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 licence
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#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 "wx/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)
#if defined( __WXMSW__ ) || defined( __WXMAC__)
    EVT_SET_CURSOR(wxSashWindow::OnSetCursor)
#endif // wxMSW

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, y;
    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 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) )
            {
                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

#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 licence
	12	/////////////////////////////////////////////////////////////////////////////
	13
	14	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	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 "wx/math.h"
	34
	35	#include <stdlib.h>
	36
	37	#include "wx/dcscreen.h"
	38	#include "wx/sashwin.h"
	39	#include "wx/laywin.h"
	40
	41	DEFINE_EVENT_TYPE(wxEVT_SASH_DRAGGED)
	42
	43	IMPLEMENT_DYNAMIC_CLASS(wxSashWindow, wxWindow)
	44	IMPLEMENT_DYNAMIC_CLASS(wxSashEvent, wxCommandEvent)
	45
	46	BEGIN_EVENT_TABLE(wxSashWindow, wxWindow)
	47	EVT_PAINT(wxSashWindow::OnPaint)
	48	EVT_SIZE(wxSashWindow::OnSize)
	49	EVT_MOUSE_EVENTS(wxSashWindow::OnMouseEvent)
	50	#if defined( __WXMSW__ ) \|\| defined( __WXMAC__)
	51	EVT_SET_CURSOR(wxSashWindow::OnSetCursor)
	52	#endif // wxMSW
	53
	54	END_EVENT_TABLE()
	55
	56	bool wxSashWindow::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos,
	57	const wxSize& size, long style, const wxString& name)
	58	{
	59	return wxWindow::Create(parent, id, pos, size, style, name);
	60	}
	61
	62	wxSashWindow::~wxSashWindow()
	63	{
	64	delete m_sashCursorWE;
	65	delete m_sashCursorNS;
	66	}
	67
	68	void wxSashWindow::Init()
	69	{
	70	m_draggingEdge = wxSASH_NONE;
	71	m_dragMode = wxSASH_DRAG_NONE;
	72	m_oldX = 0;
	73	m_oldY = 0;
	74	m_firstX = 0;
	75	m_firstY = 0;
	76	m_borderSize = 3;
	77	m_extraBorderSize = 0;
	78	m_minimumPaneSizeX = 0;
	79	m_minimumPaneSizeY = 0;
	80	m_maximumPaneSizeX = 10000;
	81	m_maximumPaneSizeY = 10000;
	82	m_sashCursorWE = new wxCursor(wxCURSOR_SIZEWE);
	83	m_sashCursorNS = new wxCursor(wxCURSOR_SIZENS);
	84	m_mouseCaptured = false;
	85	m_currentCursor = NULL;
	86
	87	// Eventually, we'll respond to colour change messages
	88	InitColours();
	89	}
	90
	91	void wxSashWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
	92	{
	93	wxPaintDC dc(this);
	94
	95	DrawBorders(dc);
	96	DrawSashes(dc);
	97	}
	98
	99	void wxSashWindow::OnMouseEvent(wxMouseEvent& event)
	100	{
	101	wxCoord x, y;
	102	event.GetPosition(&x, &y);
	103
	104	wxSashEdgePosition sashHit = SashHitTest(x, y);
	105
	106	if (event.LeftDown())
	107	{
	108	CaptureMouse();
	109	m_mouseCaptured = true;
	110
	111	if ( sashHit != wxSASH_NONE )
	112	{
	113	// Required for X to specify that
	114	// that we wish to draw on top of all windows
	115	// - and we optimise by specifying the area
	116	// for creating the overlap window.
	117	// Find the first frame or dialog and use this to specify
	118	// the area to draw on.
	119	wxWindow* parent = this;
	120
	121	while (parent && !parent->IsKindOf(CLASSINFO(wxDialog)) &&
	122	!parent->IsKindOf(CLASSINFO(wxFrame)))
	123	parent = parent->GetParent();
	124
	125	wxScreenDC::StartDrawingOnTop(parent);
	126
	127	// We don't say we're dragging yet; we leave that
	128	// decision for the Dragging() branch, to ensure
	129	// the user has dragged a little bit.
