src/generic/sashwin.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/generic/sashwin.cpp
// Purpose:     wxSashWindow implementation. A sash window has an optional
//              sash on each edge, allowing it to be dragged. An event
//              is generated when the sash is released.
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_SASH

#include "wx/sashwin.h"

#ifndef WX_PRECOMP
    #include "wx/dialog.h"
    #include "wx/frame.h"
    #include "wx/settings.h"
    #include "wx/dcclient.h"
    #include "wx/dcscreen.h"
    #include "wx/math.h"
#endif

#include <stdlib.h>

#include "wx/laywin.h"

wxDEFINE_EVENT( wxEVT_SASH_DRAGGED, wxSashEvent );

IMPLEMENT_DYNAMIC_CLASS(wxSashWindow, wxWindow)
IMPLEMENT_DYNAMIC_CLASS(wxSashEvent, wxCommandEvent)

BEGIN_EVENT_TABLE(wxSashWindow, wxWindow)
    EVT_PAINT(wxSashWindow::OnPaint)
    EVT_SIZE(wxSashWindow::OnSize)
    EVT_MOUSE_EVENTS(wxSashWindow::OnMouseEvent)
#if defined( __WXMSW__ ) || defined( __WXMAC__)
    EVT_SET_CURSOR(wxSashWindow::OnSetCursor)
#endif // __WXMSW__ || __WXMAC__

END_EVENT_TABLE()

bool wxSashWindow::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos,
    const wxSize& size, long style, const wxString& name)
{
    return wxWindow::Create(parent, id, pos, size, style, name);
}

wxSashWindow::~wxSashWindow()
{
    delete m_sashCursorWE;
    delete m_sashCursorNS;
}

void wxSashWindow::Init()
{
    m_draggingEdge = wxSASH_NONE;
    m_dragMode = wxSASH_DRAG_NONE;
    m_oldX = 0;
    m_oldY = 0;
    m_firstX = 0;
    m_firstY = 0;
    m_borderSize = 3;
    m_extraBorderSize = 0;
    m_minimumPaneSizeX = 0;
    m_minimumPaneSizeY = 0;
    m_maximumPaneSizeX = 10000;
    m_maximumPaneSizeY = 10000;
    m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
    m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
    m_mouseCaptured = false;
    m_currentCursor = NULL;

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

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

    DrawBorders(dc);
    DrawSashes(dc);
}

void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
{
    wxCoord x = 0, y = 0;
    event.GetPosition(&x, &y);

    wxSashEdgePosition sashHit = SashHitTest(x, y);

    if (event.LeftDown())
    {
        CaptureMouse();
        m_mouseCaptured = true;

        if ( sashHit != wxSASH_NONE )
        {
            // Required for X to specify that
            // that we wish to draw on top of all windows
            // - and we optimise by specifying the area
            // for creating the overlap window.
            // Find the first frame or dialog and use this to specify
            // the area to draw on.
            wxWindow* parent = this;

            while (parent && !wxDynamicCast(parent, wxDialog) &&
                             !wxDynamicCast(parent, wxFrame))
              parent = parent->GetParent();

            wxScreenDC::StartDrawingOnTop(parent);

            // We don't say we're dragging yet; we leave that
            // decision for the Dragging() branch, to ensure
            // the user has dragged a little bit.
            m_dragMode = wxSASH_DRAG_LEFT_DOWN;
            m_draggingEdge = sashHit;
            m_firstX = x;
            m_firstY = y;

            if ( (sashHit == wxSASH_LEFT) || (sashHit == wxSASH_RIGHT) )
            {
                if (m_currentCursor != m_sashCursorWE)
                {
                    SetCursor(*m_sashCursorWE);
                }
                m_currentCursor = m_sashCursorWE;
            }
            else
            {
                if (m_currentCursor != m_sashCursorNS)
                {
                    SetCursor(*m_sashCursorNS);
                }
                m_currentCursor = m_sashCursorNS;
            }
        }
    }
    else if ( event.LeftUp() && m_dragMode == wxSASH_DRAG_LEFT_DOWN )
    {
        // Wasn't a proper drag
        if (m_mouseCaptured)
            ReleaseMouse();
        m_mouseCaptured = false;

        wxScreenDC::EndDrawingOnTop();
        m_dragMode = wxSASH_DRAG_NONE;
        m_draggingEdge = wxSASH_NONE;
    }
    else if (event.LeftUp() && m_dragMode == wxSASH_DRAG_DRAGGING)
    {
        // We can stop dragging now and see what we've got.
        m_dragMode = wxSASH_DRAG_NONE;
        if (m_mouseCaptured)
            ReleaseMouse();
        m_mouseCaptured = false;

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

        // End drawing on top (frees the window used for drawing
        // over the screen)
        wxScreenDC::EndDrawingOnTop();

        int w, h;
        GetSize(&w, &h);
        int xp, yp;
        GetPosition(&xp, &yp);

        wxSashEdgePosition edge = m_draggingEdge;
        m_draggingEdge = wxSASH_NONE;

        wxRect dragRect;
        wxSashDragStatus status = wxSASH_STATUS_OK;

        // the new height and width of the window - if -1, it didn't change
        int newHeight = wxDefaultCoord,
            newWidth = wxDefaultCoord;

