From 73de6a2e94378450ff7ceb13d0919ac085fd9925 Mon Sep 17 00:00:00 2001
From: Uli Raich <uli.raich@gmail.com>
Date: Tue, 8 Aug 2023 10:46:57 +0200
Subject: [PATCH] added Python version of lv_example_tiny_ttf_3 (#4437)

---
 .../libs/tiny_ttf/lv_example_tiny_ttf_3.py    | 65 +++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 examples/libs/tiny_ttf/lv_example_tiny_ttf_3.py

diff --git a/examples/libs/tiny_ttf/lv_example_tiny_ttf_3.py b/examples/libs/tiny_ttf/lv_example_tiny_ttf_3.py
new file mode 100644
index 000000000..2691956bf
--- /dev/null
+++ b/examples/libs/tiny_ttf/lv_example_tiny_ttf_3.py
@@ -0,0 +1,65 @@
+from ubuntu_font import ubuntu_font
+
+DISPLAY_TEXT = "Hello World!"
+MSG_NEW_SIZE = 1
+
+#
+# Change font size with Tiny_TTF
+#
+
+lsize = 25
+
+# Define the object that will be sent as msg payload
+class NewValue:
+    def __init__(self, value):
+        self.value = value
+    def __repr__(self):
+        return f"{self.value} %"
+    
+def slider_event_cb(e,label):
+
+    slider = e.get_target_obj()
+    lsize = slider.get_value()
+    label.set_text("{:d}".format(lsize))
+    lv.msg_send(MSG_NEW_SIZE, NewValue(lsize))
+
+
+def label_event_cb(e,font):
+
+    label = e.get_target_obj()
+    m = e.get_msg()
+    payload  = m.get_payload()
+    v = payload.__cast__()
+    lv.tiny_ttf_set_size(font, v.value)
+    label.set_text(DISPLAY_TEXT)
+
+# Create style with the new font
+style = lv.style_t()
+style.init()
+font = lv.tiny_ttf_create_data(ubuntu_font, len(ubuntu_font),lsize)
+style.set_text_font(font)
+style.set_text_align(lv.TEXT_ALIGN.CENTER)
+
+slider = lv.slider(lv.scr_act())
+slider.center()
+slider.set_range(5, 50)
+slider.set_value(lsize, lv.ANIM.OFF)
+slider.align(lv.ALIGN.BOTTOM_MID, 0, -50)
+
+slider_label = lv.label(lv.scr_act())
+slider_label.set_text("{:d}".format(lsize))
+slider_label.align_to(slider, lv.ALIGN.OUT_BOTTOM_MID, 0, 10)
+
+slider.add_event(lambda e: slider_event_cb(e,slider_label), lv.EVENT.VALUE_CHANGED, None)
+
+# Create a label with the new style
+label = lv.label(lv.scr_act())
+label.add_style(style, 0)
+label.add_event(lambda e: label_event_cb(e,font), lv.EVENT.MSG_RECEIVED, None)
+label.set_size(lv.SIZE_CONTENT, lv.SIZE_CONTENT)
+label.center()
+
+lv.msg_subscribe_obj(MSG_NEW_SIZE, label, None)
+lv.msg_send(MSG_NEW_SIZE, NewValue(lsize))
+
+