	130	m_dragMode = wxSASH_DRAG_LEFT_DOWN;
	131	m_draggingEdge = sashHit;
	132	m_firstX = x;
	133	m_firstY = y;
	134
	135	if ( (sashHit == wxSASH_LEFT) \|\| (sashHit == wxSASH_RIGHT) )
	136	{
	137	if (m_currentCursor != m_sashCursorWE)
	138	{
	139	SetCursor(*m_sashCursorWE);
	140	}
	141	m_currentCursor = m_sashCursorWE;
	142	}
	143	else
	144	{
	145	if (m_currentCursor != m_sashCursorNS)
	146	{
	147	SetCursor(*m_sashCursorNS);
	148	}
	149	m_currentCursor = m_sashCursorNS;
	150	}
	151	}
	152	}
	153	else if ( event.LeftUp() && m_dragMode == wxSASH_DRAG_LEFT_DOWN )
	154	{
	155	// Wasn't a proper drag
	156	if (m_mouseCaptured)
	157	ReleaseMouse();
	158	m_mouseCaptured = false;
	159
	160	wxScreenDC::EndDrawingOnTop();
	161	m_dragMode = wxSASH_DRAG_NONE;
	162	m_draggingEdge = wxSASH_NONE;
	163	}
	164	else if (event.LeftUp() && m_dragMode == wxSASH_DRAG_DRAGGING)
	165	{
	166	// We can stop dragging now and see what we've got.
	167	m_dragMode = wxSASH_DRAG_NONE;
	168	if (m_mouseCaptured)
	169	ReleaseMouse();
	170	m_mouseCaptured = false;
	171
	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 = wxDefaultCoord,
	192	newWidth = wxDefaultCoord;
	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 == wxDefaultCoord )
	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 == wxDefaultCoord )
	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	if (m_mouseCaptured)
	292	ReleaseMouse();
	293	m_mouseCaptured = false;
	294	}
	295	else if (event.Moving() && !event.Dragging())
	296	{
	297	// Just change the cursor if required
	298	if ( sashHit != wxSASH_NONE )
	299	{
	300	if ( (sashHit == wxSASH_LEFT) \|\| (sashHit == wxSASH_RIGHT) )
	301	{
	302	if (m_currentCursor != m_sashCursorWE)
	303	{
	304	SetCursor(*m_sashCursorWE);
	305	}
	306	m_currentCursor = m_sashCursorWE;
	307	}
	308	else
	309	{
	310	if (m_currentCursor != m_sashCursorNS)
	311	{
	312	SetCursor(*m_sashCursorNS);
	313	}
	314	m_currentCursor = m_sashCursorNS;
	315	}
	316	}
	317	else
	318	{
	319	SetCursor(wxNullCursor);
	320	m_currentCursor = NULL;
	321	}
	322	}
	323	else if ( event.Dragging() &&
	324	((m_dragMode == wxSASH_DRAG_DRAGGING) \|\|
	325	(m_dragMode == wxSASH_DRAG_LEFT_DOWN)) )
	326	{
	327	if ( (m_draggingEdge == wxSASH_LEFT) \|\| (m_draggingEdge == wxSASH_RIGHT) )
	328	{
	329	if (m_currentCursor != m_sashCursorWE)
	330	{
	331	SetCursor(*m_sashCursorWE);
	332	}
	333	m_currentCursor = m_sashCursorWE;
	334	}
	335	else
	336	{
	337	if (m_currentCursor != m_sashCursorNS)
	338	{
	339	SetCursor(*m_sashCursorNS);
	340	}
	341	m_currentCursor = m_sashCursorNS;
	342	}
	343
	344	if (m_dragMode == wxSASH_DRAG_LEFT_DOWN)
	345	{
	346	m_dragMode = wxSASH_DRAG_DRAGGING;
	347	DrawSashTracker(m_draggingEdge, x, y);
	348	}
	349	else
	350	{
	351	if ( m_dragMode == wxSASH_DRAG_DRAGGING )
	352	{
	353	// Erase old tracker
	354	DrawSashTracker(m_draggingEdge, m_oldX, m_oldY);
	355
	356	// Draw new one
	357	DrawSashTracker(m_draggingEdge, x, y);
	358	}
	359	}
	360	m_oldX = x;
	361	m_oldY = y;
	362	}
	363	else if ( event.LeftDClick() )
	364	{