        // NB: x and y may be negative and they're relative to the sash window
        //     upper left corner, while xp and yp are expressed in the parent
        //     window system of coordinates, so adjust them! After this
        //     adjustment, all coordinates are relative to the parent window.
        y += yp;
        x += xp;

        switch (edge)
        {
            case wxSASH_TOP:
                if ( y > yp + h )
                {
                    // top sash shouldn't get below the bottom one
                    status = wxSASH_STATUS_OUT_OF_RANGE;
                }
                else
                {
                    newHeight = h - (y - yp);
                }
                break;

            case wxSASH_BOTTOM:
                if ( y < yp )
                {
                    // bottom sash shouldn't get above the top one
                    status = wxSASH_STATUS_OUT_OF_RANGE;
                }
                else
                {
                    newHeight = y - yp;
                }
                break;

            case wxSASH_LEFT:
                if ( x > xp + w )
                {
                    // left sash shouldn't get beyond the right one
                    status = wxSASH_STATUS_OUT_OF_RANGE;
                }
                else
                {
                    newWidth = w - (x - xp);
                }
                break;

            case wxSASH_RIGHT:
                if ( x < xp )
                {
                    // and the right sash, finally, shouldn't be beyond the
                    // left one
                    status = wxSASH_STATUS_OUT_OF_RANGE;
                }
                else
                {
                    newWidth = x - xp;
                }
                break;

            case wxSASH_NONE:
                // can this happen at all?
                break;
        }

        if ( newHeight == wxDefaultCoord )
        {
            // didn't change
            newHeight = h;
        }
        else
        {
            // make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
            newHeight = wxMax(newHeight, m_minimumPaneSizeY);
            newHeight = wxMin(newHeight, m_maximumPaneSizeY);
        }

        if ( newWidth == wxDefaultCoord )
        {
            // didn't change
            newWidth = w;
        }
        else
        {
            // make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
            newWidth = wxMax(newWidth, m_minimumPaneSizeX);
            newWidth = wxMin(newWidth, m_maximumPaneSizeX);
        }

        dragRect = wxRect(x, y, newWidth, newHeight);

        wxSashEvent eventSash(GetId(), edge);
        eventSash.SetEventObject(this);
        eventSash.SetDragStatus(status);
        eventSash.SetDragRect(dragRect);
        GetEventHandler()->ProcessEvent(eventSash);
    }
    else if ( event.LeftUp() )
    {
        if (m_mouseCaptured)
           ReleaseMouse();
        m_mouseCaptured = false;
    }
    else if ((event.Moving() || event.Leaving()) && !event.Dragging())
    {
        // Just change the cursor if required
        if ( sashHit != wxSASH_NONE )
        {
            if ( (sashHit == wxSASH_LEFT) || (sashHit == wxSASH_RIGHT) )
            {
                if (m_currentCursor != m_sashCursorWE)
                {
                    SetCursor(*m_sashCursorWE);
                }
                m_currentCursor = m_sashCursorWE;
            }
            else
            {
                if (m_currentCursor != m_sashCursorNS)
                {
                    SetCursor(*m_sashCursorNS);
                }
                m_currentCursor = m_sashCursorNS;
            }
        }
        else
        {
            SetCursor(wxNullCursor);
            m_currentCursor = NULL;
        }
    }
    else if ( event.Dragging() &&
              ((m_dragMode == wxSASH_DRAG_DRAGGING) ||
               (m_dragMode == wxSASH_DRAG_LEFT_DOWN)) )
    {
        if ( (m_draggingEdge == wxSASH_LEFT) || (m_draggingEdge == wxSASH_RIGHT) )
        {
            if (m_currentCursor != m_sashCursorWE)
            {
                SetCursor(*m_sashCursorWE);
            }
            m_currentCursor = m_sashCursorWE;
        }
        else
        {
            if (m_currentCursor != m_sashCursorNS)
            {
                SetCursor(*m_sashCursorNS);
            }
            m_currentCursor = m_sashCursorNS;
        }

        if (m_dragMode == wxSASH_DRAG_LEFT_DOWN)
        {
            m_dragMode = wxSASH_DRAG_DRAGGING;
            DrawSashTracker(m_draggingEdge, x, y);
        }
        else
        {
            if ( m_dragMode == wxSASH_DRAG_DRAGGING )
            {
                // Erase old tracker
                DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);

                // Draw new one
                DrawSashTracker(m_draggingEdge, x, y);
            }
        }
        m_oldX = x;
        m_oldY = y;
    }
    else if ( event.LeftDClick() )
    {
        // Nothing
    }
    else
    {
    }
}

void wxSashWindow::OnSize(wxSizeEvent& WXUNUSED(event))
{
    SizeWindows();
}

wxSashEdgePosition wxSashWindow::SashHitTest(int x, int y, int WXUNUSED(tolerance))
{
    int cx, cy;
    GetClientSize(& cx, & cy);

    int i;
    for (i = 0; i < 4; i++)
    {
        wxSashEdge& edge = m_sashes[i];
        wxSashEdgePosition position = (wxSashEdgePosition) i ;

        if (edge.m_show)
        {
            switch (position)
            {
                case wxSASH_TOP:
                {
                    if (y >= 0 && y <= GetEdgeMargin(position))
                        return wxSASH_TOP;
                    break;
                }
                case wxSASH_RIGHT:
                {
                    if ((x >= cx - GetEdgeMargin(position)) && (x <= cx))
                        return wxSASH_RIGHT;
                    break;
                }
                case wxSASH_BOTTOM:
                {
                    if ((y >= cy - GetEdgeMargin(position)) && (y <= cy))
                        return wxSASH_BOTTOM;
                    break;
                }
                case wxSASH_LEFT:
                {
                    if ((x <= GetEdgeMargin(position)) && (x >= 0))
                        return wxSASH_LEFT;
                    break;
                }
                case wxSASH_NONE:
                {
                    break;
                }
            }
        }
    }
    return wxSASH_NONE;
}

