1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137

use geom::Duration;

use crate::{Canvas, Event, Key, MultiKey, ScreenPt};

// As we check for user input, record the input and the thing that would happen. This will let us
// build up some kind of OSD of possible actions.
pub struct UserInput {
    pub(crate) event: Event,
    pub(crate) event_consumed: bool,

    lctrl_held: bool,
}

impl UserInput {
    pub(crate) fn new(event: Event, canvas: &Canvas) -> UserInput {
        UserInput {
            event,
            event_consumed: false,
            lctrl_held: canvas.keys_held.contains(&Key::LeftControl),
        }
    }

    pub fn pressed<MK: Into<Option<MultiKey>>>(&mut self, multikey: MK) -> bool {
        let mk = if let Some(mk) = multikey.into() {
            mk
        } else {
            return false;
        };
        if self.event_consumed {
            return false;
        }

        if let Event::KeyPress(pressed) = self.event {
            let same = match mk {
                MultiKey::Normal(key) => pressed == key && !self.lctrl_held,
                MultiKey::LCtrl(key) => pressed == key && self.lctrl_held,
                MultiKey::Any(keys) => !self.lctrl_held && keys.contains(&pressed),
            };
            if same {
                self.consume_event();
                return true;
            }
        }
        false
    }

    pub(crate) fn any_pressed(&mut self) -> Option<Key> {
        if self.event_consumed {
            return None;
        }

        if let Event::KeyPress(key) = self.event {
            self.consume_event();
            return Some(key);
        }
        None
    }

    pub fn key_released(&mut self, key: Key) -> bool {
        if self.event_consumed {
            return false;
        }

        if self.event == Event::KeyRelease(key) {
            self.consume_event();
            return true;
        }
        false
    }

    // No consuming for these?
    // Only places looking at special drag behavior should use these two, otherwise prefer
    // normal_left_click in EventCtx
    pub fn left_mouse_button_pressed(&mut self) -> bool {
        self.event == Event::LeftMouseButtonDown
    }
    pub fn left_mouse_button_released(&mut self) -> bool {
        self.event == Event::LeftMouseButtonUp
    }

    pub fn window_lost_cursor(&self) -> bool {
        self.event == Event::WindowLostCursor
    }

    pub fn get_moved_mouse(&self) -> Option<ScreenPt> {
        if let Event::MouseMovedTo(pt) = self.event {
            return Some(pt);
        }
        None
    }

    pub fn get_mouse_scroll(&self) -> Option<(f64, f64)> {
        if let Event::MouseWheelScroll(dx, dy) = self.event {
            return Some((dx, dy));
        }
        None
    }

    pub fn is_window_resized(&self) -> bool {
        match self.event {
            Event::WindowResized(_) => true,
            _ => false,
        }
    }

    pub fn nonblocking_is_update_event(&mut self) -> Option<Duration> {
        if self.event_consumed {
            return None;
        }

        if let Event::Update(dt) = self.event {
            Some(dt)
        } else {
            None
        }
    }
    pub fn use_update_event(&mut self) {
        self.consume_event();
        match self.event {
            Event::Update(_) => {}
            _ => panic!("Not an update event"),
        }
    }

    pub(crate) fn consume_event(&mut self) {
        assert!(!self.event_consumed);
        self.event_consumed = true;
    }
    pub(crate) fn unconsume_event(&mut self) {
        assert!(self.event_consumed);
        self.event_consumed = false;
    }

    pub(crate) fn has_been_consumed(&self) -> bool {
        self.event_consumed
    }
}