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755 lines
20 KiB
755 lines
20 KiB
/****************************************************************************
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**
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** Implementation of QFrame widget class
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**
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** Created : 950201
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**
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of the widgets module of the Qt GUI Toolkit.
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**
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** This file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free
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** Software Foundation and appearing in the files LICENSE.GPL2
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** and LICENSE.GPL3 included in the packaging of this file.
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** Alternatively you may (at your option) use any later version
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** of the GNU General Public License if such license has been
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** publicly approved by Trolltech ASA (or its successors, if any)
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** and the KDE Free Qt Foundation.
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**
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** Please review the following information to ensure GNU General
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** Public Licensing requirements will be met:
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** http://trolltech.com/products/qt/licenses/licensing/opensource/.
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** If you are unsure which license is appropriate for your use, please
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** review the following information:
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** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
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** or contact the sales department at sales@trolltech.com.
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**
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** This file may be used under the terms of the Q Public License as
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** defined by Trolltech ASA and appearing in the file LICENSE.QPL
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** included in the packaging of this file. Licensees holding valid Qt
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** Commercial licenses may use this file in accordance with the Qt
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** Commercial License Agreement provided with the Software.
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**
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** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
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** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
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** herein.
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**
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**********************************************************************/
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#include "qframe.h"
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#ifndef QT_NO_FRAME
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#include "qpainter.h"
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#include "qdrawutil.h"
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#include "qframe.h"
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#include "qbitmap.h"
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#include "qstyle.h"
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/*!
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\class QFrame
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\brief The QFrame class is the base class of widgets that can have a frame.
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\ingroup abstractwidgets
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It draws a frame and calls a virtual function, drawContents(), to
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fill in the frame. This function is reimplemented by subclasses.
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There are also two other less useful functions: drawFrame() and
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frameChanged().
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QPopupMenu uses this to "raise" the menu above the surrounding
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screen. QProgressBar has a "sunken" look. QLabel has a flat look.
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The frames of widgets like these can be changed.
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\code
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QLabel label(...);
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label.setFrameStyle( QFrame::Panel | QFrame::Raised );
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label.setLineWidth( 2 );
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QProgressBar pbar(...);
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label.setFrameStyle( QFrame::NoFrame );
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\endcode
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The QFrame class can also be used directly for creating simple
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frames without any contents, although usually you would use a
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QHBox or QVBox because they automatically lay out the widgets you
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put inside the frame.
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A frame widget has four attributes: frameStyle(), lineWidth(),
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midLineWidth(), and margin().
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The frame style is specified by a \link QFrame::Shape frame
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shape\endlink and a \link QFrame::Shadow shadow style\endlink. The
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frame shapes are \c NoFrame, \c Box, \c Panel, \c StyledPanel, \c
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PopupPanel, \c WinPanel, \c ToolBarPanel, \c MenuBarPanel, \c
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HLine and \c VLine; the shadow styles are \c Plain, \c Raised and
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\c Sunken.
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The line width is the width of the frame border.
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The mid-line width specifies the width of an extra line in the
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middle of the frame, which uses a third color to obtain a special
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3D effect. Notice that a mid-line is only drawn for \c Box, \c
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HLine and \c VLine frames that are raised or sunken.
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The margin is the gap between the frame and the contents of the
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frame.
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\target picture
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This table shows the most useful combinations of styles and widths
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(and some rather useless ones):
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\img frames.png Table of frame styles
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*/
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/*!
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\enum QFrame::Shape
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This enum type defines the shapes of a QFrame's frame.
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\value NoFrame QFrame draws nothing
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\value Box QFrame draws a box around its contents
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\value Panel QFrame draws a panel to make the contents appear
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raised or sunken
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\value StyledPanel draws a rectangular panel with a look that
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depends on the current GUI style. It can be raised or sunken.