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

    wxPen mediumShadowPen(m_mediumShadowColour, 1, wxPENSTYLE_SOLID);
    wxPen darkShadowPen(m_darkShadowColour, 1, wxPENSTYLE_SOLID);
    wxPen lightShadowPen(m_lightShadowColour, 1, wxPENSTYLE_SOLID);
    wxPen hilightPen(m_hilightColour, 1, wxPENSTYLE_SOLID);

    if ( GetWindowStyleFlag() & wxSW_3DBORDER )
    {
        dc.SetPen(mediumShadowPen);
        dc.DrawLine(0, 0, w-1, 0);
        dc.DrawLine(0, 0, 0, h - 1);

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

        dc.SetPen(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(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() & wxSW_BORDER )
    {
        dc.SetBrush(*wxTRANSPARENT_BRUSH);
        dc.SetPen(*wxBLACK_PEN);
        dc.DrawRectangle(0, 0, w-1, h-1);
    }

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

void wxSashWindow::DrawSashes(wxDC& dc)
{
    int i;
    for (i = 0; i < 4; i++)
        if (m_sashes[i].m_show)
            DrawSash((wxSashEdgePosition) i, dc);
}

// Draw the sash
void wxSashWindow::DrawSash(wxSashEdgePosition edge, wxDC& dc)
{
    int w, h;
    GetClientSize(&w, &h);

    wxPen facePen(m_faceColour, 1, wxPENSTYLE_SOLID);
    wxBrush faceBrush(m_faceColour, wxBRUSHSTYLE_SOLID);
    wxPen mediumShadowPen(m_mediumShadowColour, 1, wxPENSTYLE_SOLID);
    wxPen darkShadowPen(m_darkShadowColour, 1, wxPENSTYLE_SOLID);
    wxPen lightShadowPen(m_lightShadowColour, 1, wxPENSTYLE_SOLID);
    wxPen hilightPen(m_hilightColour, 1, wxPENSTYLE_SOLID);
    wxColour blackClr(0, 0, 0);
    wxColour whiteClr(255, 255, 255);
    wxPen blackPen(blackClr, 1, wxPENSTYLE_SOLID);
    wxPen whitePen(whiteClr, 1, wxPENSTYLE_SOLID);

    if ( edge == wxSASH_LEFT || edge == wxSASH_RIGHT )
    {
        int sashPosition = (edge == wxSASH_LEFT) ? 0 : ( w - GetEdgeMargin(edge) );

        dc.SetPen(facePen);
        dc.SetBrush(faceBrush);
        dc.DrawRectangle(sashPosition, 0, GetEdgeMargin(edge), h);

        if (GetWindowStyleFlag() & wxSW_3DSASH)
        {
            if (edge == wxSASH_LEFT)
            {
                // Draw a dark grey line on the left to indicate that the
                // sash is raised
                dc.SetPen(mediumShadowPen);
                dc.DrawLine(GetEdgeMargin(edge), 0, GetEdgeMargin(edge), h);
            }
            else
            {
                // Draw a highlight line on the right to indicate that the
                // sash is raised
                dc.SetPen(hilightPen);
                dc.DrawLine(w - GetEdgeMargin(edge), 0, w - GetEdgeMargin(edge), h);
            }
        }
    }
    else // top or bottom
    {
        int sashPosition = (edge == wxSASH_TOP) ? 0 : ( h - GetEdgeMargin(edge) );

        dc.SetPen(facePen);
        dc.SetBrush(faceBrush);
        dc.DrawRectangle(0, sashPosition, w, GetEdgeMargin(edge));

        if (GetWindowStyleFlag() & wxSW_3DSASH)
        {
            if (edge == wxSASH_BOTTOM)
            {
                // Draw a highlight line on the bottom to indicate that the
                // sash is raised
                dc.SetPen(hilightPen);
                dc.DrawLine(0, h - GetEdgeMargin(edge), w, h - GetEdgeMargin(edge));
            }
            else
            {
                // Draw a drak grey line on the top to indicate that the
                // sash is raised
                dc.SetPen(mediumShadowPen);
                dc.DrawLine(1, GetEdgeMargin(edge), w-1, GetEdgeMargin(edge));
            }
        }
    }

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

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

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

    if ( edge == wxSASH_LEFT || edge == wxSASH_RIGHT )
    {
        x1 = x; y1 = 2;
        x2 = x; y2 = h-2;

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

        if ( (edge == wxSASH_TOP) && (y1 > h) )
        {
            y1 = h;
            y2 = h;
        }
        else if ( (edge == wxSASH_BOTTOM) && (y1 < 0) )
        {
            y1 = 0;
            y2 = 0;
        }
    }

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

    wxPen sashTrackerPen(*wxBLACK, 2, wxPENSTYLE_SOLID);

    screenDC.SetLogicalFunction(wxINVERT);
    screenDC.SetPen(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 wxSashWindow::SizeWindows()
{
    int cw, ch;
    GetClientSize(&cw, &ch);

    if (GetChildren().GetCount() == 1)
    {
        wxWindow* child = GetChildren().GetFirst()->GetData();

        int x = 0;
        int y = 0;
        int width = cw;
        int height = ch;

