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|
/****************************************************************************
**
** Implementation of TQFrame widget class
**
** Created : 950201
**
** Copyright (C) 2010 Timothy Pearson and (C) 1992-2008 Trolltech ASA.
**
** This file is part of the widgets module of the TQt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
** included in the packaging of this file. Licensees holding valid TQt
** Commercial licenses may use this file in accordance with the TQt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#include "tqframe.h"
#ifndef TQT_NO_FRAME
#include "tqpainter.h"
#include "tqdrawutil.h"
#include "tqframe.h"
#include "tqbitmap.h"
#include "tqstyle.h"
/*!
\class TQFrame
\brief The TQFrame class is the base class of widgets that can have a frame.
\ingroup abstractwidgets
It draws a frame and calls a virtual function, drawContents(), to
fill in the frame. This function is reimplemented by subclasses.
There are also two other less useful functions: drawFrame() and
frameChanged().
TQPopupMenu uses this to "raise" the menu above the surrounding
screen. TQProgressBar has a "sunken" look. TQLabel has a flat look.
The frames of widgets like these can be changed.
\code
TQLabel label(...);
label.setFrameStyle( TQFrame::Panel | TQFrame::Raised );
label.setLineWidth( 2 );
TQProgressBar pbar(...);
label.setFrameStyle( TQFrame::NoFrame );
\endcode
The TQFrame class can also be used directly for creating simple
frames without any contents, although usually you would use a
TQHBox or TQVBox because they automatically lay out the widgets you
put inside the frame.
A frame widget has four attributes: frameStyle(), lineWidth(),
midLineWidth(), and margin().
The frame style is specified by a \link TQFrame::Shape frame
tqshape\endlink and a \link TQFrame::Shadow shadow style\endlink. The
frame tqshapes are \c NoFrame, \c Box, \c Panel, \c StyledPanel, \c
PopupPanel, \c WinPanel, \c ToolBarPanel, \c MenuBarPanel, \c
HLine and \c VLine; the shadow styles are \c Plain, \c Raised and
\c Sunken.
The line width is the width of the frame border.
The mid-line width specifies the width of an extra line in the
middle of the frame, which uses a third color to obtain a special
3D effect. Notice that a mid-line is only drawn for \c Box, \c
HLine and \c VLine frames that are raised or sunken.
The margin is the gap between the frame and the contents of the
frame.
\target picture
This table shows the most useful combinations of styles and widths
(and some rather useless ones):
\img frames.png Table of frame styles
*/
/*!
\enum TQFrame::Shape
This enum type defines the tqshapes of a TQFrame's frame.
\value NoFrame TQFrame draws nothing
\value Box TQFrame draws a box around its contents
\value Panel TQFrame draws a panel to make the contents appear
raised or sunken
\value StyledPanel draws a rectangular panel with a look that
depends on the current GUI style. It can be raised or sunken.
\value HLine TQFrame draws a horizontal line that frames nothing
(useful as separator)
\value VLine TQFrame draws a vertical line that frames nothing
(useful as separator)
\value GroupBoxPanel draws a rectangular panel
\value WinPanel draws a rectangular panel that can be raised or
sunken like those in Windows 95. Specifying this tqshape sets
the line width to 2 pixels. WinPanel is provided for compatibility.
For GUI style independence we recommend using StyledPanel instead.
\value ToolBarPanel
\value MenuBarPanel
\value PopupPanel
\value LineEditPanel is used to draw a frame suitable for line edits. The
look depends upon the current GUI style.
\value TabWidgetPanel is used to draw a frame suitable for tab widgets. The
look depends upon the current GUI style.
\value MShape internal mask
When it does not call TQStyle, Shape interacts with TQFrame::Shadow,
the lineWidth() and the midLineWidth() to create the total result.
See the \link #picture picture of the frames\endlink in the class
description.
\sa TQFrame::Shadow TQFrame::style() TQStyle::tqdrawPrimitive()
*/
/*!
