src/generic/sashwin.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        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 license
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "sashwin.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

#if wxUSE_SASH

#include <math.h>
#include <stdlib.h>

#include "wx/string.h"
#include "wx/dcscreen.h"
#include "wx/sashwin.h"
#include "wx/laywin.h"

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)
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);

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

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

    //    if ( m_borderSize > 0 )
    DrawBorders(dc);

    DrawSashes(dc);
}

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

    wxSashEdgePosition sashHit = SashHitTest(x, y);

    // reset the cursor
#if defined(__WXMOTIF__) || defined(__WXGTK__)
    SetCursor(* wxSTANDARD_CURSOR);
#endif
#ifdef __WXMSW__
    SetCursor(wxNullCursor);
#endif

    if (event.LeftDown())
    {
        CaptureMouse();

        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 && !parent->IsKindOf(CLASSINFO(wxDialog)) &&
                             !parent->IsKindOf(CLASSINFO(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) )
            {
                SetCursor(*m_sashCursorWE);
            }
            else
            {
                SetCursor(*m_sashCursorNS);
            }
        }
    }
    else if ( event.LeftUp() && m_dragMode == wxSASH_DRAG_LEFT_DOWN )
    {
        // Wasn't a proper drag
        ReleaseMouse();
        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;
        ReleaseMouse();
        // 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 = -1,
            newWidth = -1;

        // 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 == -1 )
        {
            // 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 == -1 )
        {
            // 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 event(GetId(), edge);
        event.SetEventObject(this);
        event.SetDragStatus(status);
        event.SetDragRect(dragRect);
        GetEventHandler()->ProcessEvent(event);
    }
    else if ( event.LeftUp() )
    {
        ReleaseMouse();
    }
    else if (event.Moving() && !event.Dragging())
    {
        // Just change the cursor if required
        if ( sashHit != wxSASH_NONE )
        {
            if ( (sashHit == wxSASH_LEFT) || (sashHit == wxSASH_RIGHT) )
            {
                SetCursor(*m_sashCursorWE);
            }
            else
            {
                SetCursor(*m_sashCursorNS);
            }
        }
        else
        {
            SetCursor(wxNullCursor);
        }
    }
    else if ( event.Dragging() &&
              ((m_dragMode == wxSASH_DRAG_DRAGGING) ||
               (m_dragMode == wxSASH_DRAG_LEFT_DOWN)) )
    {
        if ( (m_draggingEdge == wxSASH_LEFT) || (m_draggingEdge == wxSASH_RIGHT) )
        {
            SetCursor(*m_sashCursorWE);
        }
        else
        {
            SetCursor(*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, wxSOLID);
    wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
    wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
    wxPen hilightPen(m_hilightColour, 1, wxSOLID);

    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, wxSOLID);
    wxBrush faceBrush(m_faceColour, wxSOLID);
    wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
    wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
    wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
    wxPen hilightPen(m_hilightColour, 1, wxSOLID);
    wxPen blackPen(wxColour(0, 0, 0), 1, wxSOLID);
    wxPen whitePen(wxColour(255, 255, 255), 1, wxSOLID);

    if ( edge == wxSASH_LEFT || edge == wxSASH_RIGHT )
    {
        int sashPosition = 0;
        if (edge == wxSASH_LEFT)
            sashPosition = 0;
        else
            sashPosition = 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 = 0;
        if (edge == wxSASH_TOP)
            sashPosition = 0;
        else
            sashPosition = 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, wxSOLID);

    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().Number() == 1)
    {
        wxWindow* child = (wxWindow*) (GetChildren().First()->Data());

        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().Number() > 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
#if defined(__WIN95__)
    m_faceColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
    m_mediumShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW);
    m_darkShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW);
    m_lightShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT);
    m_hilightColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT);
#else
    m_faceColour = *(wxTheColourDatabase->FindColour("LIGHT GREY"));
    m_mediumShadowColour = *(wxTheColourDatabase->FindColour("GREY"));
    m_darkShadowColour = *(wxTheColourDatabase->FindColour("BLACK"));
    m_lightShadowColour = *(wxTheColourDatabase->FindColour("LIGHT GREY"));
    m_hilightColour = *(wxTheColourDatabase->FindColour("WHITE"));
#endif
}

