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/////////////////////////////////////////////////////////////////////////////

// Name:        splittree.cpp

// Purpose:     Classes to achieve a remotely-scrolled tree in a splitter

//              window that can be scrolled by a scrolled window higher in the

//              hierarchy

// Author:      Julian Smart

// Modified by:

// Created:     8/7/2000

// RCS-ID:      $Id: splittree.cpp,v 1.1.1.1 2004-02-14 13:28:53 phoenix Exp $

// Copyright:   (c) Julian Smart

//

// This program is part of the eCos host tools.

//

// This program is free software; you can redistribute it and/or modify it

// under the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 of the License, or (at your option)

// any later version.

//

// This program is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

// more details.

//

// You should have received a copy of the GNU General Public License along with

// this program; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

//

/////////////////////////////////////////////////////////////////////////////

// ============================================================================

// declarations

// ============================================================================

// ----------------------------------------------------------------------------

// headers

// ----------------------------------------------------------------------------

#ifdef __GNUG__

#pragma implementation "splittree.h"

#endif

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

#include "ecpch.h"

#ifdef __WXMSW__

#include "wx/msw/private.h"

#endif

#ifdef __BORLANDC__

#pragma hdrstop

#endif

#include "wx/generic/treectlg.h"

#include "splittree.h"

#include <math.h>

/*

* wxRemotelyScrolledTreeCtrl

*/

#if USE_GENERIC_TREECTRL

IMPLEMENT_CLASS(wxRemotelyScrolledTreeCtrl, wxGenericTreeCtrl)

#else

IMPLEMENT_CLASS(wxRemotelyScrolledTreeCtrl, wxTreeCtrl)

#endif

#if USE_GENERIC_TREECTRL

BEGIN_EVENT_TABLE(wxRemotelyScrolledTreeCtrl, wxGenericTreeCtrl)

#else

BEGIN_EVENT_TABLE(wxRemotelyScrolledTreeCtrl, wxTreeCtrl)

#endif

EVT_SIZE(wxRemotelyScrolledTreeCtrl::OnSize)

EVT_TREE_ITEM_EXPANDED(-1, wxRemotelyScrolledTreeCtrl::OnExpand)

EVT_TREE_ITEM_COLLAPSED(-1, wxRemotelyScrolledTreeCtrl::OnExpand)

EVT_SCROLLWIN(wxRemotelyScrolledTreeCtrl::OnScroll)

END_EVENT_TABLE()

wxRemotelyScrolledTreeCtrl::wxRemotelyScrolledTreeCtrl(wxWindow* parent, wxWindowID id, const wxPoint& pt,

                                                       const wxSize& sz, long style):

    wxTreeCtrl(parent, id, pt, sz, style

#if wxVERSION_NUMBER > 2301

               & ~wxTR_ROW_LINES

#endif

               )

{

    m_companionWindow = NULL;

}

wxRemotelyScrolledTreeCtrl::~wxRemotelyScrolledTreeCtrl()

{

}

void wxRemotelyScrolledTreeCtrl::HideVScrollbar()

{

#ifdef __WXMSW__

    if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))

    {

        ::ShowScrollBar((HWND) GetHWND(), SB_VERT, FALSE);

    }

    else

#endif

    {

        // Implicit in overriding SetScrollbars

    }

}

// Number of pixels per user unit (0 or -1 for no scrollbar)

// Length of virtual canvas in user units

// Length of page in user units

void wxRemotelyScrolledTreeCtrl::SetScrollbars(int pixelsPerUnitX, int pixelsPerUnitY,

                                               int noUnitsX, int noUnitsY,

                                               int xPos, int yPos,

                                               bool noRefresh)

{

    if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))

    {

        wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;

        // Pass TRUE for noRefresh so that it doesn't

        // draw part of the tree as if the scroll view is

        // at zero vertically.

        win->wxGenericTreeCtrl::SetScrollbars(pixelsPerUnitX, pixelsPerUnitY, noUnitsX, 0, xPos, 0, /* noRefresh */ TRUE);

        ecScrolledWindow* scrolledWindow = GetScrolledWindow();

        if (scrolledWindow)

        {

            scrolledWindow->SetScrollbars(0, pixelsPerUnitY, 0, noUnitsY, 0, yPos, noRefresh);

        }

    }

}

// In case we're using the generic tree control.

int wxRemotelyScrolledTreeCtrl::GetScrollPos(int orient) const

{

    ecScrolledWindow* scrolledWindow = GetScrolledWindow();

    if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))

    {

        wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;

        if (orient == wxHORIZONTAL)

            return win->wxGenericTreeCtrl::GetScrollPos(orient);

        else

        {

            return scrolledWindow->GetScrollPos(orient);

        }

    }

    return 0;

}

// In case we're using the generic tree control.

