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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
// Qt-Security score:significant reason:default
#include "qframe.h"
#include "qbitmap.h"
#include "qdrawutil.h"
#include "qevent.h"
#include "qpainter.h"
#include "qstyle.h"
#include "qstyleoption.h"
#include "qstylepainter.h"
#include "qapplication.h"
#include "qframe_p.h"
QT_BEGIN_NAMESPACE
QFramePrivate::QFramePrivate()
: frect(0, 0, 0, 0),
frameStyle(QFrame::NoFrame | QFrame::Plain),
lineWidth(1),
midLineWidth(0),
frameWidth(0),
leftFrameWidth(0), rightFrameWidth(0),
topFrameWidth(0), bottomFrameWidth(0)
{
}
QFramePrivate::~QFramePrivate()
{
}
inline void QFramePrivate::init()
{
Q_Q(QFrame);
setLayoutItemMargins(QStyle::SE_FrameLayoutItem);
// The frameRect property is implemented in terms of the widget's
// contentsRect, which conflicts with the implicit inclusion of
// the safe area margins in the contentsRect.
q->setAttribute(Qt::WA_ContentsMarginsRespectsSafeArea, false);
}
/*!
\class QFrame
\brief The QFrame class is the base class of widgets that can have a frame.
\ingroup abstractwidgets
\inmodule QtWidgets
QMenu uses this to "raise" the menu above the surrounding
screen. QProgressBar has a "sunken" look. QLabel has a flat look.
The frames of widgets like these can be changed.
\snippet code/src_gui_widgets_qframe.cpp 0
The QFrame class can also be used directly for creating simple
placeholder frames without any contents.
The frame style is specified by a \l{QFrame::Shape}{frame shape} and
a \l{QFrame::Shadow}{shadow style} that is used to visually separate
the frame from surrounding widgets. These properties can be set
together using the setFrameStyle() function and read with frameStyle().
The frame shapes are \l NoFrame, \l Box, \l Panel, \l StyledPanel,
HLine and \l VLine; the shadow styles are \l Plain, \l Raised and
\l Sunken.
A frame widget has three attributes that describe the thickness of the
border: \l lineWidth, \l midLineWidth, and \l frameWidth.
\list
\li The line width is the width of the frame border. It can be modified
to customize the frame's appearance.
\li 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 \l Box, \l
HLine and \l VLine frames that are raised or sunken.
\li The frame width is determined by the frame style, and the frameWidth()
function is used to obtain the value defined for the style used.
\endlist
The margin between the frame and the contents of the frame can be
customized with the QWidget::setContentsMargins() function.
\target picture
This table shows some of the combinations of styles and line widths:
\image frames.png Table of frame styles
*/
/*!
\enum QFrame::Shape
This enum type defines the shapes of frame available.
\value NoFrame QFrame draws nothing
\value Box QFrame draws a box around its contents
\value Panel QFrame 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 QFrame draws a horizontal line that frames nothing
(useful as separator)
\value VLine QFrame draws a vertical line that frames nothing
(useful as separator)
\value WinPanel draws a rectangular panel that can be raised or
sunken like those in Windows 2000. Specifying this shape sets
the line width to 2 pixels. WinPanel is provided for compatibility.
For GUI style independence we recommend using StyledPanel instead.
When it does not call QStyle, Shape interacts with QFrame::Shadow,
the lineWidth() and the midLineWidth() to create the total result.
See the picture of the frames in the main class documentation.
\sa QFrame::Shadow, QFrame::style(), QStyle::drawPrimitive()
*/
/*!
\enum QFrame::Shadow
This enum type defines the types of shadow that are used to give
a 3D effect to frames.
\value Plain the frame and contents appear level with the
surroundings; draws using the palette QPalette::WindowText 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
Shadow interacts with QFrame::Shape, the lineWidth() and the
midLineWidth(). See the picture of the frames in the main class
documentation.
\sa QFrame::Shape, lineWidth(), midLineWidth()
*/
/*!
\enum QFrame::StyleMask
This enum defines two constants that can be used to extract the
two components of frameStyle():
\value Shadow_Mask The \l Shadow part of frameStyle()
\value Shape_Mask The \l Shape part of frameStyle()
Normally, you don't need to use these, since frameShadow() and
frameShape() already extract the \l Shadow and the \l Shape parts
of frameStyle().
\sa frameStyle(), setFrameStyle()
*/
/*!
Constructs a frame widget with frame style \l NoFrame and a
1-pixel frame width.
The \a parent and \a f arguments are passed to the QWidget
constructor.
