New release v5.2 - New objects, new features and more

New objects

• Image button
• Calendar
• Arc
• Preloader

Draw and rendering

• Line draw algorithm is improved to support perpendicular line endings
• Arc drawing
• Shadow drawing improvements
• Custom VDB write function can be registered in the display driver to support non-standard color formats. This the VDB content can be directly flushed to the display.
• RGB565 swap to swap the two bytes of RGB565 colors. It makes possible to simply send the pixel’s data via a 8-bit serial interface (e.g. SPI). It can be enabled in lv_conf.h by setting LV_COLOR_16_SWAP.
• VDB address can be set in runtime with lv_vdb_set_adr(). Useful if you want to use DMA in the disp_flush function but the VDB need to be allocated in a specific way.
• New image formats supporting Indexed and Grayscale formats too to save memory
• Image decoder interface to add support to any image format like PNG
• Dithering support in Online image converter

New object features

• lv_obj opa scale attribute added to scale the current opacity of an object and its children (useful to fade in/out a group of objects)
• lv_label LV_LABEL_ALIGN_RIGHT added to enable right alignmenet of texts.
• lv_label LV_LABEL_LONG_CROP long mode to simply crop the text out of the label’s size.
• lv_btn Ink effect feature added to play an animation effect when a button is clicked and released. Can be enabled with lv_btn_set_ink_in_time(), lv_btn_set_ink_wait_time(), lv_btn_set_ink_out_time() and LV_BTN_INK_EFFECT` need to be enabled in lv_conf.h.
• lv_page, lv_win, lv_ta scrolling is added on LV_GROUP_KEY_UP/DOWN/LEFT/RIGHT
• lv_page temporal scrollbar hide option is added (LV_SB_MODE_HIDE)
• lv_ta max_length and accepted_chars attributes are added.d to be enabled in lv_conf.h.
• lv_ta action can be added with lv_ta_set_action()

Other new features:

• SYMBOL_DUMMY: If added before string then lv_img will display the text. This way where icons need and an image a text can be set as well.
• Monospace font support (set the width in the Online converter)
• LV_FONT_CUSTOM define added in lv_conf.h where you can enumerate you custom fonts to make them global
• LV_CONF_INCLUDE_SIMPLE: define it as a compiler symbol to include lv_conf.h like include "lv_conf.h" instead of using its relative path.
• Click focus: you can enable focusing on an object in a group when it is clicked by a pointer an input device (mouse or touchpad)
• Add LV_GROUP_KEY_DEL
• Log system added to print useful debug info
• Uniscii monospace font is added as built-in font
• Edit/Navigate mode can be enabled for objects in a group. Useful for encoder based navigation.
• Adding a new character encoding interface (other than the built-in UTF-8) made easy
• LV_INDEV_TYPE_ENCODER: Encoder input device type (Left/Right/Push)
• Opportunity to use your existing tick handler instead of lv_tick_inc. See lv_conf_templ.h
• Themes can be changed in runtime (set LV_THEME_LIVE_UPDATE in lv_conf.h)
• A new theme called: Nemo
• lv_fs_trunc and lv_fs_rename added