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()

wxSashWindow::wxSashWindow()
{
    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_sashCursorWE = NULL;
    m_sashCursorNS = NULL;

    m_minimumPaneSizeX = 0;
    m_minimumPaneSizeY = 0;
    m_maximumPaneSizeX = 10000;
    m_maximumPaneSizeY = 10000;
}

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

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

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
#ifdef __WXMOTIF__
    SetCursor(* wxSTANDARD_CURSOR);
#endif
#ifdef __WXMSW__
    SetCursor(wxCursor());
#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 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_3D )
    {
        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_3D)
        {
            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 light grey line on the right to indicate that the
                // sash is raised
                dc.SetPen(lightShadowPen);
                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_3D)
        {
            if (edge == wxSASH_BOTTOM)
            {
                // Draw a light grey line on the bottom to indicate that the
                // sash is raised
                dc.SetPen(lightShadowPen);
                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, 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	wxSashWindow::wxSashWindow()
	49	{
	50	m_draggingEdge = wxSASH_NONE;
	51	m_dragMode = wxSASH_DRAG_NONE;
	52	m_oldX = 0;
	53	m_oldY = 0;
	54	m_firstX = 0;
	55	m_firstY = 0;
	56	m_borderSize = 3 ;
	57	m_extraBorderSize = 0;
	58	m_sashCursorWE = NULL;
	59	m_sashCursorNS = NULL;
	60
	61	m_minimumPaneSizeX = 0;
	62	m_minimumPaneSizeY = 0;
	63	m_maximumPaneSizeX = 10000;
	64	m_maximumPaneSizeY = 10000;
	65	}
	66
	67	wxSashWindow::wxSashWindow(wxWindow *parent, wxWindowID id, const wxPoint& pos,
	68	const wxSize& size, long style, const wxString& name)
	69	:wxWindow(parent, id, pos, size, style, name)
	70	{
	71	m_draggingEdge = wxSASH_NONE;
	72	m_dragMode = wxSASH_DRAG_NONE;
	73	m_oldX = 0;
	74	m_oldY = 0;
	75	m_firstX = 0;
	76	m_firstY = 0;
	77	m_borderSize = 3;
	78	m_extraBorderSize = 0;
	79	m_minimumPaneSizeX = 0;
	80	m_minimumPaneSizeY = 0;
	81	m_maximumPaneSizeX = 10000;
	82	m_maximumPaneSizeY = 10000;
	83	m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
	84	m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
	85
	86	// Eventually, we'll respond to colour change messages
	87	InitColours();
	88	}
	89
	90	wxSashWindow::~wxSashWindow()
	91	{
	92	delete m_sashCursorWE;
	93	delete m_sashCursorNS;
	94	}
	95
	96	void wxSashWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
	97	{
	98	wxPaintDC dc(this);
	99
	100	// if ( m_borderSize > 0 )
	101	DrawBorders(dc);
	102
	103	DrawSashes(dc);
	104	}
	105
	106	void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
	107	{
	108	wxCoord x, y;
	109	event.GetPosition(&x, &y);
	110
	111	wxSashEdgePosition sashHit = SashHitTest(x, y);
	112
	113	// reset the cursor
	114	#ifdef __WXMOTIF__
	115	SetCursor(* wxSTANDARD_CURSOR);
	116	#endif
	117	#ifdef __WXMSW__
	118	SetCursor(wxCursor());
	119	#endif
	120
	121	if (event.LeftDown())
	122	{
	123	CaptureMouse();
	124
	125	if ( sashHit != wxSASH_NONE )
	126	{
	127	// Required for X to specify that
	128	// that we wish to draw on top of all windows
	129	// - and we optimise by specifying the area
	130	// for creating the overlap window.
	131	// Find the first frame or dialog and use this to specify
	132	// the area to draw on.
	133	wxWindow* parent = this;
	134
	135	while (parent && !parent->IsKindOf(CLASSINFO(wxDialog)) &&
	136	!parent->IsKindOf(CLASSINFO(wxFrame)))
	137	parent = parent->GetParent();
	138
	139	wxScreenDC::StartDrawingOnTop(parent);
	140
	141	// We don't say we're dragging yet; we leave that
	142	// decision for the Dragging() branch, to ensure
	143	// the user has dragged a little bit.
