Fix critical bugs and improve laptop compatibility

Major fixes:
- Fix keybinding closure bug causing all zones to map to zone 9
- Change keybindings from Super+Numpad to Super+Ctrl+1-9 for laptop compatibility
- Fix shift-drag detection by implementing continuous modifier polling during window drag
- Fix window object reference by using global.display.focus_window
- Fix window API compatibility (use property checks instead of get_maximized())
- Correct grab-op-begin/end signal handler parameters

Technical improvements:
- Add modifier polling (50ms interval) during window drag to detect Shift key press/release
- Use Mainloop.idle_add to defer window resize operations
- Remove debug logging for production use
- Improve error handling and cleanup in destroy() method

The extension now fully supports:
- Shift-drag window snapping with visual zone overlay
- Keyboard shortcuts for direct zone snapping (Super+Ctrl+1-9)
- Zone overlay toggle (Super+Z)
- Layout cycling (Super+Shift+Z)
- Graphical zone editor (Super+Shift+E)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

README.md

@@ -31,7 +31,7 @@ A window tiling manager extension for Linux Mint's Cinnamon Desktop, inspired by
 - **Super + Z**: Toggle zone overlay (show/hide zones)
 - **Super + Shift + Z**: Cycle through different layouts
 - **Super + Shift + E**: Open graphical zone editor
-- **Super + Numpad 1-9**: Snap focused window to zone 1-9
+- **Super + Ctrl + 1-9**: Snap focused window to zone 1-9
 
 ### Mouse Usage
 

extension.js

@@ -333,6 +333,7 @@ ZoneManager.prototype = {
         this.layouts = DEFAULT_LAYOUTS;
         this.isShowing = false;
         this.dragInProgress = false;
+        this.draggedWindow = null;
         this.editor = new ZoneEditor();
 
         // Connect to window grab events
@@ -346,6 +347,9 @@ ZoneManager.prototype = {
             Lang.bind(this, this._onGrabBegin));
         this.grabOpEndId = global.display.connect('grab-op-end',
             Lang.bind(this, this._onGrabEnd));
+
+        // Monitor for modifier key changes
+        this.modifierPollTimeoutId = null;
     },
     
     _setupKeybindings: function() {
@@ -363,38 +367,68 @@ ZoneManager.prototype = {
             Lang.bind(this, function() { this.editor.startEditor(); })
         );
 
-        // Add keybindings for quick snap to zones (Super+Numpad)
+        // Add keybindings for quick snap to zones (Super+Ctrl+1-9)
         for (let i = 1; i <= 9; i++) {
+            const zoneIndex = i - 1;  // Capture the value for this iteration
             Main.keybindingManager.addHotKey(
                 'snap-to-zone-' + i,
-                '<Super>KP_' + i,
+                '<Super><Ctrl>' + i,
-                Lang.bind(this, function() { this._snapToZone(i - 1); })
+                Lang.bind(this, function() {
+                    this._snapToZone(zoneIndex);
+                })
             );
         }
     },
     
-    _onGrabBegin: function(display, window, op) {
+    _checkModifiersDuringDrag: function() {
-        // Check if this is a window move operation
+        if (!this.dragInProgress) {
-        if (op === Meta.GrabOp.MOVING) {
+            return false; // Stop polling
-            this.dragInProgress = true;
-            
-            // Check if Shift is held - show overlay
-            let mods = global.get_pointer()[2];
-            if (mods & Clutter.ModifierType.SHIFT_MASK) {
-                this._showZonesOverlay();
-            }
         }
+
+        let pointerInfo = global.get_pointer();
+        let mods = pointerInfo[2];
+        let shiftPressed = !!(mods & Clutter.ModifierType.SHIFT_MASK);
+
+        if (shiftPressed && !this.isShowing) {
+            this._showZonesOverlay();
+        } else if (!shiftPressed && this.isShowing) {
+            this._hideZonesOverlay();
+        }
+
+        return true; // Continue polling
     },
 
-    _onGrabEnd: function(display, window, op) {
+    _onGrabBegin: function(display, window) {
-        if (op === Meta.GrabOp.MOVING && this.dragInProgress) {
+        // Window drag has begun
+        this.dragInProgress = true;
+
+        // Get the actual window being dragged - use focus_window as it's the dragged window
+        this.draggedWindow = global.display.focus_window;
+
+        // Start polling for modifier key changes during drag
+        if (this.modifierPollTimeoutId) {
+            Mainloop.source_remove(this.modifierPollTimeoutId);
+        }
+        this.modifierPollTimeoutId = Mainloop.timeout_add(50, Lang.bind(this, this._checkModifiersDuringDrag));
+    },
+
+    _onGrabEnd: function(display, window) {
+        if (this.dragInProgress) {
             this.dragInProgress = false;
 