	365	// Nothing
	366	}
	367	else
	368	{
	369	}
	370	}
	371
	372	void wxSashWindow::OnSize(wxSizeEvent& WXUNUSED(event))
	373	{
	374	SizeWindows();
	375	}
	376
	377	wxSashEdgePosition wxSashWindow::SashHitTest(int x, int y, int WXUNUSED(tolerance))
	378	{
	379	int cx, cy;
	380	GetClientSize(& cx, & cy);
	381
	382	int i;
	383	for (i = 0; i < 4; i++)
	384	{
	385	wxSashEdge& edge = m_sashes[i];
	386	wxSashEdgePosition position = (wxSashEdgePosition) i ;
	387
	388	if (edge.m_show)
	389	{
	390	switch (position)
	391	{
	392	case wxSASH_TOP:
	393	{
	394	if (y >= 0 && y <= GetEdgeMargin(position))
	395	return wxSASH_TOP;
	396	break;
	397	}
	398	case wxSASH_RIGHT:
	399	{
	400	if ((x >= cx - GetEdgeMargin(position)) && (x <= cx))
	401	return wxSASH_RIGHT;
	402	break;
	403	}
	404	case wxSASH_BOTTOM:
	405	{
	406	if ((y >= cy - GetEdgeMargin(position)) && (y <= cy))
	407	return wxSASH_BOTTOM;
	408	break;
	409	}
	410	case wxSASH_LEFT:
	411	{
	412	if ((x <= GetEdgeMargin(position)) && (x >= 0))
	413	return wxSASH_LEFT;
	414	break;
	415	}
	416	case wxSASH_NONE:
	417	{
	418	break;
	419	}
	420	}
	421	}
	422	}
	423	return wxSASH_NONE;
	424	}
	425
	426	// Draw 3D effect borders
	427	void wxSashWindow::DrawBorders(wxDC& dc)
	428	{
	429	int w, h;
	430	GetClientSize(&w, &h);
	431
	432	wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
	433	wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
	434	wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
	435	wxPen hilightPen(m_hilightColour, 1, wxSOLID);
	436
	437	if ( GetWindowStyleFlag() & wxSW_3DBORDER )
	438	{
	439	dc.SetPen(mediumShadowPen);
	440	dc.DrawLine(0, 0, w-1, 0);
	441	dc.DrawLine(0, 0, 0, h - 1);
	442
	443	dc.SetPen(darkShadowPen);
	444	dc.DrawLine(1, 1, w-2, 1);
	445	dc.DrawLine(1, 1, 1, h-2);
	446
	447	dc.SetPen(hilightPen);
	448	dc.DrawLine(0, h-1, w-1, h-1);
	449	dc.DrawLine(w-1, 0, w-1, h); // Surely the maximum y pos. should be h - 1.
	450	/// Anyway, h is required for MSW.
	451
	452	dc.SetPen(lightShadowPen);
	453	dc.DrawLine(w-2, 1, w-2, h-2); // Right hand side
	454	dc.DrawLine(1, h-2, w-1, h-2); // Bottom
	455	}
	456	else if ( GetWindowStyleFlag() & wxSW_BORDER )
	457	{
	458	dc.SetBrush(*wxTRANSPARENT_BRUSH);
	459	dc.SetPen(*wxBLACK_PEN);
	460	dc.DrawRectangle(0, 0, w-1, h-1);
	461	}
	462
	463	dc.SetPen(wxNullPen);
	464	dc.SetBrush(wxNullBrush);
	465	}
	466
	467	void wxSashWindow::DrawSashes(wxDC& dc)
	468	{
	469	int i;
	470	for (i = 0; i < 4; i++)
	471	if (m_sashes[i].m_show)
	472	DrawSash((wxSashEdgePosition) i, dc);
	473	}
	474
	475	// Draw the sash
	476	void wxSashWindow::DrawSash(wxSashEdgePosition edge, wxDC& dc)
	477	{
	478	int w, h;
	479	GetClientSize(&w, &h);
	480
	481	wxPen facePen(m_faceColour, 1, wxSOLID);
	482	wxBrush faceBrush(m_faceColour, wxSOLID);
	483	wxPen mediumShadowPen(m_mediumShadowColour, 1, wxSOLID);
	484	wxPen darkShadowPen(m_darkShadowColour, 1, wxSOLID);
	485	wxPen lightShadowPen(m_lightShadowColour, 1, wxSOLID);
	486	wxPen hilightPen(m_hilightColour, 1, wxSOLID);
	487	wxColour blackClr(0, 0, 0);
