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designerscene.py
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designerscene.py
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#############################################################################
# Copyright (C) 2019 Olaf Japp
#
# This file is part of UXDesigner.
#
# UXDesigner is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# UXDesigner 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with UXDesigner. If not, see <http://www.gnu.org/licenses/>.
#
#############################################################################
from PyQt5.QtWidgets import QGraphicsScene, QGraphicsItem, QFileDialog
from PyQt5.QtGui import QColor, QBrush, QPen
from PyQt5.QtCore import QRectF, Qt, QPointF, pyqtSignal
from rectangle import Rectangle
from itemhandle import ItemHandle
from designitem import DesignItem
from command import AddItemCommand, MoveItemCommand, DeleteItemCommand
class DesignerScene(QGraphicsScene):
itemRemoved = pyqtSignal(object)
itemAdded = pyqtSignal(object)
SELECT = 0
RECTANGLE = 1
ELLIPSE = 2
TEXT = 3
BITMAP = 4
SVG = 5
PLUGIN = 6
def __init__(self):
super(DesignerScene, self).__init__()
self.initialize()
def initialize(self):
self.setSceneRect(0, 0, 1200, 720)
self.edit_mode = DesignerScene.SELECT
self.copy = None
self.movingItem = None
self.scaling = 1
self.addBackgroundRect()
self.blackSelectionRect = None
def deleteItem(self, item):
deleteCommand = DeleteItemCommand(item, self)
self.undostack.push(deleteCommand)
def setScaling(self, scaling):
self.scaling = scaling
def setUndostack(self, st):
self.undostack = st
def reset(self):
self.clear()
self.initialize()
self.undoStack.clear()
def addBackgroundRect(self):
self.rect = Rectangle(self, True)
self.rect.setId("Scene")
self.rect.setPos(0,0)
self.rect.setWidth(self.width())
self.rect.setHeight(self.height())
backgroundColor = QColor("#404244")
self.rect.setBrush(QBrush(QColor(backgroundColor)))
self.addItem(self.rect)
def setCursor(self, cursor):
self.rect.setCursor(cursor)
def setEditMode(self, mode):
self.edit_mode = mode
def mousePressEvent(self, mouseEvent):
self.oldPos = QPointF(0, 0)
self.movingItem = None
if mouseEvent.button() != Qt.LeftButton:
return
if self.edit_mode == DesignerScene.SELECT:
handle = None
mousePos = QPointF(mouseEvent.buttonDownScenePos(Qt.LeftButton).x(), mouseEvent.buttonDownScenePos(Qt.LeftButton).y())
itemList = self.items(mousePos)
for item in itemList:
if isinstance(item, ItemHandle):
handle = item
break
elif isinstance(item, DesignItem):
if not item.isSceneRect():
self.movingItem = item
self.oldPos = item.pos()
break
if not self.movingItem and not handle:
self.blackSelectionRect = self.addRect(0, 0, 1, 1, QPen(QColor("#000000")))
self.blackSelectionRect.setPos(mousePos)
self.whiteSelectionRect = self.addRect(1, 1, 1, 1, QPen(QColor("#ffffff")))
self.whiteSelectionRect.setPos(mousePos)
super().mousePressEvent(mouseEvent)
else:
filter = ""
fileName = ""
if self.edit_mode == DesignerScene.BITMAP:
filter = "Image Files (*.png *.jpeg *.jpg *.gif *.bmp)All Files (*)"
title = "Open Bitmap"
elif self.edit_mode == DesignerScene.SVG:
filter = "SVG Files (*.svg)All Files (*)"
title = "Open SVG"
if filter:
dialog = QFileDialog()
dialog.setFileMode(QFileDialog.AnyFile)
dialog.setNameFilter(filter)
dialog.setWindowTitle(title)
dialog.setOption(QFileDialog.DontUseNativeDialog, True)
dialog.setAcceptMode(QFileDialog.AcceptOpen)
if dialog.exec():
fileName = dialog.selectedFiles()[0]
del dialog
if not fileName:
return
addCommand = AddItemCommand(mouseEvent.scenePos().x(), mouseEvent.scenePos().y(), self.edit_mode, fileName, self)
self.undostack.push(addCommand)
def mouseMoveEvent(self, mouseEvent):
if self.edit_mode == DesignerScene.SELECT and self.blackSelectionRect:
self.blackSelectionRect.setRect(0, 0, mouseEvent.lastScenePos().x() - self.blackSelectionRect.pos().x(), mouseEvent.lastScenePos().y() - self.blackSelectionRect.pos().y())
self.whiteSelectionRect.setRect(1, 1, mouseEvent.lastScenePos().x() - self.blackSelectionRect.pos().x(), mouseEvent.lastScenePos().y() - self.blackSelectionRect.pos().y())
super().mouseMoveEvent(mouseEvent)
def mouseReleaseEvent(self, mouseEvent):
if self.edit_mode == DesignerScene.SELECT and self.blackSelectionRect:
itemList = self.items(self.blackSelectionRect.pos().x(), self.blackSelectionRect.pos().y(), self.blackSelectionRect.rect().width(), self.blackSelectionRect.rect().height(), Qt.IntersectsItemShape, Qt.AscendingOrder)
for item in itemList:
item.setSelected(True)
self.removeItem(self.blackSelectionRect)
self.removeItem(self.whiteSelectionRect)
del self.blackSelectionRect
del self.whiteSelectionRect
self.blackSelectionRect = None
self.whiteSelectionRect = None
if self.movingItem and mouseEvent.button() == Qt.LeftButton:
if self.oldPos != self.movingItem.pos():
cmd = MoveItemCommand(self.movingItem.x(), self.movingItem.y(), self.oldPos.x(), self.oldPos.y(), self.movingItem)
self.undostack.push(cmd)
self.movingItem = None
super().mouseReleaseEvent(mouseEvent)