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