\enum TQFrame::Shadow
This enum type defines the 3D effect used for TQFrame's frame.
\value Plain the frame and contents appear level with the
surroundings; draws using the palette foreground color (without
any 3D effect)
\value Raised the frame and contents appear raised; draws a 3D
raised line using the light and dark colors of the current color
group
\value Sunken the frame and contents appear sunken; draws a 3D
sunken line using the light and dark colors of the current color
group
\value MShadow internal; mask for the shadow
Shadow interacts with TQFrame::Shape, the lineWidth() and the
midLineWidth(). See the \link #picture picture of the frames\endlink
in the class description.
\sa TQFrame::Shape lineWidth() midLineWidth()
*/
/*!
Constructs a frame widget with frame style \c NoFrame and a
1-pixel frame width.
The \a parent, \a name and \a f arguments are passed to the
TQWidget constructor.
*/
TQFrame::TQFrame( TQWidget *parent, const char *name, WFlags f )
: TQWidget( parent, name, f )
{
frect = TQRect( 0, 0, 0, 0 );
fstyle = NoFrame | Plain;
lwidth = 1;
mwidth = 0;
mlwidth = 0;
updateFrameWidth();
}
static const int wpwidth = 2; // WinPanel lwidth
/*!
\fn int TQFrame::frameStyle() const
Returns the frame style.
The default value is TQFrame::NoFrame.
\sa setFrameStyle(), frameShape(), frameShadow()
*/
/*!
\property TQFrame::frameShape
\brief the frame tqshape value from the frame style
\sa frameStyle(), frameShadow()
*/
/*!
\property TQFrame::frameShadow
\brief the frame shadow value from the frame style
\sa frameStyle(), frameShape()
*/
/*!
Sets the frame style to \a style.
The \a style is the bitwise OR between a frame tqshape and a frame
shadow style. See the \link #picture illustration\endlink in the
class documentation.
The frame tqshapes are given in \l{TQFrame::Shape} and the shadow
styles in \l{TQFrame::Shadow}.
If a mid-line width greater than 0 is specified, an additional
line is drawn for \c Raised or \c Sunken \c Box, \c HLine, and \c
VLine frames. The mid-color of the current color group is used for
drawing middle lines.
\sa \link #picture Illustration\endlink, frameStyle(),
tqcolorGroup(), TQColorGroup
*/
void TQFrame::setFrameStyle( int style )
{
if ( !testWState( TQt::WState_OwnSizePolicy ) ) {
switch ( style & MShape ) {
case HLine:
tqsetSizePolicy( TQSizePolicy::Minimum, TQSizePolicy::Fixed );
break;
case VLine:
tqsetSizePolicy( TQSizePolicy::Fixed, TQSizePolicy::Minimum );
break;
default:
if ( (fstyle & MShape) == HLine || (fstyle & MShape) == VLine)
tqsetSizePolicy( TQSizePolicy::Preferred, TQSizePolicy::Preferred );
}
clearWState( TQt::WState_OwnSizePolicy );
}
fstyle = (short)style;
updateFrameWidth( TRUE );
}
/*!
\property TQFrame::lineWidth
\brief the line width
Note that the \e total line width for \c HLine and \c VLine is
given by frameWidth(), not lineWidth().
The default value is 1.
\sa midLineWidth(), frameWidth()
*/
void TQFrame::setLineWidth( int w )
{
lwidth = (short)w;
updateFrameWidth();
}
/*!
\property TQFrame::midLineWidth
\brief the width of the mid-line
The default value is 0.
\sa lineWidth(), frameWidth()
*/
void TQFrame::setMidLineWidth( int w )
{
mlwidth = (short)w;
updateFrameWidth();
}
/*!
\property TQFrame::margin
\brief the width of the margin
The margin is the distance between the innermost pixel of the
frame and the outermost pixel of contentsRect(). It is included in
frameWidth().
The margin is filled according to backgroundMode().
The default value is 0.
