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Diffstat (limited to 'src/gui/widgets/qcombobox_p.h')
| -rw-r--r-- | src/gui/widgets/qcombobox_p.h | 410 |
1 files changed, 410 insertions, 0 deletions
diff --git a/src/gui/widgets/qcombobox_p.h b/src/gui/widgets/qcombobox_p.h new file mode 100644 index 0000000..f1203dc --- /dev/null +++ b/src/gui/widgets/qcombobox_p.h @@ -0,0 +1,410 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QCOMBOBOX_P_H +#define QCOMBOBOX_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include "QtGui/qcombobox.h" + +#ifndef QT_NO_COMBOBOX +#include "QtGui/qabstractslider.h" +#include "QtGui/qapplication.h" +#include "QtGui/qitemdelegate.h" +#include "QtGui/qstandarditemmodel.h" +#include "QtGui/qlineedit.h" +#include "QtGui/qlistview.h" +#include "QtGui/qpainter.h" +#include "QtGui/qstyle.h" +#include "QtGui/qstyleoption.h" +#include "QtCore/qhash.h" +#include "QtCore/qpair.h" +#include "QtCore/qtimer.h" +#include "private/qwidget_p.h" +#include "QtCore/qpointer.h" +#include "QtGui/qcompleter.h" +#include "QtGui/qevent.h" +#include "QtCore/qdebug.h" + +#include <limits.h> + +QT_BEGIN_NAMESPACE + +class QComboBoxListView : public QListView +{ + Q_OBJECT +public: + QComboBoxListView(QComboBox *cmb = 0) : combo(cmb) {} + +protected: + void resizeEvent(QResizeEvent *event) + { + resizeContents(viewport()->width(), contentsSize().height()); + QListView::resizeEvent(event); + } + + QStyleOptionViewItem viewOptions() const + { + QStyleOptionViewItem option = QListView::viewOptions(); + option.showDecorationSelected = true; + if (combo) + option.font = combo->font(); + return option; + } + + void paintEvent(QPaintEvent *e) + { + if (combo) { + QStyleOptionComboBox opt; + opt.initFrom(combo); + opt.editable = combo->isEditable(); + if (combo->style()->styleHint(QStyle::SH_ComboBox_Popup, &opt, combo)) { + //we paint the empty menu area to avoid having blank space that can happen when scrolling + QStyleOptionMenuItem menuOpt; + menuOpt.initFrom(this); + menuOpt.palette = palette(); + menuOpt.state = QStyle::State_None; + menuOpt.checkType = QStyleOptionMenuItem::NotCheckable; + menuOpt.menuRect = e->rect(); + menuOpt.maxIconWidth = 0; + menuOpt.tabWidth = 0; + QPainter p(viewport()); + combo->style()->drawControl(QStyle::CE_MenuEmptyArea, &menuOpt, &p, this); + } + } + QListView::paintEvent(e); + } + +private: + QComboBox *combo; +}; + + +class QStandardItemModel; + +class Q_AUTOTEST_EXPORT QComboBoxPrivateScroller : public QWidget +{ + Q_OBJECT + +public: + QComboBoxPrivateScroller(QAbstractSlider::SliderAction action, QWidget *parent) + : QWidget(parent), sliderAction(action) + { + setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed); + setAttribute(Qt::WA_NoMousePropagation); + } + QSize sizeHint() const { + return QSize(20, style()->pixelMetric(QStyle::PM_MenuScrollerHeight)); + } + +protected: + inline void stopTimer() { + timer.stop(); + } + + inline void startTimer() { + timer.start(100, this); + fast = false; + } + + void enterEvent(QEvent *) { + startTimer(); + } + + void leaveEvent(QEvent *) { + stopTimer(); + } + void timerEvent(QTimerEvent *e) { + if (e->timerId() == timer.timerId()) { + emit doScroll(sliderAction); + if (fast) { + emit doScroll(sliderAction); + emit doScroll(sliderAction); + } + } + } + void hideEvent(QHideEvent *) { + stopTimer(); + } + + void mouseMoveEvent(QMouseEvent *e) + { + // Enable fast scrolling if the cursor is directly above or below the popup. + const int mouseX = e->pos().x(); + const int mouseY = e->pos().y(); + const bool horizontallyInside = pos().x() < mouseX && mouseX < rect().right() + 1; + const bool