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Diffstat (limited to 'kexi/widget/utils/kexigradientwidget.h')
| -rw-r--r-- | kexi/widget/utils/kexigradientwidget.h | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/kexi/widget/utils/kexigradientwidget.h b/kexi/widget/utils/kexigradientwidget.h new file mode 100644 index 00000000..0032e7b1 --- /dev/null +++ b/kexi/widget/utils/kexigradientwidget.h @@ -0,0 +1,247 @@ +/* This file is part of the KDE project + Copyright (C) 2005 Christian Nitschkowski <segfault_ii@web.de> + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU Library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this program; see the file COPYING. If not, write to + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. +*/ + +#ifndef KEXIGRADIENTWIDGET_H +#define KEXIGRADIENTWIDGET_H + +#include <qtimer.h> +#include <qwidget.h> + +#include <kimageeffect.h> +#include <kpixmap.h> + +#define REBUILD_DELAY 100 + +//! @short A simple widget that can use different types of gradients as the background. +/*! + @author Christian Nitschkowski +*/ +class KEXIGUIUTILS_EXPORT KexiGradientWidget : public QWidget { + typedef QPtrList<QWidget> WidgetList; + + Q_OBJECT + Q_PROPERTY(DisplayMode displayMode READ displayMode WRITE setDisplayMode DESIGNABLE true) + Q_PROPERTY(GradientType gradientType READ gradientType WRITE setGradientType DESIGNABLE true) + Q_PROPERTY(QColor gradientColor1 READ gradientColor1 WRITE setGradientColor1 DESIGNABLE true) + Q_PROPERTY(QColor gradientColor2 READ gradientColor2 WRITE setGradientColor2 DESIGNABLE true) + Q_PROPERTY(double blendOpacity READ blendOpacity WRITE setBlendOpacity DESIGNABLE true) + Q_ENUMS( DisplayMode GradientType ) + + public: + /*! + Modes for displaying the gradient. + */ + enum DisplayMode { + NoGradient, //!< No gradient at all. Will behave just like a QWidget + FadedGradient, //!< Gradient will be faded with the widgets background + SimpleGradient //!< Gradient will replace the usual widget background + }; + + /*! + Gradient type specification. + See GradientType for more details (part of the KDEFX library) + */ + enum GradientType { + VerticalGradient = KImageEffect::VerticalGradient, + HorizontalGradient = KImageEffect::HorizontalGradient, + DiagonalGradient = KImageEffect::DiagonalGradient, + CrossDiagonalGradient = KImageEffect::CrossDiagonalGradient, + PyramidGradient = KImageEffect::PyramidGradient, + RectangleGradient = KImageEffect::RectangleGradient, + PipeCrossGradient = KImageEffect::PipeCrossGradient, + EllipticGradient = KImageEffect::EllipticGradient + }; + + KexiGradientWidget( QWidget *parent = 0, const char *name = 0, WFlags f = 0 ); + + virtual ~KexiGradientWidget(); + + virtual void setPaletteBackgroundPixmap( const QPixmap& pixmap ) { + p_backgroundPixmap = pixmap; + p_rebuildDelayTimer.start( REBUILD_DELAY, true ); + } + + virtual const QColor& paletteBackgroundColor() const; + + /*! + Set the displaymode \a mode. + The widget will be updated automatically. + */ + void setDisplayMode( DisplayMode mode ) { + p_displayMode = mode; + p_cacheDirty = true; + update(); + } + + /*! + Get the current displaymode. + */ + DisplayMode displayMode() const { + return p_displayMode; + } + + /*! + Set the gradient-type. + */ + void setGradientType( GradientType type ) { + p_gradientType = type; + p_cacheDirty = true; + update(); + } + + /*! + Get the current gradient-type. + */ + GradientType gradientType() const { + return p_gradientType; + } + + /*! Set color #1 for the gradient-effect. + \a color is the new color. */ + void setGradientColor1( const QColor& color ) { + p_color1 = color; + p_cacheDirty = true; + } + + /*! Set color #2 for the gradient-effect. + \a color is the new color. */ + void setGradientColor2( const QColor& color ) { + p_color2 = color; + p_cacheDirty = true; + } + + /*! + Set both colors for the gradient. + \a color1 is the first color, + \a color2 the second. + */ + void setGradientColors( const QColor& color1, const QColor& color2 ) { + p_color1 = color1; + p_color2 = color2; + p_cacheDirty = true; + } + + /*! \return the color #1 used for the gradient. */ + QColor gradientColor1() const { return p_color1; } + + /*! \return the color #2 used for the gradient. */ + QColor gradientColor2() const { return p_color2; } + + /*! + Sets the opacity of the gradient when fading with background. + \a opacity has to be between 0.0 and 1.0. + */ + void setBlendOpacity( double opacity ) { + p_opacity = opacity; + p_cacheDirty = true; + } + + double blendOpacity() const { return p_opacity; } + + public slots: + virtual void setPaletteBackgroundColor( const QColor& color ); + + protected: + virtual bool eventFilter( QObject* object, QEvent* event ); + virtual void enabledChange( bool enabled ) { + p_cacheDirty = true; + QWidget::enabledChange( enabled ); + } + + virtual void paletteChange( const QPalette& pal ) { + p_cacheDirty = true; + QWidget::paletteChange( pal ); + } + + virtual void paintEvent( QPaintEvent* e ); + + virtual void resizeEvent( QResizeEvent* e ) { + p_rebuildDelayTimer.start( REBUILD_DELAY, true ); + QWidget::resizeEvent( e ); + } + + virtual void styleChange( QStyle& style ) { + p_cacheDirty = true; + QWidget::styleChange( style ); + } + + private: + /*! + Builds a list of children of \a p. + Only widgets that work correctly with KexiGradientWidget + will be in this list. + The results will be stored in \a list. + The method recursively calls itself until all children of \a p + have been found and stored in the list. + */ + static void buildChildrenList( WidgetList& list, QWidget* p ); + /*! + \a return if the \a child is a widget that should + get a background set. + */ + static bool isValidChildWidget( QObject* child ); + + /*! + Rebuilds the cache completely. + This is done automatically if necessary. + */ + void rebuildCache(); + + /*! + Sets the background of \a childWidget. + This is necessary when the child has been moved. + For performance-reasons this is used only for Move-events. + The same code is used for PaletteChange-events, but in a + different location. + */ + void updateChildBackground( QWidget* childWidget ); + + private: + WidgetList p_knownWidgets; + WidgetList p_customBackgroundWidgets; + DisplayMode p_displayMode; + GradientType p_gradientType; + KPixmap p_backgroundPixmap; + QColor p_color1; + QColor p_color2; + QTimer p_rebuildDelayTimer; + QWidget* p_currentChild; + double p_opacity; + bool p_cacheDirty; + + QColor p_backgroundColor; + + public slots: + /*! + The cache needs to be rebuild once the widget + is set up completely. + */ + virtual void polish() { + QWidget::polish(); + rebuildCache(); + } + + private slots: + void setCacheDirty() { + rebuildCache(); + } + + }; + +#endif |