include/wx/generic/splitter.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        splitter.h
   3 // Purpose:     wxSplitterWindow class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef __SPLITTERH_G__
  13 #define __SPLITTERH_G__
  14
  15 #ifdef __GNUG__
  16     #pragma interface "splitter.h"
  17 #endif
  18
  19 #include "wx/window.h"                      // base class declaration
  20
  21 class WXDLLEXPORT wxSplitterEvent;
  22
  23 // ---------------------------------------------------------------------------
  24 // splitter constants
  25 // ---------------------------------------------------------------------------
  26
  27 enum
  28 {
  29     wxSPLIT_HORIZONTAL = 1,
  30     wxSPLIT_VERTICAL
  31 };
  32
  33 enum
  34 {
  35     wxSPLIT_DRAG_NONE,
  36     wxSPLIT_DRAG_DRAGGING,
  37     wxSPLIT_DRAG_LEFT_DOWN
  38 };
  39
  40 // ---------------------------------------------------------------------------
  41 // wxSplitterWindow maintains one or two panes, with
  42 // an optional vertical or horizontal split which
  43 // can be used with the mouse or programmatically.
  44 // ---------------------------------------------------------------------------
  45
  46 // TODO:
  47 // 1) Perhaps make the borders sensitive to dragging in order to create a split.
  48 //    The MFC splitter window manages scrollbars as well so is able to
  49 //    put sash buttons on the scrollbars, but we probably don't want to go down
  50 //    this path.
  51 // 2) for wxWindows 2.0, we must find a way to set the WS_CLIPCHILDREN style
  52 //    to prevent flickering. (WS_CLIPCHILDREN doesn't work in all cases so can't be
  53 //    standard).
  54
  55 class WXDLLEXPORT wxSplitterWindow: public wxWindow
  56 {
  57 public:
  58
  59 ////////////////////////////////////////////////////////////////////////////
  60 // Public API
  61
  62     // Default constructor
  63     wxSplitterWindow()
  64     {
  65         Init();
  66     }
  67
  68     // Normal constructor
  69     wxSplitterWindow(wxWindow *parent, wxWindowID id = -1,
  70                      const wxPoint& pos = wxDefaultPosition,
  71                      const wxSize& size = wxDefaultSize,
  72                      long style = wxSP_3D|wxCLIP_CHILDREN,
  73                      const wxString& name = "splitter")
  74     {
  75         Init();
  76         Create(parent, id, pos, size, style, name);
  77     }
  78
  79     ~wxSplitterWindow();
  80
  81     bool Create(wxWindow *parent, wxWindowID id = -1,
  82                      const wxPoint& pos = wxDefaultPosition,
  83                      const wxSize& size = wxDefaultSize,
  84                      long style = wxSP_3D|wxCLIP_CHILDREN,
  85                      const wxString& name = "splitter");
  86
  87     // Gets the only or left/top pane
  88     wxWindow *GetWindow1() const { return m_windowOne; }
  89
  90     // Gets the right/bottom pane
  91     wxWindow *GetWindow2() const { return m_windowTwo; }
  92
  93     // Sets the split mode
  94     void SetSplitMode(int mode) { m_splitMode = mode; }
  95
  96     // Gets the split mode
  97     int GetSplitMode() const { return m_splitMode; };
  98
  99     // Initialize with one window
 100     void Initialize(wxWindow *window);
 101
 102     // Associates the given window with window 2, drawing the appropriate sash
 103     // and changing the split mode.
 104     // Does nothing and returns FALSE if the window is already split.
 105     // A sashPosition of 0 means choose a default sash position,
 106     // negative sashPosition specifies the size of right/lower pane as it's
 107     // absolute value rather than the size of left/upper pane.
 108     virtual bool SplitVertically(wxWindow *window1,
 109                                  wxWindow *window2,
 110                                  int sashPosition = 0);
 111     virtual bool SplitHorizontally(wxWindow *window1,
 112                                    wxWindow *window2,
 113                                    int sashPosition = 0);
 114
 115     // Removes the specified (or second) window from the view
 116     // Doesn't actually delete the window.
 117     bool Unsplit(wxWindow *toRemove = (wxWindow *) NULL);
 118
 119     // Replaces one of the windows with another one (neither old nor new
 120     // parameter should be NULL)
 121     bool ReplaceWindow(wxWindow *winOld, wxWindow *winNew);
 122
 123     // Is the window split?
