src/generic/splitter.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        splitter.cpp
// Purpose:     wxSplitterWindow implementation
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
    #pragma implementation "splitter.h"
#endif

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

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

#include <stdlib.h>

#include "wx/string.h"
#include "wx/splitter.h"
#include "wx/dcscreen.h"

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxCommandEvent)

BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
    EVT_PAINT(wxSplitterWindow::OnPaint)
    EVT_SIZE(wxSplitterWindow::OnSize)
    EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)

    EVT_SPLITTER_SASH_POS_CHANGED(-1, wxSplitterWindow::OnSashPosChanged)
    EVT_SPLITTER_DCLICK(-1,           wxSplitterWindow::OnDoubleClick)
    EVT_SPLITTER_UNSPLIT(-1,          wxSplitterWindow::OnUnsplitEvent)
END_EVENT_TABLE()
#endif

wxSplitterWindow::wxSplitterWindow()
{
    m_splitMode = wxSPLIT_VERTICAL;
    m_windowOne = (wxWindow *) NULL;
    m_windowTwo = (wxWindow *) NULL;
    m_dragMode = wxSPLIT_DRAG_NONE;
    m_oldX = 0;
    m_oldY = 0;
    m_firstX = 0;
    m_firstY = 0;
    m_sashSize = 7;
    m_borderSize = 2;
    m_sashPosition = 0;
    m_sashCursorWE = (wxCursor *) NULL;
    m_sashCursorNS = (wxCursor *) NULL;
    m_sashTrackerPen = (wxPen *) NULL;
    m_lightShadowPen = (wxPen *) NULL;
    m_mediumShadowPen = (wxPen *) NULL;
    m_darkShadowPen = (wxPen *) NULL;
    m_faceBrush = (wxBrush *) NULL;
    m_facePen = (wxPen *) NULL;
    m_hilightPen = (wxPen *) NULL;
    m_minimumPaneSize = 0;
}

wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
                                   const wxPoint& pos,
                                   const wxSize& size,
                                   long style,
                                   const wxString& name)
                : wxWindow(parent, id, pos, size, style, name)
{
    m_splitMode = wxSPLIT_VERTICAL;
    m_windowOne = (wxWindow *) NULL;
    m_windowTwo = (wxWindow *) NULL;
    m_dragMode = wxSPLIT_DRAG_NONE;
    m_oldX = 0;
    m_oldY = 0;
    m_firstX = 0;
    m_firstY = 0;
    m_sashSize = 7;
    m_borderSize = 2;
    m_sashPosition = 0;
    m_minimumPaneSize = 0;
    m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
    m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
    m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
    m_lightShadowPen = (wxPen *) NULL;
    m_mediumShadowPen = (wxPen *) NULL;
    m_darkShadowPen = (wxPen *) NULL;
    m_faceBrush = (wxBrush *) NULL;
    m_facePen = (wxPen *) NULL;
    m_hilightPen = (wxPen *) NULL;

    if ( style & wxSP_3D )
    {
        m_borderSize = 2;
        m_sashSize = 7;
    }
    else if ( style & wxSP_BORDER )
    {
        m_borderSize = 1;
        m_sashSize = 3;
    }
    else
    {
        m_borderSize = 0;
        m_sashSize = 3;
    }

    // Eventually, we'll respond to colour change messages
    InitColours();

    // For debugging purposes, to see the background.
//    SetBackground(wxBLUE_BRUSH);
}

wxSplitterWindow::~wxSplitterWindow()
{
    delete m_sashCursorWE;
    delete m_sashCursorNS;
    delete m_sashTrackerPen;
    delete m_lightShadowPen;
    delete m_darkShadowPen;
    delete m_mediumShadowPen;
    delete m_hilightPen;
    delete m_facePen;
    delete m_faceBrush;
}

void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
{
    wxPaintDC dc(this);

    if ( m_borderSize > 0 )
        DrawBorders(dc);
    DrawSash(dc);
}


void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
{
    long x = event.GetX();
    long y = event.GetY();

    // reset the cursor
#ifdef __WXMOTIF__
    SetCursor(* wxSTANDARD_CURSOR);
#endif
#ifdef __WXMSW__
    SetCursor(wxCursor());
#endif

    // under wxGTK the method above causes the mouse
    // to flicker so we set the standard cursor only
    // when leaving the window and when moving over
    // non-sash parts of the window. this should work
    // on the other platforms as well, but who knows.
#ifdef __WXGTK__
    if (event.Leaving())
        SetCursor(* wxSTANDARD_CURSOR);
#endif

    if (event.LeftDown())
    {
        if ( SashHitTest(x, y) )
        {
            CaptureMouse();

            m_dragMode = wxSPLIT_DRAG_DRAGGING;

            DrawSashTracker(x, y);
            m_oldX = x;
            m_oldY = y;
            return;
        }
    }
    else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
    {
        // We can stop dragging now and see what we've got.
        m_dragMode = wxSPLIT_DRAG_NONE;
        ReleaseMouse();

        // Erase old tracker
        DrawSashTracker(m_oldX, m_oldY);

        // Obtain window size. We are only interested in the dimension the sash
        // splits up
        int w, h;
        GetClientSize(&w, &h);
        int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
        int new_sash_position =
            (int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );

        wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
                                      this);
        eventSplitter.m_data.pos = new_sash_position;
        if ( GetEventHandler()->ProcessEvent(eventSplitter) )
        {
            new_sash_position = eventSplitter.GetSashPosition();
            if ( new_sash_position == -1 )
            {
                // change not allowed
                return;
            }
        }

        if ( new_sash_position == 0 )
        {
            // We remove the first window from the view
            wxWindow *removedWindow = m_windowOne;
            m_windowOne = m_windowTwo;
            m_windowTwo = (wxWindow *) NULL;
            SendUnsplitEvent(removedWindow);
            m_sashPosition = 0;
        }
        else if ( new_sash_position == window_size )
        {
            // We remove the second window from the view
            wxWindow *removedWindow = m_windowTwo;
            m_windowTwo = (wxWindow *) NULL;
            SendUnsplitEvent(removedWindow);
            m_sashPosition = 0;
        }
        else
        {
            m_sashPosition = new_sash_position;
        }

