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

#if wxUSE_SASH

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

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

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

DEFINE_EVENT_TYPE(wxEVT_SASH_DRAGGED)

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);
    m_mouseCaptured = FALSE;

    // 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__)
    // Not necessary and in fact inhibits proper cursor setting (JACS 8/2000)
    //SetCursor(* wxSTANDARD_CURSOR);
#endif
#ifdef __WXMSW__
    SetCursor(wxNullCursor);
#endif

    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 && !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
        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 = -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() )
    {
        if (m_mouseCaptured)
           ReleaseMouse();
        m_mouseCaptured = FALSE;
    }
    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
#ifndef __WIN16__
    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	#if wxUSE_SASH
	26
	27	#ifndef WX_PRECOMP
	28	#include "wx/dialog.h"
	29	#include "wx/frame.h"
	30	#include "wx/settings.h"
	31	#endif
	32
	33	#include <math.h>
	34	#include <stdlib.h>
	35
	36	#include "wx/dcscreen.h"
	37	#include "wx/sashwin.h"
	38	#include "wx/laywin.h"
	39
	40	DEFINE_EVENT_TYPE(wxEVT_SASH_DRAGGED)
	41
	42	IMPLEMENT_DYNAMIC_CLASS(wxSashWindow, wxWindow)
	43	IMPLEMENT_DYNAMIC_CLASS(wxSashEvent, wxCommandEvent)
	44
	45	BEGIN_EVENT_TABLE(wxSashWindow, wxWindow)
	46	EVT_PAINT(wxSashWindow::OnPaint)
	47	EVT_SIZE(wxSashWindow::OnSize)
	48	EVT_MOUSE_EVENTS(wxSashWindow::OnMouseEvent)
	49	END_EVENT_TABLE()
	50
	51	bool wxSashWindow::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos,
	52	const wxSize& size, long style, const wxString& name)
	53	{
	54	return wxWindow::Create(parent, id, pos, size, style, name);
	55	}
	56
	57	wxSashWindow::~wxSashWindow()
	58	{
	59	delete m_sashCursorWE;
	60	delete m_sashCursorNS;
	61	}
	62
	63	void wxSashWindow::Init()
	64	{
	65	m_draggingEdge = wxSASH_NONE;
	66	m_dragMode = wxSASH_DRAG_NONE;
	67	m_oldX = 0;
	68	m_oldY = 0;
	69	m_firstX = 0;
	70	m_firstY = 0;
	71	m_borderSize = 3;
	72	m_extraBorderSize = 0;
	73	m_minimumPaneSizeX = 0;
	74	m_minimumPaneSizeY = 0;
	75	m_maximumPaneSizeX = 10000;
	76	m_maximumPaneSizeY = 10000;
	77	m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
	78	m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
	79	m_mouseCaptured = FALSE;
	80
	81	// Eventually, we'll respond to colour change messages
	82	InitColours();
	83	}
	84
	85	void wxSashWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
	86	{
	87	wxPaintDC dc(this);
	88
	89	// if ( m_borderSize > 0 )
	90	DrawBorders(dc);
	91
	92	DrawSashes(dc);
	93	}
	94
	95	void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
	96	{
	97	wxCoord x, y;
	98	event.GetPosition(&x, &y);
	99
	100	wxSashEdgePosition sashHit = SashHitTest(x, y);
	101
	102	// reset the cursor
	103	#if defined(__WXMOTIF__) \|\| defined(__WXGTK__)
	104	// Not necessary and in fact inhibits proper cursor setting (JACS 8/2000)
	105	//SetCursor(* wxSTANDARD_CURSOR);
	106	#endif
	107	#ifdef __WXMSW__
	108	SetCursor(wxNullCursor);
	109	#endif
	110
	111	if (event.LeftDown())
	112	{
	113	CaptureMouse();
	114	m_mouseCaptured = TRUE;
	115
	116	if ( sashHit != wxSASH_NONE )
	117	{
	118	// Required for X to specify that
	119	// that we wish to draw on top of all windows
	120	// - and we optimise by specifying the area
	121	// for creating the overlap window.
	122	// Find the first frame or dialog and use this to specify
	123	// the area to draw on.
	124	wxWindow* parent = this;
