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408 lines
11 KiB
408 lines
11 KiB
/* This file is part of the KDE libraries
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Copyright (C) 1998 Kurt Granroth <granroth@kde.org>
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Copyright (C) 2000 Peter Putzer <putzer@kde.org>
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Copyright (C) 2005 Jaroslaw Staniek <js@iidea.pl>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License version 2 as published by the Free Software Foundation.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef KURLLABEL_H
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#define KURLLABEL_H
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#include <tqlabel.h>
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#include <kdelibs_export.h>
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class TQColor;
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class TQCursor;
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class TQPixmap;
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/**
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* @short A drop-in tqreplacement for TQLabel that displays hyperlinks.
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*
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* KURLLabel is a drop-in tqreplacement for TQLabel that handles text
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* in a fashion similar to how an HTML widget handles hyperlinks. The
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* text can be underlined (or not) and set to different colors. It
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* can also "glow" (cycle colors) when the mouse passes over it.
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*
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* KURLLabel also provides signals for several events, including
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* the mouse leaving and entering the text area and all forms of
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* mouse clicking.
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*
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* By default KURLLabel accepts focus. When focused, standard
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* focus rectangle is displayed as in HTML widget.
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* Pressing Enter key accepts the focused label.
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*
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* A typical usage would be something like so:
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*
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* \code
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* KURLLabel *address = new KURLLabel(this);
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* address->setText("My homepage");
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* address->setURL("http://www.home.com/~me");
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* connect(address, TQT_SIGNAL(leftClickedURL(const TQString&)),
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* TQT_SLOT(processMyURL(const TQString&)));
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* \endcode
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*
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* In this example, the text "My homepage" would be displayed
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* as blue, underlined text. When the mouse passed over it,
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* it would "glow" red. When the user clicks on the text, the
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* signal leftClickedURL() would be emitted with "http://www.home.com/~me"
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* as its argument.
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*
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* \image html kurllabel.png "KDE URL Label"
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*
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* @author Kurt Granroth <granroth@kde.org> (Interface)
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* @author Peter Putzer <putzer@kde.org> (Rewrite)
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* @version $Id$
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*
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*/
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class KDEUI_EXPORT KURLLabel : public QLabel
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{
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Q_OBJECT
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Q_PROPERTY (TQString url READ url WRITE setURL)
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Q_PROPERTY (TQString tipText READ tipText WRITE setTipText )
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Q_PROPERTY (TQPixmap altPixmap READ altPixmap WRITE setAltPixmap)
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Q_PROPERTY (bool glowEnabled READ isGlowEnabled WRITE setGlow )
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Q_PROPERTY (bool floatEnabled READ isFloatEnabled WRITE setFloat )
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Q_PROPERTY (bool useTips READ useTips WRITE setUseTips )
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Q_PROPERTY (bool useCursor READ useCursor WRITE setUseCursor )
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public:
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/**
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* Default constructor.
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*
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* Use setURL() and setText() or TQListView::setPixmap()
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* to set the resp. properties.
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*/
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KURLLabel (TQWidget* parent = 0L, const char* name = 0L);
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/**
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* Convenience constructor.
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*
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* @param url is the URL emitted when the label is clicked.
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* @param text is the displayed string. If it's equal to TQString::null
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* the @p url will be used instead.
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* @param parent Passed to lower level constructor
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* @param name Passed to lower level constructor
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*
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* @p parent and @p name are passed to TQLabel, which in turn passes
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* them further down
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*/
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KURLLabel (const TQString& url, const TQString& text = TQString::null,
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TQWidget* parent = 0L, const char* name = 0L);
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/**
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* Destructs the label.
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*/
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virtual ~KURLLabel ();
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/**
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* Returns the URL.
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*/
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const TQString& url () const;
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/**
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* Returns the current tooltip text.
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*/
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const TQString& tipText () const;
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/**
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* @return true if a tooltip will be displayed.
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*
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* @see setTipText()
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*/
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bool useTips () const;
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/**
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* @return true if the cursor will change while over the URL.
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*
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* @see setUseCursor ()
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*/
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bool useCursor () const;
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/**
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* When this is on, the text will switch to the selected
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* color whenever the mouse passes over it.
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*/
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bool isGlowEnabled () const;
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/**
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* This feature is very similar to the "glow" feature in that the color of the
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* label switches to the selected color when the cursor passes
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* over it. In addition, underlining is turned on for as
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* long as the mouse is overhead. Note that if "glow" and
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* underlining are both already turned on, this feature
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* will have no visible effect.
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*/
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bool isFloatEnabled () const;
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/**
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* @return the alternate pixmap (may be 0L if none was set).
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*/
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const TQPixmap* altPixmap () const;
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/**
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* Reimplemented for internal reasons, the API is not affected.
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*/
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virtual void setMargin ( int margin );
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/**
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* Reimplemented for internal reasons, the API is not affected.
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*/
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virtual void setFocusPolicy ( FocusPolicy policy );
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/**
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* Reimplemented for internal reasons, the API is not affected.
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*/
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virtual void tqsetSizePolicy ( TQSizePolicy );
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public slots:
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/**
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* Turns on or off the underlining.
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*
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* When this is on, the
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* text will be underlined. By default, it is @p true.
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*/
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void setUnderline (bool on = true);
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/**
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* Sets the URL for this label to @p url.
