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viewer_app.py
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viewer_app.py
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from texture_builder import TextureBuilder
from texture import Texture
from palette import Palette
from folder import Folder
import os.path
from functools import partial
from PyQt5.QtCore import QDir
from PyQt5.QtGui import QImage, QPalette, QPixmap
from PyQt5.QtWidgets import (QAction, QFileDialog, QLabel,
QMainWindow, QMenu, QScrollArea, QSizePolicy, QComboBox)
from color_ramp_widget import ColorRampWidget
from image_gallery import ImageGallery
class ViewerApp(QMainWindow):
def __init__(self):
super(ViewerApp, self).__init__()
self.name = 'Parkan Image Viewer'
self.scale_factor = 0.0
self.scale_step = 0.25
self.min_zoom = 0.333
self.max_zoom = 3
self.init_window_elements()
self.setWindowTitle(self.name)
self.resize(500, 400)
self.palette = None
self.last_image = None
self.palette_window = None
self.gallery = ImageGallery()
def init_window_elements(self):
self.create_image_label()
self.create_scroll_area()
self.create_actions()
self.create_menus()
def create_scroll_area(self):
scroll_area = QScrollArea()
scroll_area.setBackgroundRole(QPalette.Dark)
if not self.image_label:
raise 'Image label not initialized!'
scroll_area.setWidget(self.image_label)
self.setCentralWidget(scroll_area)
self.scroll_area = scroll_area
def create_image_label(self):
label = QLabel()
label.setBackgroundRole(QPalette.Base)
label.setSizePolicy(QSizePolicy.Ignored, QSizePolicy.Ignored)
label.setScaledContents(True)
self.image_label = label
def open(self):
file_name, _ = QFileDialog.getOpenFileName(self, 'Open image', os.path.join(QDir.currentPath(), Texture.get_textures_folder()))
if file_name and self.palette:
self.last_image = TextureBuilder().get_texture(file_name)
self.scale_factor = 1.0
self.update_image()
self.update_actions()
def choose_palette(self, palette_file):
palette_file = Palette.get_abs_path(palette_file)
if palette_file:
self.palette = Palette(palette_file)
self.update_image()
self.update_actions()
self.palette_window = ColorRampWidget(self.palette)
def update_image(self):
if not self.last_image:
return
image_data = self.last_image.get_pixels(self.palette)
ht, wd, channels = image_data.shape
image = QImage(image_data, wd, ht, channels * wd, QImage.Format_RGB888)
if not image.isNull():
image = image.rgbSwapped()
QPixmap.fromImage(image)
self.image_label.setPixmap(QPixmap.fromImage(image))
self.fit_to_window_act.setEnabled(True)
if not self.fit_to_window_act.isChecked():
self.image_label.adjustSize()
def zoom_in(self):
self.scale_image(1 + self.scale_step)
def zoom_out(self):
self.scale_image(1 / (1 + self.scale_step))
def normal_size(self):
self.image_label.adjustSize()
self.scale_factor = 1.0
def fit_to_window(self):
fit_to_window = self.fit_to_window_act.isChecked()
self.scroll_area.setWidgetResizable(fit_to_window)
if not fit_to_window:
self.normal_size()
self.update_actions()
def create_choose_palette_action(self, palette_file):
return QAction(os.path.basename(palette_file), self,
enabled=True, triggered=partial(self.choose_palette, os.path.basename(palette_file)))
def create_actions(self):
self.open_act = QAction('&Open image...', self, shortcut='Ctrl+O',
enabled=False, triggered=self.open)
self.choose_palette_act_dict = {os.path.basename(palette_file): self.create_choose_palette_action(palette_file)
for palette_file in Palette.get_palette_files()}
self.exit_act = QAction('E&xit', self, shortcut='Ctrl+Q',
triggered=self.close)
self.zoom_in_act = QAction('Zoom &In ({}%)'.format(int(100*self.scale_step)), self, shortcut='Ctrl++',
enabled=False, triggered=self.zoom_in)
self.zoom_out_act = QAction('Zoom &Out ({}%)'.format(int(100*self.scale_step)), self, shortcut='Ctrl+-',
