Update LVGL to v9.1.0

4 files changed, 170 insertions, 0 deletions

diff --git a/lib/lvgl/examples/widgets/button/index.rst b/lib/lvgl/examples/widgets/button/index.rst
new file mode 100644
index 00000000..c8b9cda4
--- /dev/null
+++ b/lib/lvgl/examples/widgets/button/index.rst
@@ -0,0 +1,20 @@
+
+Simple Buttons
+--------------
+
+.. lv_example:: widgets/button/lv_example_button_1
+  :language: c
+
+
+Styling buttons
+---------------
+
+.. lv_example:: widgets/button/lv_example_button_2
+  :language: c
+
+Gummy button
+------------
+
+.. lv_example:: widgets/button/lv_example_button_3
+  :language: c
+
diff --git a/lib/lvgl/examples/widgets/button/lv_example_button_1.c b/lib/lvgl/examples/widgets/button/lv_example_button_1.c
new file mode 100644
index 00000000..eae9c9da
--- /dev/null
+++ b/lib/lvgl/examples/widgets/button/lv_example_button_1.c
@@ -0,0 +1,40 @@
+#include "../../lv_examples.h"
+#if LV_USE_BUTTON && LV_BUILD_EXAMPLES
+
+static void event_handler(lv_event_t * e)
+{
+    lv_event_code_t code = lv_event_get_code(e);
+
+    if(code == LV_EVENT_CLICKED) {
+        LV_LOG_USER("Clicked");
+    }
+    else if(code == LV_EVENT_VALUE_CHANGED) {
+        LV_LOG_USER("Toggled");
+    }
+}
+
+void lv_example_button_1(void)
+{
+    lv_obj_t * label;
+
+    lv_obj_t * btn1 = lv_button_create(lv_screen_active());
+    lv_obj_add_event_cb(btn1, event_handler, LV_EVENT_ALL, NULL);
+    lv_obj_align(btn1, LV_ALIGN_CENTER, 0, -40);
+    lv_obj_remove_flag(btn1, LV_OBJ_FLAG_PRESS_LOCK);
+
+    label = lv_label_create(btn1);
+    lv_label_set_text(label, "Button");
+    lv_obj_center(label);
+
+    lv_obj_t * btn2 = lv_button_create(lv_screen_active());
+    lv_obj_add_event_cb(btn2, event_handler, LV_EVENT_ALL, NULL);
+    lv_obj_align(btn2, LV_ALIGN_CENTER, 0, 40);
+    lv_obj_add_flag(btn2, LV_OBJ_FLAG_CHECKABLE);
+    lv_obj_set_height(btn2, LV_SIZE_CONTENT);
+
+    label = lv_label_create(btn2);
+    lv_label_set_text(label, "Toggle");
+    lv_obj_center(label);
+
+}
+#endif
diff --git a/lib/lvgl/examples/widgets/button/lv_example_button_2.c b/lib/lvgl/examples/widgets/button/lv_example_button_2.c
new file mode 100644
index 00000000..441901e5
--- /dev/null
+++ b/lib/lvgl/examples/widgets/button/lv_example_button_2.c
@@ -0,0 +1,65 @@
+#include "../../lv_examples.h"
+#if LV_USE_BUTTON && LV_BUILD_EXAMPLES
+
+/**
+ * Style a button from scratch
+ */
+void lv_example_button_2(void)
+{
+    /*Init the style for the default state*/
+    static lv_style_t style;
+    lv_style_init(&style);
+
+    lv_style_set_radius(&style, 3);
+
+    lv_style_set_bg_opa(&style, LV_OPA_100);
+    lv_style_set_bg_color(&style, lv_palette_main(LV_PALETTE_BLUE));
+    lv_style_set_bg_grad_color(&style, lv_palette_darken(LV_PALETTE_BLUE, 2));
+    lv_style_set_bg_grad_dir(&style, LV_GRAD_DIR_VER);
+
+    lv_style_set_border_opa(&style, LV_OPA_40);
+    lv_style_set_border_width(&style, 2);
+    lv_style_set_border_color(&style, lv_palette_main(LV_PALETTE_GREY));
+
+    lv_style_set_shadow_width(&style, 8);
+    lv_style_set_shadow_color(&style, lv_palette_main(LV_PALETTE_GREY));
+    lv_style_set_shadow_offset_y(&style, 8);
+
+    lv_style_set_outline_opa(&style, LV_OPA_COVER);
+    lv_style_set_outline_color(&style, lv_palette_main(LV_PALETTE_BLUE));
+
+    lv_style_set_text_color(&style, lv_color_white());
+    lv_style_set_pad_all(&style, 10);
+
