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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commitce4a32fe52ef09d8f5ff1dd22c001110902b60a2 (patch)
tree5ac38a06f3dde268dc7927dc155896926aaf7012 /kdeui/kurllabel.h
downloadtdelibs-ce4a32fe52ef09d8f5ff1dd22c001110902b60a2.tar.gz
tdelibs-ce4a32fe52ef09d8f5ff1dd22c001110902b60a2.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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+/* This file is part of the KDE libraries
+ Copyright (C) 1998 Kurt Granroth <granroth@kde.org>
+ Copyright (C) 2000 Peter Putzer <putzer@kde.org>
+ Copyright (C) 2005 Jaroslaw Staniek <js@iidea.pl>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License version 2 as published by the Free Software Foundation.
+
+ 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., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+*/
+
+#ifndef KURLLABEL_H
+#define KURLLABEL_H
+
+#include <qlabel.h>
+
+#include <kdelibs_export.h>
+
+class QColor;
+class QCursor;
+class QPixmap;
+
+/**
+ * @short A drop-in replacement for QLabel that displays hyperlinks.
+ *
+ * KURLLabel is a drop-in replacement for QLabel that handles text
+ * in a fashion similar to how an HTML widget handles hyperlinks. The
+ * text can be underlined (or not) and set to different colors. It
+ * can also "glow" (cycle colors) when the mouse passes over it.
+ *
+ * KURLLabel also provides signals for several events, including
+ * the mouse leaving and entering the text area and all forms of
+ * mouse clicking.
+ *
+ * By default KURLLabel accepts focus. When focused, standard
+ * focus rectangle is displayed as in HTML widget.
+ * Pressing Enter key accepts the focused label.
+ *
+ * A typical usage would be something like so:
+ *
+ * \code
+ * KURLLabel *address = new KURLLabel(this);
+ * address->setText("My homepage");
+ * address->setURL("http://www.home.com/~me");
+ * connect(address, SIGNAL(leftClickedURL(const QString&)),
+ * SLOT(processMyURL(const QString&)));
+ * \endcode
+ *
+ * In this example, the text "My homepage" would be displayed
+ * as blue, underlined text. When the mouse passed over it,
+ * it would "glow" red. When the user clicks on the text, the
+ * signal leftClickedURL() would be emitted with "http://www.home.com/~me"
+ * as its argument.
+ *
+ * \image html kurllabel.png "KDE URL Label"
+ *
+ * @author Kurt Granroth <granroth@kde.org> (Interface)
+ * @author Peter Putzer <putzer@kde.org> (Rewrite)
+ * @version $Id$
+ *
+ */
+class KDEUI_EXPORT KURLLabel : public QLabel
+{
+ Q_OBJECT
+ Q_PROPERTY (QString url READ url WRITE setURL)
+ Q_PROPERTY (QString tipText READ tipText WRITE setTipText )
+ Q_PROPERTY (QPixmap altPixmap READ altPixmap WRITE setAltPixmap)
+ Q_PROPERTY (bool glowEnabled READ isGlowEnabled WRITE setGlow )
+ Q_PROPERTY (bool floatEnabled READ isFloatEnabled WRITE setFloat )
+ Q_PROPERTY (bool useTips READ useTips WRITE setUseTips )
+ Q_PROPERTY (bool useCursor READ useCursor WRITE setUseCursor )
+
+public:
+ /**
+ * Default constructor.
+ *
+ * Use setURL() and setText() or QListView::setPixmap()
+ * to set the resp. properties.
+ */
+ KURLLabel (QWidget* parent = 0L, const char* name = 0L);
+
+ /**
+ * Convenience constructor.
+ *
+ * @param url is the URL emitted when the label is clicked.
+ * @param text is the displayed string. If it's equal to QString::null
+ * the @p url will be used instead.
