+/***************************************************************************
+ * Copyright (C) 2008 by Fredrik Höglund <fredrik@kde.org> *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program 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 General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
+ ***************************************************************************/
+
+#include "ktooltip.h"
+
+#include <QApplication>
+#include <QMap>
+#include <QPixmap>
+#include <QPainter>
+#include <QVariant>
+#include <QIcon>
+#include <QWidget>
+#include <QToolTip>
+#include <QDebug>
+
+#ifdef Q_WS_X11
+# include <QX11Info>
+# include <X11/Xlib.h>
+# include <X11/extensions/Xrender.h>
+# include <X11/extensions/shape.h>
+#endif
+
+#include "ktooltip_p.h"
+
+
+
+class KToolTipItemPrivate
+{
+public:
+ QMap<int, QVariant> map;
+ int type;
+};
+
+KToolTipItem::KToolTipItem(const QString &text, int type)
+ : d(new KToolTipItemPrivate)
+{
+ d->map[Qt::DisplayRole] = text;
+ d->type = type;
+}
+
+KToolTipItem::KToolTipItem(const QIcon &icon, const QString &text, int type)
+ : d(new KToolTipItemPrivate)
+{
+ d->map[Qt::DecorationRole] = icon;
+ d->map[Qt::DisplayRole] = text;
+ d->type = type;
+}
+
+KToolTipItem::~KToolTipItem()
+{
+}
+
+int KToolTipItem::type() const
+{
+ return d->type;
+}
+
+QString KToolTipItem::text() const
+{
+ return data(Qt::DisplayRole).toString();
+}
+
+QIcon KToolTipItem::icon() const
+{
+ return qvariant_cast<QIcon>(data(Qt::DecorationRole));
+}
+
+QVariant KToolTipItem::data(int role) const
+{
+ return d->map.value(role);
+}
+
+void KToolTipItem::setData(int role, const QVariant &data)
+{
+ d->map[role] = data;
+}
+
+
+
+// ----------------------------------------------------------------------------
+
+
+KStyleOptionToolTip::KStyleOptionToolTip()
+ : fontMetrics(QApplication::font())
+{
+}
+
+
+// ----------------------------------------------------------------------------
+
+
+
+KToolTipDelegate::KToolTipDelegate() : QObject()
+{
+}
+
+KToolTipDelegate::~KToolTipDelegate()
+{
+}
+
+QSize KToolTipDelegate::sizeHint(const KStyleOptionToolTip *option, const KToolTipItem *item) const
+{
+ QSize size;
+ size.rwidth() = option->fontMetrics.width(item->text());
+ size.rheight() = option->fontMetrics.lineSpacing();
+
+ QIcon icon = item->icon();
+ if (!icon.isNull()) {
+ const QSize iconSize = icon.actualSize(option->decorationSize);
+ size.rwidth() += iconSize.width() + 4;
+ size.rheight() = qMax(size.height(), iconSize.height());
+ }
+
+ return size + QSize(20, 20);
+
+}
+
+void KToolTipDelegate::paint(QPainter *painter, const KStyleOptionToolTip *option,
+ const KToolTipItem *item) const
+{
+ bool haveAlpha = haveAlphaChannel();
+ painter->setRenderHint(QPainter::Antialiasing);
+
+ QPainterPath path;
+ if (haveAlpha)
+ path.addRoundRect(option->rect.adjusted(0, 0, -1, -1), 25);
+ else
+ path.addRect(option->rect.adjusted(0, 0, -1, -1));
+
+#if QT_VERSION >= 0x040400
+ QColor color = option->palette.color(QPalette::ToolTipBase);
+#else
+ QColor color = option->palette.color(QPalette::Base);
+#endif
+ QColor from = color.lighter(105);
+ QColor to = color.darker(120);
+
+ QLinearGradient gradient(0, 0, 0, 1);
+ gradient.setCoordinateMode(QGradient::ObjectBoundingMode);
+ gradient.setColorAt(0, from);
+ gradient.setColorAt(1, to);
+
+ painter->translate(.5, .5);
+ painter->setPen(QPen(Qt::black, 1));
