Merge pull request #70 from FoamyGuy/tab_layout

Tab layout

Author: makermelissa

adafruit_displayio_layout/layouts/page_layout.py

@@ -53,11 +53,11 @@ def __init__(
         self.x = x
         self.y = y
 
-        self._page_content_list = []
+        self.page_content_list = []
         self._cur_showing_index = 0
 
     def add_content(self, page_content, page_name=None):
-        """Add a child to the grid.
+        """Add a child to the page layout.
 
         :param page_content: the content for the page typically a Group
         :param page_name: the name of this page
@@ -72,10 +72,10 @@ def add_content(self, page_content, page_name=None):
             "page_name": page_name,
         }
 
-        if len(self._page_content_list) > 0:
+        if len(self.page_content_list) > 0:
             _page_group.hidden = True
 
-        self._page_content_list.append(sub_view_obj)
+        self.page_content_list.append(sub_view_obj)
         self.append(_page_group)
 
     def _check_args(self, page_name, page_index):
@@ -95,16 +95,16 @@ def _check_args(self, page_name, page_index):
             )
 
         if page_index is not None:
-            if page_index >= len(self._page_content_list):
+            if page_index >= len(self.page_content_list):
                 raise KeyError(
                     "KeyError at index {} in list length {}".format(
-                        page_index, len(self._page_content_list)
+                        page_index, len(self.page_content_list)
                     ),
                 )
 
         if page_name is not None:
             _found = False
-            for page in self._page_content_list:
+            for page in self.page_content_list:
                 if not _found:
                     if page_name == page["page_name"]:
                         _found = True
@@ -125,10 +125,10 @@ def get_page(self, page_name=None, page_index=None):
         self._check_args(page_name, page_index)
 
         if page_index is not None:
-            return self._page_content_list[page_index]
+            return self.page_content_list[page_index]
 
         if page_name is not None:
-            for cell in self._page_content_list:
+            for cell in self.page_content_list:
                 if cell["page_name"] == page_name:
                     return cell
 
@@ -149,7 +149,7 @@ def show_page(self, page_name=None, page_index=None):
 
         self._check_args(page_name, page_index)
 
-        for cur_index, page in enumerate(self._page_content_list):
+        for cur_index, page in enumerate(self.page_content_list):
             if page_name is not None:
                 if page["page_name"] == page_name:
                     self._cur_showing_index = cur_index
@@ -182,7 +182,7 @@ def showing_page_name(self):
         Name of the currently showing page
         :return string: showing_page_name
         """
-        return self._page_content_list[self._cur_showing_index]["page_name"]
+        return self.page_content_list[self._cur_showing_index]["page_name"]
 
     @showing_page_name.setter
     def showing_page_name(self, new_name):
@@ -194,7 +194,7 @@ def showing_page_content(self):
         The content object for the currently showing page
         :return Displayable: showing_page_content
         """
-        return self._page_content_list[self._cur_showing_index]["content"][0]
+        return self.page_content_list[self._cur_showing_index]["content"][0]
 
     def next_page(self, loop=True):
         """
@@ -203,7 +203,7 @@ def next_page(self, loop=True):
         :return: None
         """
 
-        if self._cur_showing_index + 1 < len(self._page_content_list):
+        if self._cur_showing_index + 1 < len(self.page_content_list):
             self.show_page(page_index=self._cur_showing_index + 1)
         else:
             if not loop:
@@ -223,4 +223,4 @@ def previous_page(self, loop=True):
             if not loop:
                 print("No more pages")
             else:
-                self.show_page(page_index=len(self._page_content_list) - 1)
+                self.show_page(page_index=len(self.page_content_list) - 1)