	125
	126	while (parent && !parent->IsKindOf(CLASSINFO(wxDialog)) &&
	127	!parent->IsKindOf(CLASSINFO(wxFrame)))
	128	parent = parent->GetParent();
	129
	130	wxScreenDC::StartDrawingOnTop(parent);
	131
	132	// We don't say we're dragging yet; we leave that
	133	// decision for the Dragging() branch, to ensure
	134	// the user has dragged a little bit.
	135	m_dragMode = wxSASH_DRAG_LEFT_DOWN;
	136	m_draggingEdge = sashHit;
	137	m_firstX = x;
	138	m_firstY = y;
	139
	140	if ( (sashHit == wxSASH_LEFT) \|\| (sashHit == wxSASH_RIGHT) )
	141	{
	142	SetCursor(*m_sashCursorWE);
	143	}
	144	else
	145	{
	146	SetCursor(*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 = -1,
	189	newWidth = -1;
	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 == -1 )
	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 == -1 )
	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 event(GetId(), edge);
	281	event.SetEventObject(this);
	282	event.SetDragStatus(status);
	283	event.SetDragRect(dragRect);
	284	GetEventHandler()->ProcessEvent(event);
	285	}
	286	else if ( event.LeftUp() )
	287	{
	288	if (m_mouseCaptured)
	289	ReleaseMouse();
	290	m_mouseCaptured = FALSE;
	291	}
	292	else if (event.Moving() && !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	SetCursor(*m_sashCursorWE);
	300	}
	301	else
	302	{
	303	SetCursor(*m_sashCursorNS);
	304	}
	305	}
	306	else
	307	{
	308	SetCursor(wxNullCursor);
	309	}
	310	}
	311	else if ( event.Dragging() &&
	312	((m_dragMode == wxSASH_DRAG_DRAGGING) \|\|
	313	(m_dragMode == wxSASH_DRAG_LEFT_DOWN)) )
	314	{
	315	if ( (m_draggingEdge == wxSASH_LEFT) \|\| (m_draggingEdge == wxSASH_RIGHT) )
	316	{
	317	SetCursor(*m_sashCursorWE);
	318	}
	319	else
	320	{
	321	SetCursor(*m_sashCursorNS);
	322	}
	323
	324	if (m_dragMode == wxSASH_DRAG_LEFT_DOWN)
	325	{
	326	m_dragMode = wxSASH_DRAG_DRAGGING;
	327	DrawSashTracker(m_draggingEdge, x, y);
	328	}
	329	else
	330	{
	331	if ( m_dragMode == wxSASH_DRAG_DRAGGING )
	332	{
	333	// Erase old tracker
	334	DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
	335
	336	// Draw new one
	337	DrawSashTracker(m_draggingEdge, x, y);
	338	}
	339	}
	340	m_oldX = x;
	341	m_oldY = y;
	342	}
	343	else if ( event.LeftDClick() )
	344	{
	345	// Nothing
	346	}
	347	else
	348	{
	349	}
	350	}
	351
	352	void wxSashWindow::OnSize(wxSizeEvent& WXUNUSED(event))
	353	{
	354	SizeWindows();
	355	}
	356
	357	wxSashEdgePosition wxSashWindow::SashHitTest(int x, int y, int WXUNUSED(tolerance))
	358	{
	359	int cx, cy;
	360	GetClientSize(& cx, & cy);
	361
	362	int i;
	363	for (i = 0; i < 4; i++)
	364	{
	365	wxSashEdge& edge = m_sashes[i];
	366	wxSashEdgePosition position = (wxSashEdgePosition) i ;
	367
	368	if (edge.m_show)
	369	{
	370	switch (position)
	371	{
	372	case wxSASH_TOP:
	373	{
	374	if (y >= 0 && y <= GetEdgeMargin(position))
	375	return wxSASH_TOP;
	376	break;
	377	}
	378	case wxSASH_RIGHT:
	379	{
	380	if ((x >= cx - GetEdgeMargin(position)) && (x <= cx))
	381	return wxSASH_RIGHT;
	382	break;
	383	}
	384	case wxSASH_BOTTOM:
	385	{
	386	if ((y >= cy - GetEdgeMargin(position)) && (y <= cy))
	387	return wxSASH_BOTTOM;
	388	break;
	389	}
	390	case wxSASH_LEFT:
	391	{
	392	if ((x <= GetEdgeMargin(position)) && (x >= 0))
	393	return wxSASH_LEFT;
	394	break;
	395	}
	396	case wxSASH_NONE:
	397	{
	398	break;
	399	}
	400	}
	401	}
	402	}
	403	return wxSASH_NONE;
	404	}
	405
	406	// Draw 3D effect borders
	407	void wxSashWindow::DrawBorders(wxDC& dc)
	408	{
	409	int w, h;
	410	GetClientSize(&w, &h);
	411
	412	wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
	413	wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
	414	wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
