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Allow pasting into the selection only

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Kovid Goyal 2013-12-05 09:13:23 +05:30
parent 50b621397e
commit 830198d7b0
1 changed files with 22 additions and 5 deletions
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27
src/calibre/gui2/tweak_book/editor/canvas.py
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@ -68,8 +68,18 @@ class Command(QUndoCommand):
canvas = self.canvas_ref() canvas = self.canvas_ref()
canvas.set_image(self.after_image) canvas.set_image(self.after_image)
def get_selection_rect(img, sr, target):
' Given selection rect return the corresponding rectangle in the underlying image as left, top, width, height '
left_border = (abs(sr.left() - target.left())/target.width()) * img.width()
top_border = (abs(sr.top() - target.top())/target.height()) * img.height()
right_border = (abs(target.right() - sr.right())/target.width()) * img.width()
bottom_border = (abs(target.bottom() - sr.bottom())/target.height()) * img.height()
return left_border, top_border, img.width() - left_border - right_border, img.height() - top_border - bottom_border
class Trim(Command): class Trim(Command):
''' Remove the areas of the image outside the current selection. '''
def __init__(self, canvas): def __init__(self, canvas):
Command.__init__(self, _('Trim image'), canvas) Command.__init__(self, _('Trim image'), canvas)
@ -77,19 +87,26 @@ class Trim(Command):
img = canvas.current_image img = canvas.current_image
target = canvas.target target = canvas.target
sr = canvas.selection_state.rect sr = canvas.selection_state.rect
left_border = (abs(sr.left() - target.left())/target.width()) * img.width() return img.copy(*get_selection_rect(img, sr, target))
top_border = (abs(sr.top() - target.top())/target.height()) * img.height()
right_border = (abs(target.right() - sr.right())/target.width()) * img.width()
bottom_border = (abs(target.bottom() - sr.bottom())/target.height()) * img.height()
return img.copy(left_border, top_border, img.width() - left_border - right_border, img.height() - top_border - bottom_border)
class Replace(Command): class Replace(Command):
''' Replace the current image with another image. If there is a selection,
only the region of the selection is replaced. '''
def __init__(self, img, text, canvas): def __init__(self, img, text, canvas):
self.after_image = img self.after_image = img
Command.__init__(self, text, canvas) Command.__init__(self, text, canvas)
def __call__(self, canvas): def __call__(self, canvas):
if canvas.has_selection and canvas.selection_state.rect is not None:
pimg = self.after_image
img = self.after_image = QImage(canvas.current_image)
rect = QRectF(*get_selection_rect(img, canvas.selection_state.rect, canvas.target))
p = QPainter(img)
p.setRenderHint(p.SmoothPixmapTransform, True)
p.drawImage(rect, pimg, QRectF(pimg.rect()))
p.end()
return self.after_image return self.after_image
def imageop(func): def imageop(func):