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*
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* @see url
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*/
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void setURL (const TQString& url);
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/**
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* Overridden for internal reasons; the API remains unaffected.
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*/
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virtual void setFont (const TQFont&);
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/**
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* Turns on or off the tool tip feature.
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*
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* When this is on, the URL will be displayed as a
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* tooltip whenever the mouse passes passes over it.
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* By default, it is @p false.
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*/
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void setUseTips (bool on = true);
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/**
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* Specifies what text to display when tooltips are turned on.
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*
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* If this is not used, the tip will default to the URL.
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*
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* @see setUseTips()
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*/
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void setTipText (const TQString& tip);
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/**
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* Sets the highlight color.
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*
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* This is the default foreground
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* color (non-selected). By default, it is @p blue.
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*/
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void setHighlightedColor(const TQColor& highcolor);
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/**
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* This is an overloaded version for convenience.
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*
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* @see setHighlightedColor()
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*/
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void setHighlightedColor(const TQString& highcolor);
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/**
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* Sets the selected color.
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*
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* This is the color the text will change
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* to when either a mouse passes over it and "glow" mode is on or
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* when it is selected (clicked). By default, it is @p red.
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*/
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void setSelectedColor(const TQColor& selcolor);
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/**
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* This is an overloaded version for convenience.
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*
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* @see setSelectedColor()
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*/
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void setSelectedColor(const TQString& selcolor);
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/**
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* Overridden for internal reasons; the API remains unaffected.
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*/
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virtual void setCursor ( const TQCursor& cursor );
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/**
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* Overridden for internal reasons; the API remains unaffected.
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*/
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virtual void unsetCursor ();
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/**
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* Turns the custom cursor feature on or off.
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*
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* When this is on, the cursor will change to a custom cursor
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* (default is a "pointing hand") whenever the cursor passes
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* over the label. By default, it is on.
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*
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* @param on whether a custom cursor should be displayed.
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* @param cursor is the custom cursor. @p 0L indicates the default "hand cursor".
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*/
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void setUseCursor (bool on, TQCursor* cursor = 0L);
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/**
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* Turns on or off the "glow" feature.
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*
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* When this is on, the text will switch to the
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* selected color whenever the mouse
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* passes over it. By default, it is @p true.
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*/
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void setGlow (bool glow = true);
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/**
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* Turns on or off the "float" feature.
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*
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* This feature is very similar to the "glow" feature in
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* that the color of the label switches to the selected
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* color when the cursor passes over it. In addition,
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* underlining is turned on for as long as the mouse is overhead.
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* Note that if "glow" and underlining are both already turned
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* on, this feature will have no visible effect.
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* By default, it is @p false.
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*/
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void setFloat (bool do_float = true);
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/**
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* Sets the "alt" pixmap.
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*
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* This pixmap will be displayed when the
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* cursor passes over the label. The effect is similar to the
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* trick done with 'onMouseOver' in javascript.
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*
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* @see altPixmap()
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*/
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void setAltPixmap (const TQPixmap& altPix);
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signals:
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/**
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* Emitted when the mouse has passed over the label.
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*
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* @param url The URL for this label.
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*/
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void enteredURL (const TQString& url);
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/**
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* Emitted when the mouse has passed over the label.
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*/
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void enteredURL ();
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/**
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* Emitted when the mouse is no longer over the label.
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*
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* @param url The URL for this label.
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*/
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void leftURL (const TQString& url);
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/**
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* Emitted when the mouse is no longer over the label.
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*/
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void leftURL ();
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/**
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* Emitted when the user clicked the left mouse button on this label.
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*
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* @param url The URL for this label.
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*/
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void leftClickedURL(const TQString& url);
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/**
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* Emitted when the user clicked the left mouse button on this label.
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*/
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void leftClickedURL();
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/**
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* Emitted when the user clicked the right mouse button on this label.
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*
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* @param url The URL for this label.
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*/
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void rightClickedURL(const TQString& url);
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/**
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* Emitted when the user clicked the right mouse button on this label.
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*/
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void rightClickedURL();
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/**
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* Emitted when the user clicked the middle mouse button on this label.
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*
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* @param url The URL for this label.
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*/
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void middleClickedURL(const TQString& url);
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/**
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* Emitted when the user clicked the left mouse button on this label.
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*/
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void middleClickedURL();
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protected:
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/**
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* Overridden for internal reasons; the API remains unaffected.
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*/
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virtual void mouseReleaseEvent ( TQMouseEvent * e );
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/**
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* Overridden for internal reasons; the API remains unaffected.
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*/
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virtual void enterEvent (TQEvent*);
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/**
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* Overridden for internal reasons; the API remains unaffected.
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*/
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virtual void leaveEvent (TQEvent*);
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/**
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* Catch parent palette changes
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*/
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virtual bool event (TQEvent *e);
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/**
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*
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*/
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TQRect activeRect() const;
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private slots:
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/**
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* @internal
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* Slot used to reset the link-color to normal (timer-driven).
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*/
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void updateColor ();
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private:
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/**
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* @internal
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* A private helper function to set the link-color to @p col.
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*/
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void setLinkColor (const TQColor& col);
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protected:
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virtual void virtual_hook( int id, void* data );
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private:
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class Private;
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Private* d;
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};
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#endif // KURLLABEL_H
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