enabled=False, triggered=self.zoom_out)
self.normal_size_act = QAction('&Normal Size', self, shortcut='Ctrl+N',
enabled=False, triggered=self.normal_size)
self.fit_to_window_act = QAction('&Fit to Window', self, enabled=False,
checkable=True, shortcut='Ctrl+F', triggered=self.fit_to_window)
self.save_single_image_act = QAction('&Save image', self, enabled=False,
shortcut='Ctrl+S', triggered=self.save_single_image)
self.create_gallery_act = QAction('&Create gallery', self, shortcut='Ctrl+G',
enabled=False, triggered=self.create_gallery_folder)
def create_gallery_folder(self):
folder_path = QFileDialog.getExistingDirectory(self, 'Choose folder with images',
os.path.join(QDir.currentPath(), Texture.get_textures_folder()))
if folder_path:
self.create_gallery(folder_path)
def create_gallery(self, folder_path):
if not self.palette:
return
folder = Folder(os.path.basename(folder_path), folder_path)
all_textures = folder.get_texture_files()
images = []
for texture_filename in all_textures:
cur_texture = TextureBuilder().get_texture(texture_filename)
if not cur_texture:
continue
image_data = cur_texture.get_pixels(self.palette)
ht, wd, channels = image_data.shape
image = QImage(image_data, wd, ht, channels * wd, QImage.Format_RGB888)
if not image.isNull():
image = image.rgbSwapped()
images.append(QPixmap.fromImage(image))
self.gallery.populate(images=images, size=50)
self.gallery.show()
def create_menus(self):
self.fileMenu = QMenu("&File", self)
self.fileMenu.addAction(self.open_act)
self.fileMenu.addAction(self.save_single_image_act)
combo = QComboBox(self)
for palette_file in self.choose_palette_act_dict:
combo.addItem(palette_file)
combo.activated[str].connect(self.choose_palette)
combo.move(400,30)
choose_palette_menu = self.fileMenu.addMenu('&Choose Palette')
for palette_file, choose_palette_action in self.choose_palette_act_dict.items():
choose_palette_menu.addAction(choose_palette_action)
self.fileMenu.addAction(self.create_gallery_act)
self.fileMenu.addSeparator()
self.fileMenu.addAction(self.exit_act)
self.viewMenu = QMenu("&View", self)
self.viewMenu.addAction(self.zoom_in_act)
self.viewMenu.addAction(self.zoom_out_act)
self.viewMenu.addAction(self.normal_size_act)
self.viewMenu.addSeparator()
self.viewMenu.addAction(self.fit_to_window_act)
self.menuBar().addMenu(self.fileMenu)
self.menuBar().addMenu(self.viewMenu)
def has_palette(self):
return self.palette is not None
def has_image(self):
return self.last_image is not None
def update_actions(self):
self.open_act.setEnabled(self.has_palette())
self.create_gallery_act.setEnabled(self.has_palette())
self.zoom_in_act.setEnabled(not self.fit_to_window_act.isChecked())
self.zoom_out_act.setEnabled(not self.fit_to_window_act.isChecked())
self.normal_size_act.setEnabled(not self.fit_to_window_act.isChecked())
self.save_single_image_act.setEnabled(self.has_image())
def save_single_image(self):
if not self.last_image or not self.palette:
return
file_name, _ = QFileDialog.getSaveFileName(self, 'Save image',
os.path.join(QDir.currentPath(), Texture.get_textures_folder()),
filter='*.png;;*.bmp')
if not file_name:
return
self.last_image.save(file_name, self.palette)
def scale_image(self, factor):
self.scale_factor *= factor
self.image_label.resize(self.scale_factor * self.image_label.pixmap().size())
self.adjust_scroll_bar(self.scroll_area.horizontalScrollBar(), factor)
self.adjust_scroll_bar(self.scroll_area.verticalScrollBar(), factor)
self.zoom_in_act.setEnabled(self.scale_factor < self.max_zoom)
self.zoom_out_act.setEnabled(self.scale_factor > self.min_zoom)
def adjust_scroll_bar(self, scroll_bar, factor):
scroll_bar.setValue(int(factor * scroll_bar.value()
+ ((factor - 1) * scroll_bar.pageStep() / 2)))