[rust] add example for issue #1753

rust/examples/issue-1753.rs

@@ -0,0 +1,47 @@
+use libnotcurses_sys::*;
+
+fn main() -> NcResult<()> {
+    let mut nc = Notcurses::new()?;
+
+    // NOT USING STDPLANE movement is relative
+
+    let pred = NcPlane::new(&mut nc, 0, 0, 10, 20)?;
+    pred.set_base("·", 0, NcChannelPair::with_rgb(0xaadd2b, 0x882222))?;
+    prsleep![pred, 0, 300];
+
+    for _ in 0..8 {
+        pred.move_yx(1, 1)?;
+        // pred.move_rel(1, 1)?; // this would move in geometric proportion
+        prsleep![pred, 0, 100];
+    }
+    for _ in 0..8 {
+        pred.move_yx(-1, -1)?;
+        // pred.move_rel(-1, -1)?; //
+        prsleep![pred, 0, 100];
+    }
+    sleep![1];
+    pred.destroy()?;
+
+
+    // USING STDPLANE movement is absolute!
+
+    let pgreen = NcPlane::new_bound(nc.stdplane(), 0, 0, 10, 20)?;
+    pgreen.set_base("s", 0, NcChannelPair::with_rgb(0x224411, 0x229922))?;
+    rsleep![&mut nc, 0, 800];
+
+    for _ in 0..8 {
+        pgreen.move_yx(1, 1)?;
+        // pgreen.move_rel(1, 1)?; // this works like move_yx on the red plane
+        rsleep![&mut nc, 0, 100];
+    }
+    for _ in 0..8 {
+        pgreen.move_yx(-1, -1)?;
+        // pgreen.move_rel(-1, -1)?; //
+        rsleep![&mut nc, 0, 100];
+    }
+    sleep![2];
+    pgreen.destroy()?;
+
+    nc.stop()?;
+    Ok(())
+}