pyaudviz/src/components/life.py

from PyQt5 import QtGui, QtCore, QtWidgets
from PyQt5.QtWidgets import QUndoCommand
from PIL import Image, ImageDraw, ImageEnhance, ImageChops, ImageFilter
import os
import math

from component import Component
from toolkit.frame import BlankFrame, scale


class Component(Component):
    name = 'Conway\'s Game of Life'
    version = '1.0.0'

    def widget(self, *args):
        super().widget(*args)
        self.scale = 32
        self.updateGridSize()
        self.startingGrid = set()
        self.page.pushButton_pickImage.clicked.connect(self.pickImage)
        self.trackWidgets({
            'tickRate': self.page.spinBox_tickRate,
            'scale': self.page.spinBox_scale,
            'color': self.page.lineEdit_color,
            'shapeType': self.page.comboBox_shapeType,
            'shadow': self.page.checkBox_shadow,
            'customImg': self.page.checkBox_customImg,
            'showGrid': self.page.checkBox_showGrid,
            'image': self.page.lineEdit_image,
        }, colorWidgets={
            'color': self.page.pushButton_color,
        })
        self.shiftButtons = (
            self.page.toolButton_up,
            self.page.toolButton_down,
            self.page.toolButton_left,
            self.page.toolButton_right,
        )

        def shiftFunc(i):
            def shift():
                self.shiftGrid(i)
            return shift
        shiftFuncs = [shiftFunc(i) for i in range(len(self.shiftButtons))]
        for i, widget in enumerate(self.shiftButtons):
            widget.clicked.connect(shiftFuncs[i])
        self.page.spinBox_scale.setValue(self.scale)
        self.page.spinBox_scale.valueChanged.connect(self.updateGridSize)

    def pickImage(self):
        imgDir = self.settings.value("componentDir", os.path.expanduser("~"))
        filename, _ = QtWidgets.QFileDialog.getOpenFileName(
            self.page, "Choose Image", imgDir,
            "Image Files (%s)" % " ".join(self.core.imageFormats))
        if filename:
            self.settings.setValue("componentDir", os.path.dirname(filename))
            self.mergeUndo = False
            self.page.lineEdit_image.setText(filename)
            self.mergeUndo = True

    def shiftGrid(self, d):
        action = ShiftGrid(self, d)
        self.parent.undoStack.push(action)

    def update(self):
        self.updateGridSize()
        if self.page.checkBox_customImg.isChecked():
            self.page.label_color.setVisible(False)
            self.page.lineEdit_color.setVisible(False)
            self.page.pushButton_color.setVisible(False)
            self.page.label_shape.setVisible(False)
            self.page.comboBox_shapeType.setVisible(False)
            self.page.label_image.setVisible(True)
            self.page.lineEdit_image.setVisible(True)
            self.page.pushButton_pickImage.setVisible(True)
        else:
            self.page.label_color.setVisible(True)
            self.page.lineEdit_color.setVisible(True)
            self.page.pushButton_color.setVisible(True)
            self.page.label_shape.setVisible(True)
            self.page.comboBox_shapeType.setVisible(True)
            self.page.label_image.setVisible(False)
            self.page.lineEdit_image.setVisible(False)
            self.page.pushButton_pickImage.setVisible(False)
        enabled = (len(self.startingGrid) > 0)
        for widget in self.shiftButtons:
            widget.setEnabled(enabled)

    def previewClickEvent(self, pos, size, button):
        pos = (
            math.ceil((pos[0] / size[0]) * self.gridWidth) - 1,
            math.ceil((pos[1] / size[1]) * self.gridHeight) - 1
        )
        action = ClickGrid(self, pos, button)
        self.parent.undoStack.push(action)

    def updateGridSize(self):
        w, h = self.core.resolutions[-1].split('x')
        self.gridWidth = int(int(w) / self.scale)
        self.gridHeight = int(int(h) / self.scale)
        self.pxWidth = math.ceil(self.width / self.gridWidth)
        self.pxHeight = math.ceil(self.height / self.gridHeight)