\sa setMargin(), lineWidth(), frameWidth()
*/
void TQFrame::setMargin( int w )
{
mwidth = (short)w;
updateFrameWidth();
}
/*!
\internal
Updated the fwidth parameter.
*/
void TQFrame::updateFrameWidth( bool resetLineMetrics )
{
int frameType = fstyle & MShape;
int frameStyle = fstyle & MShadow;
if ( resetLineMetrics ) {
switch ( frameType ) {
case MenuBarPanel:
mwidth = 0;
lwidth = tqstyle().tqpixelMetric( TQStyle::PM_MenuBarFrameWidth, this );
break;
case ToolBarPanel:
mwidth = 0;
lwidth = tqstyle().tqpixelMetric( TQStyle::PM_DockWindowFrameWidth, this );
break;
case LineEditPanel:
case TabWidgetPanel:
case PopupPanel:
mwidth = 0;
lwidth = tqstyle().tqpixelMetric( TQStyle::PM_DefaultFrameWidth, this );
break;
}
}
fwidth = -1;
switch ( frameType ) {
case NoFrame:
fwidth = 0;
break;
case Box:
switch ( frameStyle ) {
case Plain:
fwidth = lwidth;
break;
case Raised:
case Sunken:
fwidth = (short)(lwidth*2 + midLineWidth() );
break;
}
break;
case LineEditPanel:
case TabWidgetPanel:
case PopupPanel:
case GroupBoxPanel:
case Panel:
case StyledPanel:
switch ( frameStyle ) {
case Plain:
case Raised:
case Sunken:
fwidth = lwidth;
break;
}
break;
case WinPanel:
switch ( frameStyle ) {
case Plain:
case Raised:
case Sunken:
fwidth = wpwidth; //WinPanel does not use lwidth!
break;
}
break;
case MenuBarPanel:
fwidth = lwidth;
break;
case ToolBarPanel:
fwidth = lwidth;
break;
case HLine:
case VLine:
switch ( frameStyle ) {
case Plain:
fwidth = lwidth;
break;
case Raised:
case Sunken:
fwidth = (short)(lwidth*2 + midLineWidth());
break;
}
break;
}
if ( fwidth == -1 ) // invalid style
fwidth = 0;
fwidth += margin();
frameChanged();
}
/*!
\property TQFrame::frameWidth
\brief the width of the frame that is drawn.
Note that the frame width depends on the \link
TQFrame::setFrameStyle() frame style \endlink, not only the line
width and the mid-line width. For example, the style \c NoFrame
always has a frame width of 0, whereas the style \c Panel has a
frame width equivalent to the line width. The frame width also
includes the margin.
\sa lineWidth(), midLineWidth(), frameStyle(), margin()
*/
/*!
\property TQFrame::frameRect
\brief the frame rectangle
The frame rectangle is the rectangle the frame is drawn in. By
default, this is the entire widget. Setting this property does \e
not cause a widget update.
If this property is set to a null rectangle (for example
\c{TQRect(0, 0, 0, 0)}), then the frame rectangle is equivalent to
the \link TQWidget::rect() widget rectangle\endlink.
\sa contentsRect()
*/
TQRect TQFrame::frameRect() const
{
if ( frect.isNull() )
return rect();
else
return frect;
}
void TQFrame::setFrameRect( const TQRect &r )
{
frect = r.isValid() ? r : TQT_TQRECT_OBJECT(rect());
}
/*!