adafruit_displayio_layout/layouts/tab_layout.py

@@ -0,0 +1,288 @@
+# SPDX-FileCopyrightText: 2022 Tim Cocks
+#
+# SPDX-License-Identifier: MIT
+
+"""
+`tab_layout`
+================================================================================
+
+A layout that organizes pages into tabs.
+
+
+* Author(s): Tim Cocks
+
+Implementation Notes
+--------------------
+
+**Hardware:**
+
+**Software and Dependencies:**
+
+* Adafruit CircuitPython firmware for the supported boards:
+  https://github.com/adafruit/circuitpython/releases
+
+"""
+try:
+    from typing import Optional, Union, Tuple
+    from fontio import BuiltinFont
+    from adafruit_bitmap_font.bdf import BDF
+    from adafruit_bitmap_font.pcf import PCF
+except ImportError:
+    pass
+
+import terminalio
+import displayio
+import adafruit_imageload
+from adafruit_display_text.bitmap_label import Label
+from adafruit_imageload.tilegrid_inflator import inflate_tilegrid
+from adafruit_displayio_layout.layouts.page_layout import PageLayout
+
+
+class TabLayout(displayio.Group):
+    """
+    A layout that organizes children into a grid table structure.
+
+    .. warning::
+        Requires CircuitPython version 7.3.0-beta.2 or newer
+
+    :param int x: x location the layout should be placed. Pixel coordinates.
+    :param int y: y location the layout should be placed. Pixel coordinates.
+    :param displayio.Display display: The Display object to show the tab layout on.
+    :param int tab_text_scale: Size of the text shown in the tabs.
+      Whole numbers 1 and greater are valid
+    :param Optional[Union[BuiltinFont, BDF, PCF]] custom_font: A pre-loaded font object to use
+      for the tab labels
+    :param str inactive_tab_spritesheet: Filepath of the spritesheet to show for inactive tabs.
+    :param str showing_tab_spritesheet: Filepath of the spritesheet to show for the active tab.
+    :param Optional[int, tuple[int, int, int]] showing_tab_text_color: Hex or tuple color to use
+      for the active tab label
+    :param Optional[int, tuple[int, int, int]] inactive_tab_text_color: Hex or tuple color to
+      use for inactive tab labels
+    :param Optional[Union[int, tuple[int, int]]] inactive_tab_transparent_indexes: single index
+      or tuple of multiple indexes to be made transparent in the inactive tab sprite palette.
+    :param Optional[Union[int, tuple[int, int]]] showing_tab_transparent_indexes: single index
+      or tuple of multiple indexes to be made transparent in the active tab sprite palette.
+    :param int tab_count: How many tabs to draw in the layout. Positive whole numbers are valid.
+    """
+
+    # pylint: disable=too-many-instance-attributes, too-many-arguments, invalid-name, too-many-branches
+
+    def __init__(
+        self,
+        x: int = 0,
+        y: int = 0,
+        display: Optional[displayio.Display] = None,
+        tab_text_scale: int = 1,
+        custom_font: Optional[Union[BuiltinFont, BDF, PCF]] = terminalio.FONT,
+        inactive_tab_spritesheet: Optional[str] = None,
+        showing_tab_spritesheet: Optional[str] = None,
+        showing_tab_text_color: Optional[Union[int, Tuple[int, int, int]]] = 0x999999,
+        inactive_tab_text_color: Optional[Union[int, Tuple[int, int, int]]] = 0xFFFFF,
+        inactive_tab_transparent_indexes: Optional[Union[int, Tuple[int, int]]] = None,
+        showing_tab_transparent_indexes: Optional[Union[int, Tuple[int, int]]] = None,
+        tab_count: int = None,
+    ):
+
+        if display is None:
+            # pylint: disable=import-outside-toplevel
+            import board
+
+            if hasattr(board, "DISPLAY"):
+                display = board.DISPLAY
+        if inactive_tab_spritesheet is None:
+            raise AttributeError("Must pass active_tab_spritesheet")
+        if showing_tab_spritesheet is None:
+            raise AttributeError("Must pass inactive_tab_spritesheet")
+        if tab_count is None:
+            raise AttributeError("Must pass tab_count")
+
+        super().__init__(x=x, y=y)
+        self.tab_count = tab_count
+        self._active_bmp, self._active_palette = adafruit_imageload.load(
+            showing_tab_spritesheet
+        )
+        self._inactive_bmp, self._inactive_palette = adafruit_imageload.load(
+            inactive_tab_spritesheet
+        )
+
+        if isinstance(showing_tab_transparent_indexes, int):
+            self._active_palette.make_transparent(showing_tab_transparent_indexes)
+        elif isinstance(showing_tab_transparent_indexes, tuple):
+            for index in showing_tab_transparent_indexes:
+                self._active_palette.make_transparent(index)
+        else:
+            raise AttributeError("active_tab_transparent_indexes must be int or tuple")
+
+        if isinstance(inactive_tab_transparent_indexes, int):
+            self._inactive_palette.make_transparent(inactive_tab_transparent_indexes)
+        elif isinstance(inactive_tab_transparent_indexes, tuple):
+            for index in inactive_tab_transparent_indexes:
+                self._inactive_palette.make_transparent(index)
+        else:
+            raise AttributeError(
+                "inactive_tab_transparent_indexes must be int or tuple"
+            )
+
+        self.tab_height = self._active_bmp.height
+        self.display = display
+        self.active_tab_text_color = showing_tab_text_color
+        self.inactive_tab_text_color = inactive_tab_text_color
+        self.custom_font = custom_font
+        self.tab_text_scale = tab_text_scale
+        self.tab_group = displayio.Group()
+        self.tab_dict = {}
+        self.page_layout = PageLayout(x=x, y=y + self.tab_height)
+
+        self.append(self.tab_group)
+        self.append(self.page_layout)
