Diffstat (limited to 'noncore/apps/tinykate/libkate/view/kateundohistory.cpp') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | noncore/apps/tinykate/libkate/view/kateundohistory.cpp | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/noncore/apps/tinykate/libkate/view/kateundohistory.cpp b/noncore/apps/tinykate/libkate/view/kateundohistory.cpp new file mode 100644 index 0000000..b7b9b56 --- a/dev/null +++ b/noncore/apps/tinykate/libkate/view/kateundohistory.cpp @@ -0,0 +1,271 @@ +/* + Copyright (C) 1999 Glen Parker <glenebob@nwlink.com> + Copyright (C) 2002 Joseph Wenninger <jowenn@kde.org> + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. + + -------------------------------------------------------------------- + + This implements a dialog used to display and control undo/redo history. + It uses a specialized QListBox subclass to provide a selection mechanism + that must: + 1) always have the first item selected, and + 2) maintain a contiguous multiple selection +*/ + +#include <stdio.h> + +#include <qwidget.h> +#include <qdialog.h> +#include <qlayout.h> +#include <qlabel.h> +#include <qlistbox.h> +#include <qpushbutton.h> + +#include <klocale.h> + +#include "kateview.h" + +#include "kateundohistory.h" + +///////////////////////////////////////////////////////////////////// +// UndoHistory implementation +// +UndoHistory::UndoHistory(KateView *kWrite, QWidget *parent, const char *name, bool modal, WFlags f) + : QDialog(parent, name, modal, f) +{ + this->kWrite = kWrite; + + QPushButton *btn; + QLabel *lbl; + QHBoxLayout *hLayout; + QVBoxLayout *vLayout; + + hLayout = new QHBoxLayout(this, 5, 4); + + vLayout = new QVBoxLayout(hLayout); + lbl = new QLabel(i18n("Undo List"), this); + lbUndo = new UndoListBox(this); + vLayout->addWidget(lbl); + vLayout->addWidget(lbUndo); + + vLayout = new QVBoxLayout(hLayout); + lbl = new QLabel(i18n("Redo List"), this); + lbRedo = new UndoListBox(this); + vLayout->addWidget(lbl); + vLayout->addWidget(lbRedo); + + lbUndo->setMinimumSize(QSize(150,140)); + lbRedo->setMinimumSize(QSize(150,140)); + + connect(lbUndo, SIGNAL(sigSelected(int)), this, SLOT(slotUndoSelChanged(int))); + connect(lbRedo, SIGNAL(sigSelected(int)), this, SLOT(slotRedoSelChanged(int))); + + vLayout = new QVBoxLayout(hLayout); + + btnUndo = new QPushButton(this); + btnUndo->setText(i18n("&Undo")); + btnUndo->setEnabled(false); + btnUndo->setFixedSize(btnUndo->sizeHint()); + connect(btnUndo, SIGNAL(clicked()), this, SLOT(slotUndo())); + + vLayout->addWidget(btnUndo, 0); + + btnRedo = new QPushButton(this); + btnRedo->setText(i18n("&Redo")); + btnRedo->setEnabled(false); + btnRedo->setFixedSize(btnRedo->sizeHint()); + connect(btnRedo, SIGNAL(clicked()), this, SLOT(slotRedo())); + + vLayout->addWidget(btnRedo, 0); + + btn = new QPushButton(this); + btn->setText(i18n("&Close")); + btn->setFixedSize(btn->sizeHint()); + connect(btn, SIGNAL(clicked()), this, SLOT(close())); + + vLayout->addWidget(btn, 0, AlignBottom); + + newUndo(); +} + +UndoHistory::~UndoHistory() +{} + +void UndoHistory::newUndo() +{ + QValueList<int> undoList; + QValueList<int>::Iterator it; + + // we don't want a signal