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docs/examples/styles/scrollbar_size.py

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+from textual.app import App
+from textual import layout
+from textual.widgets import Static
+
+TEXT = """I must not fear.
+Fear is the mind-killer.
+Fear is the little-death that brings total obliteration.
+I will face my fear.
+I will permit it to pass over me and through me.
+And when it has gone past, I will turn the inner eye to see its path.
+Where the fear has gone there will be nothing. Only I will remain.
+"""
+
+
+class ScrollbarApp(App):
+    CSS = """
+    Screen {
+        background: white;
+        color: blue 80%;
+        layout: horizontal;
+    }
+    
+    Static {
+        padding: 1 2;
+        width: 200;
+    }
+
+    .panel {
+        scrollbar-size: 10 4;
+        padding: 1 2;        
+    }     
+    """
+
+    def compose(self):
+        yield layout.Vertical(Static(TEXT * 5), classes="panel")
+
+
+app = ScrollbarApp()

docs/examples/styles/scrollbars.py

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+from textual.app import App
+from textual import layout
+from textual.widgets import Static
+
+TEXT = """I must not fear.
+Fear is the mind-killer.
+Fear is the little-death that brings total obliteration.
+I will face my fear.
+I will permit it to pass over me and through me.
+And when it has gone past, I will turn the inner eye to see its path.
+Where the fear has gone there will be nothing. Only I will remain.
+"""
+
+
+class ScrollbarApp(App):
+    CSS = """
+
+    Screen {
+        background: #212121;
+        color: white 80%;
+        layout: horizontal;
+    }
+    
+    Static {
+        padding: 1 2;
+    }
+
+    .panel1 {
+        width: 1fr;
+        scrollbar-color: green;
+        scrollbar-background: #bbb;
+        padding: 1 2;        
+    } 
+
+    .panel2 {
+        width: 1fr;
+        scrollbar-color: yellow;
+        scrollbar-background: purple;
+        padding: 1 2;
+    }   
+    
+    """
+
+    def compose(self):
+        yield layout.Vertical(Static(TEXT * 5), classes="panel1")
+        yield layout.Vertical(Static(TEXT * 5), classes="panel2")
+
+
+app = ScrollbarApp()