toCommand method
Implementation
String toCommand() {
String w = '0';
String h = '0';
if (this.w != 0) {
w = '((W-w)/${this.w})';
}
if (this.h != 0) {
h = '((H-h)/${this.h})';
}
return '$w+${padding.left}-${padding.right}:$h+${padding.top}-${padding.bottom}';
}