// Get the view start

void wxRemotelyScrolledTreeCtrl::GetViewStart(int *x, int *y) const

{

    ecScrolledWindow* scrolledWindow = GetScrolledWindow();

    if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))

    {

        wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;

        int x1, y1, x2, y2;

        win->wxGenericTreeCtrl::GetViewStart(& x1, & y1);

        * x = x1; * y = y1;

        if (!scrolledWindow)

            return;

        scrolledWindow->GetViewStart(& x2, & y2);

        * y = y2;

    }

    else

    {

        // x is wrong since the horizontal scrollbar is controlled by the

        // tree control, but we probably don't need it.

        scrolledWindow->GetViewStart(x, y);

    }

}

// In case we're using the generic tree control.

void wxRemotelyScrolledTreeCtrl::PrepareDC(wxDC& dc)

{

    if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))

    {

        ecScrolledWindow* scrolledWindow = GetScrolledWindow();

        wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;

        int startX, startY;

        GetViewStart(& startX, & startY);

        int xppu1, yppu1, xppu2, yppu2;

        win->wxGenericTreeCtrl::GetScrollPixelsPerUnit(& xppu1, & yppu1);

        scrolledWindow->GetScrollPixelsPerUnit(& xppu2, & yppu2);

        dc.SetDeviceOrigin( -startX * xppu1, -startY * yppu2 );

        // dc.SetUserScale( win->GetScaleX(), win->GetScaleY() );

    }

}

// Scroll to the given line (in scroll units where each unit is

// the height of an item)

void wxRemotelyScrolledTreeCtrl::ScrollToLine(int posHoriz, int posVert)

{

#ifdef __WXMSW__

    if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))

    {

        UINT sbCode = SB_THUMBPOSITION;

        HWND vertScrollBar = 0;

        MSWDefWindowProc((WXUINT) WM_VSCROLL, MAKELONG(sbCode, posVert), (WXHWND) vertScrollBar);

    }

    else

#endif

    {

        wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;

        win->Refresh();

        /* Doesn't work yet because scrolling is ignored by Scroll

        int xppu, yppu;

        wxScrolledWindow* scrolledWindow = GetScrolledWindow();

        if (scrolledWindow)

        {

        scrolledWindow->GetScrollPixelsPerUnit(& xppu, & yppu);

        win->Scroll(-1, posVert*yppu);

        }

        */

    }

}

void wxRemotelyScrolledTreeCtrl::OnSize(wxSizeEvent& event)

{

    HideVScrollbar();

    AdjustRemoteScrollbars();

    event.Skip();

}

void wxRemotelyScrolledTreeCtrl::OnExpand(wxTreeEvent& event)

{

    AdjustRemoteScrollbars();

    event.Skip();

    // If we don't have this, we get some bits of lines still remaining

    if (event.GetEventType() == wxEVT_COMMAND_TREE_ITEM_COLLAPSED)

        Refresh();

    // Pass on the event

    if (m_companionWindow)

        m_companionWindow->GetEventHandler()->ProcessEvent(event);

}

// Adjust the containing wxScrolledWindow's scrollbars appropriately

void wxRemotelyScrolledTreeCtrl::AdjustRemoteScrollbars()

{

    if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))

    {

        // This is for the generic tree control.

        // It calls SetScrollbars which has been overridden

        // to adjust the parent scrolled window vertical

        // scrollbar.