+ painter->setBrush(gradient);
+ painter->drawPath(path);
+ painter->translate(-.5, -.5);
+
+ if (haveAlpha) {
+ QLinearGradient mask(0, 0, 0, 1);
+ gradient.setCoordinateMode(QGradient::ObjectBoundingMode);
+ gradient.setColorAt(0, QColor(0, 0, 0, 192));
+ gradient.setColorAt(1, QColor(0, 0, 0, 72));
+ painter->setCompositionMode(QPainter::CompositionMode_DestinationIn);
+ painter->fillRect(option->rect, gradient);
+ painter->setCompositionMode(QPainter::CompositionMode_SourceOver);
+ }
+
+ QRect textRect = option->rect.adjusted(10, 10, -10, -10);
+
+ QIcon icon = item->icon();
+ if (!icon.isNull()) {
+ const QSize iconSize = icon.actualSize(option->decorationSize);
+ painter->drawPixmap(textRect.topLeft(), icon.pixmap(iconSize));
+ textRect.adjust(iconSize.width() + 4, 0, 0, 0);
+ }
+ painter->drawText(textRect, Qt::AlignLeft | Qt::AlignVCenter, item->text());
+}
+
+QRegion KToolTipDelegate::inputShape(const KStyleOptionToolTip *option) const
+{
+ return QRegion(option->rect);
+}
+
+QRegion KToolTipDelegate::shapeMask(const KStyleOptionToolTip *option) const
+{
+ return QRegion(option->rect);
+}
+
+bool KToolTipDelegate::haveAlphaChannel() const
+{
+ return KToolTipManager::instance()->haveAlphaChannel();
+}
+
+
+
+// ----------------------------------------------------------------------------
+
+
+
+class KAbstractToolTipLabel
+{
+public:
+ KAbstractToolTipLabel() {}
+ virtual ~KAbstractToolTipLabel() {}
+
+ virtual void showTip(const QPoint &pos, const KToolTipItem *item) = 0;
+ virtual void moveTip(const QPoint &pos) = 0;
+ virtual void hideTip() = 0;
+
+protected:
+ KStyleOptionToolTip styleOption() const;
+ KToolTipDelegate *delegate() const;
+};
+
+KStyleOptionToolTip KAbstractToolTipLabel::styleOption() const
+{
+ KStyleOptionToolTip option;
+ KToolTipManager::instance()->initStyleOption(&option);
+ return option;
+}
+
+KToolTipDelegate *KAbstractToolTipLabel::delegate() const
+{
+ return KToolTipManager::instance()->delegate();
+}
+
+
+// ----------------------------------------------------------------------------
+
+
+
+class QWidgetLabel : public QWidget, public KAbstractToolTipLabel
+{
+public:
+ QWidgetLabel() : QWidget(0, Qt::ToolTip) {}
+ void showTip(const QPoint &pos, const KToolTipItem *item);
+ void moveTip(const QPoint &pos);
+ void hideTip();
+
+private:
+ void paintEvent(QPaintEvent*);
+ QSize sizeHint() const;
+
+private:
+ const KToolTipItem *currentItem;
+};
+
+void QWidgetLabel::showTip(const QPoint &pos, const KToolTipItem *item)
+{
+ currentItem = item;
+ move(pos);
+ show();
+}
+
+void QWidgetLabel::hideTip()
+{
+ hide();
+ currentItem = 0;
+}
+
+void QWidgetLabel::moveTip(const QPoint &pos)
+{
+ move(pos);
+}
+
+void QWidgetLabel::paintEvent(QPaintEvent*)
+{
+ KStyleOptionToolTip option = styleOption();
+ option.rect = rect();
+
+ setMask(delegate()->shapeMask(&option));
+
+ QPainter p(this);
+ p.setFont(option.font);
+ p.setPen(QPen(option.palette.brush(QPalette::Text), 0));
+ delegate()->paint(&p, &option, currentItem);
+}
+
+QSize QWidgetLabel::sizeHint() const
+{
+ if (!currentItem)
+ return QSize();
+
+ KStyleOptionToolTip option = styleOption();
+ return delegate()->sizeHint(&option, currentItem);
+}
+
+
+
+// ----------------------------------------------------------------------------
+
+
+
+#ifdef Q_WS_X11
+
+// X11 specific label that displays the tip in an ARGB window.
