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splittree.cpp
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C/C++ Source or Header
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2002-03-05
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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 1.20 2002/02/28 18:00:33 JS Exp $
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#ifdef __GNUG__
#pragma implementation "splittree.h"
#endif
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
// for all others, include the necessary headers (this file is usually all you
// need because it includes almost all "standard" wxWindows headers)
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#ifdef __WXMSW__
#include <windows.h>
#include "wx/msw/winundef.h"
#endif
#include "wx/gizmos/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_PAINT(wxRemotelyScrolledTreeCtrl::OnPaint)
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 & ~wxTR_ROW_LINES)
{
m_companionWindow = NULL;
// We draw the row lines ourself so they match what's done
// by the companion window. That is why the flag is turned
// off above, so wxGenericTreeCtrl doesn't draw them in a
// different colour.
m_drawRowLines = (style & wxTR_ROW_LINES) != 0;
}
wxRemotelyScrolledTreeCtrl::~wxRemotelyScrolledTreeCtrl()
{
}
void wxRemotelyScrolledTreeCtrl::HideVScrollbar()
{
#if defined(__WXMSW__)
#if USE_GENERIC_TREECTRL
if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
#endif
{
::ShowScrollBar((HWND) GetHWND(), SB_VERT, FALSE);
}
#if USE_GENERIC_TREECTRL
else
{
// Implicit in overriding SetScrollbars
}
#endif
#endif
}
// 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 USE_GENERIC_TREECTRL || !defined(__WXMSW__)
if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
{
wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
win->wxGenericTreeCtrl::SetScrollbars(pixelsPerUnitX, 0, noUnitsX, 0, xPos, 0, noRefresh);
wxScrolledWindow* scrolledWindow = GetScrolledWindow();
if (scrolledWindow)
{
scrolledWindow->SetScrollbars(0, pixelsPerUnitY, 0, noUnitsY, 0, yPos, noRefresh);
}
}
#endif
}
// In case we're using the generic tree control.
int wxRemotelyScrolledTreeCtrl::GetScrollPos(int orient) const
{
wxScrolledWindow* scrolledWindow = GetScrolledWindow();
#if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
{
wxGenericTreeCtrl* win = (wxGenericTreeCtrl*) this;
if (orient == wxHORIZONTAL)
return win->wxGenericTreeCtrl::GetScrollPos(orient);
else
{
return scrolledWindow->GetScrollPos(orient);
}
}
#endif
return 0;
}
// In case we're using the generic tree control.
// Get the view start
void wxRemotelyScrolledTreeCtrl::GetViewStart(int *x, int *y) const
{
wxScrolledWindow* scrolledWindow = GetScrolledWindow();
#if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
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
#endif
{
// 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 USE_GENERIC_TREECTRL || !defined(__WXMSW__)
if (IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
{
wxScrolledWindow* 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() );
}
#endif
}
// 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 USE_GENERIC_TREECTRL
if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
#endif
{
UINT sbCode = SB_THUMBPOSITION;
HWND vertScrollBar = 0;
MSWDefWindowProc((WXUINT) WM_VSCROLL, MAKELONG(sbCode, posVert), (WXHWND) vertScrollBar);
}
#if USE_GENERIC_TREECTRL
else
#endif
#endif
#if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
{
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);
}
*/
}
#endif
}
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);
}
void wxRemotelyScrolledTreeCtrl::OnPaint(wxPaintEvent& event)
{
wxPaintDC dc(this);
wxTreeCtrl::OnPaint(event);
if (! m_drawRowLines)
return;
// Reset the device origin since it may have been set
dc.SetDeviceOrigin(0, 0);
wxPen pen(wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT), 1, wxSOLID);
dc.SetPen(pen);
dc.SetBrush(* wxTRANSPARENT_BRUSH);
wxSize clientSize = GetClientSize();
wxRect itemRect;
int cy=0;
wxTreeItemId h, lastH;
for(h=GetFirstVisibleItem();h;h=GetNextVisible(h))
{
if (GetBoundingRect(h, itemRect))
{
cy = itemRect.GetTop();
dc.DrawLine(0, cy, clientSize.x, cy);
lastH = h;
}
}
if (lastH.IsOk() && GetBoundingRect(lastH, itemRect))
{
cy = itemRect.GetBottom();
dc.DrawLine(0, cy, clientSize.x, cy);
}
}
// Adjust the containing wxScrolledWindow's scrollbars appropriately
void wxRemotelyScrolledTreeCtrl::AdjustRemoteScrollbars()
{
#if USE_GENERIC_TREECTRL || !defined(__WXMSW__)
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
#endif
{
// This is for the wxMSW tree control
wxScrolledWindow* 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
void wxRemotelyScrolledTreeCtrl::CalcTreeSize(wxRect& rect)
{
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
wxScrolledWindow* wxRemotelyScrolledTreeCtrl::GetScrolledWindow() const
{
wxWindow* parent = wxWindow::GetParent();
while (parent)
{
if (parent->IsKindOf(CLASSINFO(wxScrolledWindow)))
return (wxScrolledWindow*) parent;
parent = parent->GetParent();
}
return NULL;
}
void wxRemotelyScrolledTreeCtrl::OnScroll(wxScrollWinEvent& event)
{
int orient = event.GetOrientation();
if (orient == wxHORIZONTAL)
{
event.Skip();
return;
}
wxScrolledWindow* 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)
{
// TEST CODE
#if 1
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);
}
#endif
}
void wxTreeCompanionWindow::OnPaint(wxPaintEvent& event)
{
wxPaintDC dc(this);
if (!m_treeCtrl)
return;
wxPen pen(wxSystemSettings::GetColour(wxSYS_COLOUR_3DLIGHT), 1, wxSOLID);
dc.SetPen(pen);
dc.SetBrush(* wxTRANSPARENT_BRUSH);
wxFont font(wxSystemSettings::GetFont(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)
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, wxScrolledWindow)
BEGIN_EVENT_TABLE(wxSplitterScrolledWindow, wxScrolledWindow)
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):
wxScrolledWindow(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;
}