        SizeWindows();
    }  // left up && dragging
    else if (event.Moving() && !event.Dragging())
    {
        // Just change the cursor if required
        if ( SashHitTest(x, y) )
        {
                if ( m_splitMode == wxSPLIT_VERTICAL )
                {
                    SetCursor(*m_sashCursorWE);
                }
                else
                {
                    SetCursor(*m_sashCursorNS);
                }
        }
#ifdef __WXGTK__
        else
        {
            // where else do we unset the cursor?
            SetCursor(* wxSTANDARD_CURSOR);
        }
#endif // __WXGTK__
    }
    else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
    {
        // Erase old tracker
        DrawSashTracker(m_oldX, m_oldY);

#ifdef __WXMSW__
        // As we captured the mouse, we may get the mouse events from outside
        // our window - for example, negative values in x, y. This has a weird
        // consequence under MSW where we use unsigned values sometimes and
        // signed ones other times: the coordinates turn as big positive
        // numbers and so the sash is drawn on the *right* side of the window
        // instead of the left (or bottom instead of top). Correct this.
        m_oldX = x;
        m_oldY = y;

        if ( (short)m_oldX < 0 )
            m_oldX = 0;
        if ( (short)m_oldY < 0 )
            m_oldY = 0;
#endif // __WXMSW__

        // Draw new one
        DrawSashTracker(m_oldX, m_oldY);
    }
    else if ( event.LeftDClick() )
    {
        wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
                                      this);
        eventSplitter.m_data.pt.x = x;
        eventSplitter.m_data.pt.y = y;

        (void)GetEventHandler()->ProcessEvent(eventSplitter);
    }
}

void wxSplitterWindow::OnSize(wxSizeEvent& WXUNUSED(event))
{
    int cw, ch;
    GetClientSize( &cw, &ch );
    if ( m_windowTwo )
    {
        if ( m_splitMode == wxSPLIT_VERTICAL )
        {
            if ( m_sashPosition >= (cw - 5) )
                m_sashPosition = wxMax(10, cw - 40);
        }
        if ( m_splitMode == wxSPLIT_HORIZONTAL )
        {
            if ( m_sashPosition >= (ch - 5) )
                m_sashPosition = wxMax(10, ch - 40);
        }
    }
    SizeWindows();
}

bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
{
    if ( m_windowTwo == NULL || m_sashPosition == 0)
        return FALSE; // No sash

    if ( m_splitMode == wxSPLIT_VERTICAL )
    {
        if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
            return TRUE;
        else
            return FALSE;
    }
    else
    {
        if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
            return TRUE;
        else
            return FALSE;
    }

    return FALSE;
}

// Draw 3D effect borders
void wxSplitterWindow::DrawBorders(wxDC& dc)
{
    int w, h;
    GetClientSize(&w, &h);

    if ( GetWindowStyleFlag() & wxSP_3D )
    {
        dc.SetPen(*m_mediumShadowPen);
        dc.DrawLine(0, 0, w-1, 0);
        dc.DrawLine(0, 0, 0, h - 1);

        dc.SetPen(*m_darkShadowPen);
        dc.DrawLine(1, 1, w-2, 1);
        dc.DrawLine(1, 1, 1, h-2);

        dc.SetPen(*m_hilightPen);
        dc.DrawLine(0, h-1, w-1, h-1);
        dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
                                     /// Anyway, h is required for MSW.

        dc.SetPen(*m_lightShadowPen);
        dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
        dc.DrawLine(1, h-2, w-1, h-2);     // Bottom
    }
    else if ( GetWindowStyleFlag() & wxSP_BORDER )
    {
        dc.SetBrush(*wxTRANSPARENT_BRUSH);
        dc.SetPen(*wxBLACK_PEN);
        dc.DrawRectangle(0, 0, w-1, h-1);
    }

    dc.SetPen(wxNullPen);
    dc.SetBrush(wxNullBrush);
}

// Draw the sash
void wxSplitterWindow::DrawSash(wxDC& dc)
{
    if ( m_sashPosition == 0 || !m_windowTwo)
        return;

    int w, h;
    GetClientSize(&w, &h);

    if ( GetWindowStyleFlag() & wxSP_3D )
    {
        if ( m_splitMode == wxSPLIT_VERTICAL )
        {
            dc.SetPen(*m_facePen);
            dc.SetBrush(*m_faceBrush);
            dc.DrawRectangle(m_sashPosition + 2, 0, m_sashSize - 4, h);

            dc.SetBrush(*wxTRANSPARENT_BRUSH);

            dc.SetPen(*m_lightShadowPen);
            dc.DrawLine(m_sashPosition, 1, m_sashPosition, h-2);

            dc.SetPen(*m_hilightPen);
            dc.DrawLine(m_sashPosition+1, 0, m_sashPosition+1, h);

            dc.SetPen(*m_mediumShadowPen);
            dc.DrawLine(m_sashPosition+m_sashSize-2, 1, m_sashPosition+m_sashSize-2, h-1);

            dc.SetPen(*m_darkShadowPen);
            dc.DrawLine(m_sashPosition+m_sashSize-1, 2, m_sashPosition+m_sashSize-1, h-2);
        }
        else
        {
            dc.SetPen(*m_facePen);
            dc.SetBrush(*m_faceBrush);
            dc.DrawRectangle(0, m_sashPosition + 2, w, m_sashSize - 4);

            dc.SetBrush(*wxTRANSPARENT_BRUSH);

            dc.SetPen(*m_lightShadowPen);
            dc.DrawLine(1, m_sashPosition, w-2, m_sashPosition);

            dc.SetPen(*m_hilightPen);
            dc.DrawLine(0, m_sashPosition+1, w, m_sashPosition+1);

            dc.SetPen(*m_mediumShadowPen);
            dc.DrawLine(1, m_sashPosition+m_sashSize-2, w-1, m_sashPosition+m_sashSize-2);

            dc.SetPen(*m_darkShadowPen);
            dc.DrawLine(2, m_sashPosition+m_sashSize-1, w-2, m_sashPosition+m_sashSize-1);
        }
    }
    else
    {
        if ( m_splitMode == wxSPLIT_VERTICAL )
        {
            dc.SetPen(*wxBLACK_PEN);
            dc.SetBrush(*wxBLACK_BRUSH);
            int h1 = h-1;
            if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
                h1 += 1; // Not sure why this is necessary...
            dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
        }
        else
        {
            dc.SetPen(*wxBLACK_PEN);
            dc.SetBrush(*wxBLACK_BRUSH);
            int w1 = w-1;
            if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
                w1 ++;

            dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
        }

    }

    dc.SetPen(wxNullPen);
    dc.SetBrush(wxNullBrush);
}

// Draw the sash tracker (for whilst moving the sash)
void wxSplitterWindow::DrawSashTracker(int x, int y)
{
    int w, h;
    GetClientSize(&w, &h);

    wxScreenDC screenDC;
    int x1, y1;
    int x2, y2;

    if ( m_splitMode == wxSPLIT_VERTICAL )
    {
        x1 = x; y1 = 2;
        x2 = x; y2 = h-2;

        if ( x1 > w )
        {
            x1 = w; x2 = w;
        }
        else if ( x1 < 0 )
        {
            x1 = 0; x2 = 0;
        }
    }
    else
    {
        x1 = 2; y1 = y;
        x2 = w-2; y2 = y;

        if ( y1 > h )
        {
            y1 = h;
            y2 = h;
        }
        else if ( y1 < 0 )
        {
            y1 = 0;
            y2 = 0;
        }
    }

    ClientToScreen(&x1, &y1);
    ClientToScreen(&x2, &y2);

    screenDC.SetLogicalFunction(wxXOR);
    screenDC.SetPen(*m_sashTrackerPen);
    screenDC.SetBrush(*wxTRANSPARENT_BRUSH);

    screenDC.DrawLine(x1, y1, x2, y2);

    screenDC.SetLogicalFunction(wxCOPY);

    screenDC.SetPen(wxNullPen);
    screenDC.SetBrush(wxNullBrush);
}

// Position and size subwindows.
// Note that the border size applies to each subwindow, not
// including the edges next to the sash.
void wxSplitterWindow::SizeWindows()
{
    int w, h;
    GetClientSize(&w, &h);

    if ( m_windowOne && !m_windowTwo )
    {
        m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2*m_borderSize, h - 2*m_borderSize);

	if (m_windowOne->GetAutoLayout())
	    m_windowOne->Layout();
    }
    else if ( m_windowOne && m_windowTwo )
    {
        if (m_splitMode == wxSPLIT_VERTICAL)
        {
            int x1 = m_borderSize;
            int y1 = m_borderSize;
            int w1 = m_sashPosition - m_borderSize;
            int h1 = h - 2*m_borderSize;

            int x2 = m_sashPosition + m_sashSize;
            int y2 = m_borderSize;
            int w2 = w - 2*m_borderSize - m_sashSize - w1;
            int h2 = h - 2*m_borderSize;

            m_windowOne->SetSize(x1, y1, w1, h1);
            m_windowTwo->SetSize(x2, y2, w2, h2);

	    if (m_windowOne->GetAutoLayout())
	        m_windowOne->Layout();
	    if (m_windowTwo->GetAutoLayout())
	        m_windowTwo->Layout();
        }
        else
        {
            m_windowOne->SetSize(m_borderSize, m_borderSize,
                w - 2*m_borderSize, m_sashPosition - m_borderSize);
            m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
                w - 2*m_borderSize, h - 2*m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));

	    if (m_windowOne->GetAutoLayout())
	        m_windowOne->Layout();
	    if (m_windowTwo->GetAutoLayout())
	        m_windowTwo->Layout();
        }
    }
    wxClientDC dc(this);
    DrawBorders(dc);
    DrawSash(dc);
}

// Set pane for unsplit window
void wxSplitterWindow::Initialize(wxWindow *window)
{
    m_windowOne = window;
    m_windowTwo = (wxWindow *) NULL;
    m_sashPosition = 0;
}

// Associates the given window with window 2, drawing the appropriate sash
// and changing the split mode.
// Does nothing and returns FALSE if the window is already split.
bool wxSplitterWindow::SplitVertically(wxWindow *window1, wxWindow *window2, int sashPosition)
{
    if ( IsSplit() )
        return FALSE;

    int w, h;
    GetClientSize(&w, &h);

    m_splitMode = wxSPLIT_VERTICAL;
    m_windowOne = window1;
    m_windowTwo = window2;
    if ( sashPosition > 0 )
        m_sashPosition = sashPosition;
    else if ( sashPosition < 0 )
        m_sashPosition = w - sashPosition;
    else    // default
        m_sashPosition = w/2;

    SizeWindows();

    return TRUE;
}

bool wxSplitterWindow::SplitHorizontally(wxWindow *window1, wxWindow *window2, int sashPosition)
{
    if ( IsSplit() )
        return FALSE;

    int w, h;
    GetClientSize(&w, &h);

    m_splitMode = wxSPLIT_HORIZONTAL;
    m_windowOne = window1;
    m_windowTwo = window2;
    if ( sashPosition > 0 )
        m_sashPosition = sashPosition;
    else if ( sashPosition < 0 )
        m_sashPosition = h - sashPosition;
    else    // default
        m_sashPosition = h/2;

    SizeWindows();

    return TRUE;
}


// Remove the specified (or second) window from the view
// Doesn't actually delete the window.
bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
{
    if ( ! IsSplit() )
        return FALSE;

    wxWindow *win = NULL;
    if ( toRemove == NULL || toRemove == m_windowTwo)
    {
        win = m_windowTwo ;
        m_windowTwo = (wxWindow *) NULL;
    }
    else if ( toRemove == m_windowOne )
    {
        win = m_windowOne ;
        m_windowOne = m_windowTwo;
        m_windowTwo = (wxWindow *) NULL;
    }
    else
    {
        wxFAIL_MSG(_T("splitter: attempt to remove a non-existent window"));

        return FALSE;
    }

    SendUnsplitEvent(win);
    m_sashPosition = 0;
    SizeWindows();

    return TRUE;
}

// Replace a window with another one
bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
{
    wxCHECK_MSG( winOld, FALSE, _T("use one of Split() functions instead") );
    wxCHECK_MSG( winNew, FALSE, _T("use Unsplit() functions instead") );

    if ( winOld == m_windowTwo )
    {
        m_windowTwo = winNew;
    }
    else if ( winOld == m_windowOne )
    {
        m_windowOne = winNew;
    }
    else
    {
        wxFAIL_MSG(_T("splitter: attempt to replace a non-existent window"));

        return FALSE;
    }

    SizeWindows();

    return TRUE;
}

void wxSplitterWindow::SetSashPosition(int position, bool redraw)
{
    m_sashPosition = position;

    if ( redraw )
    {
        SizeWindows();
    }
}

// Initialize colours
void wxSplitterWindow::InitColours()
{
    wxDELETE( m_facePen );
    wxDELETE( m_faceBrush );
    wxDELETE( m_mediumShadowPen );
    wxDELETE( m_darkShadowPen );
    wxDELETE( m_lightShadowPen );
    wxDELETE( m_hilightPen );