        // Top
        if (m_sashes[0].m_show)
        {
            y = m_borderSize;
            height -= m_borderSize;
        }
        y += m_extraBorderSize;

        // Left
        if (m_sashes[3].m_show)
        {
            x = m_borderSize;
            width -= m_borderSize;
        }
        x += m_extraBorderSize;

        // Right
        if (m_sashes[1].m_show)
        {
            width -= m_borderSize;
        }
        width -= 2*m_extraBorderSize;

        // Bottom
        if (m_sashes[2].m_show)
        {
            height -= m_borderSize;
        }
        height -= 2*m_extraBorderSize;

        child->SetSize(x, y, width, height);
    }
    else if (GetChildren().GetCount() > 1)
    {
        // Perhaps multiple children are themselves sash windows.
        // TODO: this doesn't really work because the subwindows sizes/positions
        // must be set to leave a gap for the parent's sash (hit-test and decorations).
        // Perhaps we can allow for this within LayoutWindow, testing whether the parent
        // is a sash window, and if so, allowing some space for the edges.
        wxLayoutAlgorithm layout;
        layout.LayoutWindow(this);
    }

    wxClientDC dc(this);
    DrawBorders(dc);
    DrawSashes(dc);
}

// Initialize colours
void wxSashWindow::InitColours()
{
    // Shadow colours
    m_faceColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
    m_mediumShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW);
    m_darkShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW);
    m_lightShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT);
    m_hilightColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT);
}

void wxSashWindow::SetSashVisible(wxSashEdgePosition edge, bool sash)
{
     m_sashes[edge].m_show = sash;
     if (sash)
        m_sashes[edge].m_margin = m_borderSize;
     else
        m_sashes[edge].m_margin = 0;
}

#if defined( __WXMSW__ ) || defined( __WXMAC__)

// this is currently called (and needed) under MSW only...
void wxSashWindow::OnSetCursor(wxSetCursorEvent& event)
{
    // if we don't do it, the resizing cursor might be set for child window:
    // and like this we explicitly say that our cursor should not be used for
    // children windows which overlap us

    if ( SashHitTest(event.GetX(), event.GetY()) != wxSASH_NONE)
    {
        // default processing is ok
        event.Skip();
    }
    //else: do nothing, in particular, don't call Skip()
}

