multicell.cpp

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

/////////////////////////////////////////////////////////////////////////////
// Name:        multicell.cpp
// Purpose:     provide two new classes for layout, wxMultiCellSizer and wxMultiCellCanvas
// Author:      Jonathan Bayer
// Modified by:
// Created:
// RCS-ID:      $Id: multicell.cpp,v 1.17 2006/10/16 09:29:31 ABX Exp $
// Copyright:   (c) Jonathan Bayer
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// This was inspired by the gbsizer class written by Alex Andruschak

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#ifndef WX_PRECOMP
    #include "wx/wx.h"
#endif

#include "wx/gizmos/multicell.h"




//---------------------------------------------------------------------------

IMPLEMENT_ABSTRACT_CLASS(wxMultiCellSizer, wxSizer);
IMPLEMENT_ABSTRACT_CLASS(wxMultiCellItemHandle, wxObject);

//---------------------------------------------------------------------------
// wxMultiCellItemHandle
//---------------------------------------------------------------------------
/*
 *Function Name: wxMultiCellItemHandle :: wxMultiCellItemHandle
 *
 *Parameters:    int         row
 *               int         column
 *               int         height
 *               int         width
 *               wxSize      size
 *               wxResizable Style
 *               wxSize      weight
 *               int         align
 *
 *Description:   This is the constructor for the class.
 *
 */

void wxMultiCellItemHandle :: Initialize( int row, int column, int height, int width, wxSize size, wxResizable Style, wxSize weight, int align)
{
    m_column = column;
    m_row = row;
    m_width = width;
    m_height = height;

    m_style = Style;
    m_fixedSize = size;
    m_alignment = align;
    m_weight = weight;
}
//---------------------------------------------------------------------------
wxMultiCellItemHandle :: wxMultiCellItemHandle( int row, int column, int height, int width, wxSize size, wxResizable Style, wxSize weight, int align)
{
    Initialize(row, column,height, width, size, Style, weight, align);
}
//---------------------------------------------------------------------------
wxMultiCellItemHandle :: wxMultiCellItemHandle( int row, int column, wxSize size, wxResizable style, wxSize weight, int align)
{
    Initialize(row, column,1, 1, size, style, weight, align);
}
//---------------------------------------------------------------------------
wxMultiCellItemHandle :: wxMultiCellItemHandle( int row, int column, wxResizable style, wxSize weight, int align)
{
    Initialize(row, column, 1, 1, wxSize(1, 1), style, weight, align);
}
//---------------------------------------------------------------------------
int wxMultiCellItemHandle::GetColumn()
{
    return m_column;
}
//---------------------------------------------------------------------------
int wxMultiCellItemHandle::GetRow()
{
    return m_row;
}
//---------------------------------------------------------------------------
int wxMultiCellItemHandle::GetWidth()
{
    return m_width;
}
//---------------------------------------------------------------------------
int wxMultiCellItemHandle::GetHeight()
{
    return m_height;
}
//---------------------------------------------------------------------------
wxResizable    wxMultiCellItemHandle :: GetStyle()
{
    return m_style;
};
//---------------------------------------------------------------------------
wxSize wxMultiCellItemHandle :: GetLocalSize()
{
    return m_fixedSize;
};
//---------------------------------------------------------------------------
int wxMultiCellItemHandle :: GetAlignment()
{
    return m_alignment;
};
//---------------------------------------------------------------------------
wxSize wxMultiCellItemHandle :: GetWeight()
{
    return m_weight;
};



//---------------------------------------------------------------------------

//---------------------------------------------------------------------------
// wxMultiCellSizer
//---------------------------------------------------------------------------

/*
 *Function Name: wxMultiCellSizer::Initialize
 *
 *Parameters:    wxsize Initial size of sizer
 *
 *Description:   This is a common function to initialize all the members of
 *               this class.  It is only called from the constructors
 *
 */

void wxMultiCellSizer::Initialize( wxSize size )
{
    m_cell_count = size;
    m_maxHeight = (int *)malloc((1 + m_cell_count.GetHeight()) * sizeof(int));
    m_maxWidth = (int *)malloc( (1 + m_cell_count.GetWidth()) * sizeof(int));
    m_rowStretch = (int *)malloc( (1 + m_cell_count.GetHeight()) * sizeof(int));
    m_colStretch = (int *)malloc((1 + m_cell_count.GetWidth()) * sizeof(int));

    m_weights = (wxSize **)malloc((1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
    m_minSizes = (wxSize **)malloc((1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
    for (int x = 0; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
    {
        m_weights[x] = new wxSize(0,0);
        m_minSizes[x] = new wxSize(0,0);
    }

    m_maxWeights = 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth());
    m_defaultCellSize = wxSize(5, 5);
    m_win = NULL;
    m_pen = wxRED_PEN;
}
//---------------------------------------------------------------------------
wxMultiCellSizer::wxMultiCellSizer( wxSize & size )
{
    Initialize(size);
}
//---------------------------------------------------------------------------
wxMultiCellSizer::wxMultiCellSizer( int rows, int cols)
{
    wxSize size(cols, rows);
    Initialize(size);
}
//---------------------------------------------------------------------------
wxMultiCellSizer::~wxMultiCellSizer()
{
    WX_CLEAR_LIST(wxSizerItemList, m_children);

