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scale the zoom speed based on how far already zoomed in

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This commit is contained in:
Dustin Carlino 2018-08-05 15:22:55 -07:00
parent be4ffc8d31
commit b1c74157d9
1 changed files with 4 additions and 15 deletions
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19
ezgui/src/canvas.rs
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@ -9,8 +9,7 @@ use piston::window::Size;
use text;
use GfxCtx;
const ZOOM_SPEED: f64 = 0.05;
//const PAN_SPEED: f64 = 10.0;
const ZOOM_SPEED: f64 = 0.1;
pub struct Canvas {
pub cam_x: f64,
@ -61,20 +60,10 @@ impl Canvas {
if let Some(Button::Mouse(MouseButton::Left)) = ev.release_args() {
self.left_mouse_drag_from = None;
}
// These aren't used much now, and they conflict with other plugins
/*if let Some(Button::Keyboard(key)) = ev.press_args() {
match key {
Key::Up => self.cam_y -= PAN_SPEED,
Key::Down => self.cam_y += PAN_SPEED,
Key::Left => self.cam_x -= PAN_SPEED,
Key::Right => self.cam_x += PAN_SPEED,
Key::Q => self.zoom_towards_mouse(-ZOOM_SPEED),
Key::W => self.zoom_towards_mouse(ZOOM_SPEED),
_ => {}
}
}*/
if let Some(scroll) = ev.mouse_scroll_args() {
self.zoom_towards_mouse(scroll[1] * ZOOM_SPEED);
// Zoom slower at low zooms, faster at high.
let delta = scroll[1] * ZOOM_SPEED * self.cam_zoom;
self.zoom_towards_mouse(delta);
}
}