Nicer search bar

The new widget is taken from Qt Creator code.

src/gui/clipboardbrowser.cpp

@@ -1009,17 +1009,17 @@ void ClipboardBrowser::itemModified(const QByteArray &bytes, const QString &mime
     }
 }
 
-void ClipboardBrowser::filterItems(const QString &str)
+void ClipboardBrowser::filterItems(const QRegExp &re)
 {
-    if (m_lastFilter.pattern() == str)
+    if (m_lastFilter == re)
         return;
-    m_lastFilter = QRegExp(str, Qt::CaseInsensitive);
+    m_lastFilter = re;
 
     // if search string empty: all items visible
     d->setSearch(m_lastFilter);
 
     // row to select
-    int first = str.isEmpty() ? currentIndex().row() : -1;
+    int first = re.isEmpty() ? currentIndex().row() : -1;
 
     // hide filtered items
     for(int i = 0; i < m->rowCount(); ++i) {

src/gui/clipboardbrowser.h

@@ -347,10 +347,10 @@ class ClipboardBrowser : public QListView
         void moveToClipboard(const QModelIndex &ind);
         /** Move item to clipboard. */
         void moveToClipboard(int i);
-        /** Show only items matching the pattern. */
-        void filterItems(const QString &str);
+        /** Show only items matching the regular expression. */
+        void filterItems(const QRegExp &re);
         /** Show all items. */
-        void clearFilter() { filterItems( QString() ); }
+        void clearFilter() { filterItems( QRegExp() ); }
         /** Item modified in external editor. */
         void itemModified(const QByteArray &bytes, const QString &mime);
         /** Called if editor was closed. */

src/gui/configtabappearance.cpp

@@ -193,7 +193,7 @@ ConfigTabAppearance::ConfigTabAppearance(QWidget *parent)
     c->at(0)->setData( mimeItemNotes, tr("Some random notes (Shift+F2 to edit)").toUtf8() );
 
     // Highlight found text but don't filter out any items.
-    c->filterItems( QString("|") + searchFor );
+    c->filterItems( QRegExp(QString("|") + searchFor, Qt::CaseInsensitive) );
 
     QAction *act;
 

