src/generic/sashwin.cpp

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

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_SASH

#include "wx/sashwin.h"

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

#include "wx/math.h"

#include <stdlib.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)
#if defined( __WXMSW__ ) || defined( __WXMAC__)
    EVT_SET_CURSOR(wxSashWindow::OnSetCursor)
#endif // __WXMSW__ || __WXMAC__

END_EVENT_TABLE()

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

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

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

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

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

    DrawBorders(dc);
    DrawSashes(dc);
}

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

    wxSashEdgePosition sashHit = SashHitTest(x, y);

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

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

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

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

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

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

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

        wxSashEdgePosition edge = m_draggingEdge;
        m_draggingEdge = wxSASH_NONE;

        wxRect dragRect;
        wxSashDragStatus status = wxSASH_STATUS_OK;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    wxPen mediumShadowPen(m_mediumShadowColour, 1, 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);
    wxColour blackClr(0, 0, 0);
    wxColour whiteClr(255, 255, 255);
    wxPen blackPen(blackClr, 1, wxSOLID);
    wxPen whitePen(whiteClr, 1, wxSOLID);

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

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

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

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

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

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

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

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

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

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

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

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

    wxPen sashTrackerPen(*wxBLACK, 2, 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().GetCount() == 1)
    {
        wxWindow* child = GetChildren().GetFirst()->GetData();

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

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

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

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

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

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

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

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

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

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

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

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

#endif // __WXMSW__ || __WXMAC__

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