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Add support to Mousemark for drawing arrows.

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svn path=/trunk/KDE/kdebase/workspace/; revision=758640
This commit is contained in:
Luboš Luňák 2008-01-08 16:21:04 +00:00
parent a6fbe3d13e
commit 0b2f726634
2 changed files with 34 additions and 0 deletions
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32
effects/mousemark.cpp
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@ -41,6 +41,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
namespace KWin
{
#define NULL_POINT (QPoint( -1, -1 )) // null point is (0,0), which is valid :-/
KWIN_EFFECT( mousemark, MouseMarkEffect )
MouseMarkEffect::MouseMarkEffect()
@ -54,6 +56,8 @@ MouseMarkEffect::MouseMarkEffect()
KConfigGroup conf = EffectsHandler::effectConfig("MouseMark");
width = conf.readEntry( "LineWidth", 3 );
color = conf.readEntry( "Color", QColor( Qt::red ));
arrow_start = NULL_POINT;
}
void MouseMarkEffect::paintScreen( int mask, QRegion region, ScreenPaintData& data )
@ -86,6 +90,20 @@ void MouseMarkEffect::mouseChanged( const QPoint& pos, const QPoint&,
Qt::MouseButtons, Qt::MouseButtons,
Qt::KeyboardModifiers modifiers, Qt::KeyboardModifiers )
{
if( modifiers == ( Qt::META | Qt::SHIFT | Qt::CTRL )) // start/finish arrow
{
if( arrow_start != NULL_POINT )
{
marks.append( createArrow( arrow_start, pos ));
arrow_start = NULL_POINT;
effects->addRepaintFull();
return;
}
else
arrow_start = pos;
}
if( arrow_start != NULL_POINT )
return;
if( modifiers == ( Qt::META | Qt::SHIFT )) // activated
{
if( drawing.isEmpty())
@ -113,6 +131,20 @@ void MouseMarkEffect::clear()
effects->addRepaintFull();
}
MouseMarkEffect::Mark MouseMarkEffect::createArrow( QPoint arrow_start, QPoint arrow_end )
{
Mark ret;
double angle = atan2( arrow_end.y() - arrow_start.y(), arrow_end.x() - arrow_start.x());
ret += arrow_start + QPoint( 50 * cos( angle + M_PI / 6 ),
50 * sin( angle + M_PI / 6 )); // right one
ret += arrow_start;
ret += arrow_end;
ret += arrow_start; // it's connected lines, so go back with the middle one
ret += arrow_start + QPoint( 50 * cos( angle - M_PI / 6 ),
50 * sin( angle - M_PI / 6 )); // left one
return ret;
}
} // namespace
#include "mousemark.moc"

2
effects/mousemark.h
View file

@ -41,8 +41,10 @@ class MouseMarkEffect
void clear();
private:
typedef QVector< QPoint > Mark;
static Mark createArrow( QPoint arrow_start, QPoint arrow_end );
QVector< Mark > marks;
Mark drawing;
QPoint arrow_start;
int width;
QColor color;
};