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#![allow(dead_code)]
use crate::{
elements::{CanvasElement, Element},
foundation::Slot,
foundation::{KeyEvent, MouseEvent, TextEvent},
};
pub struct Focus {
pub canvas: CanvasElement,
onmousemove: Option<Slot>,
onmousedown: Option<Slot>,
onmouseup: Option<Slot>,
onmousewheel: Option<Slot>,
onkeydown: Option<Slot>,
onkeyup: Option<Slot>,
ontextinput: Option<Slot>,
}
impl Focus {
pub fn new(canvas: CanvasElement) -> Self {
let instance = Self {
canvas,
onkeydown: None,
onkeyup: None,
onmousedown: None,
onmousemove: None,
onmouseup: None,
onmousewheel: None,
ontextinput: None,
};
// let component = instance.canvas.as_ref();
// instance.onmousemove = Some(component.onmousemove.listen(box |e| instance.mousemove(e)));
// instance.onmousedown = Some(component.onmousedown.listen(box |e| instance.mousedown(e)));
// instance.onmouseup = Some(component.onmouseup.listen(box |e| instance.mouseup(e)));
// instance.onmousewheel = Some(component.onmousewheel.listen(box |e| instance.mousewheel(e)));
// instance.onkeydown = Some(component.onkeydown.listen(box |e| instance.keydown(e)));
// instance.onkeyup = Some(component.onkeyup.listen(box |e| instance.keyup(e)));
// instance.ontextinput = Some(component.ontextinput.listen(box |e| instance.textinput(e)));
instance
}
pub fn destroy(&self) {
// let component = self.canvas.as_ref().borrow();
// if let Some(slot) = self.onmousemove {
// component.onmousemove.remove(slot);
// }
// if let Some(slot) = self.onmousedown {
// component.onmousedown.remove(slot);
// }
// if let Some(slot) = self.onmouseup {
// component.onmouseup.remove(slot);
// }
// if let Some(slot) = self.onmousewheel {
// component.onmousewheel.remove(slot);
// }
// if let Some(slot) = self.onkeydown {
// component.onkeydown.remove(slot);
// }
// if let Some(slot) = self.onkeyup {
// component.onkeyup.remove(slot);
// }
// if let Some(slot) = self.ontextinput {
// component.ontextinput.remove(slot);
// }
}
fn keydown(&self, e: &mut KeyEvent) {
if let Some(focused) = self.canvas.focused() {
if focused.key_input() {
focused.keydown(e);
}
}
}
fn keyup(&self, e: &mut KeyEvent) {
if let Some(focused) = self.canvas.focused() {
if focused.key_input() {
focused.keyup(e);
}
}
}
fn textinput(&self, e: &mut TextEvent) {
if let Some(focused) = self.canvas.focused() {
if focused.key_input() {
focused.textinput(e);
}
}
}
fn mousedown(&self, e: &mut MouseEvent) {
if let Some(focused) = self.canvas.focused() {
if focused.mouse_input() {
focused.mousedown(e);
}
}
if self.marked_mouse() {
if let Some(marked) = self.canvas.marked() {
marked.mousedown(e);
}
}
}
fn mouseup(&self, e: &mut MouseEvent) {
if let Some(focused) = self.canvas.focused() {
if focused.mouse_input() {
focused.mouseup(e);
}
}
if self.marked_mouse() {
if let Some(marked) = self.canvas.marked() {
marked.mouseup(e);
}
}
}
fn mousewheel(&self, e: &mut MouseEvent) {
if let Some(focused) = self.canvas.focused() {
if focused.mouse_input() {
focused.mousewheel(e);
}
}
if self.marked_mouse() {
if let Some(marked) = self.canvas.marked() {
marked.mousewheel(e);
}
}
}
fn marked_mouse(&self) -> bool {
if let Some(marked) = self.canvas.marked() {
if let Some(focused) = self.canvas.focused() {
return (marked != focused) && marked.mouse_input();
}
}
false
}
fn get_markable(&self, target: &dyn Element, x: f32, y: f32) -> Option<&dyn Element> {
let highest = target.topmost_child_at_point(x, y);
if let Some(current) = highest {
if current.id() == target.id() {
return None;
} else {
// let canvas = target.canvas.as_ref();
// // now if we have the highest possible control,
// // we have to walk backward up the tree,
// // looking for the highest one with mouse input
// let canvas = target.canvas.as_ref();
// loop {
// if highest.is_none() || highest == canvas {
// return highest;
// }
// if current.mouse_input {
// return current;
// }
// if current.parent().is_none() {
// return highest;
// }
// highest = current.parent();
// }
todo!()
}
}
None
}
fn mousemove(&self, e: &mut MouseEvent) {
let handled = match self.canvas.captured() {
Some(captured) => {
if captured.mouse_input() {
if let Some(markable) =
self.get_markable(captured.as_ref(), e.x as f32, e.y as f32)
{
self.mark_control(markable, e);
}
if self.marked_mouse() {
if let Some(marked) = self.canvas.marked() {
marked.mousemove(e);
}
}
true
} else {
false
}
}
None => false,
};
let component = self.canvas.component.borrow();
if !handled && component.ishovered {
//if the mouse has left the current marked control, unmark
if let Some(marked) = self.canvas.marked() {
if !marked.contains(e.x as f32, e.y as f32) {
self.unmark_control(marked.as_ref(), e);
}
}
// the focused control always gets the events
if let Some(focused) = self.canvas.focused() {
if focused.mouse_input() {
focused.mousemove(e);
}
}
//get the marked control from the canvas
if let Some(markable) = self.get_markable(&self.canvas, e.x as f32, e.y as f32) {
self.mark_control(markable, e);
}
if self.marked_mouse() {
if let Some(marked) = self.canvas.marked() {
marked.mousemove(e);
}
}
}
}
fn reset_marked(&self, control: &dyn Element, e: &mut MouseEvent) {
if control.is_marked() {
self.unmark_control(control, e);
}
}
fn get_focusable(&self, x: f32, y: f32) -> Option<&Box<dyn Element>> {
if let Some(captured) = self.canvas.captured() {
Some(captured)
} else {
self.canvas.topmost_at_point(x, y)
}
}
fn find_marked(&self, e: &mut MouseEvent) -> Option<&Box<dyn Element>> {
match self.get_focusable(e.x as f32, e.y as f32) {
Some(marked) => {
self.mark_control(marked.as_ref(), e);
Some(marked)
}
None => None,
}
}
fn unmark_control(&self, control: &dyn Element, e: &mut MouseEvent) {
if control.is_marked() {
control.unmark();
if control.mouse_input() {
control.mouseleave(e);
}
}
}
fn mark_control(&self, control: &dyn Element, e: &mut MouseEvent) {
if !control.is_marked() {
if let Some(marked) = self.canvas.marked() {
self.reset_marked(marked.as_ref(), e);
}
control.mark();
if control.mouse_input() {
control.mouseenter(e);
}
}
}
}