	144	m_dragMode = wxSASH_DRAG_LEFT_DOWN;
	145	m_draggingEdge = sashHit;
	146	m_firstX = x;
	147	m_firstY = y;
	148
	149	if ( (sashHit == wxSASH_LEFT) \|\| (sashHit == wxSASH_RIGHT) )
	150	{
	151	SetCursor(*m_sashCursorWE);
	152	}
	153	else
	154	{
	155	SetCursor(*m_sashCursorNS);
	156	}
	157	}
	158	}
	159	else if ( event.LeftUp() && m_dragMode == wxSASH_DRAG_LEFT_DOWN )
	160	{
	161	// Wasn't a proper drag
	162	ReleaseMouse();
	163	wxScreenDC::EndDrawingOnTop();
	164	m_dragMode = wxSASH_DRAG_NONE;
	165	m_draggingEdge = wxSASH_NONE;
	166	}
	167	else if (event.LeftUp() && m_dragMode == wxSASH_DRAG_DRAGGING)
	168	{
	169	// We can stop dragging now and see what we've got.
	170	m_dragMode = wxSASH_DRAG_NONE;
	171	ReleaseMouse();
	172	// Erase old tracker
	173	DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
	174
	175	// End drawing on top (frees the window used for drawing
	176	// over the screen)
	177	wxScreenDC::EndDrawingOnTop();
	178
	179	int w, h;
	180	GetSize(&w, &h);
	181	int xp, yp;
	182	GetPosition(&xp, &yp);
	183
	184	wxSashEdgePosition edge = m_draggingEdge;
	185	m_draggingEdge = wxSASH_NONE;
	186
	187	wxRect dragRect;
	188	wxSashDragStatus status = wxSASH_STATUS_OK;
	189
	190	// the new height and width of the window - if -1, it didn't change
	191	int newHeight = -1,
	192	newWidth = -1;
	193
	194	// NB: x and y may be negative and they're relative to the sash window
	195	// upper left corner, while xp and yp are expressed in the parent
	196	// window system of coordinates, so adjust them! After this
	197	// adjustment, all coordinates are relative to the parent window.
	198	y += yp;
	199	x += xp;
	200
	201	switch (edge)
	202	{
	203	case wxSASH_TOP:
	204	if ( y > yp + h )
	205	{
	206	// top sash shouldn't get below the bottom one
	207	status = wxSASH_STATUS_OUT_OF_RANGE;
	208	}
	209	else
	210	{
	211	newHeight = h - (y - yp);
	212	}
	213	break;
	214
	215	case wxSASH_BOTTOM:
	216	if ( y < yp )
	217	{
	218	// bottom sash shouldn't get above the top one
	219	status = wxSASH_STATUS_OUT_OF_RANGE;
	220	}
	221	else
	222	{
	223	newHeight = y - yp;
	224	}
	225	break;
	226
	227	case wxSASH_LEFT:
	228	if ( x > xp + w )
	229	{
	230	// left sash shouldn't get beyond the right one
	231	status = wxSASH_STATUS_OUT_OF_RANGE;
	232	}
	233	else
	234	{
	235	newWidth = w - (x - xp);
	236	}
	237	break;
	238
	239	case wxSASH_RIGHT:
	240	if ( x < xp )
	241	{
	242	// and the right sash, finally, shouldn't be beyond the
	243	// left one
	244	status = wxSASH_STATUS_OUT_OF_RANGE;
	245	}
	246	else
	247	{
	248	newWidth = x - xp;
	249	}
	250	break;
	251
	252	case wxSASH_NONE:
	253	// can this happen at all?
