var spacePressed = false;

function KeyPress(e) {
    var keyboardEvent = window.event? event : e;

    //if the user is typing in an input field, ignore these hotkeys
    if (document.activeElement.tagName == 'INPUT') return;

    //if no document has been created yet,
    //orthere is a dialog box open
    //ignore hotkeys
    if (!documentCreated || dialogueOpen) return;

    //
    if (e.key === 'Escape') {
        if (!selectionCanceled) {
            endSelection();
            changeTool('pencil');
        }
    } else {
        switch (keyboardEvent.keyCode) {
            //pencil tool - 1, b
            case 49: case 66: 
                changeTool('pencil');
                break;
                //fill tool - 2, f
            case 50: case 70:
                changeTool('fill');
                break;
                //eyedropper - 3, e
            case 51: case 69:
                changeTool('eyedropper');
                break;
                //pan - 4, p,
            case 52: case 80:
                changeTool('pan');
                break;
                //zoom - 5
            case 53:
                changeTool('zoom');
                break;
                // eraser -6, r
            case 54: case 82:
                console.log('Pressed r');
                changeTool('eraser');
                break;
                // Rectangular selection	
            case 77: case 109:
                changeTool('rectselect');
                break;
                //Z
            case 90:
                console.log('PRESSED Z ', keyboardEvent.ctrlKey);
                //CTRL+ALT+Z redo
                if (keyboardEvent.altKey && keyboardEvent.ctrlKey) 
                    redo();
                if (!selectionCanceled) {
                    endSelection();
                    changeTool('pencil');
                }
                //CTRL+Z undo
                else if (keyboardEvent.ctrlKey) {
                    undo();
                    if (!selectionCanceled) {
                        endSelection();
                        changeTool('pencil');
                    }
                }
                //Z switch to zoom tool
                else 
                    changeTool('zoom');
                break;
                //redo - ctrl y
            case 89:
                if (keyboardEvent.ctrlKey) 
                    redo();
                break;
            case 32:
                spacePressed=true;
                break;
        }
    }
}

document.onkeydown = KeyPress;

window.addEventListener('keyup', function (e) {

    if (e.keyCode == 32) spacePressed = false;

});