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;
}

#endif // wxUSE_SASH
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: 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 license
	12	/////////////////////////////////////////////////////////////////////////////
	13
	14	#ifdef __GNUG__
	15	#pragma implementation "sashwin.h"
	16	#endif
	17
	18	// For compilers that support precompilation, includes "wx.h".
	19	#include "wx/wxprec.h"
	20
	21	#ifdef __BORLANDC__
	22	#pragma hdrstop
	23	#endif
	24
	25	#ifndef WX_PRECOMP
	26	#include "wx/wx.h"
	27	#endif
	28
	29	#if wxUSE_SASH
	30
	31	#include <math.h>
	32	#include <stdlib.h>
	33
	34	#include "wx/string.h"
	35	#include "wx/dcscreen.h"
	36	#include "wx/sashwin.h"
	37	#include "wx/laywin.h"
	38
	39	IMPLEMENT_DYNAMIC_CLASS(wxSashWindow, wxWindow)
	40	IMPLEMENT_DYNAMIC_CLASS(wxSashEvent, wxCommandEvent)
	41
	42	BEGIN_EVENT_TABLE(wxSashWindow, wxWindow)
	43	EVT_PAINT(wxSashWindow::OnPaint)
	44	EVT_SIZE(wxSashWindow::OnSize)
	45	EVT_MOUSE_EVENTS(wxSashWindow::OnMouseEvent)
	46	END_EVENT_TABLE()
	47
	48	bool wxSashWindow::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos,
	49	const wxSize& size, long style, const wxString& name)
	50	{
	51	return wxWindow::Create(parent, id, pos, size, style, name);
	52	}
	53
	54	wxSashWindow::~wxSashWindow()
	55	{
	56	delete m_sashCursorWE;
	57	delete m_sashCursorNS;
	58	}
	59
	60	void wxSashWindow::Init()
	61	{
	62	m_draggingEdge = wxSASH_NONE;
	63	m_dragMode = wxSASH_DRAG_NONE;
	64	m_oldX = 0;
	65	m_oldY = 0;
	66	m_firstX = 0;
	67	m_firstY = 0;
	68	m_borderSize = 3;
	69	m_extraBorderSize = 0;
	70	m_minimumPaneSizeX = 0;
	71	m_minimumPaneSizeY = 0;
	72	m_maximumPaneSizeX = 10000;
	73	m_maximumPaneSizeY = 10000;
	74	m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
	75	m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
	76
	77	// Eventually, we'll respond to colour change messages
	78	InitColours();
	79	}
	80
	81	void wxSashWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
	82	{
	83	wxPaintDC dc(this);
	84
	85	// if ( m_borderSize > 0 )
	86	DrawBorders(dc);
	87
	88	DrawSashes(dc);
	89	}
	90
	91	void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
	92	{
	93	wxCoord x, y;
	94	event.GetPosition(&x, &y);
	95
	96	wxSashEdgePosition sashHit = SashHitTest(x, y);
	97
	98	// reset the cursor
	99	#if defined(__WXMOTIF__) \|\| defined(__WXGTK__)
	100	SetCursor(* wxSTANDARD_CURSOR);
	101	#endif
	102	#ifdef __WXMSW__
	103	SetCursor(wxNullCursor);
	104	#endif
	105
	106	if (event.LeftDown())
	107	{
	108	CaptureMouse();
	109
	110	if ( sashHit != wxSASH_NONE )
	111	{
	112	// Required for X to specify that
	113	// that we wish to draw on top of all windows
	114	// - and we optimise by specifying the area
	115	// for creating the overlap window.
	116	// Find the first frame or dialog and use this to specify
	117	// the area to draw on.
	118	wxWindow* parent = this;
	119
	120	while (parent && !parent->IsKindOf(CLASSINFO(wxDialog)) &&
	121	!parent->IsKindOf(CLASSINFO(wxFrame)))
	122	parent = parent->GetParent();
	123
	124	wxScreenDC::StartDrawingOnTop(parent);
	125
	126	// We don't say we're dragging yet; we leave that
	127	// decision for the Dragging() branch, to ensure
	128	// the user has dragged a little bit.
	129	m_dragMode = wxSASH_DRAG_LEFT_DOWN;
	130	m_draggingEdge = sashHit;
	131	m_firstX = x;