    // Shadow colours
#if defined(__WIN95__)
    wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
    m_facePen = new wxPen(faceColour, 1, wxSOLID);
    m_faceBrush = new wxBrush(faceColour, wxSOLID);

    wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
    m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);

    wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
    m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);

    wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
    m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);

    wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
    m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
#else // !Win32
    m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
    m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
    m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
    m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
    m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
    m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
#endif // Win32/!Win32
}

void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
{
    wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
    event.m_data.win = winRemoved;

    (void)GetEventHandler()->ProcessEvent(event);
}

// ---------------------------------------------------------------------------
// splitter event handlers
// ---------------------------------------------------------------------------

void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
{
    // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
    const int UNSPLIT_THRESHOLD = 4;

    int newSashPosition = event.GetSashPosition();

    // Obtain relevant window dimension for bottom / right threshold check
    int w, h;
    GetClientSize(&w, &h);
    int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;

    if ( newSashPosition <= UNSPLIT_THRESHOLD )
    {
        // threshold top / left check
        newSashPosition = 0;
    }
    else if ( newSashPosition < m_minimumPaneSize )
    {
        // If resultant pane would be too small, enlarge it
        newSashPosition = m_minimumPaneSize;
    }

    if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
    {
        // threshold bottom/right check
        newSashPosition = window_size;
    }
    else if ( newSashPosition > window_size - m_minimumPaneSize )
    {
        // If resultant pane would be too small, enlarge it
        newSashPosition = window_size - m_minimumPaneSize;
    }

    // If the result is out of bounds it means minimum size is too big,
    // so split window in half as best compromise.
    if ( newSashPosition < 0 || newSashPosition > window_size )
        newSashPosition = window_size / 2;

    // for compatibility, call the virtual function
    if ( !OnSashPositionChange(newSashPosition) )
    {
        newSashPosition = -1;
    }

    event.SetSashPosition(newSashPosition);
}

// Called when the sash is double-clicked. The default behaviour is to remove
// the sash if the minimum pane size is zero.
void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
{
    // for compatibility, call the virtual function
    OnDoubleClickSash(event.GetX(), event.GetY());

    if ( GetMinimumPaneSize() == 0 )
    {
        Unsplit();
    }
}

void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
{
    wxWindow *win = event.GetWindowBeingRemoved();

    // for compatibility, call the virtual function
    OnUnsplit(win);

