MiniPhotoView.py

# coding: utf-8

import ui, photos, console


class MyPictureView(ui.View):
    def __init__(self, width, height):
        self.frame = (0, 0, width, height)
        self.iwidth = 200.0
        self.iheight = 200.0
        framesize = 10
        iw = self.iwidth - 2 * framesize
        ih = self.iheight - 2 * framesize

        ratio = ih / iw
        self.img = []
        ass = photos.get_assets(media_type='image')
        self.imgcount = min(len(ass), 100)
        console.hud_alert(
            "Please wait while {} photos are loading...".format(self.imgcount)
        )
        for i in range(self.imgcount):
            img = ui.Image.from_data(ass[i].get_image_data().read())
            w, h = img.size
            rat = h / w
            x_ratio = 1.0
            y_ratio = 1.0
            x = framesize
            y = framesize

            if ratio < 1:  # landscape canvas
                if rat <= ratio:  # full width
                    y = ((ih - iw * rat) / 2) + framesize
                    y_ratio = iw * rat / ih
                else:  # full height
                    x = ((iw - ih / rat) / 2) + framesize
                    x_ratio = ih / rat / iw
            elif ratio > 1:  # portrait canvas
                if rat > ratio:  # full height
                    x = ((iw - ih / rat) / 2) + framesize
                    x_ratio = ih / rat / iw
                else:  # full width
                    y = ((ih - iw * rat) / 2) + framesize
                    y_ratio = iw * rat / ih
            else:  # cubic canvas
                if rat < 1:  # full width
                    y = ((ih - iw * rat) / 2) + framesize
                    y_ratio = iw * rat / ih
                elif rat > 1:  # full height
                    x = ((iw - ih / rat) / 2) + framesize
                    x_ratio = ih / rat / iw
                else:  # cubic
                    pass  # x_ratio = y_ratio = 1.0
            with ui.ImageContext(self.iwidth, self.iheight) as ctx:
                img.draw(x, y, iw * x_ratio, ih * y_ratio)
                self.img.append(ctx.get_image())

    def draw(self):
        i = 0
        if self.imgcount < 100:
            endrow = self.imgcount // 10 + 1
        else:
            endrow = 10
        for row in range(endrow):
            for column in range(10):
                if i == self.imgcount:
                    break
                if self.img[i]:
                    x = column * self.iwidth
                    y = row * self.iheight
                    self.img[i].draw(x, y, self.iwidth, self.iheight)
                i += 1


class MiniPhotoView(ui.View):
    def __init__(self):
        self.view = ui.View(background_color="lightyellow")
        self.view.name = "MiniPhotoView"
        scrollview1 = ui.ScrollView()
        scrollview1.name = "scrollview1"
        scrollview1.flex = "WH"
        scrollview1.content_size = (2000, 2000)
        self.view.add_subview(scrollview1)
        self.view.present("full_screen")
        self.sv1 = self.view["scrollview1"]
        width, height = self.sv1.content_size
        self.sv1.add_subview(MyPictureView(width, height))


if photos.get_count():
    MiniPhotoView()
else:
    print("Sorry no access or no pictures.")