    def previewRender(self):
        return self.drawGrid(self.startingGrid)

    def preFrameRender(self, *args, **kwargs):
        super().preFrameRender(*args, **kwargs)
        self.progressBarSetText.emit("Computing evolution...")
        self.tickGrids = {0: self.startingGrid}
        tick = 0
        for frameNo in range(
                self.tickRate, self.audioArrayLen, self.sampleSize
                ):
            if self.parent.canceled:
                break
            if frameNo % self.tickRate == 0:
                tick += 1
                self.tickGrids[tick] = self.gridForTick(tick)

                # update progress bar
                progress = int(100*(frameNo/self.audioArrayLen))
                if progress >= 100:
                    progress = 100
                pStr = "Computing evolution: "+str(progress)+'%'
                self.progressBarSetText.emit(pStr)
                self.progressBarUpdate.emit(int(progress))

    def properties(self):
        if self.customImg and (
                not self.image or not os.path.exists(self.image)
                ):
            return ['error']
        return []

    def error(self):
        return "No image selected to represent life."

    def frameRender(self, frameNo):
        tick = math.floor(frameNo / self.tickRate)
        grid = self.tickGrids[tick]
        return self.drawGrid(grid)

    def drawGrid(self, grid):
        frame = BlankFrame(self.width, self.height)

        def drawCustomImg():
            try:
                img = Image.open(self.image)
            except Exception:
                return
            img = img.resize((self.pxWidth, self.pxHeight), Image.ANTIALIAS)
            frame.paste(img, box=(drawPtX, drawPtY))

        def drawShape():
            drawer = ImageDraw.Draw(frame)
            rect = (
                (drawPtX, drawPtY),
                (drawPtX + self.pxWidth, drawPtY + self.pxHeight)
            )
            shape = self.page.comboBox_shapeType.currentText().lower()

            # Rectangle
            if shape == 'rectangle':
                drawer.rectangle(rect, fill=self.color)

            # Elliptical
            elif shape == 'elliptical':
                drawer.ellipse(rect, fill=self.color)

            tenthX, tenthY = scale(10, self.pxWidth, self.pxHeight, int)
            smallerShape = (
                (drawPtX + tenthX + int(tenthX / 4),
                    drawPtY + tenthY + int(tenthY / 2)),
                (drawPtX + self.pxWidth - tenthX - int(tenthX / 4),
                    drawPtY + self.pxHeight - (tenthY + int(tenthY / 2)))
            )
            outlineShape = (
                (drawPtX + int(tenthX / 4),
                    drawPtY + int(tenthY / 2)),
                (drawPtX + self.pxWidth - int(tenthX / 4),
                    drawPtY + self.pxHeight - int(tenthY / 2))
            )
            # Circle
            if shape == 'circle':
                drawer.ellipse(outlineShape, fill=self.color)
                drawer.ellipse(smallerShape, fill=(0, 0, 0, 0))

            # Lilypad
            elif shape == 'lilypad':
                drawer.pieslice(smallerShape, 290, 250, fill=self.color)

            # Pac-Man
            elif shape == 'pac-man':
                drawer.pieslice(outlineShape, 35, 320, fill=self.color)

            hX, hY = scale(50, self.pxWidth, self.pxHeight, int)  # halfline
            tX, tY = scale(33, self.pxWidth, self.pxHeight, int)  # thirdline
            qX, qY = scale(20, self.pxWidth, self.pxHeight, int)  # quarterline