+class ArgbLabel : public KAbstractToolTipLabel
+{
+public:
+ ArgbLabel(Visual *visual, int depth);
+ ~ArgbLabel();
+
+ void showTip(const QPoint &pos, const KToolTipItem *item);
+ void moveTip(const QPoint &pos);
+ void hideTip();
+
+private:
+ Window window;
+ Colormap colormap;
+ Picture picture;
+ bool mapped;
+};
+
+ArgbLabel::ArgbLabel(Visual *visual, int depth)
+{
+ Display *dpy = QX11Info::display();
+ Window root = QX11Info::appRootWindow();
+ colormap = XCreateColormap(dpy, QX11Info::appRootWindow(), visual, AllocNone);
+
+ XSetWindowAttributes attr;
+ attr.border_pixel = 0;
+ attr.background_pixel = 0;
+ attr.colormap = colormap;
+ attr.override_redirect = True;
+
+ window = XCreateWindow(dpy, root, 0, 0, 1, 1, 0, depth, InputOutput, visual,
+ CWBorderPixel | CWBackPixel | CWColormap |
+ CWOverrideRedirect, &attr);
+
+ // ### TODO: Set the WM hints so KWin can identify this window as a
+ // tooltip.
+
+ XRenderPictFormat *format = XRenderFindVisualFormat(dpy, visual);
+ picture = XRenderCreatePicture(dpy, window, format, 0, 0);
+
+ mapped = false;
+}
+
+ArgbLabel::~ArgbLabel()
+{
+ Display *dpy = QX11Info::display();
+ XRenderFreePicture(dpy, picture);
+ XDestroyWindow(dpy, window);
+ XFreeColormap(dpy, colormap);
+}
+
+void ArgbLabel::showTip(const QPoint &pos, const KToolTipItem *item)
+{
+ Display *dpy = QX11Info::display();
+ KStyleOptionToolTip option = styleOption();
+ const QSize size = delegate()->sizeHint(&option, item);
+ option.rect = QRect(QPoint(), size);
+
+ QPixmap pixmap(size);
+ pixmap.fill(Qt::transparent);
+
+ QPainter p(&pixmap);
+ p.setFont(option.font);
+ p.setPen(QPen(option.palette.brush(QPalette::Text), 0));
+ delegate()->paint(&p, &option, item);
+
+ // Resize, position and show the window.
+ XMoveResizeWindow(dpy, window, pos.x(), pos.y(), size.width(), size.height());
+
+ if (KToolTipManager::instance()->haveAlphaChannel()) {
+ const QRegion region = delegate()->inputShape(&option);
+ XShapeCombineRegion(dpy, window, ShapeInput, 0, 0, region.handle(), ShapeSet);
+ } else {
+ const QRegion region = delegate()->shapeMask(&option);
+ XShapeCombineRegion(dpy, window, ShapeBounding, 0, 0, region.handle(), ShapeSet);
+ }
+
+ XMapWindow(dpy, window);
+
+ // Blit the pixmap with the tip contents to the window.
+ // Since the window is override-redirect and an ARGB32 window,
+ // which always has an offscreen pixmap, there's no need to
+ // wait for an Expose event, or to process those.