	132	m_firstY = y;
	133
	134	if ( (sashHit == wxSASH_LEFT) \|\| (sashHit == wxSASH_RIGHT) )
	135	{
	136	SetCursor(*m_sashCursorWE);
	137	}
	138	else
	139	{
	140	SetCursor(*m_sashCursorNS);
	141	}
	142	}
	143	}
	144	else if ( event.LeftUp() && m_dragMode == wxSASH_DRAG_LEFT_DOWN )
	145	{
	146	// Wasn't a proper drag
	147	ReleaseMouse();
	148	wxScreenDC::EndDrawingOnTop();
	149	m_dragMode = wxSASH_DRAG_NONE;
	150	m_draggingEdge = wxSASH_NONE;
	151	}
	152	else if (event.LeftUp() && m_dragMode == wxSASH_DRAG_DRAGGING)
	153	{
	154	// We can stop dragging now and see what we've got.
	155	m_dragMode = wxSASH_DRAG_NONE;
	156	ReleaseMouse();
	157	// Erase old tracker
	158	DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
	159
	160	// End drawing on top (frees the window used for drawing
	161	// over the screen)
	162	wxScreenDC::EndDrawingOnTop();
	163
	164	int w, h;
	165	GetSize(&w, &h);
	166	int xp, yp;
	167	GetPosition(&xp, &yp);
	168
	169	wxSashEdgePosition edge = m_draggingEdge;
	170	m_draggingEdge = wxSASH_NONE;
	171
	172	wxRect dragRect;
	173	wxSashDragStatus status = wxSASH_STATUS_OK;
	174
	175	// the new height and width of the window - if -1, it didn't change
	176	int newHeight = -1,
	177	newWidth = -1;
	178
	179	// NB: x and y may be negative and they're relative to the sash window
	180	// upper left corner, while xp and yp are expressed in the parent
	181	// window system of coordinates, so adjust them! After this
	182	// adjustment, all coordinates are relative to the parent window.
	183	y += yp;
	184	x += xp;
	185
	186	switch (edge)
	187	{
	188	case wxSASH_TOP:
	189	if ( y > yp + h )
	190	{
	191	// top sash shouldn't get below the bottom one
	192	status = wxSASH_STATUS_OUT_OF_RANGE;
	193	}
	194	else
	195	{
	196	newHeight = h - (y - yp);
	197	}
	198	break;
	199
	200	case wxSASH_BOTTOM:
	201	if ( y < yp )
	202	{
	203	// bottom sash shouldn't get above the top one
	204	status = wxSASH_STATUS_OUT_OF_RANGE;
	205	}
	206	else
	207	{
	208	newHeight = y - yp;
	209	}
	210	break;
	211
	212	case wxSASH_LEFT:
	213	if ( x > xp + w )
	214	{
	215	// left sash shouldn't get beyond the right one
	216	status = wxSASH_STATUS_OUT_OF_RANGE;
	217	}
	218	else
	219	{
	220	newWidth = w - (x - xp);
	221	}
	222	break;
	223
	224	case wxSASH_RIGHT:
	225	if ( x < xp )
	226	{
	227	// and the right sash, finally, shouldn't be beyond the
	228	// left one
	229	status = wxSASH_STATUS_OUT_OF_RANGE;
	230	}
	231	else
	232	{
	233	newWidth = x - xp;
	234	}
	235	break;
	236
	237	case wxSASH_NONE:
	238	// can this happen at all?
	239	break;
	240	}
	241
	242	if ( newHeight == -1 )
	243	{
	244	// didn't change
	245	newHeight = h;
	246	}
	247	else
	248	{
	249	// make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
	250	newHeight = wxMax(newHeight, m_minimumPaneSizeY);
	251	newHeight = wxMin(newHeight, m_maximumPaneSizeY);
	252	}
	253
	254	if ( newWidth == -1 )
	255	{
	256	// didn't change
	257	newWidth = w;
	258	}
	259	else
	260	{
	261	// make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
	262	newWidth = wxMax(newWidth, m_minimumPaneSizeX);
	263	newWidth = wxMin(newWidth, m_maximumPaneSizeX);
	264	}
	265
	266	dragRect = wxRect(x, y, newWidth, newHeight);
	267
	268	wxSashEvent event(GetId(), edge);
	269	event.SetEventObject(this);
	270	event.SetDragStatus(status);
	271	event.SetDragRect(dragRect);
	272	GetEventHandler()->ProcessEvent(event);