	254	break;
	255	}
	256
	257	if ( newHeight == -1 )
	258	{
	259	// didn't change
	260	newHeight = h;
	261	}
	262	else
	263	{
	264	// make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
	265	newHeight = wxMax(newHeight, m_minimumPaneSizeY);
	266	newHeight = wxMin(newHeight, m_maximumPaneSizeY);
	267	}
	268
	269	if ( newWidth == -1 )
	270	{
	271	// didn't change
	272	newWidth = w;
	273	}
	274	else
	275	{
	276	// make sure it's in m_minimumPaneSizeY..m_maximumPaneSizeY range
	277	newWidth = wxMax(newWidth, m_minimumPaneSizeX);
	278	newWidth = wxMin(newWidth, m_maximumPaneSizeX);
	279	}
	280
	281	dragRect = wxRect(x, y, newWidth, newHeight);
	282
	283	wxSashEvent event(GetId(), edge);
	284	event.SetEventObject(this);
	285	event.SetDragStatus(status);
	286	event.SetDragRect(dragRect);
	287	GetEventHandler()->ProcessEvent(event);
	288	}
	289	else if ( event.LeftUp() )
	290	{
	291	ReleaseMouse();
	292	}
	293	else if (event.Moving() && !event.Dragging())
	294	{
	295	// Just change the cursor if required
	296	if ( sashHit != wxSASH_NONE )
	297	{
	298	if ( (sashHit == wxSASH_LEFT) \|\| (sashHit == wxSASH_RIGHT) )
	299	{
	300	SetCursor(*m_sashCursorWE);
	301	}
	302	else
	303	{
	304	SetCursor(*m_sashCursorNS);
	305	}
	306	}
	307	}
	308	else if ( event.Dragging() &&
	309	((m_dragMode == wxSASH_DRAG_DRAGGING) \|\|
	310	(m_dragMode == wxSASH_DRAG_LEFT_DOWN)) )
	311	{
	312	if ( (m_draggingEdge == wxSASH_LEFT) \|\| (m_draggingEdge == wxSASH_RIGHT) )
	313	{
	314	SetCursor(*m_sashCursorWE);
	315	}
	316	else
	317	{
	318	SetCursor(*m_sashCursorNS);
	319	}
	320
	321	if (m_dragMode == wxSASH_DRAG_LEFT_DOWN)
	322	{
	323	m_dragMode = wxSASH_DRAG_DRAGGING;
	324	DrawSashTracker(m_draggingEdge, x, y);
	325	}
	326	else
	327	{
	328	if ( m_dragMode == wxSASH_DRAG_DRAGGING )
	329	{
	330	// Erase old tracker
	331	DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
	332
	333	// Draw new one
	334	DrawSashTracker(m_draggingEdge, x, y);
	335	}
	336	}
	337	m_oldX = x;
	338	m_oldY = y;
	339	}
	340	else if ( event.LeftDClick() )
	341	{
	342	// Nothing
	343	}
	344	else
	345	{
	346	}
	347	}
	348
	349	void wxSashWindow::OnSize(wxSizeEvent& WXUNUSED(event))
	350	{
	351	SizeWindows();
	352	}
	353
	354	wxSashEdgePosition wxSashWindow::SashHitTest(int x, int y, int WXUNUSED(tolerance))
	355	{
	356	int cx, cy;
	357	GetClientSize(& cx, & cy);
	358
	359	int i;
	360	for (i = 0; i < 4; i++)
	361	{
	362	wxSashEdge& edge = m_sashes[i];
	363	wxSashEdgePosition position = (wxSashEdgePosition) i ;
	364
	365	if (edge.m_show)
	366	{
	367	switch (position)
	368	{
	369	case wxSASH_TOP:
	370	{
	371	if (y >= 0 && y <= GetEdgeMargin(position))
	372	return wxSASH_TOP;
	373	break;
	374	}
	375	case wxSASH_RIGHT:
	376	{
	377	if ((x >= cx - GetEdgeMargin(position)) && (x <= cx))
	378	return wxSASH_RIGHT;
	379	break;
	380	}
	381	case wxSASH_BOTTOM:
	382	{
	383	if ((y >= cy - GetEdgeMargin(position)) && (y <= cy))
	384	return wxSASH_BOTTOM;
	385	break;
	386	}
	387	case wxSASH_LEFT:
	388	{
	389	if ((x <= GetEdgeMargin(position)) && (x >= 0))
	390	return wxSASH_LEFT;
	391	break;
	392	}
	393	case wxSASH_NONE:
	394	{
	395	break;
	396	}
	397	}
	398	}
	399	}
	400	return wxSASH_NONE;
	401	}
	402
	403	// Draw 3D effect borders
	404	void wxSashWindow::DrawBorders(wxDC& dc)
	405	{
	406	int w, h;
	407	GetClientSize(&w, &h);
	408
	409	wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
	410	wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
	411	wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
	412	wxPen hilightPen(m_hilightColour, 1, wxSOLID);
	413
	414	if ( GetWindowStyleFlag() & wxSW_3D )
	415	{
	416	dc.SetPen(mediumShadowPen);
	417	dc.DrawLine(0, 0, w-1, 0);
	418	dc.DrawLine(0, 0, 0, h - 1);
	419
	420	dc.SetPen(darkShadowPen);
	421	dc.DrawLine(1, 1, w-2, 1);
	422	dc.DrawLine(1, 1, 1, h-2);
	423
	424	dc.SetPen(hilightPen);
	425	dc.DrawLine(0, h-1, w-1, h-1);
	426	dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
	427	/// Anyway, h is required for MSW.