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\value HLine QFrame draws a horizontal line that frames nothing
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(useful as separator)
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\value VLine QFrame draws a vertical line that frames nothing
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(useful as separator)
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\value GroupBoxPanel draws a rectangular panel
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\value WinPanel draws a rectangular panel that can be raised or
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sunken like those in Windows 95. Specifying this shape sets
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the line width to 2 pixels. WinPanel is provided for compatibility.
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For GUI style independence we recommend using StyledPanel instead.
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\value ToolBarPanel
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\value MenuBarPanel
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\value PopupPanel
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\value LineEditPanel is used to draw a frame suitable for line edits. The
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look depends upon the current GUI style.
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\value TabWidgetPanel is used to draw a frame suitable for tab widgets. The
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look depends upon the current GUI style.
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\value MShape internal mask
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When it does not call QStyle, Shape interacts with QFrame::Shadow,
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the lineWidth() and the midLineWidth() to create the total result.
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See the \link #picture picture of the frames\endlink in the class
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description.
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\sa QFrame::Shadow QFrame::style() QStyle::drawPrimitive()
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*/
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/*!
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\enum QFrame::Shadow
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This enum type defines the 3D effect used for QFrame's frame.
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\value Plain the frame and contents appear level with the
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surroundings; draws using the palette foreground color (without
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any 3D effect)
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\value Raised the frame and contents appear raised; draws a 3D
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raised line using the light and dark colors of the current color
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group
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\value Sunken the frame and contents appear sunken; draws a 3D
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sunken line using the light and dark colors of the current color
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group
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\value MShadow internal; mask for the shadow
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Shadow interacts with QFrame::Shape, the lineWidth() and the
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midLineWidth(). See the \link #picture picture of the frames\endlink
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in the class description.
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\sa QFrame::Shape lineWidth() midLineWidth()
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*/
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/*!
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Constructs a frame widget with frame style \c NoFrame and a
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1-pixel frame width.
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The \a parent, \a name and \a f arguments are passed to the
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QWidget constructor.
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*/
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QFrame::QFrame( QWidget *parent, const char *name, WFlags f )
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: QWidget( parent, name, f )
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{
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frect = QRect( 0, 0, 0, 0 );
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fstyle = NoFrame | Plain;
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lwidth = 1;
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mwidth = 0;
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mlwidth = 0;
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updateFrameWidth();
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}
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static const int wpwidth = 2; // WinPanel lwidth
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/*!
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\fn int QFrame::frameStyle() const
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Returns the frame style.
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The default value is QFrame::NoFrame.
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\sa setFrameStyle(), frameShape(), frameShadow()
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*/
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/*!
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\property QFrame::frameShape
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\brief the frame shape value from the frame style
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\sa frameStyle(), frameShadow()
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*/
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/*!
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\property QFrame::frameShadow
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\brief the frame shadow value from the frame style
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\sa frameStyle(), frameShape()
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*/
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/*!
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Sets the frame style to \a style.
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The \a style is the bitwise OR between a frame shape and a frame
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shadow style. See the \link #picture illustration\endlink in the
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class documentation.
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The frame shapes are given in \l{QFrame::Shape} and the shadow
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styles in \l{QFrame::Shadow}.
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If a mid-line width greater than 0 is specified, an additional
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line is drawn for \c Raised or \c Sunken \c Box, \c HLine, and \c
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VLine frames. The mid-color of the current color group is used for
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drawing middle lines.
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\sa \link #picture Illustration\endlink, frameStyle(),
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colorGroup(), QColorGroup
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*/
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void QFrame::setFrameStyle( int style )
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{
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if ( !testWState( WState_OwnSizePolicy ) ) {
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switch ( style & MShape ) {
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case HLine:
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setSizePolicy( QSizePolicy::Minimum, QSizePolicy::Fixed );
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break;
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case VLine:
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setSizePolicy( QSizePolicy::Fixed, QSizePolicy::Minimum );
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break;
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default:
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if ( (fstyle & MShape) == HLine || (fstyle & MShape) == VLine)
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setSizePolicy( QSizePolicy::Preferred, QSizePolicy::Preferred );
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}
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clearWState( WState_OwnSizePolicy );
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}
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fstyle = (short)style;
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updateFrameWidth( TRUE );
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}
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/*!