+ * @param parent Passed to lower level constructor
+ * @param name Passed to lower level constructor
+ *
+ * @p parent and @p name are passed to QLabel, which in turn passes
+ * them further down
+ */
+ KURLLabel (const QString& url, const QString& text = QString::null,
+ QWidget* parent = 0L, const char* name = 0L);
+
+ /**
+ * Destructs the label.
+ */
+ virtual ~KURLLabel ();
+
+ /**
+ * Returns the URL.
+ */
+ const QString& url () const;
+
+ /**
+ * Returns the current tooltip text.
+ */
+ const QString& tipText () const;
+
+ /**
+ * @return true if a tooltip will be displayed.
+ *
+ * @see setTipText()
+ */
+ bool useTips () const;
+
+ /**
+ * @return true if the cursor will change while over the URL.
+ *
+ * @see setUseCursor ()
+ */
+ bool useCursor () const;
+
+ /**
+ * When this is on, the text will switch to the selected
+ * color whenever the mouse passes over it.
+ */
+ bool isGlowEnabled () const;
+
+ /**
+ * This feature is very similar to the "glow" feature in that the color of the
+ * label switches to the selected color when the cursor passes
+ * over it. In addition, underlining is turned on for as
+ * long as the mouse is overhead. Note that if "glow" and
+ * underlining are both already turned on, this feature
+ * will have no visible effect.
+ */
+ bool isFloatEnabled () const;
+
+ /**
+ * @return the alternate pixmap (may be 0L if none was set).
+ */
+ const QPixmap* altPixmap () const;
+
+ /**
+ * Reimplemented for internal reasons, the API is not affected.
+ */
+ virtual void setMargin ( int margin );
+
+ /**
+ * Reimplemented for internal reasons, the API is not affected.
+ */
+ virtual void setFocusPolicy ( FocusPolicy policy );
+
+ /**
+ * Reimplemented for internal reasons, the API is not affected.
+ */
+ virtual void setSizePolicy ( QSizePolicy );
+
+public slots:
+ /**
+ * Turns on or off the underlining.
+ *
+ * When this is on, the
+ * text will be underlined. By default, it is @p true.
+ */
+ void setUnderline (bool on = true);
+
+ /**
+ * Sets the URL for this label to @p url.
+ *
+ * @see url
+ */
+ void setURL (const QString& url);
+
+ /**
+ * Overridden for internal reasons; the API remains unaffected.
+ */
+ virtual void setFont (const QFont&);
+
+ /**
+ * Turns on or off the tool tip feature.
+ *
+ * When this is on, the URL will be displayed as a
+ * tooltip whenever the mouse passes passes over it.
+ * By default, it is @p false.
+ */
+ void setUseTips (bool on = true);
+
+ /**
+ * Specifies what text to display when tooltips are turned on.
+ *
+ * If this is not used, the tip will default to the URL.
+ *
+ * @see setUseTips()
+ */
+ void setTipText (const QString& tip);
+
+ /**
+ * Sets the highlight color.
+ *
+ * This is the default foreground
+ * color (non-selected). By default, it is @p blue.
+ */
+ void setHighlightedColor(const QColor& highcolor);
+
+ /**
+ * This is an overloaded version for convenience.
+ *
+ * @see setHighlightedColor()
+ */
+ void setHighlightedColor(const QString& highcolor);
+
+ /**
+ * Sets the selected color.
+ *
+ * This is the color the text will change
+ * to when either a mouse passes over it and "glow" mode is on or
+ * when it is selected (clicked). By default, it is @p red.
+ */
+ void setSelectedColor(const QColor& selcolor);
+
+ /**
+ * This is an overloaded version for convenience.
+ *
+ * @see setSelectedColor()
+ */
+ void setSelectedColor(const QString& selcolor);
+
+ /**
+ * Overridden for internal reasons; the API remains unaffected.
+ */
+ virtual void setCursor ( const QCursor& cursor );
+
+ /**
+ * Overridden for internal reasons; the API remains unaffected.
+ */
+ virtual void unsetCursor ();
+
+ /**
+ * Turns the custom cursor feature on or off.