    win->Show(FALSE);
}
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: splitter.cpp
	3	// Purpose: wxSplitterWindow implementation
	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	#ifdef __GNUG__
	13	#pragma implementation "splitter.h"
	14	#endif
	15
	16	// For compilers that support precompilation, includes "wx.h".
	17	#include "wx/wxprec.h"
	18
	19	#ifdef __BORLANDC__
	20	#pragma hdrstop
	21	#endif
	22
	23	#ifndef WX_PRECOMP
	24	#include "wx/wx.h"
	25	#endif
	26
	27	#include <stdlib.h>
	28
	29	#include "wx/string.h"
	30	#include "wx/splitter.h"
	31	#include "wx/dcscreen.h"
	32
	33	#if !USE_SHARED_LIBRARY
	34	IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
	35	IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxCommandEvent)
	36
	37	BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
	38	EVT_PAINT(wxSplitterWindow::OnPaint)
	39	EVT_SIZE(wxSplitterWindow::OnSize)
	40	EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
	41
	42	EVT_SPLITTER_SASH_POS_CHANGED(-1, wxSplitterWindow::OnSashPosChanged)
	43	EVT_SPLITTER_DCLICK(-1, wxSplitterWindow::OnDoubleClick)
	44	EVT_SPLITTER_UNSPLIT(-1, wxSplitterWindow::OnUnsplitEvent)
	45	END_EVENT_TABLE()
	46	#endif
	47
	48	wxSplitterWindow::wxSplitterWindow()
	49	{
	50	m_splitMode = wxSPLIT_VERTICAL;
	51	m_windowOne = (wxWindow *) NULL;
	52	m_windowTwo = (wxWindow *) NULL;
	53	m_dragMode = wxSPLIT_DRAG_NONE;
	54	m_oldX = 0;
	55	m_oldY = 0;
	56	m_firstX = 0;
	57	m_firstY = 0;
	58	m_sashSize = 7;
	59	m_borderSize = 2;
	60	m_sashPosition = 0;
	61	m_sashCursorWE = (wxCursor *) NULL;
	62	m_sashCursorNS = (wxCursor *) NULL;
	63	m_sashTrackerPen = (wxPen *) NULL;
	64	m_lightShadowPen = (wxPen *) NULL;
	65	m_mediumShadowPen = (wxPen *) NULL;
	66	m_darkShadowPen = (wxPen *) NULL;
	67	m_faceBrush = (wxBrush *) NULL;
	68	m_facePen = (wxPen *) NULL;
	69	m_hilightPen = (wxPen *) NULL;
	70	m_minimumPaneSize = 0;
	71	}
	72
	73	wxSplitterWindow::wxSplitterWindow(wxWindow *parent, wxWindowID id,
	74	const wxPoint& pos,
	75	const wxSize& size,
	76	long style,
	77	const wxString& name)
	78	: wxWindow(parent, id, pos, size, style, name)
	79	{
	80	m_splitMode = wxSPLIT_VERTICAL;
	81	m_windowOne = (wxWindow *) NULL;
	82	m_windowTwo = (wxWindow *) NULL;
	83	m_dragMode = wxSPLIT_DRAG_NONE;
	84	m_oldX = 0;
	85	m_oldY = 0;
	86	m_firstX = 0;
	87	m_firstY = 0;
	88	m_sashSize = 7;
	89	m_borderSize = 2;
	90	m_sashPosition = 0;
	91	m_minimumPaneSize = 0;
	92	m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
	93	m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
	94	m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
	95	m_lightShadowPen = (wxPen *) NULL;
	96	m_mediumShadowPen = (wxPen *) NULL;
	97	m_darkShadowPen = (wxPen *) NULL;
	98	m_faceBrush = (wxBrush *) NULL;
	99	m_facePen = (wxPen *) NULL;
	100	m_hilightPen = (wxPen *) NULL;
	101
	102	if ( style & wxSP_3D )
	103	{
	104	m_borderSize = 2;
	105	m_sashSize = 7;
	106	}
	107	else if ( style & wxSP_BORDER )
	108	{
	109	m_borderSize = 1;
	110	m_sashSize = 3;
	111	}
	112	else
	113	{
	114	m_borderSize = 0;
	115	m_sashSize = 3;
	116	}
	117
	118	// Eventually, we'll respond to colour change messages
	119	InitColours();
	120
	121	// For debugging purposes, to see the background.
	122	// SetBackground(wxBLUE_BRUSH);
	123	}
	124
	125	wxSplitterWindow::~wxSplitterWindow()
	126	{
	127	delete m_sashCursorWE;
	128	delete m_sashCursorNS;
	129	delete m_sashTrackerPen;
	130	delete m_lightShadowPen;
	131	delete m_darkShadowPen;
	132	delete m_mediumShadowPen;
	133	delete m_hilightPen;
	134	delete m_facePen;
	135	delete m_faceBrush;
	136	}
	137
	138	void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
	139	{
	140	wxPaintDC dc(this);
	141
	142	if ( m_borderSize > 0 )
	143	DrawBorders(dc);
	144	DrawSash(dc);
	145	}
	146
	147
	148	void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
	149	{
	150	long x = event.GetX();
	151	long y = event.GetY();
	152
	153	// reset the cursor
	154	#ifdef __WXMOTIF__
	155	SetCursor(* wxSTANDARD_CURSOR);
	156	#endif
	157	#ifdef __WXMSW__
	158	SetCursor(wxCursor());
	159	#endif
	160
	161	// under wxGTK the method above causes the mouse
	162	// to flicker so we set the standard cursor only
	163	// when leaving the window and when moving over
	164	// non-sash parts of the window. this should work
	165	// on the other platforms as well, but who knows.
	166	#ifdef __WXGTK__
	167	if (event.Leaving())
	168	SetCursor(* wxSTANDARD_CURSOR);
	169	#endif
	170
	171	if (event.LeftDown())
	172	{
	173	if ( SashHitTest(x, y) )
	174	{
	175	CaptureMouse();
	176
	177	m_dragMode = wxSPLIT_DRAG_DRAGGING;
	178
	179	DrawSashTracker(x, y);
	180	m_oldX = x;
	181	m_oldY = y;
	182	return;
	183	}
	184	}
	185	else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
	186	{
	187	// We can stop dragging now and see what we've got.
	188	m_dragMode = wxSPLIT_DRAG_NONE;
	189	ReleaseMouse();
	190
	191	// Erase old tracker
	192	DrawSashTracker(m_oldX, m_oldY);
	193
	194	// Obtain window size. We are only interested in the dimension the sash
	195	// splits up
	196	int w, h;
	197	GetClientSize(&w, &h);
	198	int window_size = (m_splitMode == wxSPLIT_VERTICAL ? w : h );
	199	int new_sash_position =
	200	(int) ( m_splitMode == wxSPLIT_VERTICAL ? x : y );
	201
	202	wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED,
	203	this);
	204	eventSplitter.m_data.pos = new_sash_position;
	205	if ( GetEventHandler()->ProcessEvent(eventSplitter) )
	206	{
	207	new_sash_position = eventSplitter.GetSashPosition();