    free(m_maxHeight);
    free(m_maxWidth);
    free(m_rowStretch);
    free(m_colStretch);

    for (int x = 0; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
    {
        delete m_weights[x];
        delete m_minSizes[x];
    }
    free(m_weights);
    free(m_minSizes);
}
//---------------------------------------------------------------------------
bool wxMultiCellSizer::EnableGridLines(wxWindow *win)
{
    m_win = win;
    return true;
}
//---------------------------------------------------------------------------
bool wxMultiCellSizer::SetGridPen(const wxPen *pen)
{
    m_pen = pen;
    return true;
}

//---------------------------------------------------------------------------
bool wxMultiCellSizer::SetDefaultCellSize(wxSize size)
{
    m_defaultCellSize = size;
    return true;
}
//---------------------------------------------------------------------------
bool wxMultiCellSizer::SetColumnWidth(int column, int colSize, bool expandable)
{
    if (expandable)
    {
        m_minSizes[column]->SetWidth(-colSize);
    }
    else
    {
        m_minSizes[column]->SetWidth(colSize);
    }
    return true;
}
//---------------------------------------------------------------------------
bool wxMultiCellSizer::SetRowHeight(int row, int rowSize, bool expandable)
{
    if (expandable)
    {
        m_minSizes[row]->SetHeight(-rowSize);
    }
    else
    {
        m_minSizes[row]->SetHeight(rowSize);
    }
    return true;
}
//---------------------------------------------------------------------------
void wxMultiCellSizer::RecalcSizes()
{
    if (m_children.GetCount() == 0)
        return;
    wxSize size = GetSize();
    wxPoint pos = GetPosition();

    GetMinimums();

    // We need to take the unused space and equally give it out to all the rows/columns
    // which are stretchable

    int unUsedWidth = size.GetWidth() - Sum(m_maxWidth, m_cell_count.GetWidth());
    int unUsedHeight = size.GetHeight() - Sum(m_maxHeight, m_cell_count.GetHeight());
    int totalWidthWeight = 0;
    int totalHeightWeight = 0;
    int x;

    for (x = 0; x < wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
    {
        if (m_rowStretch[x])
        {
            totalHeightWeight += m_weights[x]->GetHeight();
        }
        if (x < m_cell_count.GetWidth() && m_colStretch[x])
        {
            totalWidthWeight += m_weights[x]->GetWidth();
        }
    }
    for (x = 0; x < wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
    {
        if (x < m_cell_count.GetHeight() && m_rowStretch[x])
        {
            m_maxHeight[x] += unUsedHeight * m_weights[x]->GetHeight() / totalHeightWeight;
        }
        if (x < m_cell_count.GetWidth() && m_colStretch[x])
        {
            m_maxWidth[x] += unUsedWidth * m_weights[x]->GetWidth() / totalWidthWeight;
        }
    }
    // We now have everything we need to figure each cell position and size
    // The arrays m_maxHeight and m_maxWidth now contain the final widths and height of
    // each row and column.

    double cell_width = (double)size.GetWidth() / (double)m_cell_count.GetWidth();
    double cell_height = (double)size.GetHeight() / (double)m_cell_count.GetHeight();
    wxPoint c_point;
    wxSize  c_size;

    wxSizerItemList::compatibility_iterator current = m_children.GetFirst();
    while (current)
    {
        wxSizerItem *item = current->GetData();

        wxMultiCellItemHandle *rect;
        if (item != NULL &&
            (rect = (wxMultiCellItemHandle *)item->GetUserData()) != NULL)
        {
            c_point.x = pos.x + (int)(rect->GetColumn() * cell_width);
            c_point.y = pos.y + (int)(rect->GetRow() * cell_height);

            c_point.x = pos.x + Sum(m_maxWidth, rect->GetColumn());
            c_point.y = pos.y + Sum(m_maxHeight, rect->GetRow());


            c_size = rect->GetLocalSize();
            wxSize minSize( item->CalcMin() );
            if (c_size.GetHeight() != wxDefaultCoord ||
                c_size.GetWidth() != wxDefaultCoord)
            {
                minSize.SetHeight(wxMax(minSize.GetHeight(), c_size.GetHeight()));
                minSize.SetWidth(wxMax(minSize.GetWidth(), c_size.GetWidth()));
            }
            if (rect->GetStyle() & wxHORIZONTAL_RESIZABLE ||
                rect->GetWidth() > 1
                || m_minSizes[rect->GetColumn()]->GetWidth() < 0)
            {
                int w = 0;
                for (int x = 0; x < rect->GetWidth(); x++)
                {
                    w += m_maxWidth[rect->GetColumn() + x];
                }
                c_size.SetWidth(w);
            }
            else
            {
                c_size.SetWidth(minSize.GetWidth() );
            }