include/wx/gbsizer.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        gbsizer.h
   3 // Purpose:     wxGridBagSizer:  A sizer that can lay out items in a grid,
   4 //              with items at specified cells, and with the option of row
   5 //              and/or column spanning
   6 //
   7 // Author:      Robin Dunn
   8 // Created:     03-Nov-2003
   9 // RCS-ID:      $Id$
  10 // Copyright:   (c) Robin Dunn
  11 // Licence:     wxWindows licence
  12 /////////////////////////////////////////////////////////////////////////////
  13
  14 #ifndef __WXGBSIZER_H__
  15 #define __WXGBSIZER_H__
  16
  17 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  18 #pragma interface "gbsizer.h"
  19 #endif
  20
  21 #include "wx/sizer.h"
  22
  23
  24 //---------------------------------------------------------------------------
  25 // Classes to represent a position in the grid and a size of an item in the
  26 // grid, IOW, the number of rows and columns it occupies.  I chose to use these
  27 // instead of wxPoint and wxSize because they are (x,y) and usually pixel
  28 // oriented whild grids and tables are usually thought of as (row,col) so some
  29 // confusion would definitly result in using wxPoint...
  30 //
  31 // NOTE: This should probably be refactored to a common RowCol data type which
  32 // is used for this and also for wxGridCellCoords.
  33 //---------------------------------------------------------------------------
  34
  35 class WXDLLEXPORT wxGBPosition
  36 {
  37 public:
  38     wxGBPosition() : m_row(0), m_col(0) {}
  39     wxGBPosition(int row, int col) : m_row(row), m_col(col) {}
  40
  41     // default copy ctor and assignment operator are okay.
  42
  43     int GetRow() const { return m_row; }
  44     int GetCol() const { return m_col; }
  45     void SetRow(int row) { m_row = row; }
  46     void SetCol(int col) { m_col = col; }
  47
  48     bool operator==(const wxGBPosition& p) const { return m_row == p.m_row && m_col == p.m_col; }
  49     bool operator!=(const wxGBPosition& p) const { return !(*this == p); }
  50
  51 private:
  52     int m_row;
  53     int m_col;
  54 };
  55
  56
  57 class WXDLLEXPORT wxGBSpan
  58 {
  59 public:
  60     wxGBSpan() : m_rowspan(1), m_colspan(1) {}
  61     wxGBSpan(int rowspan, int colspan) : m_rowspan(rowspan), m_colspan(colspan) {}
  62
  63     // default copy ctor and assignment operator are okay.
  64
  65     int GetRowspan() const { return m_rowspan; }
  66     int GetColspan() const { return m_colspan; }
  67     void SetRowspan(int rowspan) { m_rowspan = rowspan; }
  68     void SetColspan(int colspan) { m_colspan = colspan; }
  69
  70     bool operator==(const wxGBSpan& o) const { return m_rowspan == o.m_rowspan && m_colspan == o.m_colspan; }
  71     bool operator!=(const wxGBSpan& o) const { return !(*this == o); }
  72
  73 private:
  74     int m_rowspan;
  75     int m_colspan;
  76 };
  77
  78
  79 WXDLLEXPORT_DATA(extern const wxGBSpan) wxDefaultSpan;
  80
  81
  82 //---------------------------------------------------------------------------
  83 // wxGBSizerItem
  84 //---------------------------------------------------------------------------
  85
  86 class WXDLLEXPORT wxGridBagSizer;
  87
  88
  89 class WXDLLEXPORT wxGBSizerItem : public wxSizerItem
  90 {
  91 public:
  92     // spacer
  93     wxGBSizerItem( int width,
  94                    int height,
  95                    const wxGBPosition& pos,
  96                    const wxGBSpan& span,
  97                    int flag,
  98                    int border,
  99                    wxObject* userData);
 100
 101     // window
 102     wxGBSizerItem( wxWindow *window,
 103                    const wxGBPosition& pos,
 104                    const wxGBSpan& span,
 105                    int flag,
 106                    int border,
 107                    wxObject* userData );
 108
 109     // subsizer
 110     wxGBSizerItem( wxSizer *sizer,
 111                    const wxGBPosition& pos,
 112                    const wxGBSpan& span,
 113                    int flag,
 114                    int border,
 115                    wxObject* userData );
 116
 117     // default ctor
 118     wxGBSizerItem();
 119
 120
 121     // Get the grid position of the item
 122     wxGBPosition GetPos() const { return m_pos; }
 123     void GetPos(int& row, int& col) const;
 124
 125     // Get the row and column spanning of the item
 126     wxGBSpan GetSpan() const { return m_span; }
 127     void GetSpan(int& rowspan, int& colspan) const;
 128
 129     // If the item is already a member of a sizer then first ensure that there
 130     // is no other item that would intersect with this one at the new
 131     // position, then set the new position.  Returns true if the change is
 132     // successful and after the next Layout the item will be moved.