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\property QFrame::lineWidth
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\brief the line width
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Note that the \e total line width for \c HLine and \c VLine is
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given by frameWidth(), not lineWidth().
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The default value is 1.
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\sa midLineWidth(), frameWidth()
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*/
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void QFrame::setLineWidth( int w )
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{
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lwidth = (short)w;
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updateFrameWidth();
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}
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/*!
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\property QFrame::midLineWidth
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\brief the width of the mid-line
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The default value is 0.
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\sa lineWidth(), frameWidth()
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*/
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void QFrame::setMidLineWidth( int w )
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{
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mlwidth = (short)w;
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updateFrameWidth();
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}
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/*!
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\property QFrame::margin
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\brief the width of the margin
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The margin is the distance between the innermost pixel of the
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frame and the outermost pixel of contentsRect(). It is included in
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frameWidth().
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The margin is filled according to backgroundMode().
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The default value is 0.
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\sa setMargin(), lineWidth(), frameWidth()
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*/
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void QFrame::setMargin( int w )
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{
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mwidth = (short)w;
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updateFrameWidth();
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}
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/*!
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\internal
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Updated the fwidth parameter.
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*/
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void QFrame::updateFrameWidth( bool resetLineMetrics )
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{
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int frameType = fstyle & MShape;
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int frameStyle = fstyle & MShadow;
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if ( resetLineMetrics ) {
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switch ( frameType ) {
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case MenuBarPanel:
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mwidth = 0;
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lwidth = style().pixelMetric( QStyle::PM_MenuBarFrameWidth, this );
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break;
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case ToolBarPanel:
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mwidth = 0;
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lwidth = style().pixelMetric( QStyle::PM_DockWindowFrameWidth, this );
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break;
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case LineEditPanel:
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case TabWidgetPanel:
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case PopupPanel:
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mwidth = 0;
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lwidth = style().pixelMetric( QStyle::PM_DefaultFrameWidth, this );
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break;
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}
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}
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fwidth = -1;
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switch ( frameType ) {
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case NoFrame:
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fwidth = 0;
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break;
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case Box:
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switch ( frameStyle ) {
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case Plain:
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fwidth = lwidth;
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break;
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case Raised:
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case Sunken:
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fwidth = (short)(lwidth*2 + midLineWidth() );
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break;
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}
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break;
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case LineEditPanel:
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case TabWidgetPanel:
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case PopupPanel:
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case GroupBoxPanel:
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case Panel:
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case StyledPanel:
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switch ( frameStyle ) {
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case Plain:
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case Raised:
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case Sunken:
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fwidth = lwidth;
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break;
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}
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break;
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case WinPanel:
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switch ( frameStyle ) {
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case Plain:
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case Raised:
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case Sunken:
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fwidth = wpwidth; //WinPanel does not use lwidth!
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break;
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}
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break;
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case MenuBarPanel:
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fwidth = lwidth;
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break;
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case ToolBarPanel:
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fwidth = lwidth;
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break;
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case HLine:
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case VLine:
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switch ( frameStyle ) {
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case Plain:
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fwidth = lwidth;
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break;
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case Raised:
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case Sunken:
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fwidth = (short)(lwidth*2 + midLineWidth());
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break;
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}
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break;
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}
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if ( fwidth == -1 ) // invalid style
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fwidth = 0;
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fwidth += margin();
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frameChanged();
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}
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/*!
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\property QFrame::frameWidth
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\brief the width of the frame that is drawn.
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Note that the frame width depends on the \link
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QFrame::setFrameStyle() frame style \endlink, not only the line
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width and the mid-line width. For example, the style \c NoFrame
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always has a frame width of 0, whereas the style \c Panel has a
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frame width equivalent to the line width. The frame width also
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includes the margin.
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\sa lineWidth(), midLineWidth(), frameStyle(), margin()
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*/
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/*!
