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112 lines
4.7 KiB
112 lines
4.7 KiB
#!/usr/bin/env python3 |
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# MIT License |
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# |
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# Copyright (c) 2021 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com> |
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# |
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# Permission is hereby granted, free of charge, to any person obtaining a copy |
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# of this software and associated documentation files (the "Software"), to deal |
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# in the Software without restriction, including without limitation the rights |
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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# copies of the Software, and to permit persons to whom the Software is |
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# furnished to do so, subject to the following conditions: |
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# |
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# The above copyright notice and this permission notice shall be included in all |
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# copies or substantial portions of the Software. |
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# |
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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# SOFTWARE. |
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from TermTk.TTkCore.constant import TTkConstant, TTkK |
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from TermTk.TTkCore.log import TTkLog |
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from TermTk.TTkCore.cfg import * |
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from TermTk.TTkCore.signal import pyTTkSlot, pyTTkSignal |
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from TermTk.TTkWidgets.widget import TTkWidget |
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from TermTk.TTkWidgets.scrollbar import TTkScrollBar |
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from TermTk.TTkLayouts.gridlayout import TTkGridLayout |
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from TermTk.TTkAbstract.abstractscrollview import TTkAbstractScrollView |
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class TTkAbstractScrollArea(TTkWidget): |
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__slots__ = ( |
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'_viewport', |
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'_verticalScrollBar', '_verticalScrollBarPolicy', |
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'_horizontalScrollBar', '_horizontalScrollBarPolicy',) |
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def __init__(self, *args, **kwargs): |
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super().__init__(self, *args, **kwargs) |
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self._name = kwargs.get('name' , 'TTkAbstractScrollArea') |
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self.setLayout(TTkGridLayout()) |
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self._verticalScrollBar = TTkScrollBar(orientation=TTkK.VERTICAL) |
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self._horizontalScrollBar = TTkScrollBar(orientation=TTkK.HORIZONTAL) |
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self._verticalScrollBarPolicy = TTkK.ScrollBarAsNeeded |
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self._horizontalScrollBarPolicy = TTkK.ScrollBarAsNeeded |
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@pyTTkSlot() |
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def _viewportChanged(self): |
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if not self.isVisible(): return |
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fw, fh = self._viewport.viewFullAreaSize() |
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dw, dh = self._viewport.viewDisplayedSize() |
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ox, oy = self._viewport.getViewOffsets() |
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if fw==0 or fh==0 or dw==0 or dh==0: |
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return |
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hpage = dw |
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vpage = dh |
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hrange = fw - dw |
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vrange = fh - dh |
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# TTkLog.debug(f"f:{fw,fh}, d:{dw,dh}, o:{ox,oy}") |
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self._verticalScrollBar.setPageStep(vpage) |
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self._verticalScrollBar.setRange(0, vrange) |
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self._verticalScrollBar.setValue(oy) |
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self._horizontalScrollBar.setPageStep(hpage) |
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self._horizontalScrollBar.setRange(0, hrange) |
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self._horizontalScrollBar.setValue(ox) |
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if self._verticalScrollBarPolicy == TTkK.ScrollBarAsNeeded: |
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if vrange<=0: self._verticalScrollBar.hide() |
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else: self._verticalScrollBar.show() |
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elif self._verticalScrollBarPolicy == TTkK.ScrollBarAlwaysOn: |
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self._verticalScrollBar.show() |
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else: |
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self._verticalScrollBar.show() |
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if self._horizontalScrollBarPolicy == TTkK.ScrollBarAsNeeded: |
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if hrange<=0: self._horizontalScrollBar.hide() |
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else: self._horizontalScrollBar.show() |
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elif self._horizontalScrollBarPolicy == TTkK.ScrollBarAlwaysOn: |
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self._horizontalScrollBar.show() |
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else: |
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self._horizontalScrollBar.show() |
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@pyTTkSlot(int) |
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def _vscrollMoved(self, val): |
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ox, _ = self._viewport.getViewOffsets() |
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self._viewport.viewMoveTo(ox, val) |
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@pyTTkSlot(int) |
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def _hscrollMoved(self, val): |
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_, oy = self._viewport.getViewOffsets() |
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self._viewport.viewMoveTo(val, oy) |
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def setViewport(self, viewport): |
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if not isinstance(viewport, TTkAbstractScrollView): |
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raise TypeError("TTkAbstractScrollView is required in TTkAbstractScrollArea.setVewport(viewport)") |
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self._viewport = viewport |
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self._viewport.viewChanged.connect(self._viewportChanged) |
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self._verticalScrollBar.sliderMoved.connect(self._vscrollMoved) |
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self._horizontalScrollBar.sliderMoved.connect(self._hscrollMoved) |
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self.layout().addWidget(viewport,0,0) |
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self.layout().addWidget(self._verticalScrollBar,0,1) |
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self.layout().addWidget(self._horizontalScrollBar,1,0) |
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def setVerticalScrollBarPolicy(self, policy): |
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self._verticalScrollBarPolicy = policy |
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def setHorizontalScrollBarPolicy(self, policy): |
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self._horizontalScrollBarPolicy = policy |
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