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#------------------------------------------------------------------------------
# This file is part of the OpenStructure project <www.openstructure.org>
#
# Copyright (C) 2008-2020 by the OpenStructure authors
#
# This library is free software; you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation; either version 3.0 of the License, or (at your option)
# any later version.
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#------------------------------------------------------------------------------
# -*- coding: utf-8 -*-
from ost import gui
from ost import gfx
from ost import mol
from PyQt5 import QtCore, QtGui, QtWidgets
from .color_select_widget import ColorSelectWidget
from .gradient_preset_widget import GradientPresetWidget
#Gradient Editor
class GradientEditor(QtWidgets.QWidget):
def __init__(self, parent=None):
QtWidgets.QWidget.__init__(self, parent)
self.parent_ = parent
#Create Ui elements
gradient_label = QtWidgets.QLabel("Gradient Editor")
font = gradient_label.font()
font.setBold(True)
self.prop_combo_box_ = QtWidgets.QComboBox()
self.gradient_preview_ = GradientPreview()
self.gradient_edit_ = GradientEdit(self.gradient_preview_,self)
self.gradient_preset_ = GradientPresetWidget(self.gradient_edit_)
self.prop_combo_box_.addItem("atom B-factor")
self.prop_combo_box_.addItem("average residue B-factor")
self.prop_combo_box_.addItem("X-Coordinate")
self.prop_combo_box_.addItem("Y-Coordinate")
self.prop_combo_box_.addItem("Z-Coordinate")
self.prop_combo_box_.addItem("Residue Number")
self.prop_combo_box_.addItem("Atom Charge")
self.props=["abfac","rbfac","x","y","z","rnum","acharge"]
grid = QtWidgets.QGridLayout()
grid.setContentsMargins(0,5,0,0)
grid.addWidget(gradient_label, 0, 0, 1, 1)
grid.addWidget(self.prop_combo_box_, 1, 0, 1, 1)
grid.addWidget(self.gradient_preview_, 2, 0, 1, 1)
grid.addWidget(self.gradient_edit_, 3, 0, 1, 1)
grid.setRowStretch(4, 1)
grid.addWidget(self.gradient_preset_, 5, 0, 1, 1)
self.setLayout(grid)
self.prop_combo_box_.currentIndexChanged.connect(self.Update)
self.gradient_edit_.gradientUpdated.connect(self.Update)
self.gradient_preset_.gradientSelected.connect(self.gradient_edit_.LoadGradient)
self.setMinimumSize(250,300)
def Update(self):
scene_selection = gui.SceneSelection.Instance()
for i in range(0,scene_selection.GetActiveNodeCount()):
node = scene_selection.GetActiveNode(i)
self.ChangeColor(node)
if(scene_selection.GetActiveViewCount() > 0):
entity = scene_selection.GetViewEntity()
view = scene_selection.GetViewUnion()
self.ChangeViewColor(entity,view)
def ChangeColor(self,node):
if isinstance(node, gfx.Entity) or isinstance(node, gfx.Surface):
node.CleanColorOps()
if self.parent_.GetCarbonsOnly():
node.ColorBy(self.props[self.prop_combo_box_.currentIndex()],
self.gradient_edit_.GetGfxGradient(), "ele=C")
else:
node.ColorBy(self.props[self.prop_combo_box_.currentIndex()],
self.gradient_edit_.GetGfxGradient())
def ChangeViewColor(self, entity, view):
if isinstance(entity, gfx.Entity) and isinstance(view, mol.EntityView):
if self.parent_.GetCarbonsOnly():
glco=gfx.GradientLevelColorOp(mol.QueryViewWrapper(mol.Query("ele=C"),view),self.props[self.prop_combo_box_.currentIndex()],self.gradient_edit_.GetGfxGradient(),mol.Prop.Level.UNSPECIFIED)
else:
glco=gfx.GradientLevelColorOp(mol.QueryViewWrapper(view),self.props[self.prop_combo_box_.currentIndex()],self.gradient_edit_.GetGfxGradient(),mol.Prop.Level.UNSPECIFIED)
entity.Apply(glco)
#Gradient Preview
class GradientPreview(QtWidgets.QWidget):
def __init__(self, parent=None):
QtWidgets.QWidget.__init__(self, parent)
#Defaults
self.border_offset_ = 3
self.preview_height_ = 25
QtWidgets.QWidget.__init__(self, parent)
self.gradient_ = QtGui.QLinearGradient()
#Ui
self.setMinimumSize(0, self.preview_height_ + 4)
def SetGradient(self, gradient):
self.gradient_ = gradient
self.update()
def paintEvent(self, event):
if self.isEnabled() and self.gradient_ is not None:
size = self.size()
paint = QtGui.QPainter()
if paint.begin(self):
brush = QtGui.QBrush(self.gradient_)
paint.setBrush(brush)
paint.drawRect(self.border_offset_,
self.border_offset_,
size.width() - 2 * self.border_offset_,
self.preview_height_)
paint.end()
#Gradient Edit
class GradientEdit(QtWidgets.QWidget):
gradientUpdated = QtCore.pyqtSignal()
def __init__(self, gradient_preview, parent=None):
QtWidgets.QWidget.__init__(self, parent)
#Defaults
self.gradient_preview_ = gradient_preview
self.border_offset_ = self.gradient_preview_.border_offset_
self.edit_height_ = 20
#Stops
self.stops = list()
#ContextMenu
self.add_ = QtWidgets.QAction("Add", self)
self.add_.triggered.connect(self.Add)
self.addAction(self.add_)
self.setContextMenuPolicy(QtCore.Qt.ActionsContextMenu)
#Ui
pal = QtGui.QPalette(self.palette())
pal.setColor(QtGui.QPalette.Window, QtGui.QColor(255, 255, 255, 128))
self.setPalette(pal)
self.setAutoFillBackground(True)
self.gradient_ = QtGui.QLinearGradient()
self.setMinimumSize(0, self.edit_height_)
#Add Points
self.AddStop(self.border_offset_+3, QtGui.QColor("Red"))
self.AddStop(self.width()-(self.border_offset_+3), QtGui.QColor("Green"))
#Width Problem
self.width_ = self.width()
def RemoveStop(self, stop):
self.stops.remove(stop)
stop.hide()
del(stop)
self.UpdateGradient()
self.gradientUpdated.emit()
def RemoveStopGui(self, stop):
if(len(self.stops)>2):
self.RemoveStop(stop)
else:
QtWidgets.QMessageBox.question(self, "Information", "Please keep in mind, at least two stops are needed for a gradient!")