	208	if ( new_sash_position == -1 )
	209	{
	210	// change not allowed
	211	return;
	212	}
	213	}
	214
	215	if ( new_sash_position == 0 )
	216	{
	217	// We remove the first window from the view
	218	wxWindow *removedWindow = m_windowOne;
	219	m_windowOne = m_windowTwo;
	220	m_windowTwo = (wxWindow *) NULL;
	221	SendUnsplitEvent(removedWindow);
	222	m_sashPosition = 0;
	223	}
	224	else if ( new_sash_position == window_size )
	225	{
	226	// We remove the second window from the view
	227	wxWindow *removedWindow = m_windowTwo;
	228	m_windowTwo = (wxWindow *) NULL;
	229	SendUnsplitEvent(removedWindow);
	230	m_sashPosition = 0;
	231	}
	232	else
	233	{
	234	m_sashPosition = new_sash_position;
	235	}
	236
	237	SizeWindows();
	238	} // left up && dragging
	239	else if (event.Moving() && !event.Dragging())
	240	{
	241	// Just change the cursor if required
	242	if ( SashHitTest(x, y) )
	243	{
	244	if ( m_splitMode == wxSPLIT_VERTICAL )
	245	{
	246	SetCursor(*m_sashCursorWE);
	247	}
	248	else
	249	{
	250	SetCursor(*m_sashCursorNS);
	251	}
	252	}
	253	#ifdef __WXGTK__
	254	else
	255	{
	256	// where else do we unset the cursor?
	257	SetCursor(* wxSTANDARD_CURSOR);
	258	}
	259	#endif // __WXGTK__
	260	}
	261	else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
	262	{
	263	// Erase old tracker
	264	DrawSashTracker(m_oldX, m_oldY);
	265
	266	#ifdef __WXMSW__
	267	// As we captured the mouse, we may get the mouse events from outside
	268	// our window - for example, negative values in x, y. This has a weird
	269	// consequence under MSW where we use unsigned values sometimes and
	270	// signed ones other times: the coordinates turn as big positive
	271	// numbers and so the sash is drawn on the right side of the window
	272	// instead of the left (or bottom instead of top). Correct this.
	273	m_oldX = x;
	274	m_oldY = y;
	275
	276	if ( (short)m_oldX < 0 )
	277	m_oldX = 0;
	278	if ( (short)m_oldY < 0 )
	279	m_oldY = 0;
	280	#endif // __WXMSW__
	281
	282	// Draw new one
	283	DrawSashTracker(m_oldX, m_oldY);
	284	}
	285	else if ( event.LeftDClick() )
	286	{
	287	wxSplitterEvent eventSplitter(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED,
	288	this);
	289	eventSplitter.m_data.pt.x = x;
	290	eventSplitter.m_data.pt.y = y;
	291
	292	(void)GetEventHandler()->ProcessEvent(eventSplitter);
	293	}
	294	}
	295
	296	void wxSplitterWindow::OnSize(wxSizeEvent& WXUNUSED(event))
	297	{
	298	int cw, ch;
	299	GetClientSize( &cw, &ch );
	300	if ( m_windowTwo )
	301	{
	302	if ( m_splitMode == wxSPLIT_VERTICAL )
	303	{
	304	if ( m_sashPosition >= (cw - 5) )
	305	m_sashPosition = wxMax(10, cw - 40);
	306	}
	307	if ( m_splitMode == wxSPLIT_HORIZONTAL )
	308	{
	309	if ( m_sashPosition >= (ch - 5) )
	310	m_sashPosition = wxMax(10, ch - 40);
	311	}
	312	}
	313	SizeWindows();
	314	}
	315
	316	bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
	317	{
	318	if ( m_windowTwo == NULL \|\| m_sashPosition == 0)
	319	return FALSE; // No sash
	320
	321	if ( m_splitMode == wxSPLIT_VERTICAL )
	322	{
	323	if ( (x >= m_sashPosition - tolerance) && (x <= m_sashPosition + m_sashSize + tolerance) )
	324	return TRUE;
	325	else
	326	return FALSE;
	327	}
	328	else
	329	{
	330	if ( (y >= (m_sashPosition- tolerance)) && (y <= (m_sashPosition + m_sashSize + tolerance)) )
	331	return TRUE;
	332	else
	333	return FALSE;
	334	}
	335
	336	return FALSE;
	337	}
	338
	339	// Draw 3D effect borders
	340	void wxSplitterWindow::DrawBorders(wxDC& dc)
	341	{
	342	int w, h;
	343	GetClientSize(&w, &h);
	344
	345	if ( GetWindowStyleFlag() & wxSP_3D )
	346	{
	347	dc.SetPen(*m_mediumShadowPen);
	348	dc.DrawLine(0, 0, w-1, 0);
	349	dc.DrawLine(0, 0, 0, h - 1);
	350
	351	dc.SetPen(*m_darkShadowPen);
	352	dc.DrawLine(1, 1, w-2, 1);
	353	dc.DrawLine(1, 1, 1, h-2);
	354
	355	dc.SetPen(*m_hilightPen);
	356	dc.DrawLine(0, h-1, w-1, h-1);
	357	dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
	358	/// Anyway, h is required for MSW.
	359
	360	dc.SetPen(*m_lightShadowPen);
	361	dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
	362	dc.DrawLine(1, h-2, w-1, h-2); // Bottom
	363	}
	364	else if ( GetWindowStyleFlag() & wxSP_BORDER )
	365	{
	366	dc.SetBrush(*wxTRANSPARENT_BRUSH);
	367	dc.SetPen(*wxBLACK_PEN);
	368	dc.DrawRectangle(0, 0, w-1, h-1);
	369	}
	370
	371	dc.SetPen(wxNullPen);
	372	dc.SetBrush(wxNullBrush);
	373	}
	374
	375	// Draw the sash
	376	void wxSplitterWindow::DrawSash(wxDC& dc)
	377	{
	378	if ( m_sashPosition == 0 \|\| !m_windowTwo)
	379	return;
	380
	381	int w, h;
	382	GetClientSize(&w, &h);
	383
	384	if ( GetWindowStyleFlag() & wxSP_3D )
	385	{
	386	if ( m_splitMode == wxSPLIT_VERTICAL )
	387	{
	388	dc.SetPen(*m_facePen);
	389	dc.SetBrush(*m_faceBrush);
	390	dc.DrawRectangle(m_sashPosition + 2, 0, m_sashSize - 4, h);
	391
	392	dc.SetBrush(*wxTRANSPARENT_BRUSH);
	393
	394	dc.SetPen(*m_lightShadowPen);
	395	dc.DrawLine(m_sashPosition, 1, m_sashPosition, h-2);
	396
	397	dc.SetPen(*m_hilightPen);
	398	dc.DrawLine(m_sashPosition+1, 0, m_sashPosition+1, h);
	399
	400	dc.SetPen(*m_mediumShadowPen);
	401	dc.DrawLine(m_sashPosition+m_sashSize-2, 1, m_sashPosition+m_sashSize-2, h-1);
	402
	403	dc.SetPen(*m_darkShadowPen);
	404	dc.DrawLine(m_sashPosition+m_sashSize-1, 2, m_sashPosition+m_sashSize-1, h-2);
	405	}
	406	else
	407	{
	408	dc.SetPen(*m_facePen);
	409	dc.SetBrush(*m_faceBrush);
	410	dc.DrawRectangle(0, m_sashPosition + 2, w, m_sashSize - 4);
	411
	412	dc.SetBrush(*wxTRANSPARENT_BRUSH);
	413
