pyaudviz/components/color.py

from PIL import Image, ImageDraw
from PyQt4 import uic, QtGui, QtCore
from PyQt4.QtGui import QColor
from PIL.ImageQt import ImageQt
import os
from . import __base__


class Component(__base__.Component):
    '''Color'''

    modified = QtCore.pyqtSignal(int, dict)

    def widget(self, parent):
        self.parent = parent
        page = uic.loadUi(os.path.join(
            os.path.dirname(os.path.realpath(__file__)), 'color.ui'))

        self.color1 = (0, 0, 0)
        self.color2 = (133, 133, 133)
        self.x = 0
        self.y = 0

        page.lineEdit_color1.setText('%s,%s,%s' % self.color1)
        page.lineEdit_color2.setText('%s,%s,%s' % self.color2)

        btnStyle1 = "QPushButton { background-color : %s; outline: none; }" \
            % QColor(*self.color1).name()

        btnStyle2 = "QPushButton { background-color : %s; outline: none; }" \
            % QColor(*self.color2).name()

        page.pushButton_color1.setStyleSheet(btnStyle1)
        page.pushButton_color2.setStyleSheet(btnStyle2)
        page.pushButton_color1.clicked.connect(lambda: self.pickColor(1))
        page.pushButton_color2.clicked.connect(lambda: self.pickColor(2))

        # disable color #2 until non-default 'fill' option gets changed
        page.lineEdit_color2.setDisabled(True)
        page.pushButton_color2.setDisabled(True)
        page.spinBox_x.valueChanged.connect(self.update)
        page.spinBox_y.valueChanged.connect(self.update)
        page.spinBox_width.setValue(
            int(parent.settings.value("outputWidth")))
        page.spinBox_height.setValue(
            int(parent.settings.value("outputHeight")))

        page.lineEdit_color1.textChanged.connect(self.update)
        page.lineEdit_color2.textChanged.connect(self.update)
        page.spinBox_x.valueChanged.connect(self.update)
        page.spinBox_y.valueChanged.connect(self.update)
        page.spinBox_width.valueChanged.connect(self.update)
        page.spinBox_height.valueChanged.connect(self.update)
        page.checkBox_trans.stateChanged.connect(self.update)

        self.fillLabels = [ \
            'Solid',
            'Linear Gradient',
            'Radial Gradient',
        ]
        for label in self.fillLabels:
            page.comboBox_fill.addItem(label)
        page.comboBox_fill.setCurrentIndex(0)
        page.comboBox_fill.currentIndexChanged.connect(self.update)
        page.comboBox_spread.currentIndexChanged.connect(self.update)
        page.spinBox_radialGradient_end.valueChanged.connect(self.update)
        page.spinBox_radialGradient_start.valueChanged.connect(self.update)
        page.spinBox_radialGradient_spread.valueChanged.connect(self.update)
        page.spinBox_linearGradient_end.valueChanged.connect(self.update)
        page.spinBox_linearGradient_start.valueChanged.connect(self.update)
        page.checkBox_stretch.stateChanged.connect(self.update)

        self.page = page
        return page

    def update(self):
        self.color1 = self.RGBFromString(self.page.lineEdit_color1.text())
        self.color2 = self.RGBFromString(self.page.lineEdit_color2.text())
        self.x = self.page.spinBox_x.value()
        self.y = self.page.spinBox_y.value()
        self.sizeWidth = self.page.spinBox_width.value()
        self.sizeHeight = self.page.spinBox_height.value()
        self.trans = self.page.checkBox_trans.isChecked()
        self.spread = self.page.comboBox_spread.currentIndex()

        self.RG_start = self.page.spinBox_radialGradient_start.value()
        self.RG_end = self.page.spinBox_radialGradient_end.value()
        self.RG_centre = self.page.spinBox_radialGradient_spread.value()
        self.stretch = self.page.checkBox_stretch.isChecked()
        self.LG_start = self.page.spinBox_linearGradient_start.value()
        self.LG_end = self.page.spinBox_linearGradient_end.value()

        self.fillType = self.page.comboBox_fill.currentIndex()
        if self.fillType == 0:
            self.page.lineEdit_color2.setEnabled(False)
            self.page.pushButton_color2.setEnabled(False)
            self.page.checkBox_trans.setEnabled(False)
            self.page.checkBox_stretch.setEnabled(False)
            self.page.comboBox_spread.setEnabled(False)
        else:
            self.page.lineEdit_color2.setEnabled(True)
            self.page.pushButton_color2.setEnabled(True)
            self.page.checkBox_trans.setEnabled(True)
            self.page.checkBox_stretch.setEnabled(True)
            self.page.comboBox_spread.setEnabled(True)
        self.page.fillWidget.setCurrentIndex(self.fillType)

        self.parent.drawPreview()
        super().update()

    def previewRender(self, previewWorker):
        width = int(previewWorker.core.settings.value('outputWidth'))
        height = int(previewWorker.core.settings.value('outputHeight'))
        return self.drawFrame(width, height)

    def preFrameRender(self, **kwargs):
        super().preFrameRender(**kwargs)
        return ['static']

    def frameRender(self, moduleNo, arrayNo, frameNo):
        width = int(self.worker.core.settings.value('outputWidth'))
        height = int(self.worker.core.settings.value('outputHeight'))
        return self.drawFrame(width, height)

    def drawFrame(self, width, height):
        r, g, b = self.color1
        shapeSize = (self.sizeWidth, self.sizeHeight)
        # in default state, skip all this logic and return a plain fill
        if self.fillType==0 and shapeSize == (width, height) \
            and self.x == 0 and self.y == 0:
            return Image.new("RGBA", (width, height), (r, g, b, 255))

        frame = self.blankFrame(width, height)

