include/wx/control.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/control.h
   3 // Purpose:     wxControl common interface
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     26.07.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_CONTROL_H_BASE_
  13 #define _WX_CONTROL_H_BASE_
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 #include "wx/defs.h"
  20
  21 #if wxUSE_CONTROLS
  22
  23 #include "wx/window.h"      // base class
  24
  25 extern WXDLLIMPEXP_DATA_CORE(const char) wxControlNameStr[];
  26
  27
  28 // ----------------------------------------------------------------------------
  29 // Ellipsize() constants
  30 // ----------------------------------------------------------------------------
  31
  32 enum wxEllipsizeFlags
  33 {
  34     wxELLIPSIZE_FLAGS_NONE = 0,
  35     wxELLIPSIZE_FLAGS_PROCESS_MNEMONICS = 1,
  36     wxELLIPSIZE_FLAGS_EXPAND_TABS = 2,
  37
  38     wxELLIPSIZE_FLAGS_DEFAULT = wxELLIPSIZE_FLAGS_PROCESS_MNEMONICS |
  39                                 wxELLIPSIZE_FLAGS_EXPAND_TABS
  40 };
  41
  42 // NB: Don't change the order of these values, they're the same as in
  43 //     PangoEllipsizeMode enum.
  44 enum wxEllipsizeMode
  45 {
  46     wxELLIPSIZE_NONE,
  47     wxELLIPSIZE_START,
  48     wxELLIPSIZE_MIDDLE,
  49     wxELLIPSIZE_END
  50 };
  51
  52 // ----------------------------------------------------------------------------
  53 // wxControl is the base class for all controls
  54 // ----------------------------------------------------------------------------
  55
  56 class WXDLLIMPEXP_CORE wxControlBase : public wxWindow
  57 {
  58 public:
  59     wxControlBase() { }
  60
  61     virtual ~wxControlBase();
  62
  63     // Create() function adds the validator parameter
  64     bool Create(wxWindow *parent, wxWindowID id,
  65                 const wxPoint& pos = wxDefaultPosition,
  66                 const wxSize& size = wxDefaultSize,
  67                 long style = 0,
  68                 const wxValidator& validator = wxDefaultValidator,
  69                 const wxString& name = wxControlNameStr);
  70
  71     // get the control alignment (left/right/centre, top/bottom/centre)
  72     int GetAlignment() const { return m_windowStyle & wxALIGN_MASK; }
  73
  74     // set label with mnemonics
  75     virtual void SetLabel(const wxString& label)
  76     {
  77         m_labelOrig = label;
  78
  79         InvalidateBestSize();
  80
  81         wxWindow::SetLabel(label);
  82     }
  83
  84     // return the original string, as it was passed to SetLabel()
  85     // (i.e. with wx-style mnemonics)
  86     virtual wxString GetLabel() const { return m_labelOrig; }
  87
  88     // set label text (mnemonics will be escaped)
  89     virtual void SetLabelText(const wxString& text)
  90     {
  91         SetLabel(EscapeMnemonics(text));
  92     }
  93
  94     // get just the text of the label, without mnemonic characters ('&')
  95     virtual wxString GetLabelText() const { return GetLabelText(GetLabel()); }
  96
  97
  98     // Set the label with markup (and mnemonics). Markup is a simple subset of
  99     // HTML with tags such as <b>, <i> and <span>. By default it is not
 100     // supported i.e. all the markup is simply stripped and SetLabel() is
 101     // called but some controls in some ports do support this already and in
 102     // the future most of them should.
 103     //
 104     // Notice that, being HTML-like, markup also supports XML entities so '<'
 105     // should be encoded as "&lt;" and so on, a bare '<' in the input will
 106     // likely result in an error. As an exception, a bare '&' is allowed and
 107     // indicates that the next character is a mnemonic. To insert a literal '&'
 108     // in the control you need to use "&amp;" in the input string.
 109     //
 110     // Returns true if the label was set, even if the markup in it was ignored.
 111     // False is only returned if we failed to parse the label.
 112     bool SetLabelMarkup(const wxString& markup)
 113     {
 114         return DoSetLabelMarkup(markup);
 115     }
 116
 117
 118     // controls by default inherit the colours of their parents, if a
 119     // particular control class doesn't want to do it, it can override
 120     // ShouldInheritColours() to return false
 121     virtual bool ShouldInheritColours() const { return true; }
 122
 123
 124     // WARNING: this doesn't work for all controls nor all platforms!