src/gui/fancylineedit.cpp

@@ -0,0 +1,350 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "fancylineedit.h"
+
+#include <QAbstractItemView>
+#include <QApplication>
+#include <QDebug>
+#include <QDesktopWidget>
+#include <QKeyEvent>
+#include <QMenu>
+#include <QPainter>
+#include <QPropertyAnimation>
+#include <QStyle>
+
+/*! Opens a menu at the specified widget position.
+ * This functions computes the position where to show the menu, and opens it with
+ * QMenu::exec().
+ * \param menu The menu to open
+ * \param widget The widget next to which to open the menu
+ */
+static void execMenuAtWidget(QMenu *menu, QWidget *widget)
+{
+    QPoint p;
+    QRect screen = qApp->desktop()->availableGeometry(widget);
+    QSize sh = menu->sizeHint();
+    QRect rect = widget->rect();
+    if (widget->isRightToLeft()) {
+        if (widget->mapToGlobal(QPoint(0, rect.bottom())).y() + sh.height() <= screen.height())
+            p = widget->mapToGlobal(rect.bottomRight());
+        else
+            p = widget->mapToGlobal(rect.topRight() - QPoint(0, sh.height()));
+        p.rx() -= sh.width();
+    } else {
+        if (widget->mapToGlobal(QPoint(0, rect.bottom())).y() + sh.height() <= screen.height())
+            p = widget->mapToGlobal(rect.bottomLeft());
+        else
+            p = widget->mapToGlobal(rect.topLeft() - QPoint(0, sh.height()));
+    }
+    p.rx() = qMax(screen.left(), qMin(p.x(), screen.right() - sh.width()));
+    p.ry() += 1;
+
+    menu->exec(p);
+}
+
+/*!
+    \class Utils::FancyLineEdit
+
+    \brief The FancyLineEdit class is a line edit with an embedded pixmap on
+    one side that is connected to
+    a menu.
+
+    Additionally, it can display a grayed hintText (like "Type Here to")
+    when not focused and empty. When connecting to the changed signals and
+    querying text, one has to be aware that the text is set to that hint
+    text if isShowingHintText() returns true (that is, does not contain
+    valid user input).
+ */
+
+enum { margin = 6 };
+
+#define ICONBUTTON_HEIGHT 18
+#define FADE_TIME 160
+
+namespace Utils {
+
+// --------- FancyLineEditPrivate
+class FancyLineEditPrivate : public QObject
+{
+public:
+    explicit FancyLineEditPrivate(FancyLineEdit *parent);
+
+    virtual bool eventFilter(QObject *obj, QEvent *event);
+
+    FancyLineEdit  *m_lineEdit;
+    QPixmap m_pixmap[2];
+    QMenu *m_menu[2];
+    bool m_menuTabFocusTrigger[2];
+    IconButton *m_iconbutton[2];
+    bool m_iconEnabled[2];
+};
+
+
+FancyLineEditPrivate::FancyLineEditPrivate(FancyLineEdit *parent) :
+    QObject(parent), m_lineEdit(parent)
+{
+    for (int i = 0; i < 2; ++i) {
+        m_menu[i] = 0;
+        m_menuTabFocusTrigger[i] = false;
+        m_iconbutton[i] = new IconButton(parent);
+        m_iconbutton[i]->installEventFilter(this);
+        m_iconbutton[i]->hide();
+        m_iconbutton[i]->setAutoHide(false);
+        m_iconEnabled[i] = false;
+    }
+}
+
+bool FancyLineEditPrivate::eventFilter(QObject *obj, QEvent *event)
+{
+    int buttonIndex = -1;
+    for (int i = 0; i < 2; ++i) {
+        if (obj == m_iconbutton[i]) {
+            buttonIndex = i;
+            break;
+        }
+    }
+    if (buttonIndex == -1)
+        return QObject::eventFilter(obj, event);
+    switch (event->type()) {
+    case QEvent::FocusIn:
+        if (m_menuTabFocusTrigger[buttonIndex] && m_menu[buttonIndex]) {
+            m_lineEdit->setFocus();
+            execMenuAtWidget(m_menu[buttonIndex], m_iconbutton[buttonIndex]);
+            return true;
+        }
+    default:
+        break;
+    }
+    return QObject::eventFilter(obj, event);
+}
+
+
+// --------- FancyLineEdit
+FancyLineEdit::FancyLineEdit(QWidget *parent) :
+    QLineEdit(parent),
+    d(new FancyLineEditPrivate(this))
+{
+    ensurePolished();
+    updateMargins();
+
+    connect(this, SIGNAL(textChanged(QString)), this, SLOT(checkButtons(QString)));
+    connect(d->m_iconbutton[Left], SIGNAL(clicked()), this, SLOT(iconClicked()));
+    connect(d->m_iconbutton[Right], SIGNAL(clicked()), this, SLOT(iconClicked()));
+}
+
+void FancyLineEdit::checkButtons(const QString &text)
+{
+    if (m_oldText.isEmpty() || text.isEmpty()) {
+        for (int i = 0; i < 2; ++i) {
+            if (d->m_iconbutton[i]->hasAutoHide())
+                d->m_iconbutton[i]->animateShow(!text.isEmpty());
+        }
+        m_oldText = text;
+    }
+}
+
+FancyLineEdit::~FancyLineEdit()
+{
+}
+
+void FancyLineEdit::setButtonVisible(Side side, bool visible)
+{
+    d->m_iconbutton[side]->setVisible(visible);
+    d->m_iconEnabled[side] = visible;
+    updateMargins();
+}
+
+bool FancyLineEdit::isButtonVisible(Side side) const
+{
+    return d->m_iconEnabled[side];
+}
+