        ((wxGenericTreeCtrl*) this)->AdjustMyScrollbars();

        return;

    }

    else

    {

        // This is for the wxMSW tree control

        ecScrolledWindow* scrolledWindow = GetScrolledWindow();

        if (scrolledWindow)

        {

            wxRect itemRect;

            if (GetBoundingRect(GetRootItem(), itemRect))

            {

                // Actually, the real height seems to be 1 less than reported

                // (e.g. 16 instead of 16)

                int itemHeight = itemRect.GetHeight() - 1;

                int w, h;

                GetClientSize(&w, &h);

                wxRect rect(0, 0, 0, 0);

                CalcTreeSize(rect);

                double f = ((double) (rect.GetHeight()) / (double) itemHeight)  ;

                int treeViewHeight = (int) ceil(f);

                int scrollPixelsPerLine = itemHeight;

                int scrollPos = - (itemRect.y / itemHeight);

                scrolledWindow->SetScrollbars(0, scrollPixelsPerLine, 0, treeViewHeight, 0, scrollPos);

                // Ensure that when a scrollbar becomes hidden or visible,

                // the contained window sizes are right.

                // Problem: this is called too early (?)

                wxSizeEvent event(scrolledWindow->GetSize(), scrolledWindow->GetId());

                scrolledWindow->GetEventHandler()->ProcessEvent(event);

            }

        }

    }

}

// Calculate the area that contains both rectangles

static wxRect CombineRectangles(const wxRect& rect1, const wxRect& rect2)

{

    wxRect rect;

    int right1 = rect1.GetRight();

    int bottom1 = rect1.GetBottom();

    int right2 = rect2.GetRight();

    int bottom2 = rect2.GetBottom();

    wxPoint topLeft = wxPoint(wxMin(rect1.x, rect2.x), wxMin(rect1.y, rect2.y));

    wxPoint bottomRight = wxPoint(wxMax(right1, right2), wxMax(bottom1, bottom2));

    rect.x = topLeft.x; rect.y = topLeft.y;

    rect.SetRight(bottomRight.x);

    rect.SetBottom(bottomRight.y);

    return rect;

}

// Calculate the tree overall size so we can set the scrollbar

// correctly

// static int g_count = 0;

void wxRemotelyScrolledTreeCtrl::CalcTreeSize(wxRect& rect)

{

    //    g_count = 0;

    CalcTreeSize(GetRootItem(), rect);

}

void wxRemotelyScrolledTreeCtrl::CalcTreeSize(const wxTreeItemId& id, wxRect& rect)

{

    // More efficient implementation would be to find the last item (but how?)

    // Q: is the bounding rect relative to the top of the virtual tree workspace

    // or the top of the window? How would we convert?

    wxRect itemSize;

    if (GetBoundingRect(id, itemSize))

    {

        rect = CombineRectangles(rect, itemSize);

    }

    long cookie;

    wxTreeItemId childId = GetFirstChild(id, cookie);

    while (childId != 0)

    {

        CalcTreeSize(childId, rect);

        childId = GetNextChild(childId, cookie);

    }

}

// Find the scrolled window that contains this control

ecScrolledWindow* wxRemotelyScrolledTreeCtrl::GetScrolledWindow() const

{

    wxWindow* parent = wxWindow::GetParent();

    while (parent)

    {

        if (parent->IsKindOf(CLASSINFO(ecScrolledWindow)))

            return (ecScrolledWindow*) parent;

        parent = parent->GetParent();

    }

    return NULL;

}

void wxRemotelyScrolledTreeCtrl::OnScroll(wxScrollWinEvent& event)

{

    int orient = event.GetOrientation();

    if (orient == wxHORIZONTAL)

    {

        event.Skip();

        return;

    }

    ecScrolledWindow* scrollWin = GetScrolledWindow();

    if (!scrollWin)

        return;

    int x, y;

    scrollWin->GetViewStart(& x, & y);

    ScrollToLine(-1, y);

}

/*

* wxTreeCompanionWindow

*

* A window displaying values associated with tree control items.