+ XRenderComposite(dpy, PictOpSrc, pixmap.x11PictureHandle(), None,
+ picture, 0, 0, 0, 0, 0, 0, size.width(), size.height());
+
+ mapped = true;
+}
+
+void ArgbLabel::moveTip(const QPoint &pos)
+{
+ if (mapped)
+ XMoveWindow(QX11Info::display(), window, pos.x(), pos.y());
+}
+
+void ArgbLabel::hideTip()
+{
+ if (mapped) {
+ Display *dpy = QX11Info::display();
+ XUnmapWindow(dpy, window);
+ mapped = false;
+ }
+}
+
+#endif // Q_WS_X11
+
+
+
+
+// ----------------------------------------------------------------------------
+
+
+
+
+KToolTipManager *KToolTipManager::s_instance = 0;
+
+KToolTipManager::KToolTipManager()
+ : label(0), currentItem(0)
+{
+#ifdef Q_WS_X11
+ Display *dpy = QX11Info::display();
+ int screen = DefaultScreen(dpy);
+ int depth = DefaultDepth(dpy, screen);
+ Visual *visual = DefaultVisual(dpy, screen);
+ net_wm_cm_s0 = XInternAtom(dpy, "_NET_WM_CM_S0", False);
+ haveArgbVisual = false;
+
+ int nvi;
+ XVisualInfo templ;
+ templ.screen = screen;
+ templ.depth = 32;
+ templ.c_class = TrueColor;
+ XVisualInfo *xvi = XGetVisualInfo(dpy, VisualScreenMask | VisualDepthMask |
+ VisualClassMask, &templ, &nvi);
+
+ for (int i = 0; i < nvi; ++i)
+ {
+ XRenderPictFormat *format = XRenderFindVisualFormat(dpy, xvi[i].visual);
+ if (format->type == PictTypeDirect && format->direct.alphaMask)
+ {
+ visual = xvi[i].visual;
+ depth = xvi[i].depth;
+ haveArgbVisual = true;
+ break;
+ }
+ }
+
+ if (haveArgbVisual)
+ label = new ArgbLabel(visual, depth);
+ else
+#endif
+ label = new QWidgetLabel();
+}
+
+KToolTipManager::~KToolTipManager()
+{
+ delete label;
+ delete currentItem;
+}
+
+void KToolTipManager::showTip(const QPoint &pos, KToolTipItem *item)
+{
+ hideTip();
+ label->showTip(pos, item);
+ currentItem = item;
+}
+
+void KToolTipManager::hideTip()
+{
+ label->hideTip();
+ delete currentItem;
+ currentItem = 0;
+}
+
+void KToolTipManager::initStyleOption(KStyleOptionToolTip *option) const
+{
+ option->direction = QApplication::layoutDirection();
+ option->fontMetrics = QFontMetrics(QToolTip::font());
+ option->activeCorner = KStyleOptionToolTip::TopLeftCorner;
+ option->palette = QToolTip::palette();
+ option->font = QToolTip::font();
+ option->rect = QRect();
+ option->state = QStyle::State_None;
+ option->decorationSize = QSize(32, 32);
+}
+
+bool KToolTipManager::haveAlphaChannel() const
+{
+#ifdef Q_WS_X11
+ // ### This is a synchronous call - ideally we'd use a selection
+ // watcher to avoid it.
+ return haveArgbVisual &&
+ XGetSelectionOwner(QX11Info::display(), net_wm_cm_s0) != None;
+#else
+ return false;
+#endif
+}
+
+void KToolTipManager::setDelegate(KToolTipDelegate *delegate)
+{
+ m_delegate = delegate;
+}
+
+KToolTipDelegate *KToolTipManager::delegate() const
+{
+ return m_delegate;
+}
+
+
+
+// ----------------------------------------------------------------------------
+
+
+
+namespace KToolTip
+{
+ void showText(const QPoint &pos, const QString &text, QWidget *widget, const QRect &rect)
+ {
+ Q_UNUSED(widget)
+ Q_UNUSED(rect)
+ KToolTipItem *item = new KToolTipItem(text);
+ KToolTipManager::instance()->showTip(pos, item);
+ }
+
+ void showText(const QPoint &pos, const QString &text, QWidget *widget)
+ {
+ showText(pos, text, widget, QRect());
+ }
+
+ void showTip(const QPoint &pos, KToolTipItem *item)
+ {
+ KToolTipManager::instance()->showTip(pos, item);
+ }
+
+ void hideTip()
+ {
+ KToolTipManager::instance()->hideTip();
+ }
+
+ void setToolTipDelegate(KToolTipDelegate *delegate)
+ {
+ KToolTipManager::instance()->setDelegate(delegate);
+ }
+}
+
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