#endif // __WXMSW__ || __WXMAC__

#endif // wxUSE_SASH
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: src/generic/sashwin.cpp
	3	// Purpose: wxSashWindow implementation. A sash window has an optional
	4	// sash on each edge, allowing it to be dragged. An event
	5	// is generated when the sash is released.
	6	// Author: Julian Smart
	7	// Modified by:
	8	// Created: 01/02/97
	9	// RCS-ID: $Id$
	10	// Copyright: (c) Julian Smart
	11	// Licence: wxWindows licence
	12	/////////////////////////////////////////////////////////////////////////////
	13
	14	// For compilers that support precompilation, includes "wx.h".
	15	#include "wx/wxprec.h"
	16
	17	#ifdef __BORLANDC__
	18	#pragma hdrstop
	19	#endif
	20
	21	#if wxUSE_SASH
	22
	23	#include "wx/sashwin.h"
	24
	25	#ifndef WX_PRECOMP
	26	#include "wx/dialog.h"
	27	#include "wx/frame.h"
	28	#include "wx/settings.h"
	29	#include "wx/dcclient.h"
	30	#include "wx/dcscreen.h"
	31	#include "wx/math.h"
	32	#endif
	33
	34	#include <stdlib.h>
	35
	36	#include "wx/laywin.h"
	37
	38	wxDEFINE_EVENT( wxEVT_SASH_DRAGGED, wxSashEvent );
	39
	40	IMPLEMENT_DYNAMIC_CLASS(wxSashWindow, wxWindow)
	41	IMPLEMENT_DYNAMIC_CLASS(wxSashEvent, wxCommandEvent)
	42
	43	BEGIN_EVENT_TABLE(wxSashWindow, wxWindow)
	44	EVT_PAINT(wxSashWindow::OnPaint)
	45	EVT_SIZE(wxSashWindow::OnSize)
	46	EVT_MOUSE_EVENTS(wxSashWindow::OnMouseEvent)
	47	#if defined( __WXMSW__ ) \|\| defined( __WXMAC__)
	48	EVT_SET_CURSOR(wxSashWindow::OnSetCursor)
	49	#endif // __WXMSW__ \|\| __WXMAC__
	50
	51	END_EVENT_TABLE()
	52
	53	bool wxSashWindow::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos,
	54	const wxSize& size, long style, const wxString& name)
	55	{
	56	return wxWindow::Create(parent, id, pos, size, style, name);
	57	}
	58
	59	wxSashWindow::~wxSashWindow()
	60	{
	61	delete m_sashCursorWE;
	62	delete m_sashCursorNS;
	63	}
	64
	65	void wxSashWindow::Init()
	66	{
	67	m_draggingEdge = wxSASH_NONE;
	68	m_dragMode = wxSASH_DRAG_NONE;
	69	m_oldX = 0;
	70	m_oldY = 0;
	71	m_firstX = 0;
	72	m_firstY = 0;
	73	m_borderSize = 3;
	74	m_extraBorderSize = 0;
	75	m_minimumPaneSizeX = 0;
	76	m_minimumPaneSizeY = 0;
	77	m_maximumPaneSizeX = 10000;
	78	m_maximumPaneSizeY = 10000;
	79	m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
	80	m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
	81	m_mouseCaptured = false;
	82	m_currentCursor = NULL;
	83
	84	// Eventually, we'll respond to colour change messages
	85	InitColours();
	86	}
	87
	88	void wxSashWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
	89	{
	90	wxPaintDC dc(this);
	91
	92	DrawBorders(dc);
	93	DrawSashes(dc);
	94	}
	95
	96	void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
	97	{
	98	wxCoord x = 0, y = 0;
	99	event.GetPosition(&x, &y);
	100
	101	wxSashEdgePosition sashHit = SashHitTest(x, y);
	102
	103	if (event.LeftDown())
	104	{
	105	CaptureMouse();
	106	m_mouseCaptured = true;
	107
	108	if ( sashHit != wxSASH_NONE )
	109	{
	110	// Required for X to specify that
	111	// that we wish to draw on top of all windows
	112	// - and we optimise by specifying the area
	113	// for creating the overlap window.
	114	// Find the first frame or dialog and use this to specify
	115	// the area to draw on.
	116	wxWindow* parent = this;
	117
	118	while (parent && !wxDynamicCast(parent, wxDialog) &&
	119	!wxDynamicCast(parent, wxFrame))
	120	parent = parent->GetParent();
	121
	122	wxScreenDC::StartDrawingOnTop(parent);
	123
	124	// We don't say we're dragging yet; we leave that
	125	// decision for the Dragging() branch, to ensure
	126	// the user has dragged a little bit.
	127	m_dragMode = wxSASH_DRAG_LEFT_DOWN;
	128	m_draggingEdge = sashHit;
	129	m_firstX = x;
	130	m_firstY = y;
	131
	132	if ( (sashHit == wxSASH_LEFT) \|\| (sashHit == wxSASH_RIGHT) )
	133	{
	134	if (m_currentCursor != m_sashCursorWE)
	135	{
	136	SetCursor(*m_sashCursorWE);
	137	}
	138	m_currentCursor = m_sashCursorWE;
	139	}
	140	else
	141	{
	142	if (m_currentCursor != m_sashCursorNS)
	143	{
	144	SetCursor(*m_sashCursorNS);
	145	}
	146	m_currentCursor = m_sashCursorNS;
	147	}
	148	}
	149	}
	150	else if ( event.LeftUp() && m_dragMode == wxSASH_DRAG_LEFT_DOWN )
	151	{
	152	// Wasn't a proper drag
	153	if (m_mouseCaptured)
	154	ReleaseMouse();
	155	m_mouseCaptured = false;
	156
	157	wxScreenDC::EndDrawingOnTop();
	158	m_dragMode = wxSASH_DRAG_NONE;
	159	m_draggingEdge = wxSASH_NONE;
	160	}
	161	else if (event.LeftUp() && m_dragMode == wxSASH_DRAG_DRAGGING)
	162	{
	163	// We can stop dragging now and see what we've got.
	164	m_dragMode = wxSASH_DRAG_NONE;
	165	if (m_mouseCaptured)
