simplemidi/ui/GtkButtonGrid.py

import math

import gi
from gi.repository import Gdk

gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

def rad(n): return n/360*(2*3.1415)

class ButtonWrapper(Gtk.Button):
    def __init__(self, *args, **kwds):
        super().__init__(*args, **kwds)
        self.connect("clicked", self.on_click)
        self.select()
        self.sel=None
        self.definition=None
        self.color=0
        self.index=0
        self.colors=[(0x20/0xff,0x20/0xff,0x20/0xff), (0x20/0xff,0xE0/0xff,0xE0/0xff)]
        self.is_selected=False
        self._btn_selected=None
        self._btn_unselected=None
        self.show=True
        self.show_all()

    def on_click(self, x):
        if self.is_selected:
            if self._btn_unselected: self._btn_unselected(self.index, self)
        else:
            if self._btn_selected: self._btn_selected(self.index, self)

    def do_draw(self, cr):
        if not self.show: return
        allocation = self.get_allocation()
        fg_color = self.get_style_context().get_color(Gtk.StateFlags.NORMAL)
        cr.set_source_rgba(*self.colors[0]);
        cr.rectangle(4,4,allocation.width-8, allocation.height-8)
        cr.stroke()
        cr.set_source_rgba(*self.colors[self.color]);
        cr.rectangle(6,6,allocation.width-12, allocation.height-12)
        cr.fill()

    def select(self):
        self.is_selected=True
        self.color=1



    def unselect(self):
        self.is_selected=False
        self.color=0

    @staticmethod
    def new(sel, mat, index):
        btn = ButtonWrapper()
        btn.sel=sel
        btn.definition=mat
        btn.index=index
        return btn


class GtkButtonGrid(Gtk.Grid):

    def __init__(self, *args, **kwds):
        super().__init__(*args, **kwds)
        self.width=0
        self.height=0
        self.map=[]
        self.x=0
        self.y=0
        self.sel=None
        self.type=None
        self._btn_selected=None
        self._btn_unselected=None
        self.set_hexpand(True)
        self.set_vexpand(True)
        self.set_row_homogeneous(True)
        self.set_column_homogeneous(True)

    def set_on_select(self, b): self._btn_selected=b
    def set_on_unselect(self, b): self._btn_unselected=b

    def unselect_all(self):
        for k in self.map:
            k.unselect()

    def new(self, x, y, sel, t):
        btn = GtkButtonGrid()
        btn.x=x
        btn.y=y
        btn.sel=sel
        btn.type=type
        return btn

    def update(self):
        self.queue_draw()

    def select(self, i, j=-1):
        if j>=0: i+=j*self.width
        if self.map[i]: self.map[i].select()

    def unselect(self, i, j=-1):
        if j>=0: i+=j*self.width
        if self.map[i]: self.map[i].unselect()

    def set_grid_size(self, x, y):
        for i in range(self.width): self.remove_column(0)
        for i in range(self.height): self.remove_row(0)
        self.width=x
        self.height=y
        self.map=[]
        for i in range(x*y): self.map.append(None)
        for i in range(self.width): self.insert_column(0)
        for i in range(self.height): self.insert_row(0)
        self.show_all()

    def __getitem__(self, item):
        if isinstance(item, (tuple, list)): item=item[0]+item[1]*self.width
        return self.map[item]

    def __setitem__(self, key, value):
        if isinstance(key, (tuple, list)): key=key[0]+key[1]*self.width
        x=key%self.width
        y=math.floor(key/self.width)
        if(value[1]):
            self.map[key]=ButtonWrapper.new(value[0], value[1], value[2])
            self.map[key]._btn_selected=self._btn_selected
            self.map[key]._btn_unselected=self._btn_unselected
            self.attach(self.map[key], x,y,1,1)
        else:
            self.map[key]=ButtonWrapper.new(value[0], value[1], value[2])
            self.map[key].show=False
            self.attach(self.map[key], x,y,1,1)

        return self.map[key]