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LVGL v7.4.0 Released

LVGL v7.4.0 introduces runtime font loading, style caching for improved performance, and enhanced arc controls with click-to-set value.

Gabor Kiss-VamosiGabor Kiss-Vamosi1 min read

The main new features of v7.4.0 are runtime font loading, style caching, and arc knob with value setting by click.

New Features#

  • Runtime Font Loading: Add lv_font_load() function to load a lv_font_t object from a binary font file
  • Font Memory Management: Add lv_font_free() function to free memory allocated by lv_font_load()
  • Style Caching: Reduces access time of properties with default values for improved performance
  • Arc Click-to-Set: Arc widget now supports setting value by clicking directly on the arc
  • Arc Knob Part: Add LV_ARC_PART_KNOB to arc widgets, similar to the slider widget implementation
  • Enhanced Gesture Handling: Gestures are now sent even if the object was dragged. Users can check dragging state with lv_indev_is_dragging(lv_indev_act()) in the event function

Bugfixes#

  • Fix color bleeding on border drawing
  • Fix using LV_SCROLLBAR_UNHIDE after LV_SCROLLBAR_ON
  • Fix cropping of last column/row when an image is zoomed
  • Fix zooming and rotating mosaic images
  • Fix deleting tabview with LEFT/RIGHT tab position
  • Fix btnmatrix to not send event when CLICK_TRIG = true and the cursor slid from a pressed button
  • Fix roller width when selected text is larger than the normal text

About the author

Gabor Kiss-Vamosi
Gabor Kiss-Vamosi

CEO & Creator of LVGL

Founder and lead developer of LVGL, the open-source embedded graphics library used in millions of devices worldwide.

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