250 lines
8.4 KiB
Python
250 lines
8.4 KiB
Python
from concurrent.futures import Future
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import math
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from typing import Optional
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import gi
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gi.require_version('Gtk', '3.0')
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from gi.repository import GLib, Gtk, GObject, Gio, Pango
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from libremsonic.ui import util
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from libremsonic.state_manager import ApplicationState
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from .spinner_image import SpinnerImage
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class CoverArtGrid(Gtk.ScrolledWindow):
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"""Defines a grid with cover art."""
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__gsignals__ = {
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'song-clicked': (
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GObject.SignalFlags.RUN_FIRST,
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GObject.TYPE_NONE,
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(object, ),
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)
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}
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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# This is the master list.
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self.list_store = Gio.ListStore()
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self.selected_list_store_index = None
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self.items_per_row = 4
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overlay = Gtk.Overlay()
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grid_detail_grid_box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
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self.grid_top = Gtk.FlowBox(
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vexpand=True,
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hexpand=True,
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row_spacing=5,
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column_spacing=5,
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margin_top=12,
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margin_bottom=12,
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homogeneous=True,
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valign=Gtk.Align.START,
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halign=Gtk.Align.CENTER,
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selection_mode=Gtk.SelectionMode.SINGLE,
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)
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self.grid_top.connect('child-activated', self.on_child_activated)
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self.grid_top.connect('size-allocate', self.on_grid_resize)
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self.list_store_top = Gio.ListStore()
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self.grid_top.bind_model(self.list_store_top, self.create_widget)
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grid_detail_grid_box.add(self.grid_top)
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grid_detail_grid_box.add(Gtk.Label('foo'))
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self.grid_bottom = Gtk.FlowBox(
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vexpand=True,
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hexpand=True,
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row_spacing=5,
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column_spacing=5,
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margin_top=12,
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margin_bottom=12,
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homogeneous=True,
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valign=Gtk.Align.START,
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halign=Gtk.Align.CENTER,
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selection_mode=Gtk.SelectionMode.SINGLE,
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)
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self.grid_bottom.connect('child-activated', self.on_child_activated)
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self.list_store_bottom = Gio.ListStore()
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self.grid_bottom.bind_model(self.list_store_bottom, self.create_widget)
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grid_detail_grid_box.add(self.grid_bottom)
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overlay.add(grid_detail_grid_box)
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self.spinner = Gtk.Spinner(
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name='grid-spinner',
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active=True,
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halign=Gtk.Align.CENTER,
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valign=Gtk.Align.CENTER,
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)
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overlay.add_overlay(self.spinner)
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self.add(overlay)
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def update(self, state: ApplicationState = None):
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self.update_grid()
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def update_grid(self):
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def start_loading():
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self.spinner.show()
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def stop_loading():
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self.spinner.hide()
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def future_done(f):
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try:
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result = f.result()
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except Exception as e:
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print('fail', e)
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return
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selection = self.grid_top.get_selected_children()
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if selection:
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self.selected_list_store_index = selection[0].get_index()
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old_len = len(self.list_store)
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self.list_store.remove_all()
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for el in result:
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self.list_store.append(self.create_model_from_element(el))
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new_len = len(self.list_store)
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# Only force if there's a length change.
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# TODO, this doesn't handle when something is edited.
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self.reflow_grids(force_reload_from_master=old_len != new_len)
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stop_loading()
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future = self.get_model_list_future(before_download=start_loading)
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future.add_done_callback(lambda f: GLib.idle_add(future_done, f))
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def create_widget(self, item):
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widget_box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
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# Cover art image
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artwork = SpinnerImage(
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loading=False,
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image_name='grid-artwork',
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spinner_name='grid-artwork-spinner',
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)
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widget_box.pack_start(artwork, False, False, 0)
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def make_label(text, name):
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return Gtk.Label(
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name=name,
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label=text,
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tooltip_text=text,
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ellipsize=Pango.EllipsizeMode.END,
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max_width_chars=20,
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halign=Gtk.Align.START,
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)
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# Header for the widget
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header_text = self.get_header_text(item)
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header_label = make_label(header_text, 'grid-header-label')
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widget_box.pack_start(header_label, False, False, 0)
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# Extra info for the widget
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info_text = self.get_info_text(item)
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if info_text:
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info_label = make_label(info_text, 'grid-info-label')
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widget_box.pack_start(info_label, False, False, 0)
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# Download the cover art.
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def on_artwork_downloaded(f):
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artwork.set_from_file(f.result())
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artwork.set_loading(False)
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def start_loading():
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artwork.set_loading(True)
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cover_art_filename_future = self.get_cover_art_filename_future(
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item, before_download=lambda: GLib.idle_add(start_loading))
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cover_art_filename_future.add_done_callback(
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lambda f: GLib.idle_add(on_artwork_downloaded, f))
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widget_box.show_all()
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return widget_box
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def reflow_grids(self, force_reload_from_master=False):
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# Determine where the cuttoff is between the top and bottom grids.
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entries_before_fold = len(self.list_store)
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if self.selected_list_store_index is not None:
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entries_before_fold = ((
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(self.selected_list_store_index // self.items_per_row) + 1)
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* self.items_per_row)
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if force_reload_from_master:
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# Just remove everything and re-add all of the items.
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self.list_store_top.remove_all()
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self.list_store_bottom.remove_all()
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for e in self.list_store[:entries_before_fold]:
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self.list_store_top.append(e)
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for e in self.list_store[entries_before_fold:]:
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self.list_store_bottom.append(e)
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else:
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top_diff = len(self.list_store_top) - entries_before_fold
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if top_diff == 0:
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return
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elif top_diff < 0:
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# Move entries from the bottom store.
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for e in self.list_store_bottom[:-top_diff]:
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self.list_store_top.append(e)
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for _ in range(-top_diff):
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if len(self.list_store_bottom) == 0:
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break
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del self.list_store_bottom[0]
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else:
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# Move entries to the bottom store.
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for e in self.list_store_top[entries_before_fold:]:
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self.list_store_bottom.append(e)
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for _ in range(top_diff):
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del self.list_store_top[-1]
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# Virtual Methods
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# =========================================================================
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def get_header_text(self, item) -> str:
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raise NotImplementedError(
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'get_header_text must be implemented by the inheritor of '
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'CoverArtGrid.')
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def get_info_text(self, item) -> Optional[str]:
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raise NotImplementedError(
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'get_info_text must be implemented by the inheritor of '
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'CoverArtGrid.')
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def get_model_list_future(self, before_download):
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raise NotImplementedError(
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'get_model_list_future must be implemented by the inheritor of '
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'CoverArtGrid.')
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def create_model_from_element(self, el):
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raise NotImplementedError(
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'create_model_from_element must be implemented by the inheritor '
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'of CoverArtGrid.')
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def get_cover_art_filename_future(self, item, before_download) -> Future:
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raise NotImplementedError(
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'get_cover_art_filename_future must be implemented by the '
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'inheritor of CoverArtGrid.')
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# Event Handlers
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# =========================================================================
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def on_child_activated(self, flowbox, child):
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click_top = flowbox == self.grid_top
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self.selected_list_store_index = (
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child.get_index() + (0 if click_top else len(self.list_store_top)))
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self.reflow_grids()
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def on_grid_resize(self, flowbox, rect):
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# 200 + (10 * 2) + (5 * 2)
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# picture + (padding * 2) + (margin * 2)
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self.items_per_row = min((rect.width // 230), 7)
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self.reflow_grids()
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