	488	wxColour whiteClr(255, 255, 255);
	489	wxPen blackPen(blackClr, 1, wxSOLID);
	490	wxPen whitePen(whiteClr, 1, wxSOLID);
	491
	492	if ( edge == wxSASH_LEFT \|\| edge == wxSASH_RIGHT )
	493	{
	494	int sashPosition = (edge == wxSASH_LEFT) ? 0 : ( w - GetEdgeMargin(edge) );
	495
	496	dc.SetPen(facePen);
	497	dc.SetBrush(faceBrush);
	498	dc.DrawRectangle(sashPosition, 0, GetEdgeMargin(edge), h);
	499
	500	if (GetWindowStyleFlag() & wxSW_3DSASH)
	501	{
	502	if (edge == wxSASH_LEFT)
	503	{
	504	// Draw a dark grey line on the left to indicate that the
	505	// sash is raised
	506	dc.SetPen(mediumShadowPen);
	507	dc.DrawLine(GetEdgeMargin(edge), 0, GetEdgeMargin(edge), h);
	508	}
	509	else
	510	{
	511	// Draw a highlight line on the right to indicate that the
	512	// sash is raised
	513	dc.SetPen(hilightPen);
	514	dc.DrawLine(w - GetEdgeMargin(edge), 0, w - GetEdgeMargin(edge), h);
	515	}
	516	}
	517	}
	518	else // top or bottom
	519	{
	520	int sashPosition = (edge == wxSASH_TOP) ? 0 : ( h - GetEdgeMargin(edge) );
	521
	522	dc.SetPen(facePen);
	523	dc.SetBrush(faceBrush);
	524	dc.DrawRectangle(0, sashPosition, w, GetEdgeMargin(edge));
	525
	526	if (GetWindowStyleFlag() & wxSW_3DSASH)
	527	{
	528	if (edge == wxSASH_BOTTOM)
	529	{
	530	// Draw a highlight line on the bottom to indicate that the
	531	// sash is raised
	532	dc.SetPen(hilightPen);
	533	dc.DrawLine(0, h - GetEdgeMargin(edge), w, h - GetEdgeMargin(edge));
	534	}
	535	else
	536	{
	537	// Draw a drak grey line on the top to indicate that the
	538	// sash is raised
	539	dc.SetPen(mediumShadowPen);
	540	dc.DrawLine(1, GetEdgeMargin(edge), w-1, GetEdgeMargin(edge));
	541	}
	542	}
	543	}
	544
	545	dc.SetPen(wxNullPen);
	546	dc.SetBrush(wxNullBrush);
	547	}
	548
	549	// Draw the sash tracker (for whilst moving the sash)
	550	void wxSashWindow::DrawSashTracker(wxSashEdgePosition edge, int x, int y)
	551	{
	552	int w, h;
	553	GetClientSize(&w, &h);
	554
	555	wxScreenDC screenDC;
	556	int x1, y1;
	557	int x2, y2;
	558
	559	if ( edge == wxSASH_LEFT \|\| edge == wxSASH_RIGHT )
	560	{
	561	x1 = x; y1 = 2;
	562	x2 = x; y2 = h-2;
	563
	564	if ( (edge == wxSASH_LEFT) && (x1 > w) )
	565	{
	566	x1 = w; x2 = w;
	567	}
	568	else if ( (edge == wxSASH_RIGHT) && (x1 < 0) )
	569	{
	570	x1 = 0; x2 = 0;
	571	}
	572	}
	573	else
	574	{
	575	x1 = 2; y1 = y;
	576	x2 = w-2; y2 = y;
	577
	578	if ( (edge == wxSASH_TOP) && (y1 > h) )
	579	{
	580	y1 = h;
	581	y2 = h;
	582	}
	583	else if ( (edge == wxSASH_BOTTOM) && (y1 < 0) )
	584	{
	585	y1 = 0;
	586	y2 = 0;
	587	}
	588	}
	589
	590	ClientToScreen(&x1, &y1);
	591	ClientToScreen(&x2, &y2);
	592
	593	wxPen sashTrackerPen(*wxBLACK, 2, wxSOLID);
	594
	595	screenDC.SetLogicalFunction(wxINVERT);
	596	screenDC.SetPen(sashTrackerPen);
	597	screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
	598
	599	screenDC.DrawLine(x1, y1, x2, y2);
	600
	601	screenDC.SetLogicalFunction(wxCOPY);
	602
	603	screenDC.SetPen(wxNullPen);
	604	screenDC.SetBrush(wxNullBrush);
	605	}
	606
	607	// Position and size subwindows.
