src/common/fontpickercmn.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/fontpickercmn.cpp
   3 // Purpose:     wxFontPickerCtrl class implementation
   4 // Author:      Francesco Montorsi
   5 // Modified by:
   6 // Created:     15/04/2006
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Francesco Montorsi
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/fontpicker.h"
  28 #include "wx/fontenum.h"
  29 #include "wx/tokenzr.h"
  30
  31
  32 // ============================================================================
  33 // implementation
  34 // ============================================================================
  35
  36 #if wxUSE_FONTPICKERCTRL
  37
  38 DEFINE_EVENT_TYPE(wxEVT_COMMAND_FONTPICKER_CHANGED)
  39 IMPLEMENT_DYNAMIC_CLASS(wxFontPickerCtrl, wxPickerBase)
  40 IMPLEMENT_DYNAMIC_CLASS(wxFontPickerEvent, wxCommandEvent)
  41
  42 // ----------------------------------------------------------------------------
  43 // wxFontPickerCtrl
  44 // ----------------------------------------------------------------------------
  45
  46 #define M_PICKER     ((wxFontPickerWidget*)m_picker)
  47
  48 bool wxFontPickerCtrl::Create( wxWindow *parent, wxWindowID id,
  49                         const wxFont &initial,
  50                         const wxPoint &pos, const wxSize &size,
  51                         long style, const wxValidator& validator,
  52                         const wxString &name )
  53 {
  54     // by default, the textctrl is, if present, as big as the picker, for wxFontPickerCtrl
  55     SetTextCtrlProportion(1);
  56
  57     if (!wxPickerBase::CreateBase(parent, id, Font2String(initial),
  58                                   pos, size, style, validator, name))
  59         return false;
  60
  61     // the picker of a wxFontPickerCtrl is a wxFontPickerWidget
  62     m_picker = new wxFontPickerWidget(this, wxID_ANY, initial,
  63                                       wxDefaultPosition, wxDefaultSize,
  64                                       GetPickerStyle(style));
  65     m_picker->Connect(wxEVT_COMMAND_FONTPICKER_CHANGED,
  66             wxFontPickerEventHandler(wxFontPickerCtrl::OnFontChange),
  67             NULL, this);
  68
  69     return true;
  70 }
  71
  72 wxString wxFontPickerCtrl::Font2String(const wxFont &f)
  73 {
  74     wxString ret = f.GetNativeFontInfoUserDesc();
  75 #ifdef __WXMSW__
  76     // on wxMSW the encoding of the font is appended at the end of the string;
  77     // since encoding is not very user-friendly we remove it.
  78     wxFontEncoding enc = f.GetEncoding();
  79     if ( enc != wxFONTENCODING_DEFAULT && enc != wxFONTENCODING_SYSTEM )
  80         ret = ret.BeforeLast(wxT(' '));
  81 #endif
  82     return ret;
  83 }
  84
  85 wxFont wxFontPickerCtrl::String2Font(const wxString &s)
  86 {
  87     wxString str(s);
  88     wxFont ret;
  89     double n;
  90
  91     // put a limit on the maximum point size which the user can enter
  92     // NOTE: we suppose the last word of given string is the pointsize
  93     wxString size = str.AfterLast(wxT(' '));
  94     if (size.ToDouble(&n))
  95     {
  96         if (n < 1)
  97             str = str.Left(str.Len() - size.Len()) + wxT("1");
  98         else if (n >= m_nMaxPointSize)
  99             str = str.Left(str.Len() - size.Len()) +
 100                   wxString::Format(wxT("%d"), m_nMaxPointSize);
 101     }
 102
 103     if (!ret.SetNativeFontInfoUserDesc(str))
 104         return wxNullFont;
 105
 106     return ret;
 107 }
 108
 109 void wxFontPickerCtrl::SetSelectedFont(const wxFont &f)
 110 {
 111     M_PICKER->SetSelectedFont(f);
 112     UpdateTextCtrlFromPicker();
 113 }
 114
 115 void wxFontPickerCtrl::UpdatePickerFromTextCtrl()
 116 {
 117     wxASSERT(m_text);
 118
 119     if (m_bIgnoreNextTextCtrlUpdate)
 120     {
 121         // ignore this update
 122         m_bIgnoreNextTextCtrlUpdate = false;
 123         return;
 124     }
 125
 126     // NB: we don't use the wxFont::wxFont(const wxString &) constructor
 127     //     since that constructor expects the native font description
 128     //     string returned by wxFont::GetNativeFontInfoDesc() and not
 129     //     the user-friendly one returned by wxFont::GetNativeFontInfoUserDesc()
 130     wxFont f = String2Font(m_text->GetValue());
 131     if (!f.Ok())
 132         return;     // invalid user input
 133
 134     if (M_PICKER->GetSelectedFont() != f)
 135     {
 136         M_PICKER->SetSelectedFont(f);
 137
 138         // fire an event
 139         wxFontPickerEvent event(this, GetId(), f);
 140         GetEventHandler()->ProcessEvent(event);
 141     }
 142 }
 143
 144 void wxFontPickerCtrl::UpdateTextCtrlFromPicker()
 145 {
 146     if (!m_text)
 147         return;     // no textctrl to update
 148
 149     // NOTE: this SetValue() will generate an unwanted wxEVT_COMMAND_TEXT_UPDATED
 150     //       which will trigger a unneeded UpdateFromTextCtrl(); thus before using
 151     //       SetValue() we set the m_bIgnoreNextTextCtrlUpdate flag...
 152     m_bIgnoreNextTextCtrlUpdate = true;
 153     m_text->SetValue(Font2String(M_PICKER->GetSelectedFont()));
 154 }
 155
 156
 157
 158 // ----------------------------------------------------------------------------
 159 // wxFontPickerCtrl - event handlers
 160 // ----------------------------------------------------------------------------
 161
 162 void wxFontPickerCtrl::OnFontChange(wxFontPickerEvent &ev)
 163 {
 164     UpdateTextCtrlFromPicker();
 165
 166     // the wxFontPickerWidget sent us a colour-change notification.
 167     // forward this event to our parent
 168     wxFontPickerEvent event(this, GetId(), ev.GetFont());
 169     GetEventHandler()->ProcessEvent(event);
 170 }
 171
 172 #endif  // wxUSE_FONTPICKERCTRL