            # Path
            if shape == 'path':
                drawer.ellipse(rect, fill=self.color)
                rects = {
                    direction: False
                    for direction in (
                        'up', 'down', 'left', 'right',
                    )
                }
                for cell in self.nearbyCoords(x, y):
                    if cell not in grid:
                        continue
                    if cell[0] == x:
                        if cell[1] < y:
                            rects['up'] = True
                        if cell[1] > y:
                            rects['down'] = True
                    if cell[1] == y:
                        if cell[0] < x:
                            rects['left'] = True
                        if cell[0] > x:
                            rects['right'] = True

                for direction, rect in rects.items():
                    if rect:
                        if direction == 'up':
                            sect = (
                                (drawPtX, drawPtY),
                                (drawPtX + self.pxWidth, drawPtY + hY)
                            )
                        elif direction == 'down':
                            sect = (
                                (drawPtX, drawPtY + hY),
                                (drawPtX + self.pxWidth,
                                    drawPtY + self.pxHeight)
                            )
                        elif direction == 'left':
                            sect = (
                                (drawPtX, drawPtY),
                                (drawPtX + hX,
                                    drawPtY + self.pxHeight)
                            )
                        elif direction == 'right':
                            sect = (
                                (drawPtX + hX, drawPtY),
                                (drawPtX + self.pxWidth,
                                    drawPtY + self.pxHeight)
                            )
                        drawer.rectangle(sect, fill=self.color)

            # Duck
            elif shape == 'duck':
                duckHead = (
                    (drawPtX + qX, drawPtY + qY),
                    (drawPtX + int(qX * 3), drawPtY + int(tY * 2))
                )
                duckBeak = (
                    (drawPtX + hX, drawPtY + qY),
                    (drawPtX + self.pxWidth + qX,
                        drawPtY + int(qY * 3))
                )
                duckWing = (
                    (drawPtX, drawPtY + hY),
                    rect[1]
                )
                duckBody = (
                    (drawPtX + int(qX / 4), drawPtY + int(qY * 3)),
                    (drawPtX + int(tX * 2), drawPtY + self.pxHeight)
                )
                drawer.ellipse(duckBody, fill=self.color)
                drawer.ellipse(duckHead, fill=self.color)
                drawer.pieslice(duckWing, 130, 200, fill=self.color)
                drawer.pieslice(duckBeak, 145, 200, fill=self.color)

            # Peace
            elif shape == 'peace':
                line = ((
                    drawPtX + hX - int(tenthX / 2), drawPtY + int(tenthY / 2)),
                    (drawPtX + hX + int(tenthX / 2),
                        drawPtY + self.pxHeight - int(tenthY / 2))
                )
                drawer.ellipse(outlineShape, fill=self.color)
                drawer.ellipse(smallerShape, fill=(0, 0, 0, 0))
                drawer.rectangle(line, fill=self.color)

                def slantLine(difference):
                    return (
                        (drawPtX + difference),
                        (drawPtY + self.pxHeight - qY)
                    ),
                    (
                        (drawPtX + hX),
                        (drawPtY + hY)
                    )

                drawer.line(
                    slantLine(qX),
                    fill=self.color,
                    width=tenthX
                )
                drawer.line(
                    slantLine(self.pxWidth - qX),
                    fill=self.color,
                    width=tenthX
                )

        for x, y in grid:
            drawPtX = x * self.pxWidth
            if drawPtX > self.width:
                continue
            drawPtY = y * self.pxHeight
            if drawPtY > self.height:
                continue

            if self.customImg:
                drawCustomImg()
            else:
                drawShape()

        if self.shadow:
            shadImg = ImageEnhance.Contrast(frame).enhance(0.0)
            shadImg = shadImg.filter(ImageFilter.GaussianBlur(5.00))
            shadImg = ImageChops.offset(shadImg, -2, 2)
            shadImg.paste(frame, box=(0, 0), mask=frame)
            frame = shadImg
        if self.showGrid:
            drawer = ImageDraw.Draw(frame)
            w, h = scale(0.05, self.width, self.height, int)
            for x in range(self.pxWidth, self.width, self.pxWidth):
                drawer.rectangle(
                    ((x, 0),
                        (x + w, self.height)),
                    fill=self.color,
                )
            for y in range(self.pxHeight, self.height, self.pxHeight):
                drawer.rectangle(
                    ((0, y),
                        (self.width, y + h)),
                    fill=self.color,
                )