	608	// Note that the border size applies to each subwindow, not
	609	// including the edges next to the sash.
	610	void wxSashWindow::SizeWindows()
	611	{
	612	int cw, ch;
	613	GetClientSize(&cw, &ch);
	614
	615	if (GetChildren().GetCount() == 1)
	616	{
	617	wxWindow* child = GetChildren().GetFirst()->GetData();
	618
	619	int x = 0;
	620	int y = 0;
	621	int width = cw;
	622	int height = ch;
	623
	624	// Top
	625	if (m_sashes[0].m_show)
	626	{
	627	y = m_borderSize;
	628	height -= m_borderSize;
	629	}
	630	y += m_extraBorderSize;
	631
	632	// Left
	633	if (m_sashes[3].m_show)
	634	{
	635	x = m_borderSize;
	636	width -= m_borderSize;
	637	}
	638	x += m_extraBorderSize;
	639
	640	// Right
	641	if (m_sashes[1].m_show)
	642	{
	643	width -= m_borderSize;
	644	}
	645	width -= 2*m_extraBorderSize;
	646
	647	// Bottom
	648	if (m_sashes[2].m_show)
	649	{
	650	height -= m_borderSize;
	651	}
	652	height -= 2*m_extraBorderSize;
	653
	654	child->SetSize(x, y, width, height);
	655	}
	656	else if (GetChildren().GetCount() > 1)
	657	{
	658	// Perhaps multiple children are themselves sash windows.
	659	// TODO: this doesn't really work because the subwindows sizes/positions
	660	// must be set to leave a gap for the parent's sash (hit-test and decorations).
	661	// Perhaps we can allow for this within LayoutWindow, testing whether the parent
	662	// is a sash window, and if so, allowing some space for the edges.
	663	wxLayoutAlgorithm layout;
	664	layout.LayoutWindow(this);
	665	}
	666
	667	wxClientDC dc(this);
	668	DrawBorders(dc);
	669	DrawSashes(dc);
	670	}
	671
	672	// Initialize colours
	673	void wxSashWindow::InitColours()
	674	{
	675	// Shadow colours
	676	m_faceColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
	677	m_mediumShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DSHADOW);
	678	m_darkShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DDKSHADOW);
	679	m_lightShadowColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT);
	680	m_hilightColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DHILIGHT);
	681	}
	682
	683	void wxSashWindow::SetSashVisible(wxSashEdgePosition edge, bool sash)
	684	{
	685	m_sashes[edge].m_show = sash;
	686	if (sash)
	687	m_sashes[edge].m_margin = m_borderSize;
	688	else
	689	m_sashes[edge].m_margin = 0;
	690	}
	691
	692	#if defined( __WXMSW__ ) \|\| defined( __WXMAC__)
	693
	694	// this is currently called (and needed) under MSW only...
	695	void wxSashWindow::OnSetCursor(wxSetCursorEvent& event)
	696	{
	697	// if we don't do it, the resizing cursor might be set for child window:
	698	// and like this we explicitly say that our cursor should not be used for
	699	// children windows which overlap us
	700
	701	if ( SashHitTest(event.GetX(), event.GetY()) != wxSASH_NONE)
	702	{
	703	// default processing is ok
	704	event.Skip();
	705	}
	706	//else: do nothing, in particular, don't call Skip()
	707	}
	708
	709	#endif // wxMSW
	710
	711	#endif // wxUSE_SASH