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tdelibs/kdeui/kurllabel.h

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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 <tqlabel.h>
#include <kdelibs_export.h>
class TQColor;
class TQCursor;
class TQPixmap;
/**
* @short A drop-in tqreplacement for TQLabel that displays hyperlinks.
*
* KURLLabel is a drop-in tqreplacement for TQLabel 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, TQT_SIGNAL(leftClickedURL(const TQString&)),
* TQT_SLOT(processMyURL(const TQString&)));
* \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 (TQString url READ url WRITE setURL)
Q_PROPERTY (TQString tipText READ tipText WRITE setTipText )
Q_PROPERTY (TQPixmap 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 TQListView::setPixmap()
* to set the resp. properties.
*/
KURLLabel (TQWidget* 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 TQString::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 TQLabel, which in turn passes
* them further down
*/
KURLLabel (const TQString& url, const TQString& text = TQString::null,
TQWidget* parent = 0L, const char* name = 0L);
/**
* Destructs the label.
*/
virtual ~KURLLabel ();
/**
* Returns the URL.
*/
const TQString& url () const;
/**
* Returns the current tooltip text.
*/
const TQString& 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 TQPixmap* 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 tqsetSizePolicy ( TQSizePolicy );
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 TQString& url);
/**
* Overridden for internal reasons; the API remains unaffected.
*/
virtual void setFont (const TQFont&);
/**
* 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 TQString& tip);
/**
* Sets the highlight color.
*
* This is the default foreground
* color (non-selected). By default, it is @p blue.
*/
void setHighlightedColor(const TQColor& highcolor);
/**
* This is an overloaded version for convenience.
*
* @see setHighlightedColor()
*/
void setHighlightedColor(const TQString& 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 TQColor& selcolor);
/**
* This is an overloaded version for convenience.
*
* @see setSelectedColor()
*/
void setSelectedColor(const TQString& selcolor);
/**
* Overridden for internal reasons; the API remains unaffected.
*/
virtual void setCursor ( const TQCursor& 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, TQCursor* 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 TQPixmap& altPix);
signals:
/**
* Emitted when the mouse has passed over the label.
*
* @param url The URL for this label.
*/
void enteredURL (const TQString& 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 TQString& 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 TQString& 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 TQString& 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 TQString& 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 ( TQMouseEvent * e );
/**
* Overridden for internal reasons; the API remains unaffected.
*/
virtual void enterEvent (TQEvent*);
/**
* Overridden for internal reasons; the API remains unaffected.
*/
virtual void leaveEvent (TQEvent*);
/**
* Catch parent palette changes
*/
virtual bool event (TQEvent *e);
/**
*
*/
TQRect 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 TQColor& col);
protected:
virtual void virtual_hook( int id, void* data );
private:
class Private;
Private* d;
};
#endif // KURLLABEL_H