	415	wxPen hilightPen(m_hilightColour, 1, wxSOLID);
	416
	417	if ( GetWindowStyleFlag() & wxSW_3DBORDER )
	418	{
	419	dc.SetPen(mediumShadowPen);
	420	dc.DrawLine(0, 0, w-1, 0);
	421	dc.DrawLine(0, 0, 0, h - 1);
	422
	423	dc.SetPen(darkShadowPen);
	424	dc.DrawLine(1, 1, w-2, 1);
	425	dc.DrawLine(1, 1, 1, h-2);
	426
	427	dc.SetPen(hilightPen);
	428	dc.DrawLine(0, h-1, w-1, h-1);
	429	dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
	430	/// Anyway, h is required for MSW.
	431
	432	dc.SetPen(lightShadowPen);
	433	dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
	434	dc.DrawLine(1, h-2, w-1, h-2); // Bottom
	435	}
	436	else if ( GetWindowStyleFlag() & wxSW_BORDER )
	437	{
	438	dc.SetBrush(*wxTRANSPARENT_BRUSH);
	439	dc.SetPen(*wxBLACK_PEN);
	440	dc.DrawRectangle(0, 0, w-1, h-1);
	441	}
	442
	443	dc.SetPen(wxNullPen);
	444	dc.SetBrush(wxNullBrush);
	445	}
	446
	447	void wxSashWindow::DrawSashes(wxDC& dc)
	448	{
	449	int i;
	450	for (i = 0; i < 4; i++)
	451	if (m_sashes[i].m_show)
	452	DrawSash((wxSashEdgePosition) i, dc);
	453	}
	454
	455	// Draw the sash
	456	void wxSashWindow::DrawSash(wxSashEdgePosition edge, wxDC& dc)
	457	{
	458	int w, h;
	459	GetClientSize(&w, &h);
	460
	461	wxPen facePen(m_faceColour, 1, wxSOLID);
	462	wxBrush faceBrush(m_faceColour, wxSOLID);
	463	wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
	464	wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
	465	wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
	466	wxPen hilightPen(m_hilightColour, 1, wxSOLID);
	467	wxPen blackPen(wxColour(0, 0, 0), 1, wxSOLID);
	468	wxPen whitePen(wxColour(255, 255, 255), 1, wxSOLID);
	469
	470	if ( edge == wxSASH_LEFT \|\| edge == wxSASH_RIGHT )
	471	{
	472	int sashPosition = 0;
	473	if (edge == wxSASH_LEFT)
	474	sashPosition = 0;
	475	else
	476	sashPosition = w - GetEdgeMargin(edge);
	477
	478	dc.SetPen(facePen);
	479	dc.SetBrush(faceBrush);
	480	dc.DrawRectangle(sashPosition, 0, GetEdgeMargin(edge), h);
	481
	482	if (GetWindowStyleFlag() & wxSW_3DSASH)
	483	{
	484	if (edge == wxSASH_LEFT)
	485	{
	486	// Draw a dark grey line on the left to indicate that the
	487	// sash is raised
	488	dc.SetPen(mediumShadowPen);
	489	dc.DrawLine(GetEdgeMargin(edge), 0, GetEdgeMargin(edge), h);
	490	}
	491	else
	492	{
	493	// Draw a highlight line on the right to indicate that the
	494	// sash is raised
	495	dc.SetPen(hilightPen);
	496	dc.DrawLine(w - GetEdgeMargin(edge), 0, w - GetEdgeMargin(edge), h);
	497	}
	498	}
	499	}
	500	else // top or bottom
	501	{
	502	int sashPosition = 0;
	503	if (edge == wxSASH_TOP)
	504	sashPosition = 0;
	505	else
	506	sashPosition = h - GetEdgeMargin(edge);
	507
	508	dc.SetPen(facePen);
	509	dc.SetBrush(faceBrush);
	510	dc.DrawRectangle(0, sashPosition, w, GetEdgeMargin(edge));
	511
	512	if (GetWindowStyleFlag() & wxSW_3DSASH)
	513	{
	514	if (edge == wxSASH_BOTTOM)
	515	{
	516	// Draw a highlight line on the bottom to indicate that the
	517	// sash is raised
	518	dc.SetPen(hilightPen);
	519	dc.DrawLine(0, h - GetEdgeMargin(edge), w, h - GetEdgeMargin(edge));
	520	}
	521	else
	522	{
	523	// Draw a drak grey line on the top to indicate that the
	524	// sash is raised
	525	dc.SetPen(mediumShadowPen);
	526	dc.DrawLine(1, GetEdgeMargin(edge), w-1, GetEdgeMargin(edge));
	527	}
	528	}
	529	}
	530
	531	dc.SetPen(wxNullPen);
	532	dc.SetBrush(wxNullBrush);
	533	}
	534
	535	// Draw the sash tracker (for whilst moving the sash)
	536	void wxSashWindow::DrawSashTracker(wxSashEdgePosition edge, int x, int y)
	537	{
	538	int w, h;
	539	GetClientSize(&w, &h);
	540
	541	wxScreenDC screenDC;
	542	int x1, y1;
	543	int x2, y2;
	544
	545	if ( edge == wxSASH_LEFT \|\| edge == wxSASH_RIGHT )