 124     bool IsSplit() const { return (m_windowTwo != NULL); }
 125
 126     // Sets the sash size
 127     void SetSashSize(int width) { m_sashSize = width; }
 128
 129     // Sets the border size
 130     void SetBorderSize(int width) { m_borderSize = width; }
 131
 132     // Gets the sash size
 133     int GetSashSize() const { return m_sashSize; }
 134
 135     // Gets the border size
 136     int GetBorderSize() const { return m_borderSize; }
 137
 138     // Set the sash position
 139     void SetSashPosition(int position, bool redraw = TRUE);
 140
 141     // Gets the sash position
 142     int GetSashPosition() const { return m_sashPosition; }
 143
 144     // If this is zero, we can remove panes by dragging the sash.
 145     void SetMinimumPaneSize(int min) { m_minimumPaneSize = min; }
 146     int GetMinimumPaneSize() const { return m_minimumPaneSize; }
 147
 148     // Called when the sash position is about to be changed, return
 149     // FALSE from here to prevent the change from taking place.
 150     // Repositions sash to minimum position if pane would be too small.
 151     // newSashPosition here is always positive or zero.
 152     virtual bool OnSashPositionChange(int WXUNUSED(newSashPosition))
 153         { return TRUE; }
 154
 155     // If the sash is moved to an extreme position, a subwindow
 156     // is removed from the splitter window, and the app is
 157     // notified. The app should delete or hide the window.
 158     virtual void OnUnsplit(wxWindow *WXUNUSED(removed)) { }
 159
 160     // Called when the sash is double-clicked.
 161     // The default behaviour is to remove the sash if the
 162     // minimum pane size is zero.
 163     virtual void OnDoubleClickSash(int WXUNUSED(x), int WXUNUSED(y)) { }
 164
 165 ////////////////////////////////////////////////////////////////////////////
 166 // Implementation
 167
 168     // Paints the border and sash
 169     void OnPaint(wxPaintEvent& event);
 170
 171     // Handles mouse events
 172     void OnMouseEvent(wxMouseEvent& ev);
 173
 174     // Adjusts the panes
 175     void OnSize(wxSizeEvent& event);
 176
 177     // In live mode, resize child windows in idle time
 178     void OnIdle(wxIdleEvent& event);
 179
 180     // Draws borders
 181     virtual void DrawBorders(wxDC& dc);
 182
 183     // Draws the sash
 184     virtual void DrawSash(wxDC& dc);
 185
 186     // Draws the sash tracker (for whilst moving the sash)
 187     virtual void DrawSashTracker(int x, int y);
 188
 189     // Tests for x, y over sash
 190     virtual bool SashHitTest(int x, int y, int tolerance = 2);
 191
 192     // Resizes subwindows
 193     virtual void SizeWindows();
 194
 195     // Initialize colours
 196     void InitColours();
 197
 198     void SetNeedUpdating(bool needUpdating) { m_needUpdating = needUpdating; }
 199     bool GetNeedUpdating() const { return m_needUpdating ; }
 200
 201 protected:
 202     // our event handlers
 203     void OnSashPosChanged(wxSplitterEvent& event);
 204     void OnSashPosChanging(wxSplitterEvent& event);
 205     void OnDoubleClick(wxSplitterEvent& event);
 206     void OnUnsplitEvent(wxSplitterEvent& event);
 207     void OnSetCursor(wxSetCursorEvent& event);
 208
 209     void SendUnsplitEvent(wxWindow *winRemoved);
 210
 211 protected:
 212     void Init();
 213
 214
 215     int         m_splitMode;
 216     bool        m_permitUnsplitAlways;
 217     bool        m_needUpdating; // when in live mode, set this to TRUE to resize children in idle
 218     wxWindow*   m_windowOne;
 219     wxWindow*   m_windowTwo;
 220     int         m_dragMode;
 221     int         m_oldX;
 222     int         m_oldY;
 223     int         m_borderSize;
 224     int         m_sashSize;     // Sash width or height
 225     int         m_sashPosition; // Number of pixels from left or top
 226     int         m_firstX;
 227     int         m_firstY;
 228     int         m_minimumPaneSize;
 229     wxCursor*   m_sashCursorWE;
 230     wxCursor*   m_sashCursorNS;
 231     wxPen*      m_sashTrackerPen;
 232     wxPen*      m_lightShadowPen;
 233     wxPen*      m_mediumShadowPen;
 234     wxPen*      m_darkShadowPen;
 235     wxPen*      m_hilightPen;
 236     wxBrush*    m_faceBrush;
 237     wxPen*      m_facePen;
 238
 239 private:
 240     DECLARE_DYNAMIC_CLASS(wxSplitterWindow)
 241     DECLARE_EVENT_TABLE()
 242 };
 243
 244 // ----------------------------------------------------------------------------
 245 // event class and macros
 246 // ----------------------------------------------------------------------------
 247
 248 // we reuse the same class for all splitter event types because this is the
 249 // usual wxWin convention, but the three event types have different kind of
 250 // data associated with them, so the accessors can be only used if the real