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\property QFrame::frameRect
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\brief the frame rectangle
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The frame rectangle is the rectangle the frame is drawn in. By
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default, this is the entire widget. Setting this property does \e
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not cause a widget update.
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If this property is set to a null rectangle (for example
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\c{QRect(0, 0, 0, 0)}), then the frame rectangle is equivalent to
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the \link QWidget::rect() widget rectangle\endlink.
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\sa contentsRect()
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*/
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QRect QFrame::frameRect() const
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{
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if ( frect.isNull() )
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return rect();
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else
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return frect;
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}
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void QFrame::setFrameRect( const QRect &r )
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{
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frect = r.isValid() ? r : rect();
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}
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/*!
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\property QFrame::contentsRect
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\brief the rectangle inside the frame
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\sa frameRect(), drawContents()
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*/
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QRect QFrame::contentsRect() const
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{
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QRect r = frameRect();
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int w = frameWidth(); // total width
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int frameType = fstyle & MShape;
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if (frameType == PopupPanel) {
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int vExtra = style().pixelMetric(QStyle::PM_PopupMenuFrameVerticalExtra, this);
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int hExtra = style().pixelMetric(QStyle::PM_PopupMenuFrameHorizontalExtra, this);
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r.setRect( r.x()+w+hExtra, r.y()+w+vExtra, r.width()-w*2-hExtra*2, r.height()-w*2-vExtra*2 );
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} else {
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r.setRect( r.x()+w, r.y()+w, r.width()-w*2, r.height()-w*2 );
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}
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return r;
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}
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/*!\reimp
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*/
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QSize QFrame::sizeHint() const
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{
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// Returns a size hint for the frame - for HLine and VLine
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// shapes, this is stretchable one way and 3 pixels wide the
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// other. For other shapes, QWidget::sizeHint() is used.
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switch (fstyle & MShape) {
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case HLine:
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return QSize(-1,3);
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case VLine:
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return QSize(3,-1);
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default:
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return QWidget::sizeHint();
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}
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}
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/*!
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Processes the paint event \a event.
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Paints the frame and the contents.
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Opens the painter on the frame and calls drawFrame(), then
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drawContents().
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*/
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void QFrame::paintEvent( QPaintEvent *event )
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{
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const int m = margin();
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if ( m && testWFlags( WNoAutoErase ) ) {
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QRect r = contentsRect();
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r.addCoords( -m, -m, m, m );
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erase( event->region().intersect( QRegion( r ) - contentsRect() ) );
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}
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QPainter paint( this );
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if ( !contentsRect().contains( event->rect() ) ) {
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paint.save();
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paint.setClipRegion( event->region().intersect(frameRect()) );
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drawFrame( &paint );
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paint.restore();
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}
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if ( event->rect().intersects( contentsRect() ) &&
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(fstyle & MShape) != HLine && (fstyle & MShape) != VLine ) {
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paint.setClipRegion( event->region().intersect( contentsRect() ) );
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drawContents( &paint );
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}
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}
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/*!
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Processes the resize event \a e.
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Adjusts the frame rectangle for the resized widget. The frame
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rectangle is elastic, and the surrounding area is static.
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The resulting frame rectangle may be null or invalid. You can use
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setMinimumSize() to avoid those possibilities.
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Nothing is done if the frame rectangle is a \link QRect::isNull()
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null rectangle\endlink already.
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*/
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void QFrame::resizeEvent( QResizeEvent *e )
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{
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if ( !frect.isNull() ) {
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QRect r( frect.x(), frect.y(),
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width() - (e->oldSize().width() - frect.width()),
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height() - (e->oldSize().height() - frect.height()) );
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setFrameRect( r );
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}
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QWidget::resizeEvent( e );
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}
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|
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/*!
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Draws the frame using the painter \a p and the current frame
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attributes and color group. The rectangle inside the frame is not
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affected.
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This function is virtual, but in general you do not need to
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reimplement it. If you do, note that the QPainter is already open
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and must remain open.
