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 #include "wx/sizer.h"
  18
  19
  20 //---------------------------------------------------------------------------
  21 // Classes to represent a position in the grid and a size of an item in the
  22 // grid, IOW, the number of rows and columns it occupies.  I chose to use these
  23 // instead of wxPoint and wxSize because they are (x,y) and usually pixel
  24 // oriented while grids and tables are usually thought of as (row,col) so some
  25 // confusion would definitely result in using wxPoint...
  26 //
  27 // NOTE: This should probably be refactored to a common RowCol data type which
  28 // is used for this and also for wxGridCellCoords.
  29 //---------------------------------------------------------------------------
  30
  31 class WXDLLIMPEXP_CORE wxGBPosition
  32 {
  33 public:
  34     wxGBPosition() : m_row(0), m_col(0) {}
  35     wxGBPosition(int row, int col) : m_row(row), m_col(col) {}
  36
  37     // default copy ctor and assignment operator are okay.
  38
  39     int GetRow() const { return m_row; }
  40     int GetCol() const { return m_col; }
  41     void SetRow(int row) { m_row = row; }
  42     void SetCol(int col) { m_col = col; }
  43
  44     bool operator==(const wxGBPosition& p) const { return m_row == p.m_row && m_col == p.m_col; }
  45     bool operator!=(const wxGBPosition& p) const { return !(*this == p); }
  46
  47 private:
  48     int m_row;
  49     int m_col;
  50 };
  51
  52
  53 class WXDLLIMPEXP_CORE wxGBSpan
  54 {
  55 public:
  56     wxGBSpan() { Init(); }
  57     wxGBSpan(int rowspan, int colspan)
  58     {
  59         // Initialize the members to valid values as not doing it may result in
  60         // infinite loop in wxGBSizer code if the user passed 0 for any of
  61         // them, see #12934.
  62         Init();
  63
  64         SetRowspan(rowspan);
  65         SetColspan(colspan);
  66     }
  67
  68     // default copy ctor and assignment operator are okay.
  69
  70     int GetRowspan() const { return m_rowspan; }
  71     int GetColspan() const { return m_colspan; }
  72     void SetRowspan(int rowspan)
  73     {
  74         wxCHECK_RET( rowspan > 0, "Row span should be strictly positive" );
  75
  76         m_rowspan = rowspan;
  77     }
  78
  79     void SetColspan(int colspan)
  80     {
  81         wxCHECK_RET( colspan > 0, "Column span should be strictly positive" );
  82
  83         m_colspan = colspan;
  84     }
  85
  86     bool operator==(const wxGBSpan& o) const { return m_rowspan == o.m_rowspan && m_colspan == o.m_colspan; }
  87     bool operator!=(const wxGBSpan& o) const { return !(*this == o); }
  88
  89 private:
  90     void Init()
  91     {
  92         m_rowspan =
  93         m_colspan = 1;
  94     }
  95
  96     int m_rowspan;
  97     int m_colspan;
  98 };
  99
 100
 101 extern WXDLLIMPEXP_DATA_CORE(const wxGBSpan) wxDefaultSpan;
 102
 103
 104 //---------------------------------------------------------------------------
 105 // wxGBSizerItem
 106 //---------------------------------------------------------------------------
 107
 108 class WXDLLIMPEXP_FWD_CORE wxGridBagSizer;
 109
 110
 111 class WXDLLIMPEXP_CORE wxGBSizerItem : public wxSizerItem
 112 {
 113 public:
 114     // spacer
 115     wxGBSizerItem( int width,
 116                    int height,
 117                    const wxGBPosition& pos,
 118                    const wxGBSpan& span,
 119                    int flag,
 120                    int border,
 121                    wxObject* userData);
 122
 123     // window
 124     wxGBSizerItem( wxWindow *window,
 125                    const wxGBPosition& pos,
 126                    const wxGBSpan& span,
 127                    int flag,
 128                    int border,
 129                    wxObject* userData );
 130
 131     // subsizer
 132     wxGBSizerItem( wxSizer *sizer,
 133                    const wxGBPosition& pos,
 134                    const wxGBSpan& span,
 135                    int flag,
 136                    int border,
 137                    wxObject* userData );
 138
 139     // default ctor
 140     wxGBSizerItem();
 141
 142
 143     // Get the grid position of the item
 144     wxGBPosition GetPos() const { return m_pos; }
 145     void GetPos(int& row, int& col) const;
 146
 147     // Get the row and column spanning of the item
 148     wxGBSpan GetSpan() const { return m_span; }
 149     void GetSpan(int& rowspan, int& colspan) const;
 150
 151     // If the item is already a member of a sizer then first ensure that there
 152     // is no other item that would intersect with this one at the new
 153     // position, then set the new position.  Returns true if the change is
 154     // successful and after the next Layout the item will be moved.