verticallyOutside = (sliderAction == QAbstractSlider::SliderSingleStepAdd) ? + rect().bottom() + 1 < mouseY : mouseY < pos().y(); + + fast = horizontallyInside && verticallyOutside; + } + + void paintEvent(QPaintEvent *) { + QPainter p(this); + QStyleOptionMenuItem menuOpt; + menuOpt.init(this); + menuOpt.checkType = QStyleOptionMenuItem::NotCheckable; + menuOpt.menuRect = rect(); + menuOpt.maxIconWidth = 0; + menuOpt.tabWidth = 0; + menuOpt.menuItemType = QStyleOptionMenuItem::Scroller; + if (sliderAction == QAbstractSlider::SliderSingleStepAdd) + menuOpt.state |= QStyle::State_DownArrow; + p.eraseRect(rect()); + style()->drawControl(QStyle::CE_MenuScroller, &menuOpt, &p); + } + +Q_SIGNALS: + void doScroll(int action); + +private: + QAbstractSlider::SliderAction sliderAction; + QBasicTimer timer; + bool fast; +}; + +class Q_AUTOTEST_EXPORT QComboBoxPrivateContainer : public QFrame +{ + Q_OBJECT + +public: + QComboBoxPrivateContainer(QAbstractItemView *itemView, QComboBox *parent); + QAbstractItemView *itemView() const; + void setItemView(QAbstractItemView *itemView); + int spacing() const; + void updateTopBottomMargin(); + + QTimer blockMouseReleaseTimer; + QBasicTimer adjustSizeTimer; + QPoint initialClickPosition; + +public Q_SLOTS: + void scrollItemView(int action); + void updateScrollers(); + void setCurrentIndex(const QModelIndex &index); + void viewDestroyed(); + +protected: + void changeEvent(QEvent *e); + bool eventFilter(QObject *o, QEvent *e); + void mousePressEvent(QMouseEvent *e); + void mouseReleaseEvent(QMouseEvent *e); + void showEvent(QShowEvent *e); + void hideEvent(QHideEvent *e); + void timerEvent(QTimerEvent *timerEvent); + void leaveEvent(QEvent *e); + void resizeEvent(QResizeEvent *e); + QStyleOptionComboBox comboStyleOption() const; + +Q_SIGNALS: + void itemSelected(const QModelIndex &); + void resetButton(); + +private: + QComboBox *combo; + QAbstractItemView *view; + QComboBoxPrivateScroller *top; + QComboBoxPrivateScroller *bottom; +}; + +class QComboMenuDelegate : public QAbstractItemDelegate +{ +public: + QComboMenuDelegate(QObject *parent, QComboBox *cmb) : QAbstractItemDelegate(parent), mCombo(cmb) {} + +protected: + void paint(QPainter *painter, + const QStyleOptionViewItem &option, + const QModelIndex &index) const { + QStyleOptionMenuItem opt = getStyleOption(option, index); + painter->eraseRect(option.rect); + mCombo->style()->drawControl(QStyle::CE_MenuItem, &opt, painter, mCombo); + } + QSize sizeHint(const QStyleOptionViewItem &option, + const QModelIndex &index) const { + QStyleOptionMenuItem opt = getStyleOption(option, index); + return mCombo->style()->sizeFromContents( + QStyle::CT_MenuItem, &opt, option.rect.size(), mCombo); + } + +private: + QStyleOptionMenuItem getStyleOption(const QStyleOptionViewItem &option, + const QModelIndex &index) const; + QComboBox *mCombo; +}; + +// Note that this class is intentionally not using QStyledItemDelegate +// Vista does not use the new theme for combo boxes and there might +// be other side effects from using the new class +class QComboBoxDelegate : public QItemDelegate +{ +public: + QComboBoxDelegate(QObject *parent, QComboBox *cmb) : QItemDelegate(parent), mCombo(cmb) {} + + static bool isSeparator(const QModelIndex &index) { + return index.data(Qt::AccessibleDescriptionRole).toString() == QString::fromLatin1("separator"); + } + static void setSeparator(QAbstractItemModel *model, const QModelIndex &index) { + model->setData(index, QString::fromLatin1("separator"), Qt::AccessibleDescriptionRole); + if (QStandardItemModel *m = qobject_cast<QStandardItemModel*>(model)) + if (QStandardItem *item = m->itemFromIndex(index)) + item->setFlags(item->flags() & ~(Qt::ItemIsSelectable|Qt::ItemIsEnabled)); + } + +protected: + void paint(QPainter *painter, + const QStyleOptionViewItem &option, + const QModelIndex &index) const { + if (isSeparator(index)) { + QRect rect = option.rect; + if (const QStyleOptionViewItemV3 *v3 = qstyleoption_cast<const QStyleOptionViewItemV3*>(&option)) + if (const QAbstractItemView *view = qobject_cast<const QAbstractItemView*>(v3->widget)) + rect.setWidth(view->viewport()->width()); + QStyleOption opt; + opt.rect = rect; + mCombo->style()->drawPrimitive(QStyle::PE_IndicatorToolBarSeparator, &opt, painter, mCombo); + } else { + QItemDelegate::paint(painter, option, index); + } + } + + QSize sizeHint(const QStyleOptionViewItem &option, + const QModelIndex &index) const { + if (isSeparator(index)) { + int pm = mCombo->style()->pixelMetric(QStyle::PM_DefaultFrameWidth, 0, mCombo); + return QSize(pm, pm); + } + return QItemDelegate::sizeHint(option, index); + } +private: + QComboBox *mCombo; +}; + +class QComboBoxPrivate : public QWidgetPrivate +{ + Q_DECLARE_PUBLIC(QComboBox) +public: + QComboBoxPrivate(); + ~QComboBoxPrivate() {} + void init(); + QComboBoxPrivateContainer* viewContainer(); + void updateLineEditGeometry(); + void _q_returnPressed(); + void _q_complete(); + void _q_itemSelected(const QModelIndex &item); + bool contains(const QString &text, int role); + void emitActivated(const QModelIndex&); + void _q_emitHighlighted(const QModelIndex&); + void _q_emitCurrentIndexChanged(const QModelIndex &index); + void _q_modelDestroyed(); + void _q_modelReset(); +#ifdef QT_KEYPAD_NAVIGATION + void _q_completerActivated(); +#endif + void _q_resetButton(); + void _q_dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight); + void _q_rowsAboutToBeInserted(const QModelIndex & parent, int start, int end); + void _q_rowsInserted(const QModelIndex & parent, int start, int end); + void _q_rowsAboutToBeRemoved(const QModelIndex & parent, int start, int end); + void _q_rowsRemoved(const QModelIndex & parent, int start, int end); + void updateArrow(QStyle::StateFlag state); + bool updateHoverControl(const QPoint &pos); + QRect popupGeometry(int screen = -1) const; + QStyle::SubControl newHoverControl(const QPoint &pos); + int computeWidthHint() const; + QSize recomputeSizeHint(QSize &sh) const; + void adjustComboBoxSize(); + QString itemText(const QModelIndex &index) const; + QIcon itemIcon(const QModelIndex &index) const; + int itemRole() const; + void updateLayoutDirection(); + void setCurrentIndex(const QModelIndex &index); + void updateDelegate(); + void keyboardSearchString(const QString &text); + void modelChanged(); + + QAbstractItemModel *model; + QLineEdit *lineEdit; + QComboBoxPrivateContainer *container; + QComboBox::InsertPolicy insertPolicy; + QComboBox::SizeAdjustPolicy sizeAdjustPolicy; + int minimumContentsLength; + QSize iconSize; + uint shownOnce : 1; + uint autoCompletion : 1; + uint duplicatesEnabled : 1; + uint frame : 1; + uint padding : 26; + int maxVisibleItems; + int maxCount; + int modelColumn; + bool inserting; + mutable QSize minimumSizeHint; + mutable QSize sizeHint; + QStyle::StateFlag arrowState; + QStyle::SubControl hoverControl; + QRect hoverRect; + QPersistentModelIndex currentIndex; + QPersistentModelIndex root; + Qt::CaseSensitivity autoCompletionCaseSensitivity; + int indexBeforeChange; +#ifndef QT_NO_COMPLETER + QPointer<QCompleter> completer; +#endif + static QPalette viewContainerPalette(QComboBox *cmb) + { return cmb->d_func()->viewContainer()->palette(); } +}; + +QT_END_NAMESPACE + +#endif // QT_NO_COMBOBOX + +#endif // QCOMBOBOX_P_H |