 251 // event type matches with the one for which the accessors make sense
 252 class WXDLLEXPORT wxSplitterEvent : public wxCommandEvent
 253 {
 254 public:
 255     wxSplitterEvent(wxEventType type = wxEVT_NULL,
 256                     wxSplitterWindow *splitter = (wxSplitterWindow *)NULL)
 257         : wxCommandEvent(type)
 258     {
 259         SetEventObject(splitter);
 260         if (splitter) m_id = splitter->GetId();
 261     }
 262
 263     // SASH_POS_CHANGED methods
 264
 265     // setting the sash position to -1 prevents the change from taking place at
 266     // all
 267     void SetSashPosition(int pos)
 268     {
 269         wxASSERT( GetEventType() == wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED
 270                 || GetEventType() == wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING);
 271
 272         m_data.pos = pos;
 273     }
 274
 275     int GetSashPosition() const
 276     {
 277         wxASSERT( GetEventType() == wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED
 278                 || GetEventType() == wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING);
 279
 280         return m_data.pos;
 281     }
 282
 283     // UNSPLIT event methods
 284     wxWindow *GetWindowBeingRemoved() const
 285     {
 286         wxASSERT( GetEventType() == wxEVT_COMMAND_SPLITTER_UNSPLIT );
 287
 288         return m_data.win;
 289     }
 290
 291     // DCLICK event methods
 292     int GetX() const
 293     {
 294         wxASSERT( GetEventType() == wxEVT_COMMAND_SPLITTER_DOUBLECLICKED );
 295
 296         return m_data.pt.x;
 297     }
 298
 299     int GetY() const
 300     {
 301         wxASSERT( GetEventType() == wxEVT_COMMAND_SPLITTER_DOUBLECLICKED );
 302
 303         return m_data.pt.y;
 304     }
 305
 306 private:
 307     friend class WXDLLEXPORT wxSplitterWindow;
 308
 309     // data for the different types of event
 310     union
 311     {
 312         int pos;            // position for SASH_POS_CHANGED event
 313         wxWindow *win;      // window being removed for UNSPLIT event
 314         struct
 315         {
 316             int x, y;
 317         } pt;               // position of double click for DCLICK event
 318     } m_data;
 319
 320     DECLARE_DYNAMIC_CLASS(wxSplitterEvent)
 321 };
 322
 323 typedef void (wxEvtHandler::*wxSplitterEventFunction)(wxSplitterEvent&);
 324
 325 #define EVT_SPLITTER_SASH_POS_CHANGED(id, fn)                               \
 326   {                                                                         \
 327     wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,                                \
 328     id,                                                                     \
 329     -1,                                                                     \
 330     (wxObjectEventFunction)(wxEventFunction)(wxSplitterEventFunction) &fn,  \
 331     NULL                                                                    \
 332   },
 333
 334 #define EVT_SPLITTER_SASH_POS_CHANGING(id, fn)                              \
 335   {                                                                         \
 336     wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING,                               \
 337     id,                                                                     \
 338     -1,                                                                     \
 339     (wxObjectEventFunction)(wxEventFunction)(wxSplitterEventFunction) &fn,  \
 340     NULL                                                                    \
 341   },
 342
 343 #define EVT_SPLITTER_DCLICK(id, fn)                                         \
 344   {                                                                         \
 345     wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,                                   \
 346     id,                                                                     \
 347     -1,                                                                     \
 348     (wxObjectEventFunction)(wxEventFunction)(wxSplitterEventFunction) &fn,  \
 349     NULL                                                                    \
 350   },
 351
 352 #define EVT_SPLITTER_UNSPLIT(id, fn)                                        \
 353   {                                                                         \
 354     wxEVT_COMMAND_SPLITTER_UNSPLIT,                                         \
 355     id,                                                                     \
 356     -1,                                                                     \
 357     (wxObjectEventFunction)(wxEventFunction)(wxSplitterEventFunction) &fn,  \
 358     NULL                                                                    \
 359   },
 360
 361 #endif // __SPLITTERH_G__