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tdegraphics/kolourpaint/kpviewmanager.cpp

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/*
Copyright (c) 2003,2004,2005 Clarence Dang <dang@kde.org>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define DEBUG_KP_VIEW_MANAGER 0
#include <kpviewmanager.h>
#include <tqapplication.h>
#include <tqtimer.h>
#include <kdebug.h>
#include <kpdefs.h>
#include <kpdocument.h>
#include <kpmainwindow.h>
#include <kpselection.h>
#include <kptemppixmap.h>
#include <kptool.h>
#include <kpview.h>
kpViewManager::kpViewManager (kpMainWindow *mainWindow)
: m_textCursorBlinkTimer (0),
m_textCursorRow (-1),
m_textCursorCol (-1),
m_textCursorBlinkState (true),
m_mainWindow (mainWindow),
m_tempPixmap (0),
m_viewUnderCursor (0),
m_selectionBorderVisible (false),
m_selectionBorderFinished (false)
{
m_queueUpdatesCounter = m_fastUpdatesCounter = 0;
}
// private
kpDocument *kpViewManager::document () const
{
return m_mainWindow ? m_mainWindow->document () : 0;
}
kpViewManager::~kpViewManager ()
{
unregisterAllViews ();
delete m_tempPixmap; m_tempPixmap = 0;
}
void kpViewManager::registerView (kpView *view)
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "kpViewManager::registerView (" << view << ")" << endl;
#endif
if (view && m_views.findRef (view) < 0)
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "\tadded view" << endl;
#endif
view->setCursor (m_cursor);
m_views.append (view);
}
else
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "\tignored register view attempt" << endl;
#endif
}
}
void kpViewManager::unregisterView (kpView *view)
{
if (view)
{
if (view == m_viewUnderCursor)
m_viewUnderCursor = 0;
view->unsetCursor ();
m_views.removeRef (view);
}
}
void kpViewManager::unregisterAllViews ()
{
// no autoDelete
m_views.clear ();
}
// public
const kpTempPixmap *kpViewManager::tempPixmap () const
{
return m_tempPixmap;
}
// public
void kpViewManager::setTempPixmap (const kpTempPixmap &tempPixmap)
{
#if DEBUG_KP_VIEW_MANAGER
kdDebug () << "kpViewManager::setTempPixmap(isBrush="
<< tempPixmap.isBrush ()
<< ",topLeft=" << tempPixmap.topLeft ()
<< ",pixmap.rect=" << tempPixmap.pixmap ().rect ()
<< ")" << endl;
#endif
TQRect oldRect;
if (m_tempPixmap)
{
oldRect = m_tempPixmap->rect ();
delete m_tempPixmap;
m_tempPixmap = 0;
}
m_tempPixmap = new kpTempPixmap (tempPixmap);
setQueueUpdates ();
if (oldRect.isValid ())
updateViews (oldRect);
updateViews (m_tempPixmap->rect ());
restoreQueueUpdates ();
}
// public
void kpViewManager::invalidateTempPixmap ()
{
if (!m_tempPixmap)
return;
TQRect oldRect = m_tempPixmap->rect ();
delete m_tempPixmap;
m_tempPixmap = 0;
updateViews (oldRect);
}
// public
bool kpViewManager::selectionBorderVisible () const
{
return m_selectionBorderVisible;
}
// public
void kpViewManager::setSelectionBorderVisible (bool yes)
{
if (m_selectionBorderVisible == yes)
return;
m_selectionBorderVisible = yes;
if (document () && document ()->selection ())
updateViews (document ()->selection ()->boundingRect ());
}
// public
bool kpViewManager::selectionBorderFinished () const
{
return m_selectionBorderFinished;
}
// public
void kpViewManager::setSelectionBorderFinished (bool yes)
{
if (m_selectionBorderFinished == yes)
return;
m_selectionBorderFinished = yes;
if (document () && document ()->selection ())
updateViews (document ()->selection ()->boundingRect ());
}
bool kpViewManager::textCursorEnabled () const
{
return (bool) m_textCursorBlinkTimer;
}
void kpViewManager::setTextCursorEnabled (bool yes)
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "kpViewManager::setTextCursorEnabled(" << yes << ")" << endl;
#endif
if (yes == textCursorEnabled ())
return;
delete m_textCursorBlinkTimer;
m_textCursorBlinkTimer = 0;
setFastUpdates ();
setQueueUpdates ();
m_textCursorBlinkState = true;
if (yes)
{
m_textCursorBlinkTimer = new TQTimer (this);
connect (m_textCursorBlinkTimer, TQT_SIGNAL (timeout ()),
this, TQT_SLOT (slotTextCursorBlink ()));
slotTextCursorBlink ();
}
// TODO: What if !yes - shouldn't it clear the cursor?