 155     bool SetPos( const wxGBPosition& pos );
 156
 157     // If the item is already a member of a sizer then first ensure that there
 158     // is no other item that would intersect with this one with its new
 159     // spanning size, then set the new spanning.  Returns true if the change
 160     // is successful and after the next Layout the item will be resized.
 161     bool SetSpan( const wxGBSpan& span );
 162
 163     // Returns true if this item and the other item instersect
 164     bool Intersects(const wxGBSizerItem& other);
 165
 166     // Returns true if the given pos/span would intersect with this item.
 167     bool Intersects(const wxGBPosition& pos, const wxGBSpan& span);
 168
 169     // Get the row and column of the endpoint of this item
 170     void GetEndPos(int& row, int& col);
 171
 172
 173     wxGridBagSizer* GetGBSizer() const { return m_gbsizer; }
 174     void SetGBSizer(wxGridBagSizer* sizer) { m_gbsizer = sizer; }
 175
 176
 177 protected:
 178     wxGBPosition    m_pos;
 179     wxGBSpan        m_span;
 180     wxGridBagSizer* m_gbsizer;  // so SetPos/SetSpan can check for intersects
 181
 182
 183 private:
 184     DECLARE_DYNAMIC_CLASS(wxGBSizerItem)
 185     wxDECLARE_NO_COPY_CLASS(wxGBSizerItem);
 186 };
 187
 188
 189 //---------------------------------------------------------------------------
 190 // wxGridBagSizer
 191 //---------------------------------------------------------------------------
 192
 193
 194 class WXDLLIMPEXP_CORE wxGridBagSizer : public wxFlexGridSizer
 195 {
 196 public:
 197     wxGridBagSizer(int vgap = 0, int hgap = 0 );
 198
 199     // The Add methods return true if the item was successfully placed at the
 200     // given position, false if something was already there.
 201     wxSizerItem* Add( wxWindow *window,
 202                       const wxGBPosition& pos,
 203                       const wxGBSpan& span = wxDefaultSpan,
 204                       int flag = 0,
 205                       int border = 0,
 206                       wxObject* userData = NULL );
 207     wxSizerItem* Add( wxSizer *sizer,
 208                       const wxGBPosition& pos,
 209                       const wxGBSpan& span = wxDefaultSpan,
 210                       int flag = 0,
 211                       int border = 0,
 212                       wxObject* userData = NULL );
 213     wxSizerItem* Add( int width,
 214                       int height,
 215                       const wxGBPosition& pos,
 216                       const wxGBSpan& span = wxDefaultSpan,
 217                       int flag = 0,
 218                       int border = 0,
 219                       wxObject* userData = NULL );
 220     wxSizerItem* Add( wxGBSizerItem *item );
 221
 222
 223     // Get/Set the size used for cells in the grid with no item.
 224     wxSize GetEmptyCellSize() const          { return m_emptyCellSize; }
 225     void SetEmptyCellSize(const wxSize& sz)  { m_emptyCellSize = sz; }
 226
 227     // Get the size of the specified cell, including hgap and vgap.  Only
 228     // valid after a Layout.
 229     wxSize GetCellSize(int row, int col) const;
 230
 231     // Get the grid position of the specified item (non-recursive)
 232     wxGBPosition GetItemPosition(wxWindow *window);
 233     wxGBPosition GetItemPosition(wxSizer *sizer);
 234     wxGBPosition GetItemPosition(size_t index);
 235
 236     // Set the grid position of the specified item.  Returns true on success.