\property TQFrame::contentsRect
\brief the rectangle inside the frame
\sa frameRect(), drawContents()
*/
TQRect TQFrame::contentsRect() const
{
TQRect r = frameRect();
int w = frameWidth(); // total width
int frameType = fstyle & MShape;
if (frameType == PopupPanel) {
int vExtra = tqstyle().tqpixelMetric(TQStyle::PM_PopupMenuFrameVerticalExtra, this);
int hExtra = tqstyle().tqpixelMetric(TQStyle::PM_PopupMenuFrameHorizontalExtra, this);
r.setRect( r.x()+w+hExtra, r.y()+w+vExtra, r.width()-w*2-hExtra*2, r.height()-w*2-vExtra*2 );
} else {
r.setRect( r.x()+w, r.y()+w, r.width()-w*2, r.height()-w*2 );
}
return r;
}
/*!\reimp
*/
TQSize TQFrame::tqsizeHint() const
{
// Returns a size hint for the frame - for HLine and VLine
// tqshapes, this is stretchable one way and 3 pixels wide the
// other. For other tqshapes, TQWidget::tqsizeHint() is used.
switch (fstyle & MShape) {
case HLine:
return TQSize(-1,3);
case VLine:
return TQSize(3,-1);
default:
return TQWidget::tqsizeHint();
}
}
/*!
Processes the paint event \a event.
Paints the frame and the contents.
Opens the painter on the frame and calls drawFrame(), then
drawContents().
*/
void TQFrame::paintEvent( TQPaintEvent *event )
{
const int m = margin();
if ( m && testWFlags( TQt::WNoAutoErase ) ) {
TQRect r = contentsRect();
r.addCoords( -m, -m, m, m );
erase( event->region().intersect( TQRegion( r ) - contentsRect() ) );
}
TQPainter paint( this );
if ( !contentsRect().contains( event->rect() ) ) {
paint.save();
paint.setClipRegion( event->region().intersect(frameRect()) );
drawFrame( &paint );
paint.restore();
}
if ( event->rect().intersects( contentsRect() ) &&
(fstyle & MShape) != HLine && (fstyle & MShape) != VLine ) {
paint.setClipRegion( event->region().intersect( contentsRect() ) );
drawContents( &paint );
}
}
/*!
Processes the resize event \a e.
Adjusts the frame rectangle for the resized widget. The frame
rectangle is elastic, and the surrounding area is static.
The resulting frame rectangle may be null or invalid. You can use
setMinimumSize() to avoid those possibilities.
Nothing is done if the frame rectangle is a \link TQRect::isNull()
null rectangle\endlink already.
*/
void TQFrame::resizeEvent( TQResizeEvent *e )
{
if ( !frect.isNull() ) {
TQRect r( frect.x(), frect.y(),
width() - (e->oldSize().width() - frect.width()),
height() - (e->oldSize().height() - frect.height()) );
setFrameRect( r );
}
TQWidget::resizeEvent( e );
}
/*!
Draws the frame using the painter \a p and the current frame
attributes and color group. The rectangle inside the frame is not
affected.
This function is virtual, but in general you do not need to
reimplement it. If you do, note that the TQPainter is already open
and must remain open.
\sa frameRect(), contentsRect(), drawContents(), frameStyle(), setPalette()
*/
void TQFrame::drawFrame( TQPainter *p )
{
TQPoint p1, p2;
TQRect r = frameRect();
int type = fstyle & MShape;
int cstyle = fstyle & MShadow;
#ifdef TQT_NO_DRAWUTIL
p->setPen( black ); // ####
p->drawRect( r ); //### a bit too simple
#else
const TQColorGroup & g = tqcolorGroup();
#ifndef TQT_NO_STYLE
TQStyleOption opt(lineWidth(),midLineWidth());
TQStyle::SFlags flags = TQStyle::Style_Default;
if (isEnabled())
flags |= TQStyle::Style_Enabled;
if (cstyle == Sunken)
flags |= TQStyle::Style_Sunken;
else if (cstyle == Raised)
flags |= TQStyle::Style_Raised;