	273	}
	274	else if ( event.LeftUp() )
	275	{
	276	ReleaseMouse();
	277	}
	278	else if (event.Moving() && !event.Dragging())
	279	{
	280	// Just change the cursor if required
	281	if ( sashHit != wxSASH_NONE )
	282	{
	283	if ( (sashHit == wxSASH_LEFT) \|\| (sashHit == wxSASH_RIGHT) )
	284	{
	285	SetCursor(*m_sashCursorWE);
	286	}
	287	else
	288	{
	289	SetCursor(*m_sashCursorNS);
	290	}
	291	}
	292	else
	293	{
	294	SetCursor(wxNullCursor);
	295	}
	296	}
	297	else if ( event.Dragging() &&
	298	((m_dragMode == wxSASH_DRAG_DRAGGING) \|\|
	299	(m_dragMode == wxSASH_DRAG_LEFT_DOWN)) )
	300	{
	301	if ( (m_draggingEdge == wxSASH_LEFT) \|\| (m_draggingEdge == wxSASH_RIGHT) )
	302	{
	303	SetCursor(*m_sashCursorWE);
	304	}
	305	else
	306	{
	307	SetCursor(*m_sashCursorNS);
	308	}
	309
	310	if (m_dragMode == wxSASH_DRAG_LEFT_DOWN)
	311	{
	312	m_dragMode = wxSASH_DRAG_DRAGGING;
	313	DrawSashTracker(m_draggingEdge, x, y);
	314	}
	315	else
	316	{
	317	if ( m_dragMode == wxSASH_DRAG_DRAGGING )
	318	{
	319	// Erase old tracker
	320	DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
	321
	322	// Draw new one
	323	DrawSashTracker(m_draggingEdge, x, y);
	324	}
	325	}
	326	m_oldX = x;
	327	m_oldY = y;
	328	}
	329	else if ( event.LeftDClick() )
	330	{
	331	// Nothing
	332	}
	333	else
	334	{
	335	}
	336	}
	337
	338	void wxSashWindow::OnSize(wxSizeEvent& WXUNUSED(event))
	339	{
	340	SizeWindows();
	341	}
	342
	343	wxSashEdgePosition wxSashWindow::SashHitTest(int x, int y, int WXUNUSED(tolerance))
	344	{
	345	int cx, cy;
	346	GetClientSize(& cx, & cy);
	347
	348	int i;
	349	for (i = 0; i < 4; i++)
	350	{
	351	wxSashEdge& edge = m_sashes[i];
	352	wxSashEdgePosition position = (wxSashEdgePosition) i ;
	353
	354	if (edge.m_show)
	355	{
	356	switch (position)
	357	{
	358	case wxSASH_TOP:
	359	{
	360	if (y >= 0 && y <= GetEdgeMargin(position))
	361	return wxSASH_TOP;
	362	break;
	363	}
	364	case wxSASH_RIGHT:
	365	{
	366	if ((x >= cx - GetEdgeMargin(position)) && (x <= cx))
	367	return wxSASH_RIGHT;
	368	break;
	369	}
	370	case wxSASH_BOTTOM:
	371	{
	372	if ((y >= cy - GetEdgeMargin(position)) && (y <= cy))
	373	return wxSASH_BOTTOM;
	374	break;
	375	}
	376	case wxSASH_LEFT:
	377	{
	378	if ((x <= GetEdgeMargin(position)) && (x >= 0))
	379	return wxSASH_LEFT;
	380	break;
	381	}
	382	case wxSASH_NONE:
	383	{
	384	break;
	385	}
	386	}
	387	}
	388	}
	389	return wxSASH_NONE;
	390	}
	391
	392	// Draw 3D effect borders
	393	void wxSashWindow::DrawBorders(wxDC& dc)
	394	{
	395	int w, h;
	396	GetClientSize(&w, &h);
	397
	398	wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
	399	wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
	400	wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
	401	wxPen hilightPen(m_hilightColour, 1, wxSOLID);
	402
	403	if ( GetWindowStyleFlag() & wxSW_3DBORDER )
	404	{
	405	dc.SetPen(mediumShadowPen);
	406	dc.DrawLine(0, 0, w-1, 0);
	407	dc.DrawLine(0, 0, 0, h - 1);
	408
	409	dc.SetPen(darkShadowPen);
	410	dc.DrawLine(1, 1, w-2, 1);
	411	dc.DrawLine(1, 1, 1, h-2);
	412
	413	dc.SetPen(hilightPen);
	414	dc.DrawLine(0, h-1, w-1, h-1);
	415	dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
	416	/// Anyway, h is required for MSW.
	417
	418	dc.SetPen(lightShadowPen);
	419	dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
	420	dc.DrawLine(1, h-2, w-1, h-2); // Bottom
	421	}