	428
	429	dc.SetPen(lightShadowPen);
	430	dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
	431	dc.DrawLine(1, h-2, w-1, h-2); // Bottom
	432	}
	433	else if ( GetWindowStyleFlag() & wxSW_BORDER )
	434	{
	435	dc.SetBrush(*wxTRANSPARENT_BRUSH);
	436	dc.SetPen(*wxBLACK_PEN);
	437	dc.DrawRectangle(0, 0, w-1, h-1);
	438	}
	439
	440	dc.SetPen(wxNullPen);
	441	dc.SetBrush(wxNullBrush);
	442	}
	443
	444	void wxSashWindow::DrawSashes(wxDC& dc)
	445	{
	446	int i;
	447	for (i = 0; i < 4; i++)
	448	if (m_sashes[i].m_show)
	449	DrawSash((wxSashEdgePosition) i, dc);
	450	}
	451
	452	// Draw the sash
	453	void wxSashWindow::DrawSash(wxSashEdgePosition edge, wxDC& dc)
	454	{
	455	int w, h;
	456	GetClientSize(&w, &h);
	457
	458	wxPen facePen(m_faceColour, 1, wxSOLID);
	459	wxBrush faceBrush(m_faceColour, wxSOLID);
	460	wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
	461	wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
	462	wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
	463	wxPen hilightPen(m_hilightColour, 1, wxSOLID);
	464	wxPen blackPen(wxColour(0, 0, 0), 1, wxSOLID);
	465	wxPen whitePen(wxColour(255, 255, 255), 1, wxSOLID);
	466
	467	if ( edge == wxSASH_LEFT \|\| edge == wxSASH_RIGHT )
	468	{
	469	int sashPosition = 0;
	470	if (edge == wxSASH_LEFT)
	471	sashPosition = 0;
	472	else
	473	sashPosition = w - GetEdgeMargin(edge);
	474
	475	dc.SetPen(facePen);
	476	dc.SetBrush(faceBrush);
	477	dc.DrawRectangle(sashPosition, 0, GetEdgeMargin(edge), h);
	478
	479	if (GetWindowStyleFlag() & wxSW_3D)
	480	{
	481	if (edge == wxSASH_LEFT)
	482	{
	483	// Draw a dark grey line on the left to indicate that the
	484	// sash is raised
	485	dc.SetPen(mediumShadowPen);
	486	dc.DrawLine(GetEdgeMargin(edge), 0, GetEdgeMargin(edge), h);
	487	}
	488	else
	489	{
	490	// Draw a light grey line on the right to indicate that the
	491	// sash is raised
	492	dc.SetPen(lightShadowPen);
	493	dc.DrawLine(w - GetEdgeMargin(edge), 0, w - GetEdgeMargin(edge), h);
	494	}
	495	}
	496	}
	497	else // top or bottom
	498	{
	499	int sashPosition = 0;
	500	if (edge == wxSASH_TOP)
	501	sashPosition = 0;
	502	else
	503	sashPosition = h - GetEdgeMargin(edge);
	504
	505	dc.SetPen(facePen);
	506	dc.SetBrush(faceBrush);
	507	dc.DrawRectangle(0, sashPosition, w, GetEdgeMargin(edge));
	508
	509	if (GetWindowStyleFlag() & wxSW_3D)
	510	{
	511	if (edge == wxSASH_BOTTOM)
	512	{
	513	// Draw a light grey line on the bottom to indicate that the
	514	// sash is raised
	515	dc.SetPen(lightShadowPen);
	516	dc.DrawLine(0, h - GetEdgeMargin(edge), w, h - GetEdgeMargin(edge));
	517	}
	518	else
	519	{
	520	// Draw a drak grey line on the top to indicate that the
	521	// sash is raised
	522	dc.SetPen(mediumShadowPen);
	523	dc.DrawLine(1, GetEdgeMargin(edge), w, GetEdgeMargin(edge));
	524	}
	525	}
	526	}
	527
	528	dc.SetPen(wxNullPen);
	529	dc.SetBrush(wxNullBrush);
	530	}
	531
	532	// Draw the sash tracker (for whilst moving the sash)
	533	void wxSashWindow::DrawSashTracker(wxSashEdgePosition edge, int x, int y)
	534	{
	535	int w, h;
	536	GetClientSize(&w, &h);
	537
	538	wxScreenDC screenDC;
	539	int x1, y1;
	540	int x2, y2;
	541
	542	if ( edge == wxSASH_LEFT \|\| edge == wxSASH_RIGHT )
	543	{
	544	x1 = x; y1 = 2;
	545	x2 = x; y2 = h-2;
	546
	547	if ( (edge == wxSASH_LEFT) && (x1 > w) )
	548	{
	549	x1 = w; x2 = w;
	550	}
	551	else if ( (edge == wxSASH_RIGHT) && (x1 < 0) )
	552	{
	553	x1 = 0; x2 = 0;
	554	}
	555	}
	556	else
	557	{
	558	x1 = 2; y1 = y;
	559	x2 = w-2; y2 = y;
	560
	561	if ( (edge == wxSASH_TOP) && (y1 > h) )
	562	{
	563	y1 = h;
	564	y2 = h;
	565	}
	566	else if ( (edge == wxSASH_BOTTOM) && (y1 < 0) )
	567	{
	568	y1 = 0;
	569	y2 = 0;
	570	}
	571	}
	572
	573	ClientToScreen(&x1, &y1);
	574	ClientToScreen(&x2, &y2);
	575
	576	wxPen sashTrackerPen(*wxBLACK, 2, wxSOLID);
	577
	578	screenDC.SetLogicalFunction(wxINVERT);
	579	screenDC.SetPen(sashTrackerPen);
	580	screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
	581
	582	screenDC.DrawLine(x1, y1, x2, y2);
	583
	584	screenDC.SetLogicalFunction(wxCOPY);
	585
	586	screenDC.SetPen(wxNullPen);
	587	screenDC.SetBrush(wxNullBrush);
	588	}
	589
	590	// Position and size subwindows.
