src/common/pickerbase.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/pickerbase.cpp
   3 // Purpose:     wxPickerBase 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/pickerbase.h"
  28
  29
  30 // ============================================================================
  31 // implementation
  32 // ============================================================================
  33
  34 IMPLEMENT_ABSTRACT_CLASS(wxPickerBase, wxWindow)
  35
  36 // ----------------------------------------------------------------------------
  37 // wxPickerBase
  38 // ----------------------------------------------------------------------------
  39
  40 wxPickerBase::~wxPickerBase()
  41 {
  42     // destroy the windows we are managing: these are not automatically
  43     // destroyed by wxWindow because they are not built as our children
  44     // but rather as children of the parent of the wxPickerBase class
  45     // (since wxPickerBase does not represent a real window)
  46     if (m_text) m_text->Destroy();
  47     if (m_picker) m_picker->Destroy();
  48 }
  49
  50 bool wxPickerBase::CreateBase(wxWindow *parent,
  51                          wxWindowID id,
  52                          const wxString &text,
  53                          const wxPoint& pos,
  54                          const wxSize& size,
  55                          long style,
  56                          const wxValidator& validator,
  57                          const wxString& name)
  58 {
  59     // remove any border style from our style as wxPickerBase's window must be
  60     // invisible (user styles must be set on the textctrl or the platform-dependent picker)
  61     style &= ~wxBORDER_MASK;
  62     if (!wxControl::Create(parent, id, pos, size, style | wxNO_BORDER | wxTAB_TRAVERSAL,
  63                             validator, name))
  64         return false;
  65
  66     if (HasFlag(wxPB_USE_TEXTCTRL))
  67     {
  68         // NOTE: the style of this class (wxPickerBase) and the style of the
  69         //       attached text control are different: GetTextCtrlStyle() extracts
  70         //       the styles related to the textctrl from the styles passed here
  71         m_text = new wxTextCtrl(this, wxID_ANY, wxEmptyString, wxPoint(0, 0),
  72                                 wxSize(40, size.GetHeight()), GetTextCtrlStyle(style));
  73         if (!m_text)
  74         {
  75             wxFAIL_MSG( wxT("wxPickerBase's textctrl creation failed") );
  76             return false;
  77         }
  78
  79         // set the maximum lenght allowed for this textctrl.
  80         // This is very important since any change to it will trigger an update in
  81         // the m_picker; for very long strings, this real-time synchronization could
  82         // become a CPU-blocker and thus should be avoided.
  83         // 32 characters will be more than enough for all common uses.
  84         m_text->SetMaxLength(32);
  85
  86         // set the initial contents of the textctrl
  87         m_text->SetValue(text);
  88
  89         m_text->Connect(wxEVT_COMMAND_TEXT_UPDATED,
  90                 wxCommandEventHandler(wxPickerBase::OnTextCtrlUpdate),
  91                 NULL, this);
  92         m_text->Connect(wxEVT_KILL_FOCUS,
  93                 wxFocusEventHandler(wxPickerBase::OnTextCtrlKillFocus),
  94                 NULL, this);
  95
  96         m_text->Connect(wxEVT_DESTROY,
  97                 wxWindowDestroyEventHandler(wxPickerBase::OnTextCtrlDelete),
  98                 NULL, this);
  99     }
 100
 101     return true;
 102 }
 103
 104 void wxPickerBase::OnTextCtrlKillFocus(wxFocusEvent &)
 105 {
 106     wxASSERT(m_text);
 107
 108     // don't leave the textctrl empty
 109     if (m_text->GetValue().IsEmpty())
 110         UpdateTextCtrlFromPicker();
 111 }
 112
 113 void wxPickerBase::OnTextCtrlDelete(wxWindowDestroyEvent &)
 114 {
 115     // the textctrl has been deleted; our pointer is invalid!
 116     m_text = NULL;
 117 }
 118
 119 void wxPickerBase::OnTextCtrlUpdate(wxCommandEvent &)
 120 {
 121     // for each text-change, update the picker
 122     UpdatePickerFromTextCtrl();
 123 }
 124
 125 int wxPickerBase::GetTextCtrlWidth(int given)
 126 {
 127     // compute the width of m_text like a wxBoxSizer(wxHORIZONTAL) would do
 128     // NOTE: the proportion of m_picker is fixed to 1
 129     return ((given - m_margin) / (m_textProportion + 1)) * m_textProportion;
 130 }
 131
 132 void wxPickerBase::DoSetSizeHints(int minW, int minH, int maxW, int maxH, int incW, int incH)
 133 {
 134     wxControl::DoSetSizeHints(minW, minH, maxW, maxH, incW, incH);
 135
 136     if (m_text)
 137     {
 138         // compute minWidth and maxWidth of the ausiliary textctrl
 139         int textCtrlMinW = -1, textCtrlMaxW = -1;
 140         if (minW != -1)
 141         {
 142             textCtrlMinW = GetTextCtrlWidth(minW);
 143             minW -= textCtrlMinW + m_margin;
 144         }
 145
 146         if (maxW != -1)
 147         {
 148             textCtrlMaxW = GetTextCtrlWidth(maxW);
 149             maxW -= textCtrlMaxW + m_margin;
 150         }
 151
 152         m_text->SetSizeHints(textCtrlMinW, minH, textCtrlMaxW, maxH, incW, incH);
 153     }
 154
 155     if (m_picker)
 156         m_picker->SetSizeHints(minW, minH, maxW, maxH, incW, incH);
 157 }
 158
 159 void wxPickerBase::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 160 {
 161     wxControl::DoSetSize(x, y, width, height, sizeFlags);
 162
 163     int pickerx = 0;
 164     if (m_text)
 165     {
 166         // compute width of the ausiliary textctrl
 167         int textCtrlW = GetTextCtrlWidth(width);
 168
 169         // set the m_text's position relatively to this window
 170         m_text->SetSize(0, 0, textCtrlW, height, sizeFlags);
 171
 172         // change position of the real picker
 173         pickerx += textCtrlW + m_margin;
 174         width -= textCtrlW + m_margin;
 175     }
 176
 177     if (m_picker)
 178         m_picker->SetSize(pickerx, 0, width, height, sizeFlags);
 179 }
 180
 181 wxSize wxPickerBase::DoGetBestSize() const
 182 {
 183     wxSize ret = m_picker->GetBestSize();
 184
 185     if (m_text)
 186     {
 187         wxSize sz = m_text->GetBestSize();
 188
 189         ret.SetWidth( ret.GetWidth() + sz.GetWidth() + m_margin );
 190         ret.SetHeight( wxMax(ret.GetHeight(), sz.GetHeight()) );
 191     }
 192
 193     return ret;
 194 }