*/
QFrame::QFrame(QWidget* parent, Qt::WindowFlags f)
: QWidget(*new QFramePrivate, parent, f)
{
Q_D(QFrame);
d->init();
}
/*! \internal */
QFrame::QFrame(QFramePrivate &dd, QWidget* parent, Qt::WindowFlags f)
: QWidget(dd, parent, f)
{
Q_D(QFrame);
d->init();
}
/*!
\since 5.5
Initializes \a option with the values from this QFrame. This method is
useful for subclasses when they need a QStyleOptionFrame but don't want to
fill in all the information themselves.
\sa QStyleOption::initFrom()
*/
void QFrame::initStyleOption(QStyleOptionFrame *option) const
{
if (!option)
return;
Q_D(const QFrame);
option->initFrom(this);
int frameShape = d->frameStyle & QFrame::Shape_Mask;
int frameShadow = d->frameStyle & QFrame::Shadow_Mask;
option->frameShape = Shape(int(option->frameShape) | frameShape);
option->rect = frameRect();
switch (frameShape) {
case QFrame::Box:
case QFrame::HLine:
case QFrame::VLine:
case QFrame::StyledPanel:
case QFrame::Panel:
option->lineWidth = d->lineWidth;
option->midLineWidth = d->midLineWidth;
break;
default:
// most frame styles do not handle customized line and midline widths
// (see updateFrameWidth()).
option->lineWidth = d->frameWidth;
break;
}
if (frameShadow == Sunken)
option->state |= QStyle::State_Sunken;
else if (frameShadow == Raised)
option->state |= QStyle::State_Raised;
}
/*!
Destroys the frame.
*/
QFrame::~QFrame()
{
}
/*!
Returns the frame style.
The default value is QFrame::Plain.
\sa setFrameStyle(), frameShape(), frameShadow()
*/
int QFrame::frameStyle() const
{
Q_D(const QFrame);
return d->frameStyle;
}
/*!
\property QFrame::frameShape
\brief the frame shape value from the frame style
\sa frameStyle(), frameShadow()
*/
QFrame::Shape QFrame::frameShape() const
{
Q_D(const QFrame);
return (Shape) (d->frameStyle & Shape_Mask);
}
void QFrame::setFrameShape(QFrame::Shape s)
{
Q_D(QFrame);
setFrameStyle((d->frameStyle & Shadow_Mask) | s);
}
/*!
\property QFrame::frameShadow
\brief the frame shadow value from the frame style
\sa frameStyle(), frameShape()
*/
QFrame::Shadow QFrame::frameShadow() const
{
Q_D(const QFrame);
return (Shadow) (d->frameStyle & Shadow_Mask);
}
void QFrame::setFrameShadow(QFrame::Shadow s)
{
Q_D(QFrame);
setFrameStyle((d->frameStyle & Shape_Mask) | s);
}
/*!
Sets the frame style to \a style.
The \a style is the bitwise OR between a frame shape and a frame
shadow style. See the picture of the frames in the main class
documentation.
The frame shapes are given in \l{QFrame::Shape} and the shadow
styles in \l{QFrame::Shadow}.
If a mid-line width greater than 0 is specified, an additional
line is drawn for \l Raised or \l Sunken \l Box, \l HLine, and \l
VLine frames. The mid-color of the current color group is used for
drawing middle lines.
\sa frameStyle()
*/
void QFrame::setFrameStyle(int style)
{
Q_D(QFrame);
if (!testAttribute(Qt::WA_WState_OwnSizePolicy)) {
QSizePolicy sp;
switch (style & Shape_Mask) {
case HLine:
sp = QSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed, QSizePolicy::Line);
break;
case VLine:
sp = QSizePolicy(QSizePolicy::Fixed, QSizePolicy::Minimum, QSizePolicy::Line);
break;
default:
sp = QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred, QSizePolicy::Frame);
}
setSizePolicy(sp);
setAttribute(Qt::WA_WState_OwnSizePolicy, false);
}
d->frameStyle = (short)style;
update();
d->updateFrameWidth();
}
/*!
\property QFrame::lineWidth
\brief the line width
Note that the \e total line width for frames used as separators
(\l HLine and \l VLine) is specified by \l frameWidth.
The default value is 1.
\sa midLineWidth, frameWidth
*/
void QFrame::setLineWidth(int w)
{
Q_D(QFrame);
if (short(w) == d->lineWidth)
return;
d->lineWidth = short(w);
d->updateFrameWidth();
}
int QFrame::lineWidth() const
{
Q_D(const QFrame);
return d->lineWidth;
}
/*!
\property QFrame::midLineWidth
\brief the width of the mid-line
The default value is 0.