storm... + disconnect(lbUndo, SIGNAL(sigSelected(int)), this, SLOT(slotUndoSelChanged(int))); + disconnect(lbRedo, SIGNAL(sigSelected(int)), this, SLOT(slotRedoSelChanged(int))); + + kWrite->undoTypeList(undoList); + + lbUndo->clear(); + + for (it = undoList.begin() ; it != undoList.end() ; it++) { + lbUndo->insertItem(i18n(kWrite->undoTypeName(*it))); + } + + kWrite->redoTypeList(undoList); + + lbRedo->clear(); + for (it = undoList.begin() ; it != undoList.end() ; it++) { + lbRedo->insertItem(i18n(kWrite->undoTypeName(*it))); + } + + connect(lbUndo, SIGNAL(sigSelected(int)), this, SLOT(slotUndoSelChanged(int))); + connect(lbRedo, SIGNAL(sigSelected(int)), this, SLOT(slotRedoSelChanged(int))); + + slotUndoSelChanged(lbUndo->selCount()); + slotRedoSelChanged(lbRedo->selCount()); +} + +void UndoHistory::slotUndo() +{ + int selCount = lbUndo->selCount(); + emit undo(selCount); + lbRedo->setSelCount(selCount); +} +void UndoHistory::slotRedo() +{ + int selCount = lbRedo->selCount(); + emit redo(selCount); + lbUndo->setSelCount(selCount); +} + +void UndoHistory::slotUndoSelChanged(int cnt) +{ + btnUndo->setEnabled(cnt > 0); +} + +void UndoHistory::slotRedoSelChanged(int cnt) +{ + btnRedo->setEnabled(cnt > 0); +} + +///////////////////////////////////////////////////////////////////// +// UndoListBox implementation +// +UndoListBox::UndoListBox(QWidget *parent, const char *name, WFlags f) + : QListBox(parent, name, f) +{ + _selCount = 0; + setSelectionMode(Extended); + connect(this, SIGNAL(highlighted(int)), this, SLOT(_slotSelectionChanged())); + connect(this, SIGNAL(selectionChanged()), this, SLOT(_slotSelectionChanged())); +} + +UndoListBox::~UndoListBox() +{} + +void UndoListBox::insertItem (const QString &text, int index) +{ + bool sig = false; + + if (count() == 0) + sig = true; + else if (index > -1) + sig = (isSelected(index)); + + QListBox::insertItem(text, index); + + if (sig) + _slotSelectionChanged(); +} + +void UndoListBox::removeItem (int index) +{ + bool sig; + + if (count() == 1) + sig = true; + else if (index == -1) + sig = (isSelected(count() - 1)); + else + sig = (isSelected(index)); + + QListBox::removeItem(index); + + if (sig) + _slotSelectionChanged(); +} + +void UndoListBox::clear() +{ + bool sig = (count() > 0); + + QListBox::clear(); + + if (sig) + _slotSelectionChanged(); +} + +int UndoListBox::selCount() +{ + return _selCount; +} + +void UndoListBox::setSelCount(int count) +{ + if (count == _selCount) + return; + + if (count < 1 || count > (int)this->count()) + return; + + setCurrentItem(count - 1); +} + +// make sure the first item is selected, and that there are no holes +void UndoListBox::_slotSelectionChanged() +{ + int count = this->count(); + + if (! count) { + if (_selCount != 0) { + _selCount = 0; + emit sigSelected(_selCount); + } + return; + } + + if (currentItem() < 0) + setCurrentItem(0); + + int i; + int currItem = currentItem(); + int max = (currItem+1 > _selCount ? currItem+1 : _selCount); + + for (i = 0 ; i < max ; i++) { + if (i > currItem) { + if (isSelected(i)) { + setSelected(i, false); + } + } else { + if (! isSelected(i)) { + setSelected(i, true); + } + } + } + + if (_selCount != currItem + 1) { + _selCount = currItem + 1; + emit sigSelected(_selCount); + } +} |