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\sa frameRect(), contentsRect(), drawContents(), frameStyle(), setPalette()
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*/
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void QFrame::drawFrame( QPainter *p )
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{
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QPoint p1, p2;
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QRect r = frameRect();
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int type = fstyle & MShape;
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int cstyle = fstyle & MShadow;
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#ifdef QT_NO_DRAWUTIL
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p->setPen( black ); // ####
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p->drawRect( r ); //### a bit too simple
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#else
|
|
const QColorGroup & g = colorGroup();
|
|
|
|
#ifndef QT_NO_STYLE
|
|
QStyleOption opt(lineWidth(),midLineWidth());
|
|
|
|
QStyle::SFlags flags = QStyle::Style_Default;
|
|
if (isEnabled())
|
|
flags |= QStyle::Style_Enabled;
|
|
if (cstyle == Sunken)
|
|
flags |= QStyle::Style_Sunken;
|
|
else if (cstyle == Raised)
|
|
flags |= QStyle::Style_Raised;
|
|
if (hasFocus())
|
|
flags |= QStyle::Style_HasFocus;
|
|
if (hasMouse())
|
|
flags |= QStyle::Style_MouseOver;
|
|
#endif // QT_NO_STYLE
|
|
|
|
switch ( type ) {
|
|
|
|
case Box:
|
|
if ( cstyle == Plain )
|
|
qDrawPlainRect( p, r, g.foreground(), lwidth );
|
|
else
|
|
qDrawShadeRect( p, r, g, cstyle == Sunken, lwidth,
|
|
midLineWidth() );
|
|
break;
|
|
|
|
case LineEditPanel:
|
|
style().drawPrimitive( QStyle::PE_PanelLineEdit, p, r, g, flags, opt );
|
|
break;
|
|
|
|
case GroupBoxPanel:
|
|
style().drawPrimitive( QStyle::PE_PanelGroupBox, p, r, g, flags, opt );
|
|
break;
|
|
|
|
case TabWidgetPanel:
|
|
style().drawPrimitive( QStyle::PE_PanelTabWidget, p, r, g, flags, opt );
|
|
break;
|
|
|
|
case MenuBarPanel:
|
|
#ifndef QT_NO_STYLE
|
|
style().drawPrimitive(QStyle::PE_PanelMenuBar, p, r, g, flags, opt);
|
|
break;
|
|
#endif // fall through to Panel if QT_NO_STYLE
|
|
|
|
case ToolBarPanel:
|
|
#ifndef QT_NO_STYLE
|
|
style().drawPrimitive( QStyle::PE_PanelDockWindow, p, rect(), g, flags, opt);
|
|
break;
|
|
#endif // fall through to Panel if QT_NO_STYLE
|
|
|
|
case StyledPanel:
|
|
#ifndef QT_NO_STYLE
|
|
if ( cstyle == Plain )
|
|
qDrawPlainRect( p, r, g.foreground(), lwidth );
|
|
else
|
|
style().drawPrimitive(QStyle::PE_Panel, p, r, g, flags, opt);
|
|
break;
|
|
#endif // fall through to Panel if QT_NO_STYLE
|
|
|
|
case PopupPanel:
|
|
#ifndef QT_NO_STYLE
|
|
{
|
|
int vextra = style().pixelMetric(QStyle::PM_PopupMenuFrameVerticalExtra, this),
|
|
hextra = style().pixelMetric(QStyle::PM_PopupMenuFrameHorizontalExtra, this);
|
|
if(vextra > 0 || hextra > 0) {
|
|
QRect fr = frameRect();
|
|
int fw = frameWidth();
|
|
if(vextra > 0) {
|
|
style().drawControl(QStyle::CE_PopupMenuVerticalExtra, p, this,