        # Return a solid image at x, y
        if self.fillType == 0:
            image = Image.new("RGBA", shapeSize, (r, g, b, 255))
            frame.paste(image, box=(self.x, self.y))
            return frame

        # Now fills that require using Qt...
        elif self.fillType > 0:
            image = ImageQt(frame)
            painter = QtGui.QPainter(image)
            if self.stretch:
                w = width; h = height
            else:
                w = self.sizeWidth; h = self.sizeWidth

        if self.fillType == 1:  # Linear Gradient
            brush = QtGui.QLinearGradient(
                self.LG_start,
                self.LG_start,
                self.LG_start+width/3,
                self.LG_end)

        elif self.fillType == 2:  # Radial Gradient
            brush = QtGui.QRadialGradient(
                self.RG_start,
                self.RG_end,
                w, h,
                self.RG_centre)

        brush.setSpread(self.spread)
        brush.setColorAt(0.0, QColor(*self.color1))
        if self.trans:
            brush.setColorAt(1.0, QColor(0, 0, 0, 0))
        elif self.fillType == 1 and self.stretch:
            brush.setColorAt(0.2, QColor(*self.color2))
        else:
            brush.setColorAt(1.0, QColor(*self.color2))
        painter.setBrush(brush)
        painter.drawRect(self.x, self.y,
            self.sizeWidth, self.sizeHeight)
        painter.end()
        imBytes = image.bits().asstring(image.numBytes())
        return Image.frombytes('RGBA', (width, height), imBytes)

    def loadPreset(self, pr, presetName=None):
        super().loadPreset(pr, presetName)

        self.page.comboBox_fill.setCurrentIndex(pr['fillType'])
        self.page.lineEdit_color1.setText('%s,%s,%s' % pr['color1'])
        self.page.lineEdit_color2.setText('%s,%s,%s' % pr['color2'])
        self.page.spinBox_x.setValue(pr['x'])
        self.page.spinBox_y.setValue(pr['y'])
        self.page.spinBox_width.setValue(pr['width'])
        self.page.spinBox_height.setValue(pr['height'])
        self.page.checkBox_trans.setChecked(pr['trans'])

        self.page.spinBox_radialGradient_start.setValue(pr['RG_start'])
        self.page.spinBox_radialGradient_end.setValue(pr['RG_end'])
        self.page.spinBox_radialGradient_spread.setValue(pr['RG_centre'])
        self.page.spinBox_linearGradient_start.setValue(pr['LG_start'])
        self.page.spinBox_linearGradient_end.setValue(pr['LG_end'])
        self.page.checkBox_stretch.setChecked(pr['stretch'])
        self.page.comboBox_spread.setCurrentIndex(pr['spread'])

        btnStyle1 = "QPushButton { background-color : %s; outline: none; }" \
            % QColor(*pr['color1']).name()
        btnStyle2 = "QPushButton { background-color : %s; outline: none; }" \
            % QColor(*pr['color2']).name()
        self.page.pushButton_color1.setStyleSheet(btnStyle1)
        self.page.pushButton_color2.setStyleSheet(btnStyle2)

    def savePreset(self):
        return {
            'preset': self.currentPreset,
            'color1': self.color1,
            'color2': self.color2,
            'x': self.x,
            'y': self.y,
            'fillType': self.fillType,
            'width': self.sizeWidth,
            'height': self.sizeHeight,
            'trans': self.trans,
            'stretch': self.stretch,
            'spread': self.spread,
            'RG_start': self.RG_start,
            'RG_end': self.RG_end,
            'RG_centre': self.RG_centre,
            'LG_start': self.LG_start,
            'LG_end': self.LG_end,
        }

    def pickColor(self, num):
        RGBstring, btnStyle = super().pickColor()
        if not RGBstring:
            return
        if num == 1:
            self.page.lineEdit_color1.setText(RGBstring)
            self.page.pushButton_color1.setStyleSheet(btnStyle)
        else:
            self.page.lineEdit_color2.setText(RGBstring)
            self.page.pushButton_color2.setStyleSheet(btnStyle)

    def commandHelp(self):
        print('Specify a color:\n    color=255,255,255')

    def command(self, arg):
        if not arg.startswith('preset=') and '=' in arg:
            key, arg = arg.split('=', 1)
            if key == 'color':
                self.page.lineEdit_color1.setText(arg)
                return
        super().command(arg)