 133     bool SetPos( const wxGBPosition& pos );
 134
 135     // If the item is already a member of a sizer then first ensure that there
 136     // is no other item that would intersect with this one with its new
 137     // spanning size, then set the new spanning.  Returns true if the change
 138     // is successful and after the next Layout the item will be resized.
 139     bool SetSpan( const wxGBSpan& span );
 140
 141     // Returns true if this item and the other item instersect
 142     bool Intersects(const wxGBSizerItem& other);
 143
 144     // Returns true if the given pos/span would intersect with this item.
 145     bool Intersects(const wxGBPosition& pos, const wxGBSpan& span);
 146
 147     // Get the row and column of the endpoint of this item
 148     void GetEndPos(int& row, int& col);
 149
 150
 151     wxGridBagSizer* GetSizer() const { return m_sizer; }
 152     void SetSizer(wxGridBagSizer* sizer) { m_sizer = sizer; }
 153
 154
 155 protected:
 156     wxGBPosition    m_pos;
 157     wxGBSpan        m_span;
 158     wxGridBagSizer* m_sizer;
 159
 160
 161 private:
 162     DECLARE_DYNAMIC_CLASS(wxGBSizerItem)
 163     DECLARE_NO_COPY_CLASS(wxGBSizerItem)
 164 };
 165
 166
 167 //---------------------------------------------------------------------------
 168 // wxGridBagSizer
 169 //---------------------------------------------------------------------------
 170
 171
 172 class WXDLLEXPORT wxGridBagSizer : public wxFlexGridSizer
 173 {
 174 public:
 175     wxGridBagSizer(int vgap = 0, int hgap = 0 );
 176
 177     // The Add methods return true if the item was successfully placed at the
 178     // given position, false if something was already there.
 179     bool Add( wxWindow *window,
 180               const wxGBPosition& pos,
 181               const wxGBSpan& span = wxDefaultSpan,
 182               int flag = 0,
 183               int border = 0,
 184               wxObject* userData = NULL );
 185     bool Add( wxSizer *sizer,
 186               const wxGBPosition& pos,
 187               const wxGBSpan& span = wxDefaultSpan,
 188               int flag = 0,
 189               int border = 0,
 190               wxObject* userData = NULL );
 191     bool Add( int width,
 192               int height,
 193               const wxGBPosition& pos,
 194               const wxGBSpan& span = wxDefaultSpan,
 195               int flag = 0,
 196               int border = 0,
 197               wxObject* userData = NULL );
 198     bool Add( wxGBSizerItem *item );
 199
 200
 201     // Get/Set the size used for cells in the grid with no item.
 202     wxSize GetEmptyCellSize() const          { return m_emptyCellSize; }
 203     void SetEmptyCellSize(const wxSize& sz)  { m_emptyCellSize = sz; }
 204
 205     // Get the grid position of the specified item (non-recursive)
 206     wxGBPosition GetItemPosition(wxWindow *window);
 207     wxGBPosition GetItemPosition(wxSizer *sizer);
 208     wxGBPosition GetItemPosition(size_t index);
 209
 210     // Set the grid position of the specified item.  Returns true on success.
