def mousePressEvent(self, event):
#print "FixedRatioRectItem_cutom::mousePressEvent"
if event.button() & Qt.RightButton != 0:
w=self._rect.width()
h=self._rect.height()
centre_x=self._rect.center().x()
centre_y=self._rect.center().y()
ratio=self._rect.width()/self._rect.height()
self._resize = True
self._resize_start = event.scenePos()
self._resize_start_rect = QRectF(self._rect)
self._upper_half_clicked = (event.scenePos().y() < self._resize_start_rect.center().y())
self._left_half_clicked = (event.scenePos().x() < self._resize_start_rect.center().x())
event.accept()
#new_w=self._resize_start_rect.width()
#new_h=new_w/ratio
#x = centre_x - new_w/2
#y = centre_y - new_h/2
#rect = QRectF(QPointF(x,y), QSizeF(new_w, new_h)).normalized()
#self._updateRect(rect)
#self.updateModel()
#event.accept()
else:
BaseItem.mousePressEvent(self, event)
def mouseMoveEvent(self, event):
#print "FixedRatioRectItem_cutom::mouseMoveEvent"
if self._resize:
diff = event.scenePos() - self._resize_start
ratio=self._rect.width()/self._rect.height()
centre_x=self._rect.center().x()
centre_y=self._rect.center().y()
changed=False
if self._left_half_clicked:
new_w = self._resize_start_rect.width() - diff.x()
if (new_w>10):
w = new_w
h = w/ratio
changed=True
else:
new_w = self._resize_start_rect.width() + diff.x()
if (new_w>10):
w = new_w
h = w/ratio
changed=True
if self._upper_half_clicked:
new_h=self._resize_start_rect.height() - diff.y()
if (new_h>10):
h = new_h
w = ratio*h
changed=True
else:
new_h=self._resize_start_rect.height() + diff.y()
if (new_h>10):
h = new_h
w = ratio*h
changed=True
if (changed):
x = centre_x - w/2
y = centre_y - h/2
if (x+w<=self._max_w and y+h<=self._max_h and x>=0 and y>=0):
rect = QRectF(QPointF(x,y), QSizeF(w, h)).normalized()
self._updateRect(rect)
self.updateModel()
event.accept()
else:
currentRect=self._rect
BaseItem.mouseMoveEvent(self, event)
accepted=True
if (self._rect.x()<0 or self._rect.y()<0):
accepted=False
elif (self._rect.x()+self._rect.width()>self._max_w or self._rect.y()+self._rect.height()>self._max_h):
accepted=False
if not(accepted):
self._updateRect(currentRect)
self.updateModel()
event.accept()
def __init__(self, model_item=None, prefix="", parent=None, color=Qt.black, label="", radius=5):
BaseItem.__init__(self, model_item, prefix, parent)
self._point = None
self._radius=radius
self._userColor=color
self._userLabel=label
self.setColor(self._userColor)
self.setRadius(self._radius)
self._text_item.setHtml(self._userLabel)
self.updatePoint()
def keyPressEvent(self, event):
BaseItem.keyPressEvent(self, event)
step = 1
if event.modifiers() & Qt.ShiftModifier:
step = 5
ds = {Qt.Key_Left: (-step, 0),
Qt.Key_Right: (step, 0),
Qt.Key_Up: (0, -step),
Qt.Key_Down: (0, step)
}.get(event.key(), None)
if ds is not None:
self.moveBy(*ds)
event.accept()
def paint(self, painter, option, widget=None):
BaseItem.paint(self, painter, option, widget)
pen = self.pen()
if self.isSelected():
pen.setStyle(Qt.DashLine)
painter.setPen(pen)
# bb=self.boundingRect()
# painter.drawEllipse(bb)
# painter.drawRect(bb)
r = self._radius
r_4=r/4
r_2=2*r_4
hr=QRectF(-r, -r_4, 2 * r, r_2)
vr=QRectF(-r_4, -r, r_2, 2 * r)
# print r,hr,vr
painter.drawRect(hr)
painter.drawRect(vr)
def keyPressEvent(self, event):
BaseItem.keyPressEvent(self, event)
step = 1
if event.modifiers() & Qt.ShiftModifier:
step = 5
ds = {Qt.Key_Left: (-step, 0),
Qt.Key_Right: (step, 0),
Qt.Key_Up: (0, -step),
Qt.Key_Down: (0, step),
}.get(event.key(), None)
if ds is not None:
if event.modifiers() & Qt.ControlModifier:
centre_x=self._rect.center().x()#self._rect.x()+self._rect.width()/2
centre_y=self._rect.center().y()#self._rect.y()+self._rect.height()/2
ratio=self._rect.width()/self._rect.height()
changed=False
if (ds[0]==0): # change of height
newh=self._rect.height() + ds[1]*-2
if (newh>10):
h = newh
w = ratio*h
changed=True
else: # change of width
neww=self._rect.width() + ds[0]*2
if (neww>10):
w = neww
h = w/ratio
changed=True
if (changed):
x = centre_x - w/2
y = centre_y - h/2
if (x>=0 and y>=0 and x+w<=self._max_w and y+h<=self._max_h):
rect = QRectF(QPointF(x,y), QSizeF(w, h)).normalized()
self._updateRect(rect)
else:
rect = self._rect.adjusted(*(ds + ds))
if (rect.x()>=0 and rect.y()>=0 and rect.x()+rect.width()<=self._max_w and rect.y()+rect.height()<=self._max_h):
self._updateRect(rect)
self.updateModel()
event.accept()