132 lines
4.2 KiB
Python
132 lines
4.2 KiB
Python
# -*- coding: utf-8 -*-
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from ..Qt import QtCore, QtGui
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class DockDrop(object):
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"""Provides dock-dropping methods"""
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def __init__(self, allowedAreas=None):
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object.__init__(self)
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if allowedAreas is None:
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allowedAreas = ['center', 'right', 'left', 'top', 'bottom']
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self.allowedAreas = set(allowedAreas)
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self.setAcceptDrops(True)
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self.dropArea = None
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self.overlay = DropAreaOverlay(self)
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self.overlay.raise_()
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def resizeOverlay(self, size):
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self.overlay.resize(size)
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def raiseOverlay(self):
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self.overlay.raise_()
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def dragEnterEvent(self, ev):
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src = ev.source()
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if hasattr(src, 'implements') and src.implements('dock'):
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#print "drag enter accept"
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ev.accept()
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else:
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#print "drag enter ignore"
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ev.ignore()
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def dragMoveEvent(self, ev):
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#print "drag move"
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# QDragMoveEvent inherits QDropEvent which provides posF()
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# PyQt6 provides only position()
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posF = ev.posF() if hasattr(ev, 'posF') else ev.position()
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ld = posF.x()
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rd = self.width() - ld
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td = posF.y()
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bd = self.height() - td
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mn = min(ld, rd, td, bd)
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if mn > 30:
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self.dropArea = "center"
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elif (ld == mn or td == mn) and mn > self.height()/3.:
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self.dropArea = "center"
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elif (rd == mn or ld == mn) and mn > self.width()/3.:
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self.dropArea = "center"
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elif rd == mn:
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self.dropArea = "right"
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elif ld == mn:
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self.dropArea = "left"
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elif td == mn:
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self.dropArea = "top"
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elif bd == mn:
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self.dropArea = "bottom"
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if ev.source() is self and self.dropArea == 'center':
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#print " no self-center"
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self.dropArea = None
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ev.ignore()
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elif self.dropArea not in self.allowedAreas:
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#print " not allowed"
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self.dropArea = None
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ev.ignore()
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else:
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#print " ok"
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ev.accept()
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self.overlay.setDropArea(self.dropArea)
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def dragLeaveEvent(self, ev):
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self.dropArea = None
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self.overlay.setDropArea(self.dropArea)
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def dropEvent(self, ev):
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area = self.dropArea
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if area is None:
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return
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if area == 'center':
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area = 'above'
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self.area.moveDock(ev.source(), area, self)
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self.dropArea = None
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self.overlay.setDropArea(self.dropArea)
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class DropAreaOverlay(QtGui.QWidget):
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"""Overlay widget that draws drop areas during a drag-drop operation"""
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def __init__(self, parent):
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QtGui.QWidget.__init__(self, parent)
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self.dropArea = None
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self.hide()
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self.setAttribute(QtCore.Qt.WidgetAttribute.WA_TransparentForMouseEvents)
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def setDropArea(self, area):
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self.dropArea = area
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if area is None:
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self.hide()
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else:
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## Resize overlay to just the region where drop area should be displayed.
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## This works around a Qt bug--can't display transparent widgets over QGLWidget
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prgn = self.parent().rect()
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rgn = QtCore.QRect(prgn)
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w = min(30, prgn.width()/3.)
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h = min(30, prgn.height()/3.)
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if self.dropArea == 'left':
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rgn.setWidth(w)
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elif self.dropArea == 'right':
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rgn.setLeft(rgn.left() + prgn.width() - w)
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elif self.dropArea == 'top':
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rgn.setHeight(h)
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elif self.dropArea == 'bottom':
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rgn.setTop(rgn.top() + prgn.height() - h)
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elif self.dropArea == 'center':
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rgn.adjust(w, h, -w, -h)
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self.setGeometry(rgn)
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self.show()
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self.update()
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def paintEvent(self, ev):
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if self.dropArea is None:
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return
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p = QtGui.QPainter(self)
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rgn = self.rect()
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p.setBrush(QtGui.QBrush(QtGui.QColor(100, 100, 255, 50)))
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p.setPen(QtGui.QPen(QtGui.QColor(50, 50, 150), 3))
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p.drawRect(rgn)
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