 237     // If the move is not allowed (because an item is already there) then
 238     // false is returned.   (non-recursive)
 239     bool SetItemPosition(wxWindow *window, const wxGBPosition& pos);
 240     bool SetItemPosition(wxSizer *sizer, const wxGBPosition& pos);
 241     bool SetItemPosition(size_t index, const wxGBPosition& pos);
 242
 243     // Get the row/col spanning of the specified item (non-recursive)
 244     wxGBSpan GetItemSpan(wxWindow *window);
 245     wxGBSpan GetItemSpan(wxSizer *sizer);
 246     wxGBSpan GetItemSpan(size_t index);
 247
 248     // Set the row/col spanning of the specified item. Returns true on
 249     // success.  If the move is not allowed (because an item is already there)
 250     // then false is returned. (non-recursive)
 251     bool SetItemSpan(wxWindow *window, const wxGBSpan& span);
 252     bool SetItemSpan(wxSizer *sizer, const wxGBSpan& span);
 253     bool SetItemSpan(size_t index, const wxGBSpan& span);
 254
 255
 256     // Find the sizer item for the given window or subsizer, returns NULL if
 257     // not found. (non-recursive)
 258     wxGBSizerItem* FindItem(wxWindow* window);
 259     wxGBSizerItem* FindItem(wxSizer* sizer);
 260
 261
 262     // Return the sizer item for the given grid cell, or NULL if there is no
 263     // item at that position. (non-recursive)
 264     wxGBSizerItem* FindItemAtPosition(const wxGBPosition& pos);
 265
 266
 267     // Return the sizer item located at the point given in pt, or NULL if
 268     // there is no item at that point. The (x,y) coordinates in pt correspond
 269     // to the client coordinates of the window using the sizer for
 270     // layout. (non-recursive)
 271     wxGBSizerItem* FindItemAtPoint(const wxPoint& pt);
 272
 273
 274     // Return the sizer item that has a matching user data (it only compares
 275     // pointer values) or NULL if not found. (non-recursive)
 276     wxGBSizerItem* FindItemWithData(const wxObject* userData);
 277
 278
 279     // These are what make the sizer do size calculations and layout
 280     virtual void RecalcSizes();
 281     virtual wxSize CalcMin();
 282
 283
 284     // Look at all items and see if any intersect (or would overlap) the given
 285     // item.  Returns true if so, false if there would be no overlap.  If an
 286     // excludeItem is given then it will not be checked for intersection, for
 287     // example it may be the item we are checking the position of.
 288     bool CheckForIntersection(wxGBSizerItem* item, wxGBSizerItem* excludeItem = NULL);
 289     bool CheckForIntersection(const wxGBPosition& pos, const wxGBSpan& span, wxGBSizerItem* excludeItem = NULL);
 290
 291
 292     // The Add base class virtuals should not be used with this class, but
 293     // we'll try to make them automatically select a location for the item
 294     // anyway.
 295     virtual wxSizerItem* Add( wxWindow *window, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 296     virtual wxSizerItem* Add( wxSizer *sizer, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 297     virtual wxSizerItem* Add( int width, int height, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 298
 299     // The Insert and Prepend base class virtuals that are not appropriate for
 300     // this class and should not be used.  Their implementation in this class
 301     // simply fails.
 302     virtual wxSizerItem* Add( wxSizerItem *item );
 303     virtual wxSizerItem* Insert( size_t index, wxWindow *window, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 304     virtual wxSizerItem* Insert( size_t index, wxSizer *sizer, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 305     virtual wxSizerItem* Insert( size_t index, int width, int height, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 306     virtual wxSizerItem* Insert( size_t index, wxSizerItem *item );
 307     virtual wxSizerItem* Prepend( wxWindow *window, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 308     virtual wxSizerItem* Prepend( wxSizer *sizer, int proportion = 0, int flag = 0, int border = 0, wxObject* userData = NULL );
 309     virtual wxSizerItem* Prepend( int width,  int height,  int proportion = 0,  int flag = 0,  int border = 0,  wxObject* userData = NULL );
 310     virtual wxSizerItem* Prepend( wxSizerItem *item );
 311
 312
 313 protected:
 314     wxGBPosition FindEmptyCell();
 315     void AdjustForOverflow();
 316
 317     wxSize m_emptyCellSize;
 318
 319
 320 private:
 321
 322     DECLARE_CLASS(wxGridBagSizer)
 323     wxDECLARE_NO_COPY_CLASS(wxGridBagSizer);
 324 };
 325
 326 //---------------------------------------------------------------------------
 327 #endif