	414	dc.SetPen(*m_lightShadowPen);
	415	dc.DrawLine(1, m_sashPosition, w-2, m_sashPosition);
	416
	417	dc.SetPen(*m_hilightPen);
	418	dc.DrawLine(0, m_sashPosition+1, w, m_sashPosition+1);
	419
	420	dc.SetPen(*m_mediumShadowPen);
	421	dc.DrawLine(1, m_sashPosition+m_sashSize-2, w-1, m_sashPosition+m_sashSize-2);
	422
	423	dc.SetPen(*m_darkShadowPen);
	424	dc.DrawLine(2, m_sashPosition+m_sashSize-1, w-2, m_sashPosition+m_sashSize-1);
	425	}
	426	}
	427	else
	428	{
	429	if ( m_splitMode == wxSPLIT_VERTICAL )
	430	{
	431	dc.SetPen(*wxBLACK_PEN);
	432	dc.SetBrush(*wxBLACK_BRUSH);
	433	int h1 = h-1;
	434	if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
	435	h1 += 1; // Not sure why this is necessary...
	436	dc.DrawRectangle(m_sashPosition, 0, m_sashSize, h1);
	437	}
	438	else
	439	{
	440	dc.SetPen(*wxBLACK_PEN);
	441	dc.SetBrush(*wxBLACK_BRUSH);
	442	int w1 = w-1;
	443	if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER )
	444	w1 ++;
	445
	446	dc.DrawRectangle(0, m_sashPosition, w1, m_sashSize);
	447	}
	448
	449	}
	450
	451	dc.SetPen(wxNullPen);
	452	dc.SetBrush(wxNullBrush);
	453	}
	454
	455	// Draw the sash tracker (for whilst moving the sash)
	456	void wxSplitterWindow::DrawSashTracker(int x, int y)
	457	{
	458	int w, h;
	459	GetClientSize(&w, &h);
	460
	461	wxScreenDC screenDC;
	462	int x1, y1;
	463	int x2, y2;
	464
	465	if ( m_splitMode == wxSPLIT_VERTICAL )
	466	{
	467	x1 = x; y1 = 2;
	468	x2 = x; y2 = h-2;
	469
	470	if ( x1 > w )
	471	{
	472	x1 = w; x2 = w;
	473	}
	474	else if ( x1 < 0 )
	475	{
	476	x1 = 0; x2 = 0;
	477	}
	478	}
	479	else
	480	{
	481	x1 = 2; y1 = y;
	482	x2 = w-2; y2 = y;
	483
	484	if ( y1 > h )
	485	{
	486	y1 = h;
	487	y2 = h;
	488	}
	489	else if ( y1 < 0 )
	490	{
	491	y1 = 0;
	492	y2 = 0;
	493	}
	494	}
	495
	496	ClientToScreen(&x1, &y1);
	497	ClientToScreen(&x2, &y2);
	498
	499	screenDC.SetLogicalFunction(wxXOR);
	500	screenDC.SetPen(*m_sashTrackerPen);
	501	screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
	502
	503	screenDC.DrawLine(x1, y1, x2, y2);
	504
	505	screenDC.SetLogicalFunction(wxCOPY);
	506
	507	screenDC.SetPen(wxNullPen);
	508	screenDC.SetBrush(wxNullBrush);
	509	}
	510
	511	// Position and size subwindows.
	512	// Note that the border size applies to each subwindow, not
	513	// including the edges next to the sash.
	514	void wxSplitterWindow::SizeWindows()
	515	{
	516	int w, h;
	517	GetClientSize(&w, &h);
	518
	519	if ( m_windowOne && !m_windowTwo )
	520	{
	521	m_windowOne->SetSize(m_borderSize, m_borderSize, w - 2m_borderSize, h - 2m_borderSize);
	522
	523	if (m_windowOne->GetAutoLayout())
	524	m_windowOne->Layout();
	525	}
	526	else if ( m_windowOne && m_windowTwo )
	527	{
	528	if (m_splitMode == wxSPLIT_VERTICAL)
	529	{
	530	int x1 = m_borderSize;
	531	int y1 = m_borderSize;
	532	int w1 = m_sashPosition - m_borderSize;
	533	int h1 = h - 2*m_borderSize;
	534
	535	int x2 = m_sashPosition + m_sashSize;
	536	int y2 = m_borderSize;
	537	int w2 = w - 2*m_borderSize - m_sashSize - w1;
	538	int h2 = h - 2*m_borderSize;
	539
	540	m_windowOne->SetSize(x1, y1, w1, h1);
	541	m_windowTwo->SetSize(x2, y2, w2, h2);
	542
	543	if (m_windowOne->GetAutoLayout())
	544	m_windowOne->Layout();
	545	if (m_windowTwo->GetAutoLayout())
	546	m_windowTwo->Layout();
	547	}
	548	else
	549	{
	550	m_windowOne->SetSize(m_borderSize, m_borderSize,
	551	w - 2*m_borderSize, m_sashPosition - m_borderSize);
	552	m_windowTwo->SetSize(m_borderSize, m_sashPosition + m_sashSize,
	553	w - 2m_borderSize, h - 2m_borderSize - m_sashSize - (m_sashPosition - m_borderSize));
	554
	555	if (m_windowOne->GetAutoLayout())
	556	m_windowOne->Layout();
	557	if (m_windowTwo->GetAutoLayout())
	558	m_windowTwo->Layout();
	559	}
	560	}
	561	wxClientDC dc(this);
	562	DrawBorders(dc);
	563	DrawSash(dc);
	564	}
	565
	566	// Set pane for unsplit window
	567	void wxSplitterWindow::Initialize(wxWindow *window)
	568	{
	569	m_windowOne = window;
	570	m_windowTwo = (wxWindow *) NULL;
	571	m_sashPosition = 0;
	572	}
	573
	574	// Associates the given window with window 2, drawing the appropriate sash
	575	// and changing the split mode.
	576	// Does nothing and returns FALSE if the window is already split.
	577	bool wxSplitterWindow::SplitVertically(wxWindow window1, wxWindow window2, int sashPosition)
	578	{
	579	if ( IsSplit() )
	580	return FALSE;
	581
	582	int w, h;
	583	GetClientSize(&w, &h);
	584
	585	m_splitMode = wxSPLIT_VERTICAL;
	586	m_windowOne = window1;
	587	m_windowTwo = window2;
	588	if ( sashPosition > 0 )
	589	m_sashPosition = sashPosition;
	590	else if ( sashPosition < 0 )
	591	m_sashPosition = w - sashPosition;
	592	else // default
	593	m_sashPosition = w/2;
	594
	595	SizeWindows();
	596
	597	return TRUE;
	598	}
	599
	600	bool wxSplitterWindow::SplitHorizontally(wxWindow window1, wxWindow window2, int sashPosition)
	601	{
	602	if ( IsSplit() )
	603	return FALSE;
	604
	605	int w, h;
	606	GetClientSize(&w, &h);
	607
	608	m_splitMode = wxSPLIT_HORIZONTAL;
	609	m_windowOne = window1;
	610	m_windowTwo = window2;
	611	if ( sashPosition > 0 )
	612	m_sashPosition = sashPosition;
	613	else if ( sashPosition < 0 )
	614	m_sashPosition = h - sashPosition;
	615	else // default
	616	m_sashPosition = h/2;
	617
	618	SizeWindows();
	619
	620	return TRUE;
	621	}
	622
	623
	624	// Remove the specified (or second) window from the view
	625	// Doesn't actually delete the window.
	626	bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
	627	{
	628	if ( ! IsSplit() )