*/

IMPLEMENT_CLASS(wxTreeCompanionWindow, wxWindow)

BEGIN_EVENT_TABLE(wxTreeCompanionWindow, wxWindow)

EVT_PAINT(wxTreeCompanionWindow::OnPaint)

EVT_SCROLLWIN(wxTreeCompanionWindow::OnScroll)

EVT_TREE_ITEM_EXPANDED(-1, wxTreeCompanionWindow::OnExpand)

EVT_TREE_ITEM_COLLAPSED(-1, wxTreeCompanionWindow::OnExpand)

END_EVENT_TABLE()

wxTreeCompanionWindow::wxTreeCompanionWindow(wxWindow* parent, wxWindowID id,

                                             const wxPoint& pos,

                                             const wxSize& sz,

                                             long style):

wxWindow(parent, id, pos, sz, style)

{

    m_treeCtrl = NULL;

}

void wxTreeCompanionWindow::DrawItem(wxDC& dc, wxTreeItemId id, const wxRect& rect)

{

    if (m_treeCtrl)

    {

        wxString text = m_treeCtrl->GetItemText(id);

        dc.SetTextForeground(* wxBLACK);

        dc.SetBackgroundMode(wxTRANSPARENT);

        int textW, textH;

        dc.GetTextExtent(text, & textW, & textH);

        int x = 5;

        int y = rect.GetY() + wxMax(0, (rect.GetHeight() - textH) / 2);

        dc.DrawText(text, x, y);

    }

}

void wxTreeCompanionWindow::OnPaint(wxPaintEvent& event)

{

    wxPaintDC dc(this);

    if (!m_treeCtrl)

        return;

    wxPen pen(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DLIGHT), 1, wxSOLID);

    dc.SetPen(pen);

    dc.SetBrush(* wxTRANSPARENT_BRUSH);

    wxFont font(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));

    dc.SetFont(font);

    wxSize clientSize = GetClientSize();

    wxRect itemRect;

    int cy=0;

    wxTreeItemId h, lastH;

    for(h=m_treeCtrl->GetFirstVisibleItem();h;h=m_treeCtrl->GetNextVisible(h))

    {

        if (m_treeCtrl->GetBoundingRect(h, itemRect))

        {

            cy = itemRect.GetTop();

            wxRect drawItemRect(0, cy, clientSize.x, itemRect.GetHeight());

            lastH = h;

            // Draw the actual item

            DrawItem(dc, h, drawItemRect);

            dc.DrawLine(0, cy, clientSize.x, cy);

        }

    }

    if (lastH.IsOk() && m_treeCtrl->GetBoundingRect(lastH, itemRect))

    {

        cy = itemRect.GetBottom();

        dc.DrawLine(0, cy, clientSize.x, cy);

    }

}

void wxTreeCompanionWindow::OnScroll(wxScrollWinEvent& event)

{

    int orient = event.GetOrientation();

    if (orient == wxHORIZONTAL)

    {

        event.Skip();

        return;

    }

    if (!m_treeCtrl)

        return;

    // TODO: scroll the window physically instead of just refreshing.

    Refresh(TRUE);

}

void wxTreeCompanionWindow::OnExpand(wxTreeEvent& event)

{

    // TODO: something more optimized than simply refresh the whole

    // window when the tree is expanded/collapsed. Tricky.

    Refresh();

}

/*

* wxThinSplitterWindow

*/

IMPLEMENT_CLASS(wxThinSplitterWindow, wxSplitterWindow)

BEGIN_EVENT_TABLE(wxThinSplitterWindow, wxSplitterWindow)

EVT_SIZE(wxThinSplitterWindow::OnSize)

// Not in older versions of wxWindows, unfortunately

#if 0

EVT_SPLITTER_DOUBLECLICKED(-1, wxThinSplitterWindow::OnDoubleClickSash)

#endif

END_EVENT_TABLE()

wxThinSplitterWindow::wxThinSplitterWindow(wxWindow* parent, wxWindowID id,

                                           const wxPoint& pos,

                                           const wxSize& sz,

                                           long style):

wxSplitterWindow(parent, id, pos, sz, style)

{

}

void wxThinSplitterWindow::SizeWindows()

{

    // The client size may have changed inbetween

    // the sizing of the first window and the sizing of

    // the second. So repeat SizeWindows.

    wxSplitterWindow::SizeWindows();

    wxSplitterWindow::SizeWindows();

}

// Tests for x, y over sash

bool wxThinSplitterWindow::SashHitTest(int x, int y, int tolerance)

{

    return wxSplitterWindow::SashHitTest(x, y, 4);

}

void wxThinSplitterWindow::DrawSash(wxDC& dc)

{

    if ( m_sashPosition == 0 || !m_windowTwo)

        return;

    if (GetWindowStyle() & wxSP_NOSASH)

        return;

    int w, h;

