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Diffstat (limited to 'kolourpaint/kpviewmanager.cpp')
| -rw-r--r-- | kolourpaint/kpviewmanager.cpp | 766 |
1 files changed, 766 insertions, 0 deletions
diff --git a/kolourpaint/kpviewmanager.cpp b/kolourpaint/kpviewmanager.cpp new file mode 100644 index 00000000..d649f359 --- /dev/null +++ b/kolourpaint/kpviewmanager.cpp @@ -0,0 +1,766 @@ + +/* + 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 <qapplication.h> +#include <qtimer.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 + + QRect 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; + + QRect 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 QTimer (this); + connect (m_textCursorBlinkTimer, SIGNAL (timeout ()), + this, 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() + QPoint 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(QRect). However, + // the rest of the InputMethod support still needs to + // audited for this. + // + // [Bug #27] + m_viewUnderCursor->updateMicroFocusHint(QRect (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() + QPoint topLeft = sel->pointForTextRowCol (m_textCursorRow, m_textCursorCol); + if (topLeft != KP_INVALID_POINT) + { + setFastUpdates (); + updateViews (QRect (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 (QApplication::cursorFlashTime () / 2, + true/*single shot*/); + } + + updateTextCursor (); + m_textCursorBlinkState = !m_textCursorBlinkState; +} + + +void kpViewManager::setCursor (const QCursor &cursor) +{ + for (QPtrList <kpView>::const_iterator it = m_views.begin (); + it != m_views.end (); + it++) + { + (*it)->setCursor (cursor); + } + + m_cursor = cursor; +} + +void kpViewManager::unsetCursor () +{ + for (QPtrList <kpView>::const_iterator it = m_views.begin (); + it != m_views.end (); + it++) + { + (*it)->unsetCursor (); + } + + m_cursor = QCursor (); +} + + +kpView *kpViewManager::viewUnderCursor (bool usingQt) const +{ + if (!usingQt) + { + 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 (QPtrList <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 (QPtrList <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 (QPtrList <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, QRect (0, 0, v->width (), v->height ())); +} + +void kpViewManager::updateView (kpView *v, const QRect &viewRect) +{ + if (!queueUpdates ()) + { + if (fastUpdates ()) + v->repaint (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, QRect (x, y, w, h)); +} + +void kpViewManager::updateView (kpView *v, const QRegion &viewRegion) +{ + if (!queueUpdates ()) + { + if (fastUpdates ()) + v->repaint (viewRegion, false/*no erase*/); + else + v->update (viewRegion.boundingRect ()); + } + else + v->addToQueuedArea (viewRegion); +} + +void kpViewManager::updateViewRectangleEdges (kpView *v, const QRect &viewRect) +{ + if (viewRect.height () <= 0 || viewRect.width () <= 0) + return; + + // Top line + updateView (v, QRect (viewRect.x (), viewRect.y (), + viewRect.width (), 1)); + + if (viewRect.height () >= 2) + { + // Bottom line + updateView (v, QRect (viewRect.x (), viewRect.bottom (), + viewRect.width (), 1)); + + if (viewRect.height () > 2) + { + // Left line + updateView (v, QRect (viewRect.x (), viewRect.y () + 1, + 1, viewRect.height () - 2)); + + if (viewRect.width () >= 2) + { + // Right line + updateView (v, QRect (viewRect.right (), viewRect.y () + 1, + 1, viewRect.height () - 2)); + } + } + } +} + + +void kpViewManager::updateViews () +{ + kpDocument *doc = document (); + if (doc) + updateViews (QRect (0, 0, doc->width (), doc->height ())); +} + +void kpViewManager::updateViews (const QRect &docRect) +{ +#if DEBUG_KP_VIEW_MANAGER && 0 + kdDebug () << "kpViewManager::updateViews (" << docRect << ")" << endl; +#endif + + for (QPtrList <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 + { + QRect viewRect = view->transformDocToView (docRect); + + int diff = qRound (double (QMAX (view->zoomLevelX (), view->zoomLevelY ())) / 100.0) + 1; + + QRect newRect = QRect (viewRect.x () - diff, + viewRect.y () - diff, + viewRect.width () + 2 * diff, + viewRect.height () + 2 * diff) + .intersect (QRect (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 (QRect (x, y, w, h)); +} + + +void kpViewManager::adjustViewsToEnvironment () +{ +#if DEBUG_KP_VIEW_MANAGER && 1 + kdDebug () << "kpViewManager::adjustViewsToEnvironment()" + << " numViews=" << m_views.count () + << endl; +#endif + for (QPtrList <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> + |