further changes to ui

Author: jackyarndley

src/ui.rs

@@ -163,7 +163,7 @@ pub fn window_main(renderer: Arc<Mutex<FractalRenderer>>) -> impl Widget<Fractal
         .with_child(Flex::row()
             .with_child(Label::new("Pattern Zoom: ").with_text_size(14.0))
             .with_flex_child(Slider::new()
-                .with_range(-1.0,4.0).expand_width()
+                .with_range(0.0,4.0).expand_width()
                 .lens(FractalData::root_zoom_factor.map(
                     |val| (1.0 / (1.0 - val)).log2(), 
                     |val, new| *val = 1.0 - (1.0 / 2.0_f64.powf(new.round())))), 1.0)
@@ -217,12 +217,12 @@ pub fn window_main(renderer: Arc<Mutex<FractalRenderer>>) -> impl Widget<Fractal
                     };
                 }).lens(FractalData::mouse_mode).expand_width().fix_height(24.0), 1.0)
             .with_spacer(4.0)
-            .with_flex_child(Button::new("CENTRAL OUT").on_click(|ctx, _data: &mut FractalData, _env| {
-                ctx.submit_command(MULTIPLY_PATTERN.with(-1.0));
+            .with_flex_child(Button::new("CENTRAL OUT").on_click(|ctx, data: &mut FractalData, _env| {
+                ctx.submit_command(MULTIPLY_PATTERN.with(1.0 - 1.0 / (1.0 - data.root_zoom_factor)));
             }).expand_width().fix_height(24.0), 1.0)
             .with_spacer(4.0)
-            .with_flex_child(Button::new("CENTRAL IN").on_click(|ctx, _data: &mut FractalData, _env| {
-                ctx.submit_command(MULTIPLY_PATTERN.with(0.5));
+            .with_flex_child(Button::new("CENTRAL IN").on_click(|ctx, data: &mut FractalData, _env| {
+                ctx.submit_command(MULTIPLY_PATTERN.with(data.root_zoom_factor));
             }).expand_width().fix_height(24.0), 1.0));
 
     let group_palette = Flex::column()

src/widgets/fractal.rs

@@ -383,6 +383,7 @@ impl<'a> Widget<FractalData> for FractalWidget<'a> {
 
                 if let Some(root_zoom) = command.get(ROOT_FINDING_COMPLETE) {
                     self.mouse_mode = MouseMode::None;
+                    self.pos1 = self.pos2;
 
                     data.root_progress = 1.0;
                     data.root_iteration = 64;
@@ -756,16 +757,18 @@ impl<'a> Widget<FractalData> for FractalWidget<'a> {
                 if let Some(factor) = command.get(MULTIPLY_PATTERN) {
                     let new_zoom = linear_interpolation_between_zoom(renderer.zoom, string_to_extended(&data.root_zoom), *factor);
 
-                    renderer.zoom = new_zoom;
+                    if new_zoom.exponent > -1 {
+                        renderer.zoom = new_zoom;
 
-                    data.zoom = extended_to_string_long(renderer.zoom);
-                    settings.set("zoom", data.zoom.clone()).unwrap();
-
-                    if string_to_extended(&data.zoom) > string_to_extended(&data.center_reference_zoom) {
-                        data.need_full_rerender = true;
-                    };
+                        data.zoom = extended_to_string_long(renderer.zoom);
+                        settings.set("zoom", data.zoom.clone()).unwrap();
 
-                    ctx.submit_command(RESET_RENDERER_FAST);
+                        if string_to_extended(&data.zoom) > string_to_extended(&data.center_reference_zoom) {
+                            data.need_full_rerender = true;
+                        };
+    
+                        ctx.submit_command(RESET_RENDERER_FAST);
+                    }
 
                     return;
                 }