	166	ReleaseMouse();
	167	m_mouseCaptured = false;
	168
	169	// Erase old tracker
	170	DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
	171
	172	// End drawing on top (frees the window used for drawing
	173	// over the screen)
	174	wxScreenDC::EndDrawingOnTop();
	175
	176	int w, h;
	177	GetSize(&w, &h);
	178	int xp, yp;
	179	GetPosition(&xp, &yp);
	180
	181	wxSashEdgePosition edge = m_draggingEdge;
	182	m_draggingEdge = wxSASH_NONE;
	183
	184	wxRect dragRect;
	185	wxSashDragStatus status = wxSASH_STATUS_OK;
	186
	187	// the new height and width of the window - if -1, it didn't change
	188	int newHeight = wxDefaultCoord,
	189	newWidth = wxDefaultCoord;
	190
	191	// NB: x and y may be negative and they're relative to the sash window
	192	// upper left corner, while xp and yp are expressed in the parent
	193	// window system of coordinates, so adjust them! After this
	194	// adjustment, all coordinates are relative to the parent window.
	195	y += yp;
	196	x += xp;
	197
	198	switch (edge)
	199	{
	200	case wxSASH_TOP:
	201	if ( y > yp + h )
	202	{
	203	// top sash shouldn't get below the bottom one
	204	status = wxSASH_STATUS_OUT_OF_RANGE;
	205	}
	206	else
	207	{
	208	newHeight = h - (y - yp);
	209	}
	210	break;
	211
	212	case wxSASH_BOTTOM:
	213	if ( y < yp )
	214	{
	215	// bottom sash shouldn't get above the top one
	216	status = wxSASH_STATUS_OUT_OF_RANGE;
	217	}
	218	else
	219	{
	220	newHeight = y - yp;
	221	}
	222	break;
	223
	224	case wxSASH_LEFT:
	225	if ( x > xp + w )
	226	{
	227	// left sash shouldn't get beyond the right one
	228	status = wxSASH_STATUS_OUT_OF_RANGE;
	229	}
	230	else
	231	{
	232	newWidth = w - (x - xp);
	233	}
	234	break;
	235
	236	case wxSASH_RIGHT:
	237	if ( x < xp )
	238	{
	239	// and the right sash, finally, shouldn't be beyond the
	240	// left one
	241	status = wxSASH_STATUS_OUT_OF_RANGE;
	242	}
	243	else
	244	{
	245	newWidth = x - xp;
	246	}
	247	break;
	248
	249	case wxSASH_NONE:
	250	// can this happen at all?
	251	break;
	252	}
	253
	254	if ( newHeight == wxDefaultCoord )
	255	{
	256	// didn't change
	257	newHeight = h;
	258	}
	259	else
	260	{
	261	// make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
	262	newHeight = wxMax(newHeight, m_minimumPaneSizeY);
	263	newHeight = wxMin(newHeight, m_maximumPaneSizeY);
	264	}
	265
	266	if ( newWidth == wxDefaultCoord )
	267	{
	268	// didn't change
	269	newWidth = w;
	270	}
	271	else
	272	{
	273	// make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
	274	newWidth = wxMax(newWidth, m_minimumPaneSizeX);
	275	newWidth = wxMin(newWidth, m_maximumPaneSizeX);
	276	}
	277
	278	dragRect = wxRect(x, y, newWidth, newHeight);
	279
	280	wxSashEvent eventSash(GetId(), edge);
	281	eventSash.SetEventObject(this);
	282	eventSash.SetDragStatus(status);
	283	eventSash.SetDragRect(dragRect);
	284	GetEventHandler()->ProcessEvent(eventSash);
	285	}
	286	else if ( event.LeftUp() )
	287	{
	288	if (m_mouseCaptured)
	289	ReleaseMouse();
	290	m_mouseCaptured = false;
	291	}
	292	else if ((event.Moving() \|\| event.Leaving()) && !event.Dragging())
	293	{
	294	// Just change the cursor if required
	295	if ( sashHit != wxSASH_NONE )
	296	{
	297	if ( (sashHit == wxSASH_LEFT) \|\| (sashHit == wxSASH_RIGHT) )
	298	{
	299	if (m_currentCursor != m_sashCursorWE)
	300	{
	301	SetCursor(*m_sashCursorWE);
	302	}
	303	m_currentCursor = m_sashCursorWE;
	304	}
	305	else
	306	{
	307	if (m_currentCursor != m_sashCursorNS)
	308	{
	309	SetCursor(*m_sashCursorNS);
	310	}
	311	m_currentCursor = m_sashCursorNS;
	312	}
	313	}
	314	else
	315	{
	316	SetCursor(wxNullCursor);
	317	m_currentCursor = NULL;
	318	}
	319	}
	320	else if ( event.Dragging() &&
	321	((m_dragMode == wxSASH_DRAG_DRAGGING) \|\|
	322	(m_dragMode == wxSASH_DRAG_LEFT_DOWN)) )
	323	{
	324	if ( (m_draggingEdge == wxSASH_LEFT) \|\| (m_draggingEdge == wxSASH_RIGHT) )
	325	{
	326	if (m_currentCursor != m_sashCursorWE)
	327	{
	328	SetCursor(*m_sashCursorWE);
	329	}
	330	m_currentCursor = m_sashCursorWE;
	331	}
	332	else
	333	{
	334	if (m_currentCursor != m_sashCursorNS)
	335	{
	336	SetCursor(*m_sashCursorNS);
	337	}
	338	m_currentCursor = m_sashCursorNS;
	339	}
	340
	341	if (m_dragMode == wxSASH_DRAG_LEFT_DOWN)
	342	{
	343	m_dragMode = wxSASH_DRAG_DRAGGING;
	344	DrawSashTracker(m_draggingEdge, x, y);
	345	}
	346	else
	347	{
	348	if ( m_dragMode == wxSASH_DRAG_DRAGGING )
	349	{
	350	// Erase old tracker
	351	DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
	352
	353	// Draw new one
	354	DrawSashTracker(m_draggingEdge, x, y);
	355	}
	356	}
	357	m_oldX = x;
	358	m_oldY = y;
	359	}