 211     // If the move is not allowed (because an item is already there) then
 212     // false is returned.   (non-recursive)
 213     bool SetItemPosition(wxWindow *window, const wxGBPosition& pos);
 214     bool SetItemPosition(wxSizer *sizer, const wxGBPosition& pos);
 215     bool SetItemPosition(size_t index, const wxGBPosition& pos);
 216
 217     // Get the row/col spanning of the specified item (non-recursive)
 218     wxGBSpan GetItemSpan(wxWindow *window);
 219     wxGBSpan GetItemSpan(wxSizer *sizer);
 220     wxGBSpan GetItemSpan(size_t index);
 221
 222     // Set the row/col spanning of the specified item. Returns true on
 223     // success.  If the move is not allowed (because an item is already there)
 224     // then false is returned. (non-recursive)
 225     bool SetItemSpan(wxWindow *window, const wxGBSpan& span);
 226     bool SetItemSpan(wxSizer *sizer, const wxGBSpan& span);
 227     bool SetItemSpan(size_t index, const wxGBSpan& span);
 228
 229
 230     // Find the sizer item for the given window or subsizer, returns NULL if
 231     // not found. (non-recursive)
 232     wxGBSizerItem* FindItem(wxWindow* window);
 233     wxGBSizerItem* FindItem(wxSizer* sizer);
 234
 235
 236     // Return the sizer item for the given grid cell, or NULL if there is no
 237     // item at that position. (non-recursive)
 238     wxGBSizerItem* FindItemAtPosition(const wxGBPosition& pos);
 239
 240
 241     // Return the sizer item that has a matching user data (it only compares
 242     // pointer values) or NULL if not found. (non-recursive)
 243     wxGBSizerItem* FindItemWithData(const wxObject* userData);
 244
 245
 246     // These are what make the sizer do size calculations and layout
 247     virtual void RecalcSizes();
 248     virtual wxSize CalcMin();
 249
 250
 251     // Look at all items and see if any intersect (or would overlap) the given
 252     // item.  Returns true if so, false if there would be no overlap.  If an
 253     // excludeItem is given then it will not be checked for intersection, for
 254     // example it may be the item we are checking the position of.
 255     bool CheckForIntersection(wxGBSizerItem* item, wxGBSizerItem* excludeItem = NULL);
 256     bool CheckForIntersection(const wxGBPosition& pos, const wxGBSpan& span, wxGBSizerItem* excludeItem = NULL);
 257
 258
 259     // The Add base class virtuals should not be used with this class, but
 260     // we'll try to make them automatically select a location for the item
 261     // anyway.
 262     virtual void Add( wxWindow *window, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 263     virtual void Add( wxSizer *sizer, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 264     virtual void Add( int width, int height, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 265
 266     // The Insert and Prepend base class virtuals that are not appropriate for
 267     // this class and should not be used.  Their implementation in this class
 268     // simply fails.
 269     virtual void Add( wxSizerItem *item );
 270     virtual void Insert( size_t index, wxWindow *window, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 271     virtual void Insert( size_t index, wxSizer *sizer, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 272     virtual void Insert( size_t index, int width, int height, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 273     virtual void Insert( size_t index, wxSizerItem *item );
 274     virtual void Prepend( wxWindow *window, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 275     virtual void Prepend( wxSizer *sizer, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 276     virtual void Prepend( int width,  int height,  int proportion = 0,  int flag = 0,  int border = 0,  wxObject* userData = NULL );
 277     virtual void Prepend( wxSizerItem *item );
 278
 279
 280 protected:
 281     wxGBPosition FindEmptyCell();
 282
 283     wxSize m_emptyCellSize;
 284
 285
 286 private:
 287
 288     DECLARE_CLASS(wxGridBagSizer)
 289     DECLARE_NO_COPY_CLASS(wxGridBagSizer)
 290 };
 291
 292 //---------------------------------------------------------------------------
 293 #endif