     MyFrame(const wxPluginData& data);
  43
  44  public:
  45     // Let's paint directly onto the 'frame'; we don't need a subwindow
  46     void OnPaint(wxPaintEvent& event);
  47     void OnDraw(wxDC& dc);
  48     void OnMouseEvent(wxMouseEvent& event);
  49
  50     // Called when the file has been downloaded
  51     virtual void OnNPNewFile(NPStream *stream, const wxString& fname);
  52
  53     void CentreStrings(wxDC& dc);
  54
  55    DECLARE_EVENT_TABLE()
  56
  57  protected:
  58     wxStringList    m_strings;
  59     long            m_xpos;
  60     long            m_ypos;
  61 };
  62
  63 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  64         EVT_SIZE(MyFrame::OnSize)
  65         EVT_PAINT(MyFrame::OnPaint)
  66         EVT_MOUSE_EVENTS(MyFrame::OnMouseEvent)
  67 END_EVENT_TABLE()
  68
  69 IMPLEMENT_APP(MyApp)
  70
  71 // No app initialisation necessary, and for a plugin there is no
  72 // top frame.
  73 bool MyApp::OnInit(void)
  74 {
  75     return TRUE;
  76 }
  77
  78 // Called whenever a new plugin instance is called. We could check
  79 // various things here in 'data' but we won't bother.
  80 wxPluginFrame* MyApp::OnNewInstance(const wxPluginData& data)
  81 {
  82     // Implicitly added to list of plugin frames
  83     return new MyFrame(data);
  84 }
  85
  86 // My frame constructor
  87 MyFrame::MyFrame(const wxPluginData& data):
  88   wxPluginFrame(data)
  89 {
  90     m_xpos = -1;
  91     m_ypos = -1;
  92 }
  93
  94 void MyFrame::OnPaint(wxPaintEvent& event)
  95 {
  96     wxPaintDC dc(this);
  97
  98     OnDraw(dc);
  99 }
 100
 101 void MyFrame::OnDraw(wxDC& dc)
 102 {
 103     dc.SetBrush(*wxCYAN_BRUSH);
 104     dc.SetPen(*wxRED_PEN);
 105
 106     int w, h;
 107     GetClientSize(&w, &h);
 108
 109     dc.DrawRectangle(0, 0, w, h);
 110
 111     wxFont swissFont(10, wxSWISS, wxNORMAL, wxNORMAL);
 112     dc.SetFont(swissFont);
 113     dc.SetBackgroundMode(wxTRANSPARENT);
 114
 115     CentreStrings(dc);
 116 }
 117
 118 // Called when the file has been downloaded
 119 void MyFrame::OnNPNewFile(NPStream *stream, const wxString& fname)
 120 {
 121     ifstream str(fname);
 122     char buf[201];
 123
 124     while ( !str.eof() )
 125     {
 126         buf[0] = 0;
 127         str.getline(buf, 200);
 128
 129         if ( buf[0] != 0 )
 130             m_strings.Add(buf);
 131     }
 132     Refresh();
 133 }
 134
 135 void MyFrame::CentreStrings(wxDC& dc)
 136 {
 137     int y = 5;
 138     int cw, ch;
 139     GetClientSize(&cw, &ch);
 140
 141     wxNode *node = m_strings.First();
 142     while ( node )
 143     {
 144         char *s = (char *)node->Data();
 145         long w, h;
 146         dc.GetTextExtent(s, &w, &h);
 147
 148         int x = wxMax(0, (cw - w)/2);
 149         dc.DrawText(s, x, y);
 150
 151         y += h + (h/2);
 152
 153         node = node->Next();
 154     }
 155 }
 156
 157 // This implements a tiny doodling program. Drag the mouse using
 158 // the left button.
 159 void MyFrame::OnMouseEvent(wxMouseEvent& event)
 160 {
 161   long x, y;
 162   event.Position(&x, &y);
 163   wxClientDC dc(this);
 164
 165   if (m_xpos > -1 && m_ypos > -1 && event.Dragging() && event.LeftIsDown())
 166   {
 167     dc.SetPen(wxBLACK_PEN);
 168     dc.SetBrush(wxTRANSPARENT_BRUSH);
 169     dc.DrawLine(m_xpos, m_ypos, x, y);
 170   }
 171   m_xpos = x;
 172   m_ypos = y;
 173 }
 174