	360	else if ( event.LeftDClick() )
	361	{
	362	// Nothing
	363	}
	364	else
	365	{
	366	}
	367	}
	368
	369	void wxSashWindow::OnSize(wxSizeEvent& WXUNUSED(event))
	370	{
	371	SizeWindows();
	372	}
	373
	374	wxSashEdgePosition wxSashWindow::SashHitTest(int x, int y, int WXUNUSED(tolerance))
	375	{
	376	int cx, cy;
	377	GetClientSize(& cx, & cy);
	378
	379	int i;
	380	for (i = 0; i < 4; i++)
	381	{
	382	wxSashEdge& edge = m_sashes[i];
	383	wxSashEdgePosition position = (wxSashEdgePosition) i ;
	384
	385	if (edge.m_show)
	386	{
	387	switch (position)
	388	{
	389	case wxSASH_TOP:
	390	{
	391	if (y >= 0 && y <= GetEdgeMargin(position))
	392	return wxSASH_TOP;
	393	break;
	394	}
	395	case wxSASH_RIGHT:
	396	{
	397	if ((x >= cx - GetEdgeMargin(position)) && (x <= cx))
	398	return wxSASH_RIGHT;
	399	break;
	400	}
	401	case wxSASH_BOTTOM:
	402	{
	403	if ((y >= cy - GetEdgeMargin(position)) && (y <= cy))
	404	return wxSASH_BOTTOM;
	405	break;
	406	}
	407	case wxSASH_LEFT:
	408	{
	409	if ((x <= GetEdgeMargin(position)) && (x >= 0))
	410	return wxSASH_LEFT;
	411	break;
	412	}
	413	case wxSASH_NONE:
	414	{
	415	break;
	416	}
	417	}
	418	}
	419	}
	420	return wxSASH_NONE;
	421	}
	422
	423	// Draw 3D effect borders
	424	void wxSashWindow::DrawBorders(wxDC& dc)
	425	{
	426	int w, h;
	427	GetClientSize(&w, &h);
	428
	429	wxPen mediumShadowPen(m_mediumShadowColour, 1, wxPENSTYLE_SOLID);
	430	wxPen darkShadowPen(m_darkShadowColour, 1, wxPENSTYLE_SOLID);
	431	wxPen lightShadowPen(m_lightShadowColour, 1, wxPENSTYLE_SOLID);
	432	wxPen hilightPen(m_hilightColour, 1, wxPENSTYLE_SOLID);
	433
	434	if ( GetWindowStyleFlag() & wxSW_3DBORDER )
	435	{
	436	dc.SetPen(mediumShadowPen);
	437	dc.DrawLine(0, 0, w-1, 0);
	438	dc.DrawLine(0, 0, 0, h - 1);
	439
	440	dc.SetPen(darkShadowPen);
	441	dc.DrawLine(1, 1, w-2, 1);
	442	dc.DrawLine(1, 1, 1, h-2);
	443
	444	dc.SetPen(hilightPen);
	445	dc.DrawLine(0, h-1, w-1, h-1);
	446	dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
	447	/// Anyway, h is required for MSW.
	448
	449	dc.SetPen(lightShadowPen);
	450	dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
	451	dc.DrawLine(1, h-2, w-1, h-2); // Bottom
	452	}
	453	else if ( GetWindowStyleFlag() & wxSW_BORDER )
	454	{
	455	dc.SetBrush(*wxTRANSPARENT_BRUSH);
	456	dc.SetPen(*wxBLACK_PEN);
	457	dc.DrawRectangle(0, 0, w-1, h-1);
	458	}
	459
	460	dc.SetPen(wxNullPen);
	461	dc.SetBrush(wxNullBrush);
	462	}
	463
	464	void wxSashWindow::DrawSashes(wxDC& dc)
	465	{
	466	int i;
	467	for (i = 0; i < 4; i++)
	468	if (m_sashes[i].m_show)
	469	DrawSash((wxSashEdgePosition) i, dc);
	470	}
	471
	472	// Draw the sash
	473	void wxSashWindow::DrawSash(wxSashEdgePosition edge, wxDC& dc)
	474	{
	475	int w, h;
	476	GetClientSize(&w, &h);
	477
	478	wxPen facePen(m_faceColour, 1, wxPENSTYLE_SOLID);
	479	wxBrush faceBrush(m_faceColour, wxBRUSHSTYLE_SOLID);
	480	wxPen mediumShadowPen(m_mediumShadowColour, 1, wxPENSTYLE_SOLID);
	481	wxPen darkShadowPen(m_darkShadowColour, 1, wxPENSTYLE_SOLID);
	482	wxPen lightShadowPen(m_lightShadowColour, 1, wxPENSTYLE_SOLID);
	483	wxPen hilightPen(m_hilightColour, 1, wxPENSTYLE_SOLID);
	484	wxColour blackClr(0, 0, 0);
	485	wxColour whiteClr(255, 255, 255);
	486	wxPen blackPen(blackClr, 1, wxPENSTYLE_SOLID);
	487	wxPen whitePen(whiteClr, 1, wxPENSTYLE_SOLID);
	488
	489	if ( edge == wxSASH_LEFT \|\| edge == wxSASH_RIGHT )
	490	{
	491	int sashPosition = (edge == wxSASH_LEFT) ? 0 : ( w - GetEdgeMargin(edge) );
	492
	493	dc.SetPen(facePen);
	494	dc.SetBrush(faceBrush);
	495	dc.DrawRectangle(sashPosition, 0, GetEdgeMargin(edge), h);
	496
	497	if (GetWindowStyleFlag() & wxSW_3DSASH)
	498	{
	499	if (edge == wxSASH_LEFT)
	500	{
	501	// Draw a dark grey line on the left to indicate that the
	502	// sash is raised
	503	dc.SetPen(mediumShadowPen);
	504	dc.DrawLine(GetEdgeMargin(edge), 0, GetEdgeMargin(edge), h);
	505	}
	506	else
	507	{
	508	// Draw a highlight line on the right to indicate that the
	509	// sash is raised
	510	dc.SetPen(hilightPen);
	511	dc.DrawLine(w - GetEdgeMargin(edge), 0, w - GetEdgeMargin(edge), h);
	512	}
	513	}
	514	}
	515	else // top or bottom
	516	{
	517	int sashPosition = (edge == wxSASH_TOP) ? 0 : ( h - GetEdgeMargin(edge) );
	518
	519	dc.SetPen(facePen);
	520	dc.SetBrush(faceBrush);
	521	dc.DrawRectangle(0, sashPosition, w, GetEdgeMargin(edge));
	522
	523	if (GetWindowStyleFlag() & wxSW_3DSASH)
	524	{
	525	if (edge == wxSASH_BOTTOM)
	526	{
	527	// Draw a highlight line on the bottom to indicate that the
	528	// sash is raised
	529	dc.SetPen(hilightPen);
	530	dc.DrawLine(0, h - GetEdgeMargin(edge), w, h - GetEdgeMargin(edge));