    GetClientSize(&w, &h);

    if ( m_splitMode == wxSPLIT_VERTICAL )

    {

        dc.SetPen(* m_facePen);

        dc.SetBrush(* m_faceBrush);

        int h1 = h-1;

        int y1 = 0;

        if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )

            h1 += 1; // Not sure why this is necessary...

        if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)

        {

            y1 = 2; h1 -= 3;

        }

        dc.DrawRectangle(m_sashPosition, y1, m_sashSize, h1);

    }

    else

    {

        dc.SetPen(* m_facePen);

        dc.SetBrush(* m_faceBrush);

        int w1 = w-1;

        int x1 = 0;

        if ( (GetWindowStyleFlag() & wxSP_BORDER) != wxSP_BORDER && (GetWindowStyleFlag() & wxSP_3DBORDER) != wxSP_3DBORDER )

            w1 ++;

        if ( (GetWindowStyleFlag() & wxSP_3DBORDER) == wxSP_3DBORDER)

        {

            x1 = 2; w1 -= 3;

        }

        dc.DrawRectangle(x1, m_sashPosition, w1, m_sashSize);

    }

    dc.SetPen(wxNullPen);

    dc.SetBrush(wxNullBrush);

}

void wxThinSplitterWindow::OnSize(wxSizeEvent& event)

{

    wxSplitterWindow::OnSize(event);

}

/*

* wxSplitterScrolledWindow

*/

IMPLEMENT_CLASS(wxSplitterScrolledWindow, ecScrolledWindow)

BEGIN_EVENT_TABLE(wxSplitterScrolledWindow, ecScrolledWindow)

EVT_SCROLLWIN(wxSplitterScrolledWindow::OnScroll)

EVT_SIZE(wxSplitterScrolledWindow::OnSize)

END_EVENT_TABLE()

wxSplitterScrolledWindow::wxSplitterScrolledWindow(wxWindow* parent, wxWindowID id,

                                                   const wxPoint& pos,

                                                   const wxSize& sz,

                                                   long style):

  ecScrolledWindow(parent, id, pos, sz, style)

{

}

void wxSplitterScrolledWindow::OnSize(wxSizeEvent& event)

{

    wxSize sz = GetClientSize();

    if (GetChildren().First())

    {

        ((wxWindow*) GetChildren().First()->Data())->SetSize(0, 0, sz.x, sz.y);

    }

}

void wxSplitterScrolledWindow::OnScroll(wxScrollWinEvent& event)

{

    // Ensure that events being propagated back up the window hierarchy

    // don't cause an infinite loop

    static bool inOnScroll = FALSE;

    if (inOnScroll)

    {

        event.Skip();

        return;

    }

    inOnScroll = TRUE;

    int orient = event.GetOrientation();

    int nScrollInc = CalcScrollInc(event);

    if (nScrollInc == 0)

    {

        inOnScroll = FALSE;

        return;

    }

    if (orient == wxHORIZONTAL)

    {

        inOnScroll = FALSE;

        event.Skip();

        return;

#if 0

        int newPos = m_xScrollPosition + nScrollInc;

        SetScrollPos(wxHORIZONTAL, newPos, TRUE );

#endif

    }

    else

    {

        int newPos = m_yScrollPosition + nScrollInc;

        SetScrollPos(wxVERTICAL, newPos, TRUE );

    }

    if (orient == wxHORIZONTAL)

    {

        m_xScrollPosition += nScrollInc;

    }

    else

    {

        m_yScrollPosition += nScrollInc;

    }

    // Find targets in splitter window and send the event to them

    wxNode* node = GetChildren().First();

    while (node)

    {

        wxWindow* child = (wxWindow*) node->Data();

        if (child->IsKindOf(CLASSINFO(wxSplitterWindow)))

        {

            wxSplitterWindow* splitter = (wxSplitterWindow*) child;

            if (splitter->GetWindow1())

                splitter->GetWindow1()->ProcessEvent(event);

            if (splitter->GetWindow2())

                splitter->GetWindow2()->ProcessEvent(event);

            break;

        }

        node = node->Next();

    }

#ifdef __WXMAC__

    m_targetWindow->MacUpdateImmediately() ;

#endif

    inOnScroll = FALSE;

}