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mob_new
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0.1.0
Project generator for the Mob mobile framework
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priv/templates/mob.new/lib/app_name/camera_screen.ex.eex
defmodule <%= module_name %>.CameraScreen do
use Mob.Screen
def mount(_params, _session, socket) do
socket = Mob.Permissions.request(socket, :camera)
{:ok, Mob.Socket.assign(socket, previewing: false, status: "requesting permission…", last_capture: nil)}
end
def render(assigns) do
tap_capture = {self(), :capture_photo}
~MOB"""
<Column background={:background} fill_width={true} fill_height={true}>
<Text text="Camera" text_size={:lg} text_color={:on_surface} padding={:space_md} />
<Text text={"Status: #{assigns.status}"} text_size={:sm} text_color={:primary} padding={4} />
{preview_or_placeholder(assigns)}
<Row fill_width={true} padding={:space_md}>
{preview_toggle(assigns.previewing)}
<Spacer size={12} />
<Button text="Capture Photo" background={:primary} text_color={:on_primary} padding={:space_md} weight={1} on_tap={tap_capture} />
</Row>
</Column>
"""
end
defp preview_or_placeholder(%{previewing: true}) do
~MOB(<CameraPreview facing={:back} weight={1} />)
end
defp preview_or_placeholder(_) do
~MOB(<Column background={:surface} weight={1} fill_width={true}><Text text="Preview off" text_size={:sm} text_color={:muted} padding={:space_md} /></Column>)
end
defp preview_toggle(true) do
tap = {self(), :stop_preview}
~MOB(<Button text="Stop Preview" background={:surface} text_color={:on_surface} padding={:space_md} weight={1} on_tap={tap} />)
end
defp preview_toggle(false) do
tap = {self(), :start_preview}
~MOB(<Button text="Start Preview" background={:surface} text_color={:on_surface} padding={:space_md} weight={1} on_tap={tap} />)
end
def handle_info({:permission, :camera, :granted}, socket) do
{:noreply, Mob.Socket.assign(socket, status: "idle")}
end
def handle_info({:permission, :camera, :denied}, socket) do
{:noreply, Mob.Socket.assign(socket, status: "camera permission denied")}
end
def handle_info({:tap, :start_preview}, socket) do
socket = Mob.Camera.start_preview(socket, facing: :back)
{:noreply, Mob.Socket.assign(socket, previewing: true, status: "preview starting…")}
end
def handle_info({:tap, :stop_preview}, socket) do
socket = Mob.Camera.stop_preview(socket)
{:noreply, Mob.Socket.assign(socket, previewing: false, status: "preview stopped")}
end
def handle_info({:tap, :capture_photo}, socket) do
socket = Mob.Camera.capture_photo(socket, quality: :high)
{:noreply, Mob.Socket.assign(socket, status: "camera opening…")}
end
def handle_info({:camera, :photo, %{path: path}}, socket) do
{:noreply, Mob.Socket.assign(socket, last_capture: path, status: "photo: #{Path.basename(path)}")}
end
def handle_info({:camera, :cancelled}, socket) do
{:noreply, Mob.Socket.assign(socket, status: "cancelled")}
end
def handle_info({:camera, :error, reason}, socket) do
{:noreply, Mob.Socket.assign(socket, status: "error: #{inspect(reason)}")}
end
def handle_info(_msg, socket), do: {:noreply, socket}
def terminate(_reason, socket) do
if socket.assigns.previewing, do: Mob.Camera.stop_preview(socket)
:ok
end
end