	629	return FALSE;
	630
	631	wxWindow *win = NULL;
	632	if ( toRemove == NULL \|\| toRemove == m_windowTwo)
	633	{
	634	win = m_windowTwo ;
	635	m_windowTwo = (wxWindow *) NULL;
	636	}
	637	else if ( toRemove == m_windowOne )
	638	{
	639	win = m_windowOne ;
	640	m_windowOne = m_windowTwo;
	641	m_windowTwo = (wxWindow *) NULL;
	642	}
	643	else
	644	{
	645	wxFAIL_MSG(_T("splitter: attempt to remove a non-existent window"));
	646
	647	return FALSE;
	648	}
	649
	650	SendUnsplitEvent(win);
	651	m_sashPosition = 0;
	652	SizeWindows();
	653
	654	return TRUE;
	655	}
	656
	657	// Replace a window with another one
	658	bool wxSplitterWindow::ReplaceWindow(wxWindow winOld, wxWindow winNew)
	659	{
	660	wxCHECK_MSG( winOld, FALSE, _T("use one of Split() functions instead") );
	661	wxCHECK_MSG( winNew, FALSE, _T("use Unsplit() functions instead") );
	662
	663	if ( winOld == m_windowTwo )
	664	{
	665	m_windowTwo = winNew;
	666	}
	667	else if ( winOld == m_windowOne )
	668	{
	669	m_windowOne = winNew;
	670	}
	671	else
	672	{
	673	wxFAIL_MSG(_T("splitter: attempt to replace a non-existent window"));
	674
	675	return FALSE;
	676	}
	677
	678	SizeWindows();
	679
	680	return TRUE;
	681	}
	682
	683	void wxSplitterWindow::SetSashPosition(int position, bool redraw)
	684	{
	685	m_sashPosition = position;
	686
	687	if ( redraw )
	688	{
	689	SizeWindows();
	690	}
	691	}
	692
	693	// Initialize colours
	694	void wxSplitterWindow::InitColours()
	695	{
	696	wxDELETE( m_facePen );
	697	wxDELETE( m_faceBrush );
	698	wxDELETE( m_mediumShadowPen );
	699	wxDELETE( m_darkShadowPen );
	700	wxDELETE( m_lightShadowPen );
	701	wxDELETE( m_hilightPen );
	702
	703	// Shadow colours
	704	#if defined(__WIN95__)
	705	wxColour faceColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
	706	m_facePen = new wxPen(faceColour, 1, wxSOLID);
	707	m_faceBrush = new wxBrush(faceColour, wxSOLID);
	708
	709	wxColour mediumShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW));
	710	m_mediumShadowPen = new wxPen(mediumShadowColour, 1, wxSOLID);
	711
	712	wxColour darkShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW));
	713	m_darkShadowPen = new wxPen(darkShadowColour, 1, wxSOLID);
	714
	715	wxColour lightShadowColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT));
	716	m_lightShadowPen = new wxPen(lightShadowColour, 1, wxSOLID);
	717
	718	wxColour hilightColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT));
	719	m_hilightPen = new wxPen(hilightColour, 1, wxSOLID);
	720	#else // !Win32
	721	m_facePen = new wxPen("LIGHT GREY", 1, wxSOLID);
	722	m_faceBrush = new wxBrush("LIGHT GREY", wxSOLID);
	723	m_mediumShadowPen = new wxPen("GREY", 1, wxSOLID);
	724	m_darkShadowPen = new wxPen("BLACK", 1, wxSOLID);
	725	m_lightShadowPen = new wxPen("LIGHT GREY", 1, wxSOLID);
	726	m_hilightPen = new wxPen("WHITE", 1, wxSOLID);
	727	#endif // Win32/!Win32
	728	}
	729
	730	void wxSplitterWindow::SendUnsplitEvent(wxWindow *winRemoved)
	731	{
	732	wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
	733	event.m_data.win = winRemoved;
	734
	735	(void)GetEventHandler()->ProcessEvent(event);
	736	}
	737
	738	// ---------------------------------------------------------------------------
	739	// splitter event handlers
	740	// ---------------------------------------------------------------------------
	741
	742	void wxSplitterWindow::OnSashPosChanged(wxSplitterEvent& event)
	743	{
	744	// If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
	745	const int UNSPLIT_THRESHOLD = 4;
	746
	747	int newSashPosition = event.GetSashPosition();
	748
	749	// Obtain relevant window dimension for bottom / right threshold check
	750	int w, h;
	751	GetClientSize(&w, &h);
	752	int window_size = (m_splitMode == wxSPLIT_VERTICAL) ? w : h ;
	753
	754	if ( newSashPosition <= UNSPLIT_THRESHOLD )
	755	{
	756	// threshold top / left check
	757	newSashPosition = 0;
	758	}
	759	else if ( newSashPosition < m_minimumPaneSize )
	760	{
	761	// If resultant pane would be too small, enlarge it
	762	newSashPosition = m_minimumPaneSize;
	763	}
	764
	765	if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
	766	{
	767	// threshold bottom/right check
	768	newSashPosition = window_size;
	769	}
	770	else if ( newSashPosition > window_size - m_minimumPaneSize )
	771	{
	772	// If resultant pane would be too small, enlarge it
	773	newSashPosition = window_size - m_minimumPaneSize;
	774	}
	775
	776	// If the result is out of bounds it means minimum size is too big,
	777	// so split window in half as best compromise.
	778	if ( newSashPosition < 0 \|\| newSashPosition > window_size )
	779	newSashPosition = window_size / 2;
	780
	781	// for compatibility, call the virtual function
	782	if ( !OnSashPositionChange(newSashPosition) )
	783	{
	784	newSashPosition = -1;
	785	}
	786
	787	event.SetSashPosition(newSashPosition);
	788	}
	789
	790	// Called when the sash is double-clicked. The default behaviour is to remove
	791	// the sash if the minimum pane size is zero.
	792	void wxSplitterWindow::OnDoubleClick(wxSplitterEvent& event)
	793	{
	794	// for compatibility, call the virtual function
	795	OnDoubleClickSash(event.GetX(), event.GetY());
	796
	797	if ( GetMinimumPaneSize() == 0 )
	798	{
	799	Unsplit();
	800	}
	801	}
	802
	803	void wxSplitterWindow::OnUnsplitEvent(wxSplitterEvent& event)
	804	{
	805	wxWindow *win = event.GetWindowBeingRemoved();
	806
	807	// for compatibility, call the virtual function
	808	OnUnsplit(win);
	809
	810	win->Show(FALSE);
	811	}