restoreQueueUpdates ();
restoreFastUpdates ();
}
int kpViewManager::textCursorRow () const
{
bool handledErrors = false;
if (m_mainWindow)
{
kpDocument *doc = m_mainWindow->document ();
if (doc)
{
kpSelection *sel = doc->selection ();
if (sel && sel->isText ())
{
if (m_textCursorRow >= (int) sel->textLines ().size ())
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "kpViewManager::textCursorRow() row="
<< m_textCursorRow
<< endl;
#endif
(const_cast <kpViewManager *> (this))->m_textCursorRow =
sel->textLines ().size () - 1;
}
handledErrors = true;
}
}
}
if (!handledErrors)
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "kpViewManager::textCursorRow() no mw, doc or text sel" << endl;
#endif
(const_cast <kpViewManager *> (this))->m_textCursorRow = -1;
}
return m_textCursorRow;
}
int kpViewManager::textCursorCol () const
{
int row = textCursorRow ();
if (row < 0)
return -1;
bool handledErrors = false;
if (m_mainWindow)
{
kpDocument *doc = m_mainWindow->document ();
if (doc)
{
kpSelection *sel = doc->selection ();
if (sel && sel->isText ())
{
if (m_textCursorCol > (int) sel->textLines () [row].length ())
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "kpViewManager::textCursorRow() col="
<< m_textCursorCol
<< endl;
#endif
(const_cast <kpViewManager *> (this))->m_textCursorCol =
sel->textLines () [row].length ();
}
handledErrors = true;
}
}
}
if (!handledErrors)
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "kpViewManager::textCursorCol() no mw, doc or text sel" << endl;
#endif
(const_cast <kpViewManager *> (this))->m_textCursorCol = -1;
}
return m_textCursorCol;
}
void kpViewManager::setTextCursorPosition (int row, int col, bool isUpdateMicroFocusHint)
{
if (row == m_textCursorRow && col == m_textCursorCol)
return;
setFastUpdates ();
setQueueUpdates ();
m_textCursorBlinkState = false;
updateTextCursor ();
m_textCursorRow = row;
m_textCursorCol = col;
m_textCursorBlinkState = true;
updateTextCursor ();
restoreQueueUpdates ();
restoreFastUpdates ();
if (isUpdateMicroFocusHint)
{
kpDocument *doc = m_mainWindow->document ();
if (!doc)
return;
kpSelection *sel = doc->selection ();
if (!sel || !sel->isText ())
return;
if (m_viewUnderCursor)
{
// TODO: Fix code duplication: kpViewManager::{setTextCursorPosition,updateTextCursor}() & kpView::paintEventDrawSelection()
TQPoint topLeft = sel->pointForTextRowCol (m_textCursorRow, m_textCursorCol);
if (topLeft != KP_INVALID_POINT)
{
// TODO: I think you need to consider zooming e.g. try editing
// text at 800% or with focus set to the thumbnail.
// kpSelection/kpDocument works fully in unzoomed
// coordinates unlike the view (which is zoomed and can
// change size).
//
// To fix it here, I think you should call
// m_viewUnderCursor->transformDocToView(TQRect). However,
// the rest of the InputMethod support still needs to
// audited for this.