|
|
QRect(fr.x() + fw, fr.y() + fw, fr.width() - (fw*2), vextra),
|
|
g, flags, opt);
|
|
style().drawControl(QStyle::CE_PopupMenuVerticalExtra, p, this,
|
|
QRect(fr.x() + fw, fr.bottom() - fw - vextra, fr.width() - (fw*2), vextra),
|
|
g, flags, opt);
|
|
}
|
|
if(hextra > 0) {
|
|
style().drawControl(QStyle::CE_PopupMenuHorizontalExtra, p, this,
|
|
QRect(fr.x() + fw, fr.y() + fw + vextra, hextra, fr.height() - (fw*2) - vextra),
|
|
g, flags, opt);
|
|
style().drawControl(QStyle::CE_PopupMenuHorizontalExtra, p, this,
|
|
QRect(fr.right() - fw - hextra, fr.y() + fw + vextra, hextra, fr.height() - (fw*2) - vextra),
|
|
g, flags, opt);
|
|
}
|
|
}
|
|
|
|
if ( cstyle == Plain )
|
|
qDrawPlainRect( p, r, g.foreground(), lwidth );
|
|
else
|
|
style().drawPrimitive(QStyle::PE_PanelPopup, p, r, g, flags, opt);
|
|
break;
|
|
}
|
|
#endif // fall through to Panel if QT_NO_STYLE
|
|
|
|
case Panel:
|
|
if ( cstyle == Plain )
|
|
qDrawPlainRect( p, r, g.foreground(), lwidth );
|
|
else
|
|
qDrawShadePanel( p, r, g, cstyle == Sunken, lwidth );
|
|
break;
|
|
|
|
case WinPanel:
|
|
if ( cstyle == Plain )
|
|
qDrawPlainRect( p, r, g.foreground(), wpwidth );
|
|
else
|
|
qDrawWinPanel( p, r, g, cstyle == Sunken );
|
|
break;
|
|
case HLine:
|
|
case VLine:
|
|
if ( type == HLine ) {
|
|
p1 = QPoint( r.x(), r.height()/2 );
|
|
p2 = QPoint( r.x()+r.width(), p1.y() );
|
|
}
|
|
else {
|
|
p1 = QPoint( r.x()+r.width()/2, 0 );
|
|
p2 = QPoint( p1.x(), r.height() );
|
|
}
|
|
if ( cstyle == Plain ) {
|
|
QPen oldPen = p->pen();
|
|
p->setPen( QPen(g.foreground(),lwidth) );
|
|
p->drawLine( p1, p2 );
|
|
p->setPen( oldPen );
|
|
}
|
|
else
|
|
qDrawShadeLine( p, p1, p2, g, cstyle == Sunken,
|
|
lwidth, midLineWidth() );
|
|
break;
|
|
}
|
|
#endif // QT_NO_DRAWUTIL
|
|
}
|
|
|
|
|
|
/*!
|
|
Virtual function that draws the contents of the frame.
|
|
|
|
The QPainter is already open when you get it, and you must leave
|
|
it open. Painter \link QPainter::setWorldMatrix()
|
|
transformations\endlink are switched off on entry. If you
|
|
transform the painter, remember to take the frame into account and
|
|
\link QPainter::resetXForm() reset transformation\endlink before
|
|
returning.
|
|
|
|
This function is reimplemented by subclasses that draw something
|
|
inside the frame. It should only draw inside contentsRect(). The
|
|
default function does nothing.
|
|
|
|
\sa contentsRect(), QPainter::setClipRect()
|
|
*/
|
|
|
|
void QFrame::drawContents( QPainter * )
|
|
{
|
|
}
|
|
|
|
|
|
/*!
|
|
Virtual function that is called when the frame style, line width
|
|
or mid-line width changes.
|
|
|
|
This function can be reimplemented by subclasses that need to know
|
|
when the frame attributes change.
|
|
|
|
The default implementation calls update().
|
|
*/
|
|
|
|
void QFrame::frameChanged()
|
|
{
|
|
update();
|
|
updateGeometry();
|
|
}
|
|
|
|
/*!\reimp
|
|
*/
|
|
void QFrame::styleChange( QStyle& old )
|
|
{
|
|
updateFrameWidth( TRUE );
|
|
QWidget::styleChange( old );
|
|
}
|
|
|
|
#endif //QT_NO_FRAME
|