	422	else if ( GetWindowStyleFlag() & wxSW_BORDER )
	423	{
	424	dc.SetBrush(*wxTRANSPARENT_BRUSH);
	425	dc.SetPen(*wxBLACK_PEN);
	426	dc.DrawRectangle(0, 0, w-1, h-1);
	427	}
	428
	429	dc.SetPen(wxNullPen);
	430	dc.SetBrush(wxNullBrush);
	431	}
	432
	433	void wxSashWindow::DrawSashes(wxDC& dc)
	434	{
	435	int i;
	436	for (i = 0; i < 4; i++)
	437	if (m_sashes[i].m_show)
	438	DrawSash((wxSashEdgePosition) i, dc);
	439	}
	440
	441	// Draw the sash
	442	void wxSashWindow::DrawSash(wxSashEdgePosition edge, wxDC& dc)
	443	{
	444	int w, h;
	445	GetClientSize(&w, &h);
	446
	447	wxPen facePen(m_faceColour, 1, wxSOLID);
	448	wxBrush faceBrush(m_faceColour, wxSOLID);
	449	wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
	450	wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
	451	wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
	452	wxPen hilightPen(m_hilightColour, 1, wxSOLID);
	453	wxPen blackPen(wxColour(0, 0, 0), 1, wxSOLID);
	454	wxPen whitePen(wxColour(255, 255, 255), 1, wxSOLID);
	455
	456	if ( edge == wxSASH_LEFT \|\| edge == wxSASH_RIGHT )
	457	{
	458	int sashPosition = 0;
	459	if (edge == wxSASH_LEFT)
	460	sashPosition = 0;
	461	else
	462	sashPosition = w - GetEdgeMargin(edge);
	463
	464	dc.SetPen(facePen);
	465	dc.SetBrush(faceBrush);
	466	dc.DrawRectangle(sashPosition, 0, GetEdgeMargin(edge), h);
	467
	468	if (GetWindowStyleFlag() & wxSW_3DSASH)
	469	{
	470	if (edge == wxSASH_LEFT)
	471	{
	472	// Draw a dark grey line on the left to indicate that the
	473	// sash is raised
	474	dc.SetPen(mediumShadowPen);
	475	dc.DrawLine(GetEdgeMargin(edge), 0, GetEdgeMargin(edge), h);
	476	}
	477	else
	478	{
	479	// Draw a highlight line on the right to indicate that the
	480	// sash is raised
	481	dc.SetPen(hilightPen);
	482	dc.DrawLine(w - GetEdgeMargin(edge), 0, w - GetEdgeMargin(edge), h);
	483	}
	484	}
	485	}
	486	else // top or bottom
	487	{
	488	int sashPosition = 0;
	489	if (edge == wxSASH_TOP)
	490	sashPosition = 0;
	491	else
	492	sashPosition = h - GetEdgeMargin(edge);
	493
	494	dc.SetPen(facePen);
	495	dc.SetBrush(faceBrush);
	496	dc.DrawRectangle(0, sashPosition, w, GetEdgeMargin(edge));
	497
	498	if (GetWindowStyleFlag() & wxSW_3DSASH)
	499	{
	500	if (edge == wxSASH_BOTTOM)
	501	{
	502	// Draw a highlight line on the bottom to indicate that the
	503	// sash is raised
	504	dc.SetPen(hilightPen);
	505	dc.DrawLine(0, h - GetEdgeMargin(edge), w, h - GetEdgeMargin(edge));
	506	}
	507	else
	508	{
	509	// Draw a drak grey line on the top to indicate that the
	510	// sash is raised
	511	dc.SetPen(mediumShadowPen);
	512	dc.DrawLine(1, GetEdgeMargin(edge), w-1, GetEdgeMargin(edge));
	513	}
	514	}
	515	}
	516
	517	dc.SetPen(wxNullPen);
	518	dc.SetBrush(wxNullBrush);
	519	}
	520
	521	// Draw the sash tracker (for whilst moving the sash)
	522	void wxSashWindow::DrawSashTracker(wxSashEdgePosition edge, int x, int y)
	523	{
	524	int w, h;
	525	GetClientSize(&w, &h);
	526
	527	wxScreenDC screenDC;
	528	int x1, y1;
	529	int x2, y2;
	530
	531	if ( edge == wxSASH_LEFT \|\| edge == wxSASH_RIGHT )
	532	{
	533	x1 = x; y1 = 2;
	534	x2 = x; y2 = h-2;
	535
	536	if ( (edge == wxSASH_LEFT) && (x1 > w) )
	537	{
	538	x1 = w; x2 = w;
	539	}
	540	else if ( (edge == wxSASH_RIGHT) && (x1 < 0) )
	541	{
	542	x1 = 0; x2 = 0;
	543	}
	544	}
	545	else
	546	{
	547	x1 = 2; y1 = y;
	548	x2 = w-2; y2 = y;
	549