 125     //
 126     // simulates the event of given type (i.e. wxButton::Command() is just as
 127     // if the button was clicked)
 128     virtual void Command(wxCommandEvent &event);
 129
 130     virtual bool SetFont(const wxFont& font);
 131
 132     // wxControl-specific processing after processing the update event
 133     virtual void DoUpdateWindowUI(wxUpdateUIEvent& event);
 134
 135
 136
 137     // static utilities for mnemonics char (&) handling
 138     // ------------------------------------------------
 139
 140     // returns the given string without mnemonic characters ('&')
 141     static wxString GetLabelText(const wxString& label);
 142
 143     // returns the given string without mnemonic characters ('&')
 144     // this function is identic to GetLabelText() and is provided for clarity
 145     // and for symmetry with the wxStaticText::RemoveMarkup() function.
 146     static wxString RemoveMnemonics(const wxString& str);
 147
 148     // escapes (by doubling them) the mnemonics
 149     static wxString EscapeMnemonics(const wxString& str);
 150
 151
 152     // miscellaneous static utilities
 153     // ------------------------------
 154
 155     // replaces parts of the given (multiline) string with an ellipsis if needed
 156     static wxString Ellipsize(const wxString& label, const wxDC& dc,
 157                               wxEllipsizeMode mode, int maxWidth,
 158                               int flags = wxELLIPSIZE_FLAGS_DEFAULT);
 159
 160     // return the accel index in the string or -1 if none and puts the modified
 161     // string into second parameter if non NULL
 162     static int FindAccelIndex(const wxString& label,
 163                               wxString *labelOnly = NULL);
 164
 165     // this is a helper for the derived class GetClassDefaultAttributes()
 166     // implementation: it returns the right colours for the classes which
 167     // contain something else (e.g. wxListBox, wxTextCtrl, ...) instead of
 168     // being simple controls (such as wxButton, wxCheckBox, ...)
 169     static wxVisualAttributes
 170         GetCompositeControlsDefaultAttributes(wxWindowVariant variant);
 171
 172 protected:
 173     // choose the default border for this window
 174     virtual wxBorder GetDefaultBorder() const;
 175
 176     // creates the control (calls wxWindowBase::CreateBase inside) and adds it
 177     // to the list of parents children
 178     bool CreateControl(wxWindowBase *parent,
 179                        wxWindowID id,
 180                        const wxPoint& pos,
 181                        const wxSize& size,
 182                        long style,
 183                        const wxValidator& validator,
 184                        const wxString& name);
 185
 186     // This function may be overridden in the derived classes to implement
 187     // support for labels with markup. The base class version simply strips the
 188     // markup and calls SetLabel() with the remaining text.
 189     virtual bool DoSetLabelMarkup(const wxString& markup);
 190
 191
 192     // initialize the common fields of wxCommandEvent
 193     void InitCommandEvent(wxCommandEvent& event) const;
 194
 195     // Ellipsize() helper:
 196     static wxString DoEllipsizeSingleLine(const wxString& label, const wxDC& dc,
 197                                           wxEllipsizeMode mode, int maxWidth,
 198                                           int replacementWidth);
 199
 200     // Remove markup from the given string, returns empty string on error i.e.
 201     // if markup was syntactically invalid.
 202     static wxString RemoveMarkup(const wxString& markup);
 203
 204
 205     // this field contains the label in wx format, i.e. with '&' mnemonics,
 206     // as it was passed to the last SetLabel() call
 207     wxString m_labelOrig;
 208
 209     wxDECLARE_NO_COPY_CLASS(wxControlBase);
 210 };
 211
 212 // ----------------------------------------------------------------------------
 213 // include platform-dependent wxControl declarations
 214 // ----------------------------------------------------------------------------
 215
 216 #if defined(__WXUNIVERSAL__)
 217     #include "wx/univ/control.h"
 218 #elif defined(__WXPALMOS__)
 219     #include "wx/palmos/control.h"
 220 #elif defined(__WXMSW__)
 221     #include "wx/msw/control.h"
 222 #elif defined(__WXMOTIF__)
 223     #include "wx/motif/control.h"
 224 #elif defined(__WXGTK20__)
 225     #include "wx/gtk/control.h"
 226 #elif defined(__WXGTK__)
 227     #include "wx/gtk1/control.h"
 228 #elif defined(__WXMAC__)
 229     #include "wx/osx/control.h"
 230 #elif defined(__WXCOCOA__)
 231     #include "wx/cocoa/control.h"
 232 #elif defined(__WXPM__)
 233     #include "wx/os2/control.h"
 234 #endif
 235
 236 #endif // wxUSE_CONTROLS
 237
 238 #endif
 239     // _WX_CONTROL_H_BASE_