Add UiButton class

src/ui/UiButton.py

@@ -1,5 +1,41 @@
-import src.ui.UiElement as UiElement
+import pygame
+
+from src.ui.UiElement import UiElement
 
 
 class UiButton(UiElement):
-    pass
+
+    def __init__(self, rect: pygame.Rect, text="Click", color=(125, 125, 125)):
+        super().__init__(rect)
+        self.text = text
+        self.color = color
+
+        self.DEFAULTIMAGE = 0
+        self.CLICKINGIMAGE = 1
+
+        self._images = [
+            pygame.Surface((rect.width, rect.height)),
+            pygame.Surface((rect.width, rect.height)),
+        ]
+
+        # fill images with color - red, gree, blue
+        self._images[0].fill((255, 0, 0))
+        self._images[1].fill((0, 255, 0))
+
+        self.beingClicked = False
+
+        self.image = self._images[0]
+
+    def eventHandler(self, event):
+
+        # change selected color if rectange clicked
+        if event.type == pygame.MOUSEBUTTONDOWN:  # is some button clicked
+            if event.button == 1:  # is left button clicked
+                if self.rect.collidepoint(event.pos):  # is mouse over button
+
+                    self.image = self._images[self.CLICKINGIMAGE]
+                    self.beingClicked = True
+        elif event.type == pygame.MOUSEBUTTONUP and self.beingClicked:
+            if event.button == 1:
+                self.beingClicked = False
+                self.image = self._images[self.DEFAULTIMAGE]