//
// [Bug #27]
m_viewUnderCursor->updateMicroFocusHint(TQRect (topLeft.x (), topLeft.y (), 1, sel->textStyle ().fontMetrics ().height ()));
}
}
}
}
bool kpViewManager::textCursorBlinkState () const
{
return m_textCursorBlinkState;
}
void kpViewManager::setTextCursorBlinkState (bool on)
{
if (on == m_textCursorBlinkState)
return;
m_textCursorBlinkState = on;
updateTextCursor ();
}
// protected
void kpViewManager::updateTextCursor ()
{
#if DEBUG_KP_VIEW_MANAGER && 0
kdDebug () << "kpViewManager::updateTextCursor()" << endl;
#endif
if (!m_mainWindow)
return;
kpDocument *doc = m_mainWindow->document ();
if (!doc)
return;
kpSelection *sel = doc->selection ();
if (!sel || !sel->isText ())
return;
// TODO: Fix code duplication: kpViewManager::{setTextCursorPosition,updateTextCursor}() & kpView::paintEventDrawSelection()
TQPoint topLeft = sel->pointForTextRowCol (m_textCursorRow, m_textCursorCol);
if (topLeft != KP_INVALID_POINT)
{
setFastUpdates ();
updateViews (TQRect (topLeft.x (), topLeft.y (), 1, sel->textStyle ().fontMetrics ().height ()));
restoreFastUpdates ();
}
}
// protected slot
void kpViewManager::slotTextCursorBlink ()
{
#if DEBUG_KP_VIEW_MANAGER && 0
kdDebug () << "kpViewManager::slotTextCursorBlink() cursorBlinkState="
<< m_textCursorBlinkState << endl;
#endif
if (m_textCursorBlinkTimer)
{
m_textCursorBlinkTimer->start (TQApplication::cursorFlashTime () / 2,
true/*single shot*/);
}
updateTextCursor ();
m_textCursorBlinkState = !m_textCursorBlinkState;
}
void kpViewManager::setCursor (const TQCursor &cursor)
{
for (TQPtrList <kpView>::const_iterator it = m_views.begin ();
it != m_views.end ();
it++)
{
(*it)->setCursor (cursor);
}
m_cursor = cursor;
}
void kpViewManager::unsetCursor ()
{
for (TQPtrList <kpView>::const_iterator it = m_views.begin ();
it != m_views.end ();
it++)
{
(*it)->unsetCursor ();
}
m_cursor = TQCursor ();
}
kpView *kpViewManager::viewUnderCursor (bool usingTQt) const
{
if (!usingTQt)
{
kpViewManager *nonConstThis = const_cast <kpViewManager *> (this);
if (m_viewUnderCursor && nonConstThis->m_views.findRef (m_viewUnderCursor) < 0)
{
kdError () << "kpViewManager::viewUnderCursor(): invalid view" << endl;
nonConstThis->m_viewUnderCursor = 0;
}
return m_viewUnderCursor;
}
else
{
for (TQPtrList <kpView>::const_iterator it = m_views.begin ();
it != m_views.end ();
it++)
{
if ((*it)->hasMouse ())
return (*it);
}
return 0;
}
}
void kpViewManager::setViewUnderCursor (kpView *view)
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "kpViewManager::setViewUnderCursor ("
<< (view ? view->name () : "(none)") << ")"
<< " old=" << (m_viewUnderCursor ? m_viewUnderCursor->name () : "(none)")
<< endl;
#endif
if (view == m_viewUnderCursor)
return;
m_viewUnderCursor = view;
if (!m_viewUnderCursor)
{
// Hide the brush if the mouse cursor just left the view
if (m_tempPixmap && m_tempPixmap->isBrush ())
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "\thiding brush pixmap since cursor left view" << endl;
#endif
updateViews (m_tempPixmap->rect ());
}
}
else
{
if (m_mainWindow && m_mainWindow->tool ())
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "\tnotify tool that something changed below cursor" << endl;
#endif
m_mainWindow->tool ()->somethingBelowTheCursorChanged ();
}
}
}
// public
kpView *kpViewManager::activeView () const
{
for (TQPtrList <kpView>::const_iterator it = m_views.begin ();
it != m_views.end ();
it++)
{
if ((*it)->isActiveWindow ())
return (*it);
}
return 0;
}
// public
bool kpViewManager::queueUpdates () const
{
return (m_queueUpdatesCounter > 0);
}
// public
void kpViewManager::setQueueUpdates ()
{
m_queueUpdatesCounter++;
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "kpViewManager::setQueueUpdates() counter="
<< m_queueUpdatesCounter << endl;
#endif
}
// public
void kpViewManager::restoreQueueUpdates ()
{
m_queueUpdatesCounter--;
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "kpViewManager::restoreQueueUpdates() counter="
<< m_queueUpdatesCounter << endl;
#endif
if (m_queueUpdatesCounter < 0)
