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Implemented object resizing in view.

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This commit is contained in:
Jim Evins
2015-08-15 01:43:06 -04:00
parent ef1cadad0c
commit ec60767184
6 changed files with 262 additions and 76 deletions
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glabels/View.cpp
+164 -10
View File
@@ -282,6 +282,10 @@ glabels::View::paintEvent( QPaintEvent* event )
{
QPainter painter( this );
painter.setRenderHint( QPainter::Antialiasing, true );
painter.setRenderHint( QPainter::TextAntialiasing, true );
painter.setRenderHint( QPainter::SmoothPixmapTransform, true );
painter.scale( mZoom, mZoom );
drawBgLayer( &painter );
@@ -327,9 +331,11 @@ glabels::View::mouseMoveEvent( QMouseEvent* event )
transform.scale( mZoom, mZoom );
qreal xWorld, yWorld;
transform.inverted().map( event->x(), event->y(), &xWorld, &yWorld );
QPointF pWorld = transform.inverted().map( event->posF() );
double xWorld = pWorld.x();
double yWorld = pWorld.y();
/*
* Emit signal regardless of mode
*/
@@ -375,7 +381,8 @@ glabels::View::mouseMoveEvent( QMouseEvent* event )
break;
case ArrowResize:
/* @TODO handle resize motion */
handleResizeMotion( xWorld, yWorld );
update();
break;
default:
@@ -435,10 +442,11 @@ glabels::View::mousePressEvent( QMouseEvent* event )
transform.scale( mZoom, mZoom );
qreal xWorld, yWorld;
transform.inverted().map( event->x(), event->y(), &xWorld, &yWorld );
QPointF pWorld = transform.inverted().map( event->posF() );
double xWorld = pWorld.x();
double yWorld = pWorld.y();
if ( event->button() & Qt::LeftButton )
{
//
@@ -452,7 +460,14 @@ glabels::View::mousePressEvent( QMouseEvent* event )
if ( mModel->isSelectionAtomic() &&
(handle = mModel->handleAt( mZoom, xWorld, yWorld )) != 0 )
{
// TODO PREP RESIZE
//
// Start an object resize
//
mResizeObject = handle->owner();
mResizeHandle = handle;
mResizeHonorAspect = event->modifiers() & Qt::ControlModifier;
mState = ArrowResize;
}
else if ( (object = mModel->objectAt( mZoom, xWorld, yWorld )) != 0 )
{
@@ -536,10 +551,11 @@ glabels::View::mouseReleaseEvent( QMouseEvent* event )
transform.scale( mZoom, mZoom );
qreal xWorld, yWorld;
transform.inverted().map( event->x(), event->y(), &xWorld, &yWorld );
QPointF pWorld = transform.inverted().map( event->posF() );
double xWorld = pWorld.x();
double yWorld = pWorld.y();
if ( event->button() & Qt::LeftButton )
{
//
@@ -552,6 +568,10 @@ glabels::View::mouseReleaseEvent( QMouseEvent* event )
switch (mState)
{
case ArrowResize:
mState = IdleState;
break;
case ArrowSelectRegion:
mSelectRegionVisible = false;
mSelectRegion.setX2( xWorld );
@@ -593,6 +613,140 @@ glabels::View::leaveEvent( QEvent* event )
}
///
/// Handle resize motion
///
void
glabels::View::handleResizeMotion( double xWorld, double yWorld )
{
QPointF p( xWorld, yWorld );
Handle::Location location = mResizeHandle->location();
/*
* Change to item relative coordinates
*/
p -= QPointF( mResizeObject->x0(), mResizeObject->y0() );
p = mResizeObject->matrix().map( p );
/*
* Initialize origin and 2 corners in object relative coordinates.
*/
double x0 = 0.0;
double y0 = 0.0;
double x1 = 0.0;
double y1 = 0.0;
double x2 = mResizeObject->w();
double y2 = mResizeObject->h();
/*
* Calculate new size
*/
double w, h;
switch ( location )
{
case Handle::NW:
w = std::max( x2 - p.x(), 0.0 );
h = std::max( y2 - p.y(), 0.0 );
break;
case Handle::N:
w = x2 - x1;
h = std::max( y2 - p.y(), 0.0 );
break;
case Handle::NE:
w = std::max( p.x() - x1, 0.0 );
h = std::max( y2 - p.y(), 0.0 );
break;
case Handle::E:
w = std::max( p.x() - x1, 0.0 );
h = y2 - y1;
break;
case Handle::SE:
w = std::max( p.x() - x1, 0.0 );
h = std::max( p.y() - y1, 0.0 );
break;
case Handle::S:
w = x2 - x1;
h = std::max( p.y() - y1, 0.0 );
break;
case Handle::SW:
w = std::max( x2 - p.x(), 0.0 );
h = std::max( p.y() - y1, 0.0 );
break;
case Handle::W:
w = std::max( x2 - p.x(), 0.0 );
h = y2 - y1;
break;
case Handle::P1:
x1 = p.x();
y1 = p.y();
w = x2 - p.x();
h = y2 - p.y();
x0 = x0 + x1;
y0 = y0 + y1;
break;
case Handle::P2:
w = p.x() - x1;
h = p.y() - y1;
x0 = x0 + x1;
y0 = y0 + y1;
break;
default:
Q_ASSERT_X( false, "View::handleResizeMotion", "Invalid Handle Location" );
}
/*
* Set size
*/
if ( !(location == Handle::P1) && !(location == Handle::P2) )
{
if ( mResizeHonorAspect )
{
mResizeObject->setSizeHonorAspect( w, h );
}
else
{
mResizeObject->setSize( w, h );
}
/*
* Adjust origin, if needed.
*/
switch ( location )
{
case Handle::NW:
x0 += x2 - mResizeObject->w();
y0 += y2 - mResizeObject->h();
break;
case Handle::N:
case Handle::NE:
y0 += y2 - mResizeObject->h();
break;
case Handle::W:
case Handle::SW:
x0 += x2 - mResizeObject->w();
break;
defaule:
break;
}
}
else
{
mResizeObject->setSize( w, h );
}
/*
* Put new origin back into world coordinates and set.
*/
QTransform inverseMatrix = mResizeObject->matrix().inverted();
QPointF p0( x0, y0 );
p0 = inverseMatrix.map( p0 );
p0 += QPointF( mResizeObject->x0(), mResizeObject->y0() );
mResizeObject->setPosition( p0.x(), p0.y() );
}
///
/// Draw Background Layer
///