+            // Stop polling for modifiers
+            if (this.modifierPollTimeoutId) {
+                Mainloop.source_remove(this.modifierPollTimeoutId);
+                this.modifierPollTimeoutId = null;
+            }
+
             if (this.isShowing) {
                 // Snap to zone if cursor is over one
-                this._snapWindowToZone(window);
+                this._snapWindowToZone(this.draggedWindow);
                 this._hideZonesOverlay();
             }
+
+            this.draggedWindow = null;
         }
     },
     
@@ -527,8 +561,10 @@ ZoneManager.prototype = {
     },
     
     _moveWindowToZone: function(window, zone, monitor) {
+        if (!window || !zone || !monitor) return;
+
         // Unmaximize if maximized
-        if (window.get_maximized()) {
+        if (window.maximized_horizontally || window.maximized_vertically) {
             window.unmaximize(Meta.MaximizeFlags.BOTH);
         }
 
@@ -538,8 +574,13 @@ ZoneManager.prototype = {
         let width = Math.round(monitor.width * zone.width);
         let height = Math.round(monitor.height * zone.height);
 
-        // Move and resize window
+        // Use Mainloop.idle_add to defer the operation
-        window.move_resize_frame(true, x, y, width, height);
+        // This ensures the unmaximize completes before move/resize
+        Mainloop.idle_add(Lang.bind(this, function() {
+            // Move and resize window (false = programmatic operation, not user-initiated)
+            window.move_resize_frame(false, x, y, width, height);
+            return false; // Don't repeat
+        }));
     },
     
     cycleLayout: function() {
@@ -558,28 +599,40 @@ ZoneManager.prototype = {
     },
     
     destroy: function() {
-        // Disconnect signals
+        // Clean up overlay FIRST to prevent corrupt display
-        if (this.grabOpBeginId) {
-            global.display.disconnect(this.grabOpBeginId);
-        }
-        if (this.grabOpEndId) {
-            global.display.disconnect(this.grabOpEndId);
-        }
-        
-        // Remove keybindings
-        Main.keybindingManager.removeHotKey('show-zones');
-        Main.keybindingManager.removeHotKey('open-zone-editor');
-        for (let i = 1; i <= 9; i++) {
-            Main.keybindingManager.removeHotKey('snap-to-zone-' + i);
-        }
-        
-        // Clean up overlay
         this._hideZonesOverlay();
 
+        // Stop modifier polling if active
+        if (this.modifierPollTimeoutId) {
+            Mainloop.source_remove(this.modifierPollTimeoutId);
+            this.modifierPollTimeoutId = null;
+        }
+
         // Clean up editor
         if (this.editor) {
             this.editor._cancelEditor();
         }
+
+        // Disconnect signals
+        if (this.grabOpBeginId) {
+            global.display.disconnect(this.grabOpBeginId);
+            this.grabOpBeginId = null;
+        }
+        if (this.grabOpEndId) {
+            global.display.disconnect(this.grabOpEndId);
+            this.grabOpEndId = null;
+        }
+
+        // Remove keybindings
+        try {
+            Main.keybindingManager.removeHotKey('show-zones');
+            Main.keybindingManager.removeHotKey('open-zone-editor');
+            for (let i = 1; i <= 9; i++) {
+                Main.keybindingManager.removeHotKey('snap-to-zone-' + i);
+            }
+        } catch(e) {
+            global.logError('GridSnap: Error removing keybindings - ' + e);
+        }
     }
 };
 

install.sh

@@ -27,8 +27,9 @@ echo "2. Open System Settings → Extensions"
 echo "3. Find 'GridSnap' and toggle it on"
 echo ""
 echo "Keyboard shortcuts:"
-echo "  Super+Z         : Show/hide zones"
+echo "  Super+Z          : Show/hide zones"
-echo "  Super+Shift+Z   : Cycle layouts"
+echo "  Super+Shift+Z    : Cycle layouts"
-echo "  Super+Numpad1-9 : Snap to zone"
+echo "  Super+Ctrl+1-9   : Snap to zone"
+echo "  Super+Shift+E    : Open zone editor"
 echo ""
 echo "Enjoy your new window manager!"