+ *
+ * When this is on, the cursor will change to a custom cursor
+ * (default is a "pointing hand") whenever the cursor passes
+ * over the label. By default, it is on.
+ *
+ * @param on whether a custom cursor should be displayed.
+ * @param cursor is the custom cursor. @p 0L indicates the default "hand cursor".
+ */
+ void setUseCursor (bool on, QCursor* cursor = 0L);
+
+ /**
+ * Turns on or off the "glow" feature.
+ *
+ * When this is on, the text will switch to the
+ * selected color whenever the mouse
+ * passes over it. By default, it is @p true.
+ */
+ void setGlow (bool glow = true);
+
+ /**
+ * Turns on or off the "float" feature.
+ *
+ * This feature is very similar to the "glow" feature in
+ * that the color of the label switches to the selected
+ * color when the cursor passes over it. In addition,
+ * underlining is turned on for as long as the mouse is overhead.
+ * Note that if "glow" and underlining are both already turned
+ * on, this feature will have no visible effect.
+ * By default, it is @p false.
+ */
+ void setFloat (bool do_float = true);
+
+ /**
+ * Sets the "alt" pixmap.
+ *
+ * This pixmap will be displayed when the
+ * cursor passes over the label. The effect is similar to the
+ * trick done with 'onMouseOver' in javascript.
+ *
+ * @see altPixmap()
+ */
+ void setAltPixmap (const QPixmap& altPix);
+
+signals:
+
+ /**
+ * Emitted when the mouse has passed over the label.
+ *
+ * @param url The URL for this label.
+ */
+ void enteredURL (const QString& url);
+
+ /**
+ * Emitted when the mouse has passed over the label.
+ */
+ void enteredURL ();
+
+ /**
+ * Emitted when the mouse is no longer over the label.
+ *
+ * @param url The URL for this label.
+ */
+ void leftURL (const QString& url);
+
+ /**
+ * Emitted when the mouse is no longer over the label.
+ */
+ void leftURL ();
+
+ /**
+ * Emitted when the user clicked the left mouse button on this label.
+ *
+ * @param url The URL for this label.
+ */
+ void leftClickedURL(const QString& url);
+
+ /**
+ * Emitted when the user clicked the left mouse button on this label.
+ */
+ void leftClickedURL();
+
+ /**
+ * Emitted when the user clicked the right mouse button on this label.
+ *
+ * @param url The URL for this label.
+ */
+ void rightClickedURL(const QString& url);
+
+ /**
+ * Emitted when the user clicked the right mouse button on this label.
+ */
+ void rightClickedURL();
+
+ /**
+ * Emitted when the user clicked the middle mouse button on this label.
+ *
+ * @param url The URL for this label.
+ */
+ void middleClickedURL(const QString& url);
+
+ /**
+ * Emitted when the user clicked the left mouse button on this label.
+ */
+ void middleClickedURL();
+
+protected:
+
+ /**
+ * Overridden for internal reasons; the API remains unaffected.
+ */
+ virtual void mouseReleaseEvent ( QMouseEvent * e );
+
+ /**
+ * Overridden for internal reasons; the API remains unaffected.
+ */
+ virtual void enterEvent (QEvent*);
+
+ /**
+ * Overridden for internal reasons; the API remains unaffected.
+ */
+ virtual void leaveEvent (QEvent*);
+
+ /**
+ * Catch parent palette changes
+ */
+ virtual bool event (QEvent *e);
+
+ /**
+ *
+ */
+ QRect activeRect() const;
+
+
+private slots:
+ /**
+ * @internal
+ * Slot used to reset the link-color to normal (timer-driven).
+ */
+ void updateColor ();
+
+private:
+ /**
+ * @internal
+ * A private helper function to set the link-color to @p col.
+ */
+ void setLinkColor (const QColor& col);
+
+protected:
+ virtual void virtual_hook( int id, void* data );
+private:
+ class Private;
+ Private* d;
+};
+
+#endif // KURLLABEL_H