        return frame

    def gridForTick(self, tick):
        '''Given a tick number over 0, returns a new grid set of tuples'''
        lastGrid = self.tickGrids[tick - 1]

        def neighbours(x, y):
            return {
                cell for cell in self.nearbyCoords(x, y)
                if cell in lastGrid
            }

        newGrid = set()
        for x, y in lastGrid:
            surrounding = len(neighbours(x, y))
            if surrounding == 2 or surrounding == 3:
                newGrid.add((x, y))
        potentialNewCells = {
            coordTup for origin in lastGrid
            for coordTup in list(self.nearbyCoords(*origin))
        }
        for x, y in potentialNewCells:
            if (x, y) in newGrid:
                continue
            surrounding = len(neighbours(x, y))
            if surrounding == 3:
                newGrid.add((x, y))

        return newGrid

    def savePreset(self):
        pr = super().savePreset()
        pr['GRID'] = sorted(self.startingGrid)
        return pr

    def loadPreset(self, pr, *args):
        self.startingGrid = set(pr['GRID'])
        if self.startingGrid:
            for widget in self.shiftButtons:
                widget.setEnabled(True)
        super().loadPreset(pr, *args)

    def nearbyCoords(self, x, y):
        yield x + 1, y + 1
        yield x + 1, y - 1
        yield x - 1, y + 1
        yield x - 1, y - 1
        yield x, y + 1
        yield x, y - 1
        yield x + 1, y
        yield x - 1, y


class ClickGrid(QUndoCommand):
    def __init__(self, comp, pos, id_):
        super().__init__(
            "click %s component #%s" % (comp.name, comp.compPos))
        self.comp = comp
        self.pos = [pos]
        self.id_ = id_

    def id(self):
        return self.id_

    def mergeWith(self, other):
        self.pos.extend(other.pos)
        return True

    def add(self):
        for pos in self.pos[:]:
            self.comp.startingGrid.add(pos)
        self.comp.update(auto=True)

    def remove(self):
        for pos in self.pos[:]:
            self.comp.startingGrid.discard(pos)
        self.comp.update(auto=True)

    def redo(self):
        if self.id_ == 1:  # Left-click
            self.add()
        elif self.id_ == 2:  # Right-click
            self.remove()

    def undo(self):
        if self.id_ == 1:  # Left-click
            self.remove()
        elif self.id_ == 2:  # Right-click
            self.add()

class ShiftGrid(QUndoCommand):
    def __init__(self, comp, direction):
        super().__init__(
            "change %s component #%s" % (comp.name, comp.compPos))
        self.comp = comp
        self.direction = direction
        self.distance = 1

    def id(self):
        return self.direction

    def mergeWith(self, other):
        self.distance += other.distance
        return True

    def newGrid(self, Xchange, Ychange):
        return {
            (x + Xchange, y + Ychange)
            for x, y in self.comp.startingGrid
        }

    def redo(self):
        if self.direction == 0:
            newGrid = self.newGrid(0, -self.distance)
        elif self.direction == 1:
            newGrid = self.newGrid(0, self.distance)
        elif self.direction == 2:
            newGrid = self.newGrid(-self.distance, 0)
        elif self.direction == 3:
            newGrid = self.newGrid(self.distance, 0)
        self.comp.startingGrid = newGrid
        self.comp._sendUpdateSignal()

    def undo(self):
        if self.direction == 0:
            newGrid = self.newGrid(0, self.distance)
        elif self.direction == 1:
            newGrid = self.newGrid(0, -self.distance)
        elif self.direction == 2:
            newGrid = self.newGrid(self.distance, 0)
        elif self.direction == 3:
            newGrid = self.newGrid(-self.distance, 0)
        self.comp.startingGrid = newGrid
        self.comp._sendUpdateSignal()