src/main.rs

@@ -7,12 +7,20 @@ fn main() {
 
     let window = conn.generate_id();
 
+    let width = screen.width_in_pixels();
+    let height = screen.height_in_pixels();
+
+    println!("width {} height {}", width, height);
+
     let values = [
         // ?RGB. First 4 bytes appear to do nothing
         (xcb::CW_BACK_PIXEL, 0x00_00_00_00),
         (
             xcb::CW_EVENT_MASK,
-            xcb::EVENT_MASK_EXPOSURE | xcb::EVENT_MASK_KEY_PRESS, // we'll need this later
+            xcb::EVENT_MASK_EXPOSURE
+                | xcb::EVENT_MASK_KEY_PRESS // we'll need this later
+                // | xcb::EVENT_MASK_BUTTON_PRESS
+                // | xcb::EVENT_MASK_BUTTON_RELEASE,
         ),
         (xcb::CW_OVERRIDE_REDIRECT, 1 as u32), // Don't be window managed
     ];
@@ -46,80 +54,44 @@ fn main() {
         title.as_bytes(),
     );
 
-    let font = conn.generate_id();
-    xcb::open_font(&conn, font, "cursor");
-
-    // TODO: create cursor with a Pixmap
-    // https://stackoverflow.com/questions/40578969/how-to-create-a-cursor-in-x11-from-raw-data-c
-    let cursor = conn.generate_id();
-    xcb::create_glyph_cursor(&conn, cursor, font, font, 0, 30, 0, 0, 0, 0, 0, 0);
-
     xcb::grab_pointer(
         &conn,
         true,
         screen.root(),
-        (xcb::EVENT_MASK_BUTTON_RELEASE
-            | xcb::EVENT_MASK_BUTTON_PRESS
-            | xcb::EVENT_MASK_BUTTON_MOTION) as u16,
+        (xcb::EVENT_MASK_BUTTON_RELEASE | xcb::EVENT_MASK_BUTTON_PRESS) as u16,
         xcb::GRAB_MODE_ASYNC as u8,
         xcb::GRAB_MODE_ASYNC as u8,
         xcb::NONE,
-        cursor,
+        xcb::NONE,
         xcb::CURRENT_TIME,
     ).get_reply()
     .unwrap();
 
     conn.flush();
 
-    // TODO formalise the fact that motion comes after press?
-    let mut start_x = 0;
-    let mut start_y = 0;
-
-    let mut x = 0;
-    let mut y = 0;
-
     loop {
         let ev = conn.wait_for_event().unwrap();
         match ev.response_type() {
             xcb::BUTTON_PRESS => {
                 let button_press: &xcb::ButtonPressEvent = unsafe { xcb::cast_event(&ev) };
-
-                if button_press.detail() == 3 {
-                    println!("Exiting due to right click");
-                    return;
-                }
-
-                start_x = button_press.event_x();
-                start_y = button_press.event_y();
-
-                // For the case where there is no motion
-                x = start_x;
-                y = start_y;
-            }
-            xcb::KEY_PRESS => {
-                println!("Exiting due to key press");
-                return;
-            }
-            xcb::MOTION_NOTIFY => {
-                let motion: &xcb::MotionNotifyEvent = unsafe { xcb::cast_event(&ev) };
-                x = motion.event_x();
-                y = motion.event_y();
-                // TODO draw rectangles (and guides)
+                println!(
+                    "Mouse press: x={}, y={}",
+                    button_press.event_x(),
+                    button_press.event_y()
+                );
             }
             xcb::BUTTON_RELEASE => {
-                let motion: &xcb::ButtonReleaseEvent = unsafe { xcb::cast_event(&ev) };
-                match motion.detail() {
-                    5 => continue, // Scroll wheel down
-                    4 => continue, // Scroll wheel up
-                    _ => break,    // Move on after mouse released
+                let button_release: &xcb::ButtonReleaseEvent = unsafe { xcb::cast_event(&ev) };
+                println!(
+                    "Mouse release: x={}, y={}",
+                    button_release.event_x(),
+                    button_release.event_y()
+                );
+                break; // Move on after mouse released
             }
-            }
-            _ => continue,
+            _ => continue
         };
     }
-
     // Now we have taken coordinates, we use them
-    let width = (x - start_x).abs();
-    let height = (y - start_y).abs();
-    println!("{}x{}+{}+{}", width, height, start_x, start_y);
+    // TODO
 }