src/common/pickerbase.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/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 #ifndef WX_PRECOMP
  30     #include "wx/textctrl.h"
  31 #endif
  32
  33 // ============================================================================
  34 // implementation
  35 // ============================================================================
  36
  37 IMPLEMENT_ABSTRACT_CLASS(wxPickerBase, wxWindow)
  38
  39 // ----------------------------------------------------------------------------
  40 // wxPickerBase
  41 // ----------------------------------------------------------------------------
  42
  43 wxPickerBase::~wxPickerBase()
  44 {
  45     // destroy the windows we are managing: these are not automatically
  46     // destroyed by wxWindow because they are not built as our children
  47     // but rather as children of the parent of the wxPickerBase class
  48     // (since wxPickerBase does not represent a real window)
  49     if (m_text) m_text->Destroy();
  50     if (m_picker) m_picker->Destroy();
  51 }
  52
  53 bool wxPickerBase::CreateBase(wxWindow *parent,
  54                          wxWindowID id,
  55                          const wxString &text,
  56                          const wxPoint& pos,
  57                          const wxSize& size,
  58                          long style,
  59                          const wxValidator& validator,
  60                          const wxString& name)
  61 {
  62     // remove any border style from our style as wxPickerBase's window must be
  63     // invisible (user styles must be set on the textctrl or the platform-dependent picker)
  64     style &= ~wxBORDER_MASK;
  65     if (!wxControl::Create(parent, id, pos, size, style | wxNO_BORDER | wxTAB_TRAVERSAL,
  66                             validator, name))
  67         return false;
  68
  69     if (HasFlag(wxPB_USE_TEXTCTRL))
  70     {
  71         // NOTE: the style of this class (wxPickerBase) and the style of the
  72         //       attached text control are different: GetTextCtrlStyle() extracts
  73         //       the styles related to the textctrl from the styles passed here
  74         m_text = new wxTextCtrl(this, wxID_ANY, wxEmptyString, wxPoint(0, 0),
  75                                 wxSize(40, size.GetHeight()), GetTextCtrlStyle(style));
  76         if (!m_text)
  77         {
  78             wxFAIL_MSG( wxT("wxPickerBase's textctrl creation failed") );
  79             return false;
  80         }
  81
  82         // set the maximum lenght allowed for this textctrl.
  83         // This is very important since any change to it will trigger an update in
  84         // the m_picker; for very long strings, this real-time synchronization could
  85         // become a CPU-blocker and thus should be avoided.
  86         // 32 characters will be more than enough for all common uses.
  87         m_text->SetMaxLength(32);
  88
  89         // set the initial contents of the textctrl
  90         m_text->SetValue(text);
  91
  92         m_text->Connect(wxEVT_COMMAND_TEXT_UPDATED,
  93                 wxCommandEventHandler(wxPickerBase::OnTextCtrlUpdate),
  94                 NULL, this);
  95         m_text->Connect(wxEVT_KILL_FOCUS,
  96                 wxFocusEventHandler(wxPickerBase::OnTextCtrlKillFocus),
  97                 NULL, this);
  98
  99         m_text->Connect(wxEVT_DESTROY,
 100                 wxWindowDestroyEventHandler(wxPickerBase::OnTextCtrlDelete),
 101                 NULL, this);
 102     }
 103
 104     return true;
 105 }
 106
 107 void wxPickerBase::OnTextCtrlKillFocus(wxFocusEvent &)
 108 {
 109     wxASSERT(m_text);
 110
 111     // don't leave the textctrl empty
 112     if (m_text->GetValue().empty())
 113         UpdateTextCtrlFromPicker();
 114 }
 115
 116 void wxPickerBase::OnTextCtrlDelete(wxWindowDestroyEvent &)
 117 {
 118     // the textctrl has been deleted; our pointer is invalid!
 119     m_text = NULL;
 120 }
 121
 122 void wxPickerBase::OnTextCtrlUpdate(wxCommandEvent &)
 123 {
 124     // for each text-change, update the picker
 125     UpdatePickerFromTextCtrl();
 126 }
 127
 128 int wxPickerBase::GetTextCtrlWidth(int given)
 129 {
 130     // compute the width of m_text like a wxBoxSizer(wxHORIZONTAL) would do
 131     // NOTE: the proportion of m_picker is fixed to 1
 132     return ((given - m_margin) / (m_textProportion + 1)) * m_textProportion;
 133 }
 134
 135 void wxPickerBase::DoSetSizeHints(int minW, int minH, int maxW, int maxH, int incW, int incH)
 136 {
 137     wxControl::DoSetSizeHints(minW, minH, maxW, maxH, incW, incH);
 138
 139     if (m_text)
 140     {
 141         // compute minWidth and maxWidth of the ausiliary textctrl
 142         int textCtrlMinW = -1, textCtrlMaxW = -1;
 143         if (minW != -1)
 144         {
 145             textCtrlMinW = GetTextCtrlWidth(minW);
 146             minW -= textCtrlMinW + m_margin;
 147         }
 148
 149         if (maxW != -1)
 150         {
 151             textCtrlMaxW = GetTextCtrlWidth(maxW);
 152             maxW -= textCtrlMaxW + m_margin;
 153         }
 154
 155         m_text->SetSizeHints(textCtrlMinW, minH, textCtrlMaxW, maxH, incW, incH);
 156     }
 157
 158     if (m_picker)
 159         m_picker->SetSizeHints(minW, minH, maxW, maxH, incW, incH);
 160 }
 161
 162 void wxPickerBase::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 163 {
 164     wxControl::DoSetSize(x, y, width, height, sizeFlags);
 165
 166     int pickerx = 0;
 167     if (m_text)
 168     {
 169         // compute width of the ausiliary textctrl
 170         int textCtrlW = GetTextCtrlWidth(width);
 171
 172         // set the m_text's position relatively to this window
 173         m_text->SetSize(0, 0, textCtrlW, height, sizeFlags);
 174
 175         // change position of the real picker
 176         pickerx += textCtrlW + m_margin;
 177         width -= textCtrlW + m_margin;
 178     }
 179
 180     if (m_picker)
 181         m_picker->SetSize(pickerx, 0, width, height, sizeFlags);
 182 }
 183
 184 wxSize wxPickerBase::DoGetBestSize() const
 185 {
 186     wxSize ret = m_picker->GetBestSize();
 187
 188     if (m_text)
 189     {
 190         wxSize sz = m_text->GetBestSize();
 191
 192         ret.SetWidth( ret.GetWidth() + sz.GetWidth() + m_margin );
 193         ret.SetHeight( wxMax(ret.GetHeight(), sz.GetHeight()) );
 194     }
 195
 196     return ret;
 197 }
 198
 199 void wxPickerBase::SetInternalMargin(int newmargin)
 200 {
 201     m_margin = newmargin;
 202 }