	591	// Note that the border size applies to each subwindow, not
	592	// including the edges next to the sash.
	593	void wxSashWindow::SizeWindows()
	594	{
	595	int cw, ch;
	596	GetClientSize(&cw, &ch);
	597
	598	if (GetChildren().Number() == 1)
	599	{
	600	wxWindow* child = (wxWindow*) (GetChildren().First()->Data());
	601
	602	int x = 0;
	603	int y = 0;
	604	int width = cw;
	605	int height = ch;
	606
	607	// Top
	608	if (m_sashes[0].m_show)
	609	{
	610	y = m_borderSize;
	611	height -= m_borderSize;
	612	}
	613	y += m_extraBorderSize;
	614
	615	// Left
	616	if (m_sashes[3].m_show)
	617	{
	618	x = m_borderSize;
	619	width -= m_borderSize;
	620	}
	621	x += m_extraBorderSize;
	622
	623	// Right
	624	if (m_sashes[1].m_show)
	625	{
	626	width -= m_borderSize;
	627	}
	628	width -= 2*m_extraBorderSize;
	629
	630	// Bottom
	631	if (m_sashes[2].m_show)
	632	{
	633	height -= m_borderSize;
	634	}
	635	height -= 2*m_extraBorderSize;
	636
	637	child->SetSize(x, y, width, height);
	638	}
	639	else if (GetChildren().Number() > 1)
	640	{
	641	// Perhaps multiple children are themselves sash windows.
	642	// TODO: this doesn't really work because the subwindows sizes/positions
	643	// must be set to leave a gap for the parent's sash (hit-test and decorations).
	644	// Perhaps we can allow for this within LayoutWindow, testing whether the parent
	645	// is a sash window, and if so, allowing some space for the edges.
	646	wxLayoutAlgorithm layout;
	647	layout.LayoutWindow(this);
	648	}
	649
	650	wxClientDC dc(this);
	651	DrawBorders(dc);
	652	DrawSashes(dc);
	653	}
	654
	655	// Initialize colours
	656	void wxSashWindow::InitColours()
	657	{
	658	// Shadow colours
	659	#if defined(__WIN95__)
	660	m_faceColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
	661	m_mediumShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DSHADOW);
	662	m_darkShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DDKSHADOW);
	663	m_lightShadowColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT);
	664	m_hilightColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DHILIGHT);
	665	#else
	666	m_faceColour = *(wxTheColourDatabase->FindColour("LIGHT GREY"));
	667	m_mediumShadowColour = *(wxTheColourDatabase->FindColour("GREY"));
	668	m_darkShadowColour = *(wxTheColourDatabase->FindColour("BLACK"));
	669	m_lightShadowColour = *(wxTheColourDatabase->FindColour("LIGHT GREY"));
	670	m_hilightColour = *(wxTheColourDatabase->FindColour("WHITE"));
	671	#endif
	672	}
	673
	674	void wxSashWindow::SetSashVisible(wxSashEdgePosition edge, bool sash)
	675	{
	676	m_sashes[edge].m_show = sash;
	677	if (sash)
	678	m_sashes[edge].m_margin = m_borderSize;
	679	else
	680	m_sashes[edge].m_margin = 0;
	681	}
	682
	683	#endif // wxUSE_SASH