+
+    def _draw_tabs(self):
+        for i, page_dict in enumerate(self.page_layout.page_content_list):
+            if i not in self.tab_dict:
+                print(f"creating tab {i}")
+                _new_tab_group = displayio.Group()
+                _tab_tilegrid = inflate_tilegrid(
+                    bmp_obj=self._inactive_bmp,
+                    bmp_palette=self._inactive_palette,
+                    target_size=(
+                        (self.display.width // self.tab_count)
+                        // (self._active_bmp.width // 3),
+                        3,
+                    ),
+                )
+
+                _tab_tilegrid.x = (self.display.width // self.tab_count) * i
+                _new_tab_group.append(_tab_tilegrid)
+
+                _tab_label = Label(
+                    self.custom_font,
+                    text=page_dict["page_name"],
+                    color=self.inactive_tab_text_color,
+                    scale=self.tab_text_scale,
+                )
+
+                _tab_label.anchor_point = (0.5, 0.5)
+                _tab_label.anchored_position = (
+                    _tab_tilegrid.x
+                    + ((_tab_tilegrid.width * _tab_tilegrid.tile_width) // 2),
+                    (_tab_tilegrid.height * _tab_tilegrid.tile_height) // 2,
+                )
+                _new_tab_group.append(_tab_label)
+
+                if i == self.page_layout.showing_page_index:
+                    try:
+                        _tab_tilegrid.bitmap = self._active_bmp
+                    except AttributeError as e:
+                        print(e)
+                        raise (
+                            AttributeError(
+                                "TabLayout requires CircuitPython version 7.3.0-beta.2 or newer."
+                            )
+                        ) from e
+                    _tab_tilegrid.pixel_shader = self._active_palette
+                    _tab_label.color = self.active_tab_text_color
+                self.tab_dict[i] = _new_tab_group
+                self.tab_group.append(_new_tab_group)
+
+    def _update_active_tab(self):
+        for i in range(len(self.page_layout)):
+            if i == self.page_layout.showing_page_index:
+                self.tab_group[i][0].bitmap = self._active_bmp
+                self.tab_group[i][0].pixel_shader = self._active_palette
+                self.tab_group[i][1].color = self.active_tab_text_color
+            else:
+                self.tab_group[i][0].bitmap = self._inactive_bmp
+                self.tab_group[i][0].pixel_shader = self._inactive_palette
+                self.tab_group[i][1].color = self.inactive_tab_text_color
+
+    def add_content(self, tab_content, tab_name):
+        """Add a child to the tab layout.
+
+        :param tab_content: the content for the tab typically a Group
+        :param tab_name: the name of this tab, will be shown inside the tab
+
+        :return: None"""
+        self.page_layout.add_content(tab_content, tab_name)
+        self._draw_tabs()
+
+    def show_page(self, page_name=None, page_index=None):
+        """
+        Show the specified page, and hide all other pages.
+
+        :param string page_name: The name of a page to show
+        :param int page_index: The index of a page to show
+        :return: None
+        """
+
+        self.page_layout.show_page(page_name=page_name, page_index=page_index)
+        self._update_active_tab()
+
+    @property
+    def showing_page_index(self):
+        """
+        Index of the currently showing page
+        :return int: showing_page_index
+        """
+        return self.page_layout.showing_page_index
+
+    @showing_page_index.setter
+    def showing_page_index(self, new_index):
+        if self.showing_page_index != new_index:
+            self.show_page(page_index=new_index)
+
+    @property
+    def showing_page_name(self):
+        """
+        Name of the currently showing page
+        :return string: showing_page_name
+        """
+        return self.page_layout.showing_page_name
+
+    @showing_page_name.setter
+    def showing_page_name(self, new_name):
+        self.show_page(page_name=new_name)
+
+    @property
+    def showing_page_content(self):
+        """
+        The content object for the currently showing page
+        :return Displayable: showing_page_content
+        """
+        return self.page_layout.showing_page_content
+
+    def next_page(self, loop=True):
+        """
+        Hide the current page and show the next one in the list by index
+        :param bool loop: whether to loop from the last page back to the first
+        :return: None
+        """
+
+        self.page_layout.next_page(loop=loop)
+        self._update_active_tab()
+
+    def previous_page(self, loop=True):
+        """
+        Hide the current page and show the previous one in the list by index
+        :param bool loop: whether to loop from the first page to the last one
+        :return: None
+        """
+        self.page_layout.previous_page(loop=loop)
+        self._update_active_tab()
+
+    def handle_touch_events(self, touch_event):
+        """
+        Check if the touch event is on the tabs and if so change to the touched tab.
+
+        :param tuple touch_event: tuple containing x and y coordinates of the
+          touch event in indexes 0 and 1.
+        :return: None
+        """
+
+        if touch_event:
+            if 0 <= touch_event[1] <= self.tab_height:
+
+                touched_tab_index = touch_event[0] // (
+                    self.display.width // self.tab_count
+                )
+                print(f"{touch_event[0]} - {touched_tab_index}")
+                self.showing_page_index = touched_tab_index