	550	if ( (edge == wxSASH_TOP) && (y1 > h) )
	551	{
	552	y1 = h;
	553	y2 = h;
	554	}
	555	else if ( (edge == wxSASH_BOTTOM) && (y1 < 0) )
	556	{
	557	y1 = 0;
	558	y2 = 0;
	559	}
	560	}
	561
	562	ClientToScreen(&x1, &y1);
	563	ClientToScreen(&x2, &y2);
	564
	565	wxPen sashTrackerPen(*wxBLACK, 2, wxSOLID);
	566
	567	screenDC.SetLogicalFunction(wxINVERT);
	568	screenDC.SetPen(sashTrackerPen);
	569	screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
	570
	571	screenDC.DrawLine(x1, y1, x2, y2);
	572
	573	screenDC.SetLogicalFunction(wxCOPY);
	574
	575	screenDC.SetPen(wxNullPen);
	576	screenDC.SetBrush(wxNullBrush);
	577	}
	578
	579	// Position and size subwindows.
	580	// Note that the border size applies to each subwindow, not
	581	// including the edges next to the sash.
	582	void wxSashWindow::SizeWindows()
	583	{
	584	int cw, ch;
	585	GetClientSize(&cw, &ch);
	586
	587	if (GetChildren().Number() == 1)
	588	{
	589	wxWindow* child = (wxWindow*) (GetChildren().First()->Data());
	590
	591	int x = 0;
	592	int y = 0;
	593	int width = cw;
	594	int height = ch;
	595
	596	// Top
	597	if (m_sashes[0].m_show)
	598	{
	599	y = m_borderSize;
	600	height -= m_borderSize;
	601	}
	602	y += m_extraBorderSize;
	603
	604	// Left
	605	if (m_sashes[3].m_show)
	606	{
	607	x = m_borderSize;
	608	width -= m_borderSize;
	609	}
	610	x += m_extraBorderSize;
	611
	612	// Right
	613	if (m_sashes[1].m_show)
	614	{
	615	width -= m_borderSize;
	616	}
	617	width -= 2*m_extraBorderSize;
	618
	619	// Bottom
	620	if (m_sashes[2].m_show)
	621	{
	622	height -= m_borderSize;
	623	}
	624	height -= 2*m_extraBorderSize;
	625
	626	child->SetSize(x, y, width, height);
	627	}
	628	else if (GetChildren().Number() > 1)
	629	{
	630	// Perhaps multiple children are themselves sash windows.
	631	// TODO: this doesn't really work because the subwindows sizes/positions
	632	// must be set to leave a gap for the parent's sash (hit-test and decorations).
	633	// Perhaps we can allow for this within LayoutWindow, testing whether the parent
	634	// is a sash window, and if so, allowing some space for the edges.
	635	wxLayoutAlgorithm layout;
	636	layout.LayoutWindow(this);
	637	}
	638
	639	wxClientDC dc(this);
	640	DrawBorders(dc);
	641	DrawSashes(dc);
	642	}
	643
	644	// Initialize colours
	645	void wxSashWindow::InitColours()
	646	{
	647	// Shadow colours
	648	#if defined(__WIN95__)
	649	m_faceColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
	650	m_mediumShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW);
	651	m_darkShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW);
	652	m_lightShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT);
	653	m_hilightColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT);
	654	#else
	655	m_faceColour = *(wxTheColourDatabase->FindColour("LIGHT GREY"));
	656	m_mediumShadowColour = *(wxTheColourDatabase->FindColour("GREY"));
	657	m_darkShadowColour = *(wxTheColourDatabase->FindColour("BLACK"));
	658	m_lightShadowColour = *(wxTheColourDatabase->FindColour("LIGHT GREY"));
	659	m_hilightColour = *(wxTheColourDatabase->FindColour("WHITE"));
	660	#endif
	661	}
	662
	663	void wxSashWindow::SetSashVisible(wxSashEdgePosition edge, bool sash)
	664	{
	665	m_sashes[edge].m_show = sash;
	666	if (sash)
	667	m_sashes[edge].m_margin = m_borderSize;
	668	else
	669	m_sashes[edge].m_margin = 0;
	670	}
	671
	672	#endif // wxUSE_SASH