Implement wxGridBlockCoords class

wxGridBlockCoords represents a location of a block of cells in the grid.
2020-02-28 02:38:03 +07:00
parent 673ed29d7b
commit acd72efbf1
4 changed files with 722 additions and 2 deletions
--- a/include/wx/generic/grid.h
+++ b/include/wx/generic/grid.h
@@ -747,10 +747,133 @@ private:
 };


+// ----------------------------------------------------------------------------
+// wxGridBlockCoords: location of a block of cells in the grid
+// ----------------------------------------------------------------------------
+
+struct wxGridBlockDiffResult;
+
+class WXDLLIMPEXP_CORE wxGridBlockCoords
+{
+public:
+    wxGridBlockCoords() :
+        m_topRow(-1),
+        m_leftCol(-1),
+        m_bottomRow(-1),
+        m_rightCol(-1)
+    {
+    }
+
+    wxGridBlockCoords(int topRow, int leftCol, int bottomRow, int rightCol) :
+        m_topRow(topRow),
+        m_leftCol(leftCol),
+        m_bottomRow(bottomRow),
+        m_rightCol(rightCol)
+    {
+    }
+
+    // default copy ctor is ok
+
+    int GetTopRow() const { return m_topRow; }
+    void SetTopRow(int row) { m_topRow = row; }
+    int GetLeftCol() const { return m_leftCol; }
+    void SetLeftCol(int col) { m_leftCol = col; }
+    int GetBottomRow() const { return m_bottomRow; }
+    void SetBottomRow(int row) { m_bottomRow = row; }
+    int GetRightCol() const { return m_rightCol; }
+    void SetRightCol(int col) { m_rightCol = col; }
+
+    wxGridCellCoords GetTopLeft() const
+    {
+        return wxGridCellCoords(m_topRow, m_leftCol);
+    }
+
+    wxGridCellCoords GetBottomRight() const
+    {
+        return wxGridCellCoords(m_bottomRow, m_rightCol);
+    }
+
+    wxGridBlockCoords Canonicalize() const
+    {
+        wxGridBlockCoords result = *this;
+
+        if ( result.m_topRow > result.m_bottomRow )
+            wxSwap(result.m_topRow, result.m_bottomRow);
+
+        if ( result.m_leftCol > result.m_rightCol )
+            wxSwap(result.m_leftCol, result.m_rightCol);
+
+        return result;
+    }
+
+    bool Intersects(const wxGridBlockCoords& other) const
+    {
+        return m_topRow <= other.m_bottomRow && m_bottomRow >= other.m_topRow &&
+               m_leftCol <= other.m_rightCol && m_rightCol >= other.m_leftCol;
+    }
+
+    // Whether the block contains the cell.
+    // returns @true, if the block contains the cell,
+    //         @false, otherwise
+    bool ContainCell(const wxGridCellCoords& cell) const;
+
+    // Whether the blocks contain each other.
+    // returns 1, if this block contains the other,
+    //        -1, if the other block contains this one,
+    //         0, otherwise
+    int ContainBlock(const wxGridBlockCoords& other) const;
+
+    // Calculates the result blocks by subtracting the other block from this
+    // block. splitOrientation can be wxVERTICAL or wxHORIZONTAL.
+    wxGridBlockDiffResult
+    Difference(const wxGridBlockCoords& other, int splitOrientation) const;
+
+    // Calculates the symmetric difference of the blocks.
+    wxGridBlockDiffResult
+    SymDifference(const wxGridBlockCoords& other) const;
+
+    bool operator==(const wxGridBlockCoords& other) const
+    {
+        return m_topRow == other.m_topRow && m_leftCol == other.m_leftCol &&
+               m_bottomRow == other.m_bottomRow && m_rightCol == other.m_rightCol;
+    }
+
+    bool operator!=(const wxGridBlockCoords& other) const
+    {
+        return !(*this == other);
+    }
+
+    bool operator!() const
+    {
+        return m_topRow == -1 && m_leftCol == -1 &&
+               m_bottomRow == -1 && m_rightCol == -1;
+    }
+
+private:
+    int m_topRow;
+    int m_leftCol;
+    int m_bottomRow;
+    int m_rightCol;
+};
+
+// ----------------------------------------------------------------------------
+// wxGridBlockDiffResult: The helper struct uses as a result type for difference
+// functions of wxGridBlockCoords class.
+// Parts can be uninitialized (equals to wxGridNoBlockCoords), that means
+// that the corresponding part doesn't exists in the result.
+// ----------------------------------------------------------------------------
+
+struct wxGridBlockDiffResult
+{
+    wxGridBlockCoords m_parts[4];
+};
+
+
 // For comparisons...
 //
-extern WXDLLIMPEXP_CORE wxGridCellCoords wxGridNoCellCoords;
-extern WXDLLIMPEXP_CORE wxRect           wxGridNoCellRect;
+extern WXDLLIMPEXP_CORE wxGridCellCoords  wxGridNoCellCoords;
+extern WXDLLIMPEXP_CORE wxGridBlockCoords wxGridNoBlockCoords;
+extern WXDLLIMPEXP_CORE wxRect            wxGridNoCellRect;

 // An array of cell coords...
 //