slider

src/main.c3

@@ -65,6 +65,10 @@ fn int main(String[] args)
 			if (ctx.button("button2", ugui::Rect{0,0,30,30})!!.mouse_release) {
 				io::printn("release button2");
 			}
+			if (ctx.slider_hor("slider", ugui::Rect{0,0,100,30})!!.update) {
+				ugui::Elem* e = ctx.get_elem_by_label("slider")!!;
+				io::printfn("slider: %f", e.slider.value);
+			}
 		|};
 		ctx.div_end()!!;
 

src/ugui_button.c3

@@ -23,9 +23,6 @@ fn ElemEvents! Ctx.button(&ctx, String label, Rect size)
 		// TODO: 3. Fill the button specific fields
 	}
 
-	// TODO: Check for interactions
-	// FIXME: this is not how normal buttons work, usually focus follows both
-	//        mouse hover and mouse down
 	c_elem.events = ctx.get_elem_events(c_elem);
 	if (parent.flags.has_focus) {
 		if (c_elem.events.mouse_hover) {

src/ugui_data.c3

@@ -23,6 +23,7 @@ enum ElemType {
 	ETYPE_NONE,
 	ETYPE_DIV,
 	ETYPE_BUTTON,
+	ETYPE_SLIDER,
 }
 
 bitstruct ElemFlags : uint {
@@ -39,6 +40,7 @@ bitstruct ElemEvents : uint {
 	bool mouse_press   : 4;
 	bool mouse_release : 5;
 	bool mouse_hold    : 6;
+	bool update        : 7;
 }
 
 enum DivLayout {
@@ -54,6 +56,12 @@ struct Div {
 	Color color_bg;
 }
 
+// slider element
+struct Slider {
+    float value;
+    Rect handle;
+}
+
 // element structure
 struct Elem {
 	Id id;
@@ -63,6 +71,7 @@ struct Elem {
 	ElemType type;
 	union {
 		Div div;
+		Slider slider;
 	}
 }
 

src/ugui_impl.c3

@@ -24,6 +24,14 @@ macro Ctx.get_elem(&ctx, Id id)
 	return c_elem;
 }
 
+// this searches an element in the cache by label, it does not create a new element
+// if it does't find one
+macro Ctx.get_elem_by_label(&ctx, String label)
+{
+    Id id = hash(label);
+    return ctx.cache.search(id);
+}
+
 fn void! Ctx.init(&ctx)
 {
 	ctx.tree.init(MAX_ELEMENTS)!;

src/ugui_input.c3

@@ -83,11 +83,13 @@ macro Ctx.is_mouse_down(&ctx, MouseButtons btn)
 macro ElemEvents Ctx.get_elem_events(&ctx, Elem *elem)
 {
     // TODO: add the other events
+    // FIXME: active should be elsewhere
+    bool active = elem.events.mouse_hold || ctx.is_hovered(elem);
     ElemEvents ev = {
         .mouse_hover = ctx.is_hovered(elem),
-        .mouse_press = ctx.is_mouse_pressed(BTN_ANY),
-		.mouse_release = ctx.is_mouse_released(BTN_ANY),
-		.mouse_hold = ctx.is_mouse_down(BTN_ANY),
+        .mouse_press = active & ctx.is_mouse_pressed(BTN_ANY),
+		.mouse_release = active & ctx.is_mouse_released(BTN_ANY),
+		.mouse_hold = active & ctx.is_mouse_down(BTN_ANY),
     };
     return ev;
 }
@@ -101,8 +103,20 @@ fn void Ctx.input_mouse_button(&ctx, MouseButtons buttons)
 }
 
 // Mouse was moved, report absolute position
-// TODO: implement this
-fn void Ctx.input_mouse_abs(&ctx, short x, short y) { return; }
+fn void Ctx.input_mouse_abs(&ctx, short x, short y)
+{
+	ctx.input.mouse.pos.x = clamp(x, 0u16, ctx.width);
+	ctx.input.mouse.pos.y = clamp(y, 0u16, ctx.height);
+
+	short dx, dy;
+	dx = x - ctx.input.mouse.pos.x;
+	dy = y - ctx.input.mouse.pos.y;
+
+	ctx.input.mouse.delta.x = dx;
+	ctx.input.mouse.delta.y = dy;
+
+	ctx.input.events.mouse_move = true;
+}
 
 // Mouse was moved, report relative motion
 fn void Ctx.input_mouse_delta(&ctx, short dx, short dy)

src/ugui_slider.c3

@@ -0,0 +1,66 @@
+module ugui;
+
+fn ElemEvents! Ctx.slider_hor(&ctx, String label, Rect size)
+{
+    Id id = hash(label);
+
+	Elem *parent = ctx.get_parent()!;
+	Elem *c_elem = ctx.get_elem(id)!;
+	// add it to the tree
+	ctx.tree.add(id, ctx.active_div)!;
+
+	// 1. Fill the element fields
+	c_elem.type = ETYPE_SLIDER;
+
+	// if the element is new or the parent was updated then redo layout
+	if (c_elem.flags.is_new || parent.flags.updated) {
+		// 2. Layout
+		c_elem.rect = ctx.position_element(parent, size, true);
+		/*       handle
+		 * +----+-----+---------------------+
+		 * |    |#####|                     |
+		 * +----+-----+---------------------+
+	     */
+		c_elem.slider.handle = Rect{
+			.x = (short)(c_elem.rect.x + (int)(c_elem.rect.w * c_elem.slider.value)),
+			.y = c_elem.rect.y,
+			.w = (short)(c_elem.rect.w * 0.25),
+			.h = c_elem.rect.h,
+		};
+	}
+
+	c_elem.events = ctx.get_elem_events(c_elem);
+	if (parent.flags.has_focus && c_elem.events.mouse_hover) {
+	    if (point_in_rect(ctx.input.mouse.pos, c_elem.slider.handle) && c_elem.events.mouse_hold) {
+			short x = (short)clamp(ctx.input.mouse.pos.x - c_elem.slider.handle.w/2, c_elem.rect.x, c_elem.rect.x + c_elem.rect.w - c_elem.slider.handle.w);
+			float v = (float)(c_elem.slider.handle.x-c_elem.rect.x) / (float)(c_elem.rect.w-c_elem.slider.handle.w);
+			c_elem.slider.handle.x = x;
+			c_elem.slider.value = v;
+			c_elem.events.update = true;
+		}
+	}
+
+	// Draw the button
+	Color bg_color = uint_to_rgba(0x0000ffff);
+	Color handle_color = uint_to_rgba(0x0ff000ff);
+
+	Cmd cmd = {
+	    .type = CMD_RECT,
+	    .rect =	{
+		    .rect  = c_elem.rect,
+		    .color = bg_color,
+		},
+	};
+	ctx.cmd_queue.enqueue(&cmd)!;
+
+	cmd = Cmd{
+	    .type = CMD_RECT,
+	    .rect =	{
+		    .rect  = c_elem.slider.handle,
+		    .color = handle_color,
+		},
+	};
+	ctx.cmd_queue.enqueue(&cmd)!;
+
+	return c_elem.events;
+}