\sa lineWidth, frameWidth
*/
void QFrame::setMidLineWidth(int w)
{
Q_D(QFrame);
if (short(w) == d->midLineWidth)
return;
d->midLineWidth = short(w);
d->updateFrameWidth();
}
int QFrame::midLineWidth() const
{
Q_D(const QFrame);
return d->midLineWidth;
}
/*!
\internal
Updates the frame widths from the style.
*/
void QFramePrivate::updateStyledFrameWidths()
{
Q_Q(const QFrame);
QStyleOptionFrame opt;
q->initStyleOption(&opt);
QRect cr = q->style()->subElementRect(QStyle::SE_ShapedFrameContents, &opt, q);
leftFrameWidth = cr.left() - opt.rect.left();
topFrameWidth = cr.top() - opt.rect.top();
rightFrameWidth = opt.rect.right() - cr.right(),
bottomFrameWidth = opt.rect.bottom() - cr.bottom();
frameWidth = qMax(qMax(leftFrameWidth, rightFrameWidth),
qMax(topFrameWidth, bottomFrameWidth));
}
/*!
\internal
Updated the frameWidth parameter.
*/
void QFramePrivate::updateFrameWidth()
{
Q_Q(QFrame);
QRect fr = q->frameRect();
updateStyledFrameWidths();
q->setFrameRect(fr);
setLayoutItemMargins(QStyle::SE_FrameLayoutItem);
}
/*!
\property QFrame::frameWidth
\brief the width of the frame that is drawn.
Note that the frame width depends on the \l{QFrame::setFrameStyle()}{frame style},
not only the line width and the mid-line width. For example, the style specified
by \l NoFrame always has a frame width of 0, whereas the style \l Panel has a
frame width equivalent to the line width.
\sa lineWidth(), midLineWidth(), frameStyle()
*/
int QFrame::frameWidth() const
{
Q_D(const QFrame);
return d->frameWidth;
}
/*!
\property QFrame::frameRect
\brief the frame's rectangle
The frame's rectangle is the rectangle the frame is drawn in. By
default, this is the entire widget. Setting the rectangle \e doesn't
cause a widget update. The frame rectangle is automatically adjusted
when the widget changes size.
If you set the rectangle to a null rectangle (for example,
QRect(0, 0, 0, 0)), then the resulting frame rectangle is
equivalent to the \l{QWidget::rect()}{widget rectangle}.
*/
QRect QFrame::frameRect() const
{
Q_D(const QFrame);
QRect fr = contentsRect();
fr.adjust(-d->leftFrameWidth, -d->topFrameWidth, d->rightFrameWidth, d->bottomFrameWidth);
return fr;
}
void QFrame::setFrameRect(const QRect &r)
{
Q_D(QFrame);
QRect cr = r.isValid() ? r : rect();
cr.adjust(d->leftFrameWidth, d->topFrameWidth, -d->rightFrameWidth, -d->bottomFrameWidth);
setContentsMargins(cr.left(), cr.top(), rect().right() - cr.right(), rect().bottom() - cr.bottom());
}
/*!\reimp
*/
QSize QFrame::sizeHint() const
{
Q_D(const QFrame);
// Returns a size hint for the frame - for HLine and VLine
// shapes, this is stretchable one way and 3 pixels wide the
// other. For other shapes, QWidget::sizeHint() is used.
switch (d->frameStyle & Shape_Mask) {
case HLine:
return QSize(-1,3);
case VLine:
return QSize(3,-1);
default:
return QWidget::sizeHint();
}
}
/*!\reimp
*/
void QFrame::paintEvent(QPaintEvent *)
{
QStylePainter p(this);
drawFrame(&p);
}
/*!
\internal
Used by QLabel and QLCDNumber
*/
void QFrame::drawFrame(QPainter *p)
{
QStyleOptionFrame opt;
initStyleOption(&opt);
style()->drawControl(QStyle::CE_ShapedFrame, &opt, p, this);
}
/*!\reimp
*/
void QFrame::changeEvent(QEvent *ev)
{
Q_D(QFrame);
if (ev->type() == QEvent::StyleChange
#ifdef Q_OS_MACOS
|| ev->type() == QEvent::MacSizeChange
#endif
)
d->updateFrameWidth();
QWidget::changeEvent(ev);
}
/*! \reimp */
bool QFrame::event(QEvent *e)
{
if (e->type() == QEvent::ParentChange)
d_func()->updateFrameWidth();
bool result = QWidget::event(e);
//this has to be done after the widget has been polished
if (e->type() == QEvent::Polish)
d_func()->updateFrameWidth();
return result;
}
QT_END_NAMESPACE
#include "moc_qframe.cpp"