def AddStop(self, pos, color=None):
stop = MyGradientStop(pos, self.border_offset_, self, color)
stop.gradientChanged.connect(self.UpdateGradient)
stop.colorChanged.connect(self.UpdateGradient)
stop.colorChanged.connect(self.parent().Update)
stop.gradientUpdated.connect(self.parent().Update)
stop.removeStop.connect(self.RemoveStopGui)
stop.MoveToNewPos()
self.stops.append(stop)
self.UpdateGradient()
self.gradientUpdated.emit()
def Add(self):
self.AddStop(QtWidgets.QCursor.pos().x() - self.mapToGlobal(QtCore.QPoint(0, 0)).x())
def UpdateGradient(self):
self.gradient_preview_.SetGradient(self.GetGradient())
def GetGfxGradient(self):
gradient = gfx.Gradient()
for s in self.stops:
c=s.GetColor();
gradient.SetColorAt(s.GetRel(), gfx.RGB(c.redF(), c.greenF(), c.blueF()));
return gradient;
def GetGradient(self):
gradient = QtGui.QLinearGradient(self.border_offset_,
0,
self.size().width() - 2 * self.border_offset_,
0)
for s in self.stops:
gradient.setColorAt(s.GetRel(), s.GetColor())
return gradient
def LoadGradient(self, gradient):
stopcpy = self.stops[:]
for stop in stopcpy:
self.RemoveStop(stop)
gradStops = gradient.stops()
for stop in gradStops:
self.AddStop((self.width()-(2*self.border_offset_))*stop[0], stop[1])
#Overwritten methods
def mouseDoubleClickEvent(self, event):
self.AddStop(event.x())
def resizeEvent(self, event):
factor = 1/(float(self.width_)/event.size().width())
if(factor >=0):
for s in self.stops:
s.SetPos(s.GetPos() * factor)
self.UpdateGradient()
self.width_ = event.size().width()
#Gradient Stop
class MyGradientStop(ColorSelectWidget):
removeStop = QtCore.pyqtSignal()
gradientChanged = QtCore.pyqtSignal()
gradientUpdated = QtCore.pyqtSignal()
def __init__(self, pos, offset, parent, color=None):
#Defaults
self.length_ = 20
self.halflength_ = self.length_ / 2
self.pos_ = pos
self.offset_ = offset
ColorSelectWidget.__init__(self, self.length_,self.length_, color, parent)
if(color is None):
self.color_ = QtGui.QColor("White")
self.ChangeColor()
else:
self.color_ = color
#ContextMenu
self.remove_ = QtWidgets.QAction("Remove", self)
self.remove_.triggered.connect(self.Remove)
self.addAction(self.remove_)
def Remove(self):
self.removeStop.emit()
def GetPos(self):
return self.pos_
def SetPos(self, pos):
self.pos_ = pos
self.MoveToNewPos()
def GetRel(self):
rel = self.pos_ / float(self.parent().width() - 2 * self.offset_)
if rel > 1:
return 1
elif rel < 0:
return 0
return rel
def MoveToNewPos(self):
self.move(int(self.pos_ - self.halflength_), 0)
self.update()
self.gradientChanged.emit()
def mouseMoveEvent(self, event):
self.pos_ += event.pos().x() - self.halflength_
if self.pos_ <= self.offset_:
self.pos_ = self.offset_ + 1
elif self.pos_ >= self.parent().width() - 2*self.offset_:
self.pos_ = self.parent().width() - (2*self.offset_ + 1)
self.MoveToNewPos()
def mouseDoubleClickEvent(self, event):
self.ChangeColor()
def mouseReleaseEvent(self, entity):
if entity.button() == QtCore.Qt.LeftButton:
self.gradientUpdated.emit()
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