+void FancyLineEdit::iconClicked()
+{
+    IconButton *button = qobject_cast<IconButton *>(sender());
+    int index = -1;
+    for (int i = 0; i < 2; ++i)
+        if (d->m_iconbutton[i] == button)
+            index = i;
+    if (index == -1)
+        return;
+    if (d->m_menu[index]) {
+        execMenuAtWidget(d->m_menu[index], button);
+    } else {
+        emit buttonClicked((Side)index);
+        if (index == Left)
+            emit leftButtonClicked();
+        else if (index == Right)
+            emit rightButtonClicked();
+    }
+}
+
+void FancyLineEdit::updateMargins()
+{
+    bool leftToRight = (layoutDirection() == Qt::LeftToRight);
+    Side realLeft = (leftToRight ? Left : Right);
+    Side realRight = (leftToRight ? Right : Left);
+
+    int leftMargin = d->m_iconbutton[realLeft]->pixmap().width() + 8;
+    int rightMargin = d->m_iconbutton[realRight]->pixmap().width() + 8;
+    // Note KDE does not reserve space for the highlight color
+    if (style()->inherits("OxygenStyle")) {
+        leftMargin = qMax(24, leftMargin);
+        rightMargin = qMax(24, rightMargin);
+    }
+
+    QMargins margins((d->m_iconEnabled[realLeft] ? leftMargin : 0), 0,
+                     (d->m_iconEnabled[realRight] ? rightMargin : 0), 0);
+
+    setTextMargins(margins);
+}
+
+void FancyLineEdit::updateButtonPositions()
+{
+    QRect contentRect = rect();
+    for (int i = 0; i < 2; ++i) {
+        Side iconpos = (Side)i;
+        if (layoutDirection() == Qt::RightToLeft)
+            iconpos = (iconpos == Left ? Right : Left);
+
+        if (iconpos == FancyLineEdit::Right) {
+            const int iconoffset = textMargins().right() + 4;
+            d->m_iconbutton[i]->setGeometry(contentRect.adjusted(width() - iconoffset, 0, 0, 0));
+        } else {
+            const int iconoffset = textMargins().left() + 4;
+            d->m_iconbutton[i]->setGeometry(contentRect.adjusted(0, 0, -width() + iconoffset, 0));
+        }
+    }
+}
+
+void FancyLineEdit::resizeEvent(QResizeEvent *)
+{
+    updateButtonPositions();
+}
+
+void FancyLineEdit::setButtonPixmap(Side side, const QPixmap &buttonPixmap)
+{
+    d->m_iconbutton[side]->setPixmap(buttonPixmap);
+    updateMargins();
+    updateButtonPositions();
+    update();
+}
+
+QPixmap FancyLineEdit::buttonPixmap(Side side) const
+{
+    return d->m_pixmap[side];
+}
+
+void FancyLineEdit::setButtonMenu(Side side, QMenu *buttonMenu)
+{
+     d->m_menu[side] = buttonMenu;
+     d->m_iconbutton[side]->setIconOpacity(1.0);
+ }
+
+QMenu *FancyLineEdit::buttonMenu(Side side) const
+{
+    return  d->m_menu[side];
+}
+
+bool FancyLineEdit::hasMenuTabFocusTrigger(Side side) const
+{
+    return d->m_menuTabFocusTrigger[side];
+}
+
+void FancyLineEdit::setMenuTabFocusTrigger(Side side, bool v)
+{
+    if (d->m_menuTabFocusTrigger[side] == v)
+        return;
+
+    d->m_menuTabFocusTrigger[side] = v;
+    d->m_iconbutton[side]->setFocusPolicy(v ? Qt::TabFocus : Qt::NoFocus);
+}
+
+bool FancyLineEdit::hasAutoHideButton(Side side) const
+{
+    return d->m_iconbutton[side]->hasAutoHide();
+}
+
+void FancyLineEdit::setAutoHideButton(Side side, bool h)
+{
+    d->m_iconbutton[side]->setAutoHide(h);
+    if (h)
+        d->m_iconbutton[side]->setIconOpacity(text().isEmpty() ?  0.0 : 1.0);
+    else
+        d->m_iconbutton[side]->setIconOpacity(1.0);
+}
+
+void FancyLineEdit::setButtonToolTip(Side side, const QString &tip)
+{
+    d->m_iconbutton[side]->setToolTip(tip);
+}
+
+void FancyLineEdit::setButtonFocusPolicy(Side side, Qt::FocusPolicy policy)
+{
+    d->m_iconbutton[side]->setFocusPolicy(policy);
+}
+
+// IconButton - helper class to represent a clickable icon
+
+IconButton::IconButton(QWidget *parent)
+    : QAbstractButton(parent), m_autoHide(false)
+{
+    setCursor(Qt::ArrowCursor);
+    setFocusPolicy(Qt::NoFocus);
+}
+
+void IconButton::paintEvent(QPaintEvent *)
+{
+    QPainter painter(this);
+    QRect pixmapRect = QRect(0, 0, m_pixmap.width(), m_pixmap.height());
+    pixmapRect.moveCenter(rect().center());
+
+    if (m_autoHide)
+        painter.setOpacity(m_iconOpacity);
+
+    painter.drawPixmap(pixmapRect, m_pixmap);
+}
+
+void IconButton::animateShow(bool visible)
+{
+    if (visible) {
+        QPropertyAnimation *animation = new QPropertyAnimation(this, "iconOpacity");
+        animation->setDuration(FADE_TIME);
+        animation->setEndValue(1.0);
+        animation->start(QAbstractAnimation::DeleteWhenStopped);
+    } else {
+        QPropertyAnimation *animation = new QPropertyAnimation(this, "iconOpacity");
+        animation->setDuration(FADE_TIME);
+        animation->setEndValue(0.0);
+        animation->start(QAbstractAnimation::DeleteWhenStopped);
+    }
+}
+
+} // namespace Utils