tyui sliders

2 files changed, 65 insertions, 0 deletions

diff --git a/teensy/teensy_ui.c b/teensy/teensy_ui.c
index a0bb5e3..c58113c 100644
--- a/teensy/teensy_ui.c
+++ b/teensy/teensy_ui.c
@@ -88,6 +88,7 @@ tyui_Style default_style = {
     .padding          = 1,
     .control_padding  = 2,
     .frame_size       = 1,
+    .grabber_size     = 4,
 };
 
 static
@@ -450,6 +451,60 @@ bool tyui_button(const char *text)
     return clicked;
 }
 
+void tyui_slider_ex(
+    float min,
+    float max,
+    float *value_ptr,
+    bool show_value,
+    tyui_Align value_align
+) {
+    assert(value_ptr);
+
+    const int grabber_size = uictx.style.grabber_size;
+
+    ty_Recti rect = next_rect(TEXT_HEIGHT + control_padding() * 2);
+    ty_Color bg_col = uictx.style.bg_normal;
+    ty_Color fg_col = uictx.style.fg_normal;
+
+    bool clicked = false;
+    if (is_hovered(rect)) {
+        clicked = window()->has_lmb;
+        if (ty_button_down(TY_BTN_DB_LMB)) {
+            bg_col = uictx.style.bg_pressed;
+            fg_col = uictx.style.fg_pressed;
+        } else {
+            bg_col = uictx.style.bg_hover;
+            fg_col = uictx.style.fg_hover;
+        }
+    }
+
+    if (clicked) {
+        ty_Vec2i mp = ty_mouse_pos();
+        float x = mp.x - rect.x;
+        float p = x / (rect.w - 1);
+        *value_ptr = ty_clamp(p * (max - min) + min, min, max);
+    }
+
+    float value = *value_ptr;
+
+    draw_frame(rect, bg_col);
+    if (show_value)
+        text_cmd(ty_format("%d", (int)round(value)), rect, value_align);
+
+    // Grabber
+    {
+        float p = (value - min) / max;
+        int x = (rect.w - grabber_size) * p + rect.x;
+
+        ty_Recti grabber_rect = ty_recti(
+            x, rect.y,
+            grabber_size, rect.h
+        );
+
+        draw_frame(grabber_rect, fg_col);
+    }
+}
+
 static
 void draw_window(Window *win)
 {
diff --git a/teensy/teensy_ui.h b/teensy/teensy_ui.h
index da7691f..8efc7bd 100644
--- a/teensy/teensy_ui.h
+++ b/teensy/teensy_ui.h
@@ -14,6 +14,8 @@
 #define tyui_begin_window(title, rect, id) \
     tyui_begin_window_ex(title, rect, id, 0, NULL)
 #define tyui_text(...) tyui_text_ex(TYUI_ALIGN_LEFT, __VA_ARGS__)
+#define tyui_slider(min, max, value_ptr) \
+    tyui_slider_ex(min, max, value_ptr, true, TYUI_ALIGN_CENTER)
 
 typedef uint8_t tyui_Align;
 enum {
@@ -37,6 +39,7 @@ typedef struct {
     int padding;
     int control_padding;
     int frame_size;
+    int grabber_size;
 } tyui_Style;
 
 typedef uint8_t tyui_Id;
@@ -58,6 +61,13 @@ void tyui_end_window(void);
 
 bool tyui_button(const char *text);
 void tyui_text_ex(tyui_Align align, const char *fmt, ...);
+void tyui_slider_ex(
+    float min,
+    float max,
+    float *value_ptr,
+    bool show_value,
+    tyui_Align value_align
+);
 
 void tyui_draw(void);