Source code for TermTk.TTkGui.drag

# MIT License
#
# Copyright (c) 2022 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in all
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

__all__ = ['TTkDrag', 'TTkDropEvent']

from TermTk.TTkCore.helper    import TTkHelper
from TermTk.TTkCore.canvas    import TTkCanvas
from TermTk.TTkWidgets.widget import TTkWidget

class _TTkDragDisplayWidget(TTkWidget):
    __slots__ = ('_pixmap')

    def setPixmap(self, pixmap, hotSpot):
        self.getCanvas().setTransparent(True)
        w,h = pixmap.size()
        hsx, hsy= hotSpot
        x, y = TTkHelper.mousePos()
        self._pixmap = pixmap
        self.setGeometry(x-hsx,y-hsy,w,h)

    def paintEvent(self, canvas):
        _,_,w,h = self.geometry()
        canvas.paintCanvas(self._pixmap, (0,0,w,h), (0,0,w,h), (0,0,w,h))

[docs] class TTkDrag(): __slots__ = ('_data', '_pixmap', '_showPixmap', '_hotSpot') def __init__(self): self._data = None self._showPixmap = True self._hotSpot = (0,0) self._pixmap = _TTkDragDisplayWidget(size=(5,1)) pixmap = TTkCanvas(width=5, height=1) pixmap.drawText(pos=(0,0), text='[...]') self._pixmap.setPixmap(pixmap, self._hotSpot)
[docs] def setData(self, data): self._data = data
[docs] def data(self): return self._data
[docs] def setHotSpot(self, x,y): self._hotSpot = (x,y)
[docs] def hotSpot(self): return self._hotSpot
[docs] def setPixmap(self, pixmap): if issubclass(type(pixmap),TTkWidget): canvas = pixmap.getCanvas() canvas.updateSize() pixmap.paintEvent(canvas) pixmap = canvas if type(pixmap) is TTkCanvas: pixmap.updateSize() self._pixmap.setPixmap(pixmap, self._hotSpot)
[docs] def pixmap(self): return self._pixmap
[docs] def visible(self): return self._showPixmap
[docs] def showPixmap(self): self._showPixmap = True
[docs] def hidePixmap(self): self._showPixmap = False
[docs] def exec(self): TTkHelper.dndInit(self)
[docs] @staticmethod def copy(drag): ret = TTkDropEvent() ret._data = drag._data ret._pixmap = drag._pixmap ret._hotSpot = drag._hotSpot return ret
[docs] def getDragEnterEvent(self, evt): ret = TTkDropEvent.copy(self) ret._pos = (evt.x, evt.y) ret.x = evt.x ret.y = evt.y return ret
[docs] def getDragLeaveEvent(self, evt): return self.getDragEnterEvent(evt)
[docs] def getDragMoveEvent(self, evt): return self.getDragEnterEvent(evt)
[docs] def getDropEvent(self, evt): return self.getDragEnterEvent(evt)
[docs] class TTkDropEvent(TTkDrag): __slots__ = ('_pos', 'x', 'y')
[docs] def pos(self): return self._pos