{
kdError () << "kpViewManager::restoreQueueUpdates() counter="
<< m_queueUpdatesCounter;
}
if (m_queueUpdatesCounter <= 0)
{
for (TQPtrList <kpView>::const_iterator it = m_views.begin ();
it != m_views.end ();
it++)
{
(*it)->updateQueuedArea ();
}
}
}
// public
bool kpViewManager::fastUpdates () const
{
return (m_fastUpdatesCounter > 0);
}
// public
void kpViewManager::setFastUpdates ()
{
m_fastUpdatesCounter++;
#if DEBUG_KP_VIEW_MANAGER && 0
kdDebug () << "kpViewManager::setFastUpdates() counter="
<< m_fastUpdatesCounter << endl;
#endif
}
// public
void kpViewManager::restoreFastUpdates ()
{
m_fastUpdatesCounter--;
#if DEBUG_KP_VIEW_MANAGER && 0
kdDebug () << "kpViewManager::restoreFastUpdates() counter="
<< m_fastUpdatesCounter << endl;
#endif
if (m_fastUpdatesCounter < 0)
{
kdError () << "kpViewManager::restoreFastUpdates() counter="
<< m_fastUpdatesCounter;
}
}
void kpViewManager::updateView (kpView *v)
{
updateView (v, TQRect (0, 0, v->width (), v->height ()));
}
void kpViewManager::updateView (kpView *v, const TQRect &viewRect)
{
if (!queueUpdates ())
{
if (fastUpdates ())
v->tqrepaint (viewRect, false/*no erase*/);
else
v->update (viewRect);
}
else
v->addToQueuedArea (viewRect);
}
void kpViewManager::updateView (kpView *v, int x, int y, int w, int h)
{
updateView (v, TQRect (x, y, w, h));
}
void kpViewManager::updateView (kpView *v, const TQRegion &viewRegion)
{
if (!queueUpdates ())
{
if (fastUpdates ())
v->tqrepaint (viewRegion, false/*no erase*/);
else
v->update (viewRegion.boundingRect ());
}
else
v->addToQueuedArea (viewRegion);
}
void kpViewManager::updateViewRectangleEdges (kpView *v, const TQRect &viewRect)
{
if (viewRect.height () <= 0 || viewRect.width () <= 0)
return;
// Top line
updateView (v, TQRect (viewRect.x (), viewRect.y (),
viewRect.width (), 1));
if (viewRect.height () >= 2)
{
// Bottom line
updateView (v, TQRect (viewRect.x (), viewRect.bottom (),
viewRect.width (), 1));
if (viewRect.height () > 2)
{
// Left line
updateView (v, TQRect (viewRect.x (), viewRect.y () + 1,
1, viewRect.height () - 2));
if (viewRect.width () >= 2)
{
// Right line
updateView (v, TQRect (viewRect.right (), viewRect.y () + 1,
1, viewRect.height () - 2));
}
}
}
}
void kpViewManager::updateViews ()
{
kpDocument *doc = document ();
if (doc)
updateViews (TQRect (0, 0, doc->width (), doc->height ()));
}
void kpViewManager::updateViews (const TQRect &docRect)
{
#if DEBUG_KP_VIEW_MANAGER && 0
kdDebug () << "kpViewManager::updateViews (" << docRect << ")" << endl;
#endif
for (TQPtrList <kpView>::const_iterator it = m_views.begin ();
it != m_views.end ();
it++)
{
kpView *view = *it;
#if DEBUG_KP_VIEW_MANAGER && 0
kdDebug () << "\tupdating view " << view->name () << endl;
#endif
if (view->zoomLevelX () % 100 == 0 && view->zoomLevelY () % 100 == 0)
{
#if DEBUG_KP_VIEW_MANAGER && 0
kdDebug () << "\t\tviewRect=" << view->transformDocToView (docRect) << endl;
#endif
updateView (view, view->transformDocToView (docRect));
}
else
{
TQRect viewRect = view->transformDocToView (docRect);
int diff = tqRound (double (TQMAX (view->zoomLevelX (), view->zoomLevelY ())) / 100.0) + 1;
TQRect newRect = TQRect (viewRect.x () - diff,
viewRect.y () - diff,
viewRect.width () + 2 * diff,
viewRect.height () + 2 * diff)
.intersect (TQRect (0, 0, view->width (), view->height ()));
#if DEBUG_KP_VIEW_MANAGER && 0
kdDebug () << "\t\tviewRect (+compensate)=" << newRect << endl;
#endif
updateView (view, newRect);
}
}
}
void kpViewManager::updateViews (int x, int y, int w, int h)
{
updateViews (TQRect (x, y, w, h));
}
void kpViewManager::adjustViewsToEnvironment ()
{
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "kpViewManager::adjustViewsToEnvironment()"
<< " numViews=" << m_views.count ()
<< endl;
#endif
for (TQPtrList <kpView>::const_iterator it = m_views.begin ();
it != m_views.end ();
it++)
{
kpView *view = *it;
#if DEBUG_KP_VIEW_MANAGER && 1
kdDebug () << "\tview: " << view->name ()
<< endl;
#endif
view->adjustToEnvironment ();
}
}
#include <kpviewmanager.moc>