if (hasFocus())
flags |= TQStyle::Style_HasFocus;
if (hasMouse())
flags |= TQStyle::Style_MouseOver;
#endif // TQT_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:
tqstyle().tqdrawPrimitive( TQStyle::PE_PanelLineEdit, p, r, g, flags, opt );
break;
case GroupBoxPanel:
tqstyle().tqdrawPrimitive( TQStyle::PE_PanelGroupBox, p, r, g, flags, opt );
break;
case TabWidgetPanel:
tqstyle().tqdrawPrimitive( TQStyle::PE_PanelTabWidget, p, r, g, flags, opt );
break;
case MenuBarPanel:
#ifndef TQT_NO_STYLE
tqstyle().tqdrawPrimitive(TQStyle::PE_PanelMenuBar, p, r, g, flags, opt);
break;
#endif // fall through to Panel if TQT_NO_STYLE
case ToolBarPanel:
#ifndef TQT_NO_STYLE
tqstyle().tqdrawPrimitive( TQStyle::PE_PanelDockWindow, p, rect(), g, flags, opt);
break;
#endif // fall through to Panel if TQT_NO_STYLE
case StyledPanel:
#ifndef TQT_NO_STYLE
if ( cstyle == Plain )
qDrawPlainRect( p, r, g.foreground(), lwidth );
else
tqstyle().tqdrawPrimitive(TQStyle::PE_Panel, p, r, g, flags, opt);
break;
#endif // fall through to Panel if TQT_NO_STYLE
case PopupPanel:
#ifndef TQT_NO_STYLE
{
int vextra = tqstyle().tqpixelMetric(TQStyle::PM_PopupMenuFrameVerticalExtra, this),
hextra = tqstyle().tqpixelMetric(TQStyle::PM_PopupMenuFrameHorizontalExtra, this);
if(vextra > 0 || hextra > 0) {
TQRect fr = frameRect();
int fw = frameWidth();
if(vextra > 0) {
tqstyle().tqdrawControl(TQStyle::CE_PopupMenuVerticalExtra, p, this,
TQRect(fr.x() + fw, fr.y() + fw, fr.width() - (fw*2), vextra),
g, flags, opt);
tqstyle().tqdrawControl(TQStyle::CE_PopupMenuVerticalExtra, p, this,
TQRect(fr.x() + fw, fr.bottom() - fw - vextra, fr.width() - (fw*2), vextra),
g, flags, opt);
}
if(hextra > 0) {
tqstyle().tqdrawControl(TQStyle::CE_PopupMenuHorizontalExtra, p, this,
TQRect(fr.x() + fw, fr.y() + fw + vextra, hextra, fr.height() - (fw*2) - vextra),
g, flags, opt);
tqstyle().tqdrawControl(TQStyle::CE_PopupMenuHorizontalExtra, p, this,
TQRect(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
tqstyle().tqdrawPrimitive(TQStyle::PE_PanelPopup, p, r, g, flags, opt);
break;
}
#endif // fall through to Panel if TQT_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 = TQPoint( r.x(), r.height()/2 );
p2 = TQPoint( r.x()+r.width(), p1.y() );
}
else {
p1 = TQPoint( r.x()+r.width()/2, 0 );
p2 = TQPoint( p1.x(), r.height() );
}
if ( cstyle == Plain ) {
TQPen oldPen = p->pen();
p->setPen( TQPen(g.foreground(),lwidth) );
p->drawLine( p1, p2 );
p->setPen( oldPen );
}
else
qDrawShadeLine( p, p1, p2, g, cstyle == Sunken,
lwidth, midLineWidth() );
break;
}
#endif // TQT_NO_DRAWUTIL
}
/*!
Virtual function that draws the contents of the frame.
The TQPainter is already open when you get it, and you must leave
it open. Painter \link TQPainter::setWorldMatrix()
transformations\endlink are switched off on entry. If you
transform the painter, remember to take the frame into account and
\link TQPainter::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(), TQPainter::setClipRect()
*/
void TQFrame::drawContents( TQPainter * )
{
}
/*!
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 TQFrame::frameChanged()
{
update();
updateGeometry();
}
/*!\reimp
*/
void TQFrame::styleChange( TQStyle& old )
{
updateFrameWidth( TRUE );
TQWidget::styleChange( old );
}
#endif //TQT_NO_FRAME
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