+    /*Init the pressed style*/
+    static lv_style_t style_pr;
+    lv_style_init(&style_pr);
+
+    /*Add a large outline when pressed*/
+    lv_style_set_outline_width(&style_pr, 30);
+    lv_style_set_outline_opa(&style_pr, LV_OPA_TRANSP);
+
+    lv_style_set_translate_y(&style_pr, 5);
+    lv_style_set_shadow_offset_y(&style_pr, 3);
+    lv_style_set_bg_color(&style_pr, lv_palette_darken(LV_PALETTE_BLUE, 2));
+    lv_style_set_bg_grad_color(&style_pr, lv_palette_darken(LV_PALETTE_BLUE, 4));
+
+    /*Add a transition to the outline*/
+    static lv_style_transition_dsc_t trans;
+    static lv_style_prop_t props[] = {LV_STYLE_OUTLINE_WIDTH, LV_STYLE_OUTLINE_OPA, 0};
+    lv_style_transition_dsc_init(&trans, props, lv_anim_path_linear, 300, 0, NULL);
+
+    lv_style_set_transition(&style_pr, &trans);
+
+    lv_obj_t * btn1 = lv_button_create(lv_screen_active());
+    lv_obj_remove_style_all(btn1);                          /*Remove the style coming from the theme*/
+    lv_obj_add_style(btn1, &style, 0);
+    lv_obj_add_style(btn1, &style_pr, LV_STATE_PRESSED);
+    lv_obj_set_size(btn1, LV_SIZE_CONTENT, LV_SIZE_CONTENT);
+    lv_obj_center(btn1);
+
+    lv_obj_t * label = lv_label_create(btn1);
+    lv_label_set_text(label, "Button");
+    lv_obj_center(label);
+}
+#endif
diff --git a/lib/lvgl/examples/widgets/button/lv_example_button_3.c b/lib/lvgl/examples/widgets/button/lv_example_button_3.c
new file mode 100644
index 00000000..d6803856
--- /dev/null
+++ b/lib/lvgl/examples/widgets/button/lv_example_button_3.c
@@ -0,0 +1,45 @@
+#include "../../lv_examples.h"
+#if LV_BUILD_EXAMPLES && LV_USE_BUTTON
+
+/**
+ * Create a style transition on a button to act like a gum when clicked
+ */
+void lv_example_button_3(void)
+{
+    /*Properties to transition*/
+    static lv_style_prop_t props[] = {
+        LV_STYLE_TRANSFORM_WIDTH, LV_STYLE_TRANSFORM_HEIGHT, LV_STYLE_TEXT_LETTER_SPACE, 0
+    };
+
+    /*Transition descriptor when going back to the default state.
+     *Add some delay to be sure the press transition is visible even if the press was very short*/
+    static lv_style_transition_dsc_t transition_dsc_def;
+    lv_style_transition_dsc_init(&transition_dsc_def, props, lv_anim_path_overshoot, 250, 100, NULL);
+
+    /*Transition descriptor when going to pressed state.
+     *No delay, go to presses state immediately*/
+    static lv_style_transition_dsc_t transition_dsc_pr;
+    lv_style_transition_dsc_init(&transition_dsc_pr, props, lv_anim_path_ease_in_out, 250, 0, NULL);
+
+    /*Add only the new transition to he default state*/
+    static lv_style_t style_def;
+    lv_style_init(&style_def);
+    lv_style_set_transition(&style_def, &transition_dsc_def);
+
+    /*Add the transition and some transformation to the presses state.*/
+    static lv_style_t style_pr;
+    lv_style_init(&style_pr);
+    lv_style_set_transform_width(&style_pr, 10);
+    lv_style_set_transform_height(&style_pr, -10);
+    lv_style_set_text_letter_space(&style_pr, 10);
+    lv_style_set_transition(&style_pr, &transition_dsc_pr);
+
+    lv_obj_t * btn1 = lv_button_create(lv_screen_active());
+    lv_obj_align(btn1, LV_ALIGN_CENTER, 0, -80);
+    lv_obj_add_style(btn1, &style_pr, LV_STATE_PRESSED);
+    lv_obj_add_style(btn1, &style_def, 0);
+
+    lv_obj_t * label = lv_label_create(btn1);
+    lv_label_set_text(label, "Gum");
+}
+#endif