You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
3.2 KiB
89 lines
3.2 KiB
#!/usr/bin/env python3 |
|
|
|
# MIT License |
|
# |
|
# Copyright (c) 2021 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: |
|
# |
|
# The above copyright notice and this permission notice shall be included in all |
|
# copies or substantial portions of the Software. |
|
# |
|
# 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 |
|
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
|
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
|
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
|
# SOFTWARE. |
|
|
|
from TermTk.TTkCore.constant import TTkConstant, TTkK |
|
from TermTk.TTkCore.cfg import * |
|
from TermTk.TTkCore.log import TTkLog |
|
from TermTk.TTkCore.signal import pyTTkSlot, pyTTkSignal |
|
from TermTk.TTkWidgets.widget import TTkWidget |
|
|
|
class TTkAbstractScrollView(TTkWidget): |
|
__slots__ = ( |
|
'_viewOffsetX', '_viewOffsetY', |
|
# Signals |
|
'viewMovedTo', 'viewSizeChanged', 'viewChanged') |
|
|
|
def __init__(self, *args, **kwargs): |
|
# Signals |
|
self.viewMovedTo = pyTTkSignal(int, int) # x, y |
|
self.viewSizeChanged = pyTTkSignal(int, int) # w, h |
|
self.viewChanged = pyTTkSignal() |
|
super().__init__(self, *args, **kwargs) |
|
self._name = kwargs.get('name' , 'TTkAbstractScrollView') |
|
|
|
self._viewOffsetX = 0 |
|
self._viewOffsetY = 0 |
|
|
|
# Override this function |
|
def viewFullAreaSize(self) -> (int, int): |
|
raise NotImplementedError() |
|
|
|
# Override this function |
|
def viewDisplayedSize(self) -> (int, int): |
|
raise NotImplementedError() |
|
|
|
@pyTTkSlot(int, int) |
|
def viewMoveTo(self, x, y): |
|
fw, fh = self.viewFullAreaSize() |
|
dw, dh = self.viewDisplayedSize() |
|
rangex = fw - dw |
|
rangey = fh - dh |
|
# TTkLog.debug(f"x:{x},y:{y}, full:{fw,fh}, display:{dw,dh}, range:{rangex,rangey}") |
|
x = max(0,min(rangex,x)) |
|
y = max(0,min(rangey,y)) |
|
# TTkLog.debug(f"x:{x},y:{y}, wo:{self._viewOffsetX,self._viewOffsetY}") |
|
if self._viewOffsetX == x and \ |
|
self._viewOffsetY == y: # Nothong to do |
|
return |
|
self._viewOffsetX = x |
|
self._viewOffsetY = y |
|
self.viewMovedTo.emit(x,y) |
|
self.viewChanged.emit() |
|
self.update() |
|
|
|
def wheelEvent(self, evt): |
|
delta = TTkCfg.scrollDelta |
|
offx, offy = self.getViewOffsets() |
|
if evt.evt == TTkK.WHEEL_Up: |
|
delta = -delta |
|
self.viewMoveTo(offx, offy + delta) |
|
return True |
|
|
|
def resizeEvent(self, w, h): |
|
self.viewSizeChanged.emit(w,h) |
|
self.viewChanged.emit() |
|
|
|
def getViewOffsets(self): |
|
return self._viewOffsetX, self._viewOffsetY |
|
|
|
|