From d69b2245b8ae5f7a5a3ee035707935144e5a8ebc Mon Sep 17 00:00:00 2001
From: Zack Buhman <zack@buhman.org>
Date: Sun, 29 Jun 2025 00:02:45 -0500
Subject: [PATCH] add widget containers and widget mouse picking

---
 src/cursor.cpp              | 17 ++++++---
 src/cursor.hpp              |  2 ++
 src/main.cpp                | 70 -------------------------------------
 src/scene/tracker/scene.cpp | 70 +++++++++++++++++++++++++++++++++++--
 src/scene/tracker/scene.hpp |  2 ++
 src/widget/bounding_box.hpp | 35 ++++++++++++++++---
 src/widget/button.cpp       | 62 ++++++++++++++++++++------------
 src/widget/button.hpp       | 28 +++++++++++----
 src/widget/container.hpp    | 47 +++++++++++++++++++++++++
 src/widget/left_aligned.hpp | 23 ++++++++++++
 src/widget/top_aligned.hpp  | 23 ++++++++++++
 src/widget/widget.hpp       | 50 ++++++++++++++++++++++++++
 12 files changed, 318 insertions(+), 111 deletions(-)
 create mode 100644 src/widget/container.hpp
 create mode 100644 src/widget/left_aligned.hpp
 create mode 100644 src/widget/top_aligned.hpp
 create mode 100644 src/widget/widget.hpp

diff --git a/src/cursor.cpp b/src/cursor.cpp
index cfb0cf9..3b56d99 100644
--- a/src/cursor.cpp
+++ b/src/cursor.cpp
@@ -9,6 +9,8 @@
 
 #include "sh7091/serial.hpp"
 
+#include "math/math.hpp"
+
 #include "input.hpp"
 #include "cursor.hpp"
 #include "framebuffer.hpp"
@@ -39,10 +41,12 @@ namespace cursor {
 
         auto& data = data_fields.data;
 
-        float dx = static_cast<float>(data.analog_coordinate_axis[2] - 0x80) *  0.015;
-        float dy = static_cast<float>(data.analog_coordinate_axis[3] - 0x80) * -0.015;
+        float dx = static_cast<float>(data.analog_coordinate_axis[2] - 0x80) * 0.015;
+        float dy = static_cast<float>(data.analog_coordinate_axis[3] - 0x80) * 0.015;
         state[port_ix].x += dx;
         state[port_ix].y += dy;
+	state[port_ix].a = ft0::data_transfer::digital_button::a(data.digital_button) == 0;
+	state[port_ix].b = ft0::data_transfer::digital_button::b(data.digital_button) == 0;
 
         state[port_ix].active = true;
       } else if ((port.function_type & function_type::pointing) != 0 && port.host_response_data_transfer_ft9 != nullptr) {
@@ -51,13 +55,18 @@ namespace cursor {
         if ((std::byteswap(data_fields.function_type) & function_type::pointing) == 0)
           continue;
         auto& data = data_fields.data;
-        float dx = static_cast<float>(data.analog_coordinate_axis[0] - 0x200) *  0.065;
-        float dy = static_cast<float>(data.analog_coordinate_axis[1] - 0x200) * -0.065;
+        float dx = static_cast<float>(data.analog_coordinate_axis[0] - 0x200) * 0.65;
+        float dy = static_cast<float>(data.analog_coordinate_axis[1] - 0x200) * 0.65;
         state[port_ix].x += dx;
         state[port_ix].y += dy;
+        state[port_ix].a = ft9::data_transfer::digital_button::a(data.digital_button) == 0;
+	state[port_ix].b = ft9::data_transfer::digital_button::b(data.digital_button) == 0;
 
         state[port_ix].active = true;
       }
+
+      state[port_ix].x = clamp<float>(state[port_ix].x, 0, framebuffer.px_width - 1);
+      state[port_ix].y = clamp<float>(state[port_ix].y, 0, framebuffer.px_height - 1);
     }
   }
 
diff --git a/src/cursor.hpp b/src/cursor.hpp
index cabe86a..675108f 100644
--- a/src/cursor.hpp
+++ b/src/cursor.hpp
@@ -6,6 +6,8 @@ namespace cursor {
     bool active;
     float x;
     float y;
+    bool a;
+    bool b;
   };
 
   extern struct cursor state[4];
diff --git a/src/main.cpp b/src/main.cpp
index 1f1cc39..ab01360 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -59,75 +59,6 @@ void vbr600()
   asm volatile ("ldc %0,sr" : : "r" (sr));
 }
 