	546	{
	547	x1 = x; y1 = 2;
	548	x2 = x; y2 = h-2;
	549
	550	if ( (edge == wxSASH_LEFT) && (x1 > w) )
	551	{
	552	x1 = w; x2 = w;
	553	}
	554	else if ( (edge == wxSASH_RIGHT) && (x1 < 0) )
	555	{
	556	x1 = 0; x2 = 0;
	557	}
	558	}
	559	else
	560	{
	561	x1 = 2; y1 = y;
	562	x2 = w-2; y2 = y;
	563
	564	if ( (edge == wxSASH_TOP) && (y1 > h) )
	565	{
	566	y1 = h;
	567	y2 = h;
	568	}
	569	else if ( (edge == wxSASH_BOTTOM) && (y1 < 0) )
	570	{
	571	y1 = 0;
	572	y2 = 0;
	573	}
	574	}
	575
	576	ClientToScreen(&x1, &y1);
	577	ClientToScreen(&x2, &y2);
	578
	579	wxPen sashTrackerPen(*wxBLACK, 2, wxSOLID);
	580
	581	screenDC.SetLogicalFunction(wxINVERT);
	582	screenDC.SetPen(sashTrackerPen);
	583	screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
	584
	585	screenDC.DrawLine(x1, y1, x2, y2);
	586
	587	screenDC.SetLogicalFunction(wxCOPY);
	588
	589	screenDC.SetPen(wxNullPen);
	590	screenDC.SetBrush(wxNullBrush);
	591	}
	592
	593	// Position and size subwindows.
	594	// Note that the border size applies to each subwindow, not
	595	// including the edges next to the sash.
	596	void wxSashWindow::SizeWindows()
	597	{
	598	int cw, ch;
	599	GetClientSize(&cw, &ch);
	600
	601	if (GetChildren().Number() == 1)
	602	{
	603	wxWindow* child = (wxWindow*) (GetChildren().First()->Data());
	604
	605	int x = 0;
	606	int y = 0;
	607	int width = cw;
	608	int height = ch;
	609
	610	// Top
	611	if (m_sashes[0].m_show)
	612	{
	613	y = m_borderSize;
	614	height -= m_borderSize;
	615	}
	616	y += m_extraBorderSize;
	617
	618	// Left
	619	if (m_sashes[3].m_show)
	620	{
	621	x = m_borderSize;
	622	width -= m_borderSize;
	623	}
	624	x += m_extraBorderSize;
	625
	626	// Right
	627	if (m_sashes[1].m_show)
	628	{
	629	width -= m_borderSize;
	630	}
	631	width -= 2*m_extraBorderSize;
	632
	633	// Bottom
	634	if (m_sashes[2].m_show)
	635	{
	636	height -= m_borderSize;
	637	}
	638	height -= 2*m_extraBorderSize;
	639
	640	child->SetSize(x, y, width, height);
	641	}
	642	else if (GetChildren().Number() > 1)
	643	{
	644	// Perhaps multiple children are themselves sash windows.
	645	// TODO: this doesn't really work because the subwindows sizes/positions
	646	// must be set to leave a gap for the parent's sash (hit-test and decorations).
	647	// Perhaps we can allow for this within LayoutWindow, testing whether the parent
	648	// is a sash window, and if so, allowing some space for the edges.
	649	wxLayoutAlgorithm layout;
	650	layout.LayoutWindow(this);
	651	}
	652
	653	wxClientDC dc(this);
	654	DrawBorders(dc);
	655	DrawSashes(dc);
	656	}
	657
	658	// Initialize colours
	659	void wxSashWindow::InitColours()
	660	{
	661	// Shadow colours
	662	#ifndef __WIN16__
	663	m_faceColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
	664	m_mediumShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW);
	665	m_darkShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW);
	666	m_lightShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT);
	667	m_hilightColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT);
	668	#else
	669	m_faceColour = *(wxTheColourDatabase->FindColour("LIGHT GREY"));
	670	m_mediumShadowColour = *(wxTheColourDatabase->FindColour("GREY"));
	671	m_darkShadowColour = *(wxTheColourDatabase->FindColour("BLACK"));
	672	m_lightShadowColour = *(wxTheColourDatabase->FindColour("LIGHT GREY"));
	673	m_hilightColour = *(wxTheColourDatabase->FindColour("WHITE"));
	674	#endif
	675	}
	676
	677	void wxSashWindow::SetSashVisible(wxSashEdgePosition edge, bool sash)
	678	{
	679	m_sashes[edge].m_show = sash;
	680	if (sash)
	681	m_sashes[edge].m_margin = m_borderSize;
	682	else
	683	m_sashes[edge].m_margin = 0;
	684	}
	685
	686	#endif // wxUSE_SASH