	531	}
	532	else
	533	{
	534	// Draw a drak grey line on the top to indicate that the
	535	// sash is raised
	536	dc.SetPen(mediumShadowPen);
	537	dc.DrawLine(1, GetEdgeMargin(edge), w-1, GetEdgeMargin(edge));
	538	}
	539	}
	540	}
	541
	542	dc.SetPen(wxNullPen);
	543	dc.SetBrush(wxNullBrush);
	544	}
	545
	546	// Draw the sash tracker (for whilst moving the sash)
	547	void wxSashWindow::DrawSashTracker(wxSashEdgePosition edge, int x, int y)
	548	{
	549	int w, h;
	550	GetClientSize(&w, &h);
	551
	552	wxScreenDC screenDC;
	553	int x1, y1;
	554	int x2, y2;
	555
	556	if ( edge == wxSASH_LEFT \|\| edge == wxSASH_RIGHT )
	557	{
	558	x1 = x; y1 = 2;
	559	x2 = x; y2 = h-2;
	560
	561	if ( (edge == wxSASH_LEFT) && (x1 > w) )
	562	{
	563	x1 = w; x2 = w;
	564	}
	565	else if ( (edge == wxSASH_RIGHT) && (x1 < 0) )
	566	{
	567	x1 = 0; x2 = 0;
	568	}
	569	}
	570	else
	571	{
	572	x1 = 2; y1 = y;
	573	x2 = w-2; y2 = y;
	574
	575	if ( (edge == wxSASH_TOP) && (y1 > h) )
	576	{
	577	y1 = h;
	578	y2 = h;
	579	}
	580	else if ( (edge == wxSASH_BOTTOM) && (y1 < 0) )
	581	{
	582	y1 = 0;
	583	y2 = 0;
	584	}
	585	}
	586
	587	ClientToScreen(&x1, &y1);
	588	ClientToScreen(&x2, &y2);
	589
	590	wxPen sashTrackerPen(*wxBLACK, 2, wxPENSTYLE_SOLID);
	591
	592	screenDC.SetLogicalFunction(wxINVERT);
	593	screenDC.SetPen(sashTrackerPen);
	594	screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
	595
	596	screenDC.DrawLine(x1, y1, x2, y2);
	597
	598	screenDC.SetLogicalFunction(wxCOPY);
	599
	600	screenDC.SetPen(wxNullPen);
	601	screenDC.SetBrush(wxNullBrush);
	602	}
	603
	604	// Position and size subwindows.
	605	// Note that the border size applies to each subwindow, not
	606	// including the edges next to the sash.
	607	void wxSashWindow::SizeWindows()
	608	{
	609	int cw, ch;
	610	GetClientSize(&cw, &ch);
	611
	612	if (GetChildren().GetCount() == 1)
	613	{
	614	wxWindow* child = GetChildren().GetFirst()->GetData();
	615
	616	int x = 0;
	617	int y = 0;
	618	int width = cw;
	619	int height = ch;
	620
	621	// Top
	622	if (m_sashes[0].m_show)
	623	{
	624	y = m_borderSize;
	625	height -= m_borderSize;
	626	}
	627	y += m_extraBorderSize;
	628
	629	// Left
	630	if (m_sashes[3].m_show)
	631	{
	632	x = m_borderSize;
	633	width -= m_borderSize;
	634	}
	635	x += m_extraBorderSize;
	636
	637	// Right
	638	if (m_sashes[1].m_show)
	639	{
	640	width -= m_borderSize;
	641	}
	642	width -= 2*m_extraBorderSize;
	643
	644	// Bottom
	645	if (m_sashes[2].m_show)
	646	{
	647	height -= m_borderSize;
	648	}
	649	height -= 2*m_extraBorderSize;
	650
	651	child->SetSize(x, y, width, height);
	652	}
	653	else if (GetChildren().GetCount() > 1)
	654	{
	655	// Perhaps multiple children are themselves sash windows.
	656	// TODO: this doesn't really work because the subwindows sizes/positions
	657	// must be set to leave a gap for the parent's sash (hit-test and decorations).
	658	// Perhaps we can allow for this within LayoutWindow, testing whether the parent
	659	// is a sash window, and if so, allowing some space for the edges.
	660	wxLayoutAlgorithm layout;
	661	layout.LayoutWindow(this);
	662	}
	663
	664	wxClientDC dc(this);
	665	DrawBorders(dc);
	666	DrawSashes(dc);
	667	}
	668
	669	// Initialize colours
	670	void wxSashWindow::InitColours()
	671	{
	672	// Shadow colours
	673	m_faceColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
	674	m_mediumShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW);
	675	m_darkShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW);
	676	m_lightShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT);
	677	m_hilightColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT);
	678	}
	679
	680	void wxSashWindow::SetSashVisible(wxSashEdgePosition edge, bool sash)
	681	{
	682	m_sashes[edge].m_show = sash;
	683	if (sash)
	684	m_sashes[edge].m_margin = m_borderSize;
	685	else
	686	m_sashes[edge].m_margin = 0;
	687	}
	688
	689	#if defined( __WXMSW__ ) \|\| defined( __WXMAC__)
	690
	691	// this is currently called (and needed) under MSW only...
	692	void wxSashWindow::OnSetCursor(wxSetCursorEvent& event)
	693	{
	694	// if we don't do it, the resizing cursor might be set for child window:
	695	// and like this we explicitly say that our cursor should not be used for
	696	// children windows which overlap us
	697
	698	if ( SashHitTest(event.GetX(), event.GetY()) != wxSASH_NONE)
	699	{
	700	// default processing is ok
	701	event.Skip();
	702	}
	703	//else: do nothing, in particular, don't call Skip()
	704	}
	705
	706	#endif // __WXMSW__ \|\| __WXMAC__
	707
	708	#endif // wxUSE_SASH