-/*
-void input_update()
-{
-  int ra = ft0::data_transfer::digital_button::ra(data[0].digital_button) == 0;
-  int la = ft0::data_transfer::digital_button::la(data[0].digital_button) == 0;
-  int da = ft0::data_transfer::digital_button::da(data[0].digital_button) == 0;
-  int ua = ft0::data_transfer::digital_button::ua(data[0].digital_button) == 0;
-
-  int x = ft0::data_transfer::digital_button::x(data[0].digital_button) == 0;
-  int y = ft0::data_transfer::digital_button::y(data[0].digital_button) == 0;
-  int a = ft0::data_transfer::digital_button::a(data[0].digital_button) == 0;
-  int b = ft0::data_transfer::digital_button::b(data[0].digital_button) == 0;
-
-  static int last_ra = 0;
-  static int last_la = 0;
-  static int last_da = 0;
-  static int last_ua = 0;
-
-  static int last_x = 0;
-  static int last_y = 0;
-  static int last_a = 0;
-  static int last_b = 0;
-
-  if (ra && ra != last_ra) {
-    sandbox_state.channel_ix += 1;
-    if (sandbox_state.channel_ix > 63)
-      sandbox_state.channel_ix = 0;
-  }
-  if (la && la != last_la) {
-    sandbox_state.channel_ix -= 1;
-    if (sandbox_state.channel_ix < 0)
-      sandbox_state.channel_ix = 63;
-  }
-  if (da && da != last_da) {
-    sandbox_state.pointer_row += 1;
-    if (sandbox_state.pointer_row >= sandbox_labels_length)
-      sandbox_state.pointer_row = 0;
-  }
-  if (ua && ua != last_ua) {
-    sandbox_state.pointer_row -= 1;
-    if (sandbox_state.pointer_row < 0)
-      sandbox_state.pointer_row = sandbox_labels_length - 1;
-  }
-
-  if (x && x != last_x) {
-    label_update(-1);
-  }
-  if (y && y != last_y) {
-    execute_key(0);
-  }
-  if (a && a != last_a) {
-    execute_key(1);
-  }
-  if (b && b != last_b) {
-    label_update(1);
-  }
-
-  last_ra = ra;
-  last_la = la;
-  last_ua = ua;
-  last_da = da;
-
-  last_x = x;
-  last_y = y;
-  last_a = a;
-  last_b = b;
-}
-*/
-
 void load_xm(float clock_multiplier)
 {
   using namespace interpreter;
@@ -194,7 +125,6 @@ void main()
   //test_pattern();
 
   interrupt_init();
-  //channel_sandbox_defaults();
 
   system.IML6NRM = istnrm::end_of_render_tsp
                  | istnrm::v_blank_in
diff --git a/src/scene/tracker/scene.cpp b/src/scene/tracker/scene.cpp
index 0de4b23..27af01b 100644
--- a/src/scene/tracker/scene.cpp
+++ b/src/scene/tracker/scene.cpp
@@ -8,6 +8,50 @@
 #include "channel_status.hpp"
 #include "texture.hpp"
 #include "widget/button.hpp"
+#include "widget/left_aligned.hpp"
+#include "widget/top_aligned.hpp"
+
+#include "cursor.hpp"
+
+void prev_click()
+{
+  printf("prev\n");
+}
+
+widget::button prev_button(50, 50, "prev", prev_click);
+widget::button play_button(50, 50, "play");
+widget::button pause_button(50, 50, "pause");
+widget::button stop_button(50, 50, "stop");
+widget::button next_button(50, 50, "next");
+
+widget::widget * left1_children[] = {
+  &prev_button,
+  &play_button,
+  &pause_button,
+  &stop_button,
+  &next_button,
+};
+int left1_length = (sizeof (left1_children)) / (sizeof (left1_children[0]));
+
+widget::button up_button(50, 50, "up");
+widget::button down_button(50, 50, "down");
+
+widget::widget * left2_children[] = {
+  &up_button,
+  &down_button,
+};
+int left2_length = (sizeof (left2_children)) / (sizeof (left2_children[0]));
+
+widget::left_aligned left_container1(0, 0, 5, left1_children, left1_length);
+widget::left_aligned left_container2(0, 0, 5, left2_children, left2_length);
+
+widget::widget * top_children[] = {
+  &left_container1,
+  &left_container2,
+};
+int top_length = (sizeof (top_children)) / (sizeof (top_children[0]));
+
+widget::top_aligned top = widget::top_aligned(100, 100, 5, top_children, top_length);
 
 namespace scene::tracker {
 
@@ -25,10 +69,31 @@ namespace scene::tracker {
       .punch_through = 32 * 4
     },
     .transfer = transfer,
+    .init = init,
   };
 
+  void init()
+  {
+    top.freeze(0, 0);
+  }
+
+  void update()
+  {
+    for (int i = 0; i < 4; i++) {
+      cursor::cursor& c = cursor::state[i];
+      if (c.active && c.a) {
+        widget::widget * w = top.pick(c.x, c.y);
+        if (w != nullptr) {
+          w->click();
+        }
+      }
+    }
+  }
+
   void transfer(ta_multiwriter& multi)
   {
+    update();
+
     const int x = 3;
     const int y = 100;
 
@@ -69,7 +134,8 @@ namespace scene::tracker {
 
       //tracker::channel_status::transfer(multi.op, 0, 0);
 
-      widget::button(60, 60, 50, 50, "test").draw(multi);
-    }
+      //test_container.draw(multi);
+      top.draw(multi);
+     }
   }
 }
diff --git a/src/scene/tracker/scene.hpp b/src/scene/tracker/scene.hpp
index 8d80b3f..3ed25fd 100644
--- a/src/scene/tracker/scene.hpp
+++ b/src/scene/tracker/scene.hpp
@@ -8,5 +8,7 @@ namespace scene::tracker {
 
   void transfer(ta_multiwriter& multi);
 
+  void init();
+
   extern const struct scene::scene scene;
 }
diff --git a/src/widget/bounding_box.hpp b/src/widget/bounding_box.hpp
index 4c1b901..53db160 100644
--- a/src/widget/bounding_box.hpp
+++ b/src/widget/bounding_box.hpp
@@ -3,10 +3,35 @@
 namespace widget {
 
   struct bounding_box {
-    const float x;
-    const float y;
-    const float width;
-    const float height;
-  };
+    float _x;
+    float _y;
+    float width;
+    float height;
+    float dx;
+    float dy;
 
+    constexpr inline bounding_box(float __x, float __y, float _width, float _height)
+      : _x(__x), _y(__y), width(_width), height(_height), dx(0), dy(0)
+    { }
+
+    constexpr inline float x()
+    {
+      return dx + _x;
+    }
+
+    constexpr inline float y()
+    {
+      return dy + _y;
+    }
+
+    constexpr inline bool inside(float __x, float __y)
+    {
+      return
+           (__x >= x())
+        && (__y >= y())
+        && (__x <= (x() + width))
+        && (__y <= (y() + height))
+        ;
+    }
+  };
 }
diff --git a/src/widget/button.cpp b/src/widget/button.cpp
index d7a07b8..e186075 100644
--- a/src/widget/button.cpp
+++ b/src/widget/button.cpp
@@ -14,6 +14,8 @@ namespace widget {
   const static float highlight_depth = 1.0 / 8.0;
   const static int highlight_color = 0x353a3a;
 
+  const static int highlight_click_color = 0x141616;
+
   const static float background_depth = 1.0 / 7.0;
   const static int background_color = 0x282c2c;
 
@@ -23,10 +25,10 @@ namespace widget {
   void button::draw_shadow(ta_parameter_writer& writer)
   {
     {
-      float x0 = x + 1;
-      float x1 = x + width - 1;
-      float y0 = y;
-      float y1 = y + height;
+      float x0 = x() + 1;
+      float x1 = x() + width - 1;
+      float y0 = y();
+      float y1 = y() + height;
       quad_type_0(writer,
                   {x0, y0, shadow_depth},
                   {x1, y0, shadow_depth},
@@ -35,10 +37,10 @@ namespace widget {
                   shadow_color);
     }
     {
-      float x0 = x;
-      float x1 = x + width;
-      float y0 = y + 1;
-      float y1 = y + height - 1;
+      float x0 = x();
+      float x1 = x() + width;
+      float y0 = y() + 1;
+      float y1 = y() + height - 1;
       quad_type_0(writer,
                   {x0, y0, shadow_depth},
                   {x1, y0, shadow_depth},
@@ -50,10 +52,10 @@ namespace widget {
 
   void button::draw_lowlight(ta_parameter_writer& writer)
   {
-    float x0 = x + 1;
-    float x1 = x + width - 1;
-    float y0 = y + 1;
-    float y1 = y + height - 1;
+    float x0 = x() + 1;
+    float x1 = x() + width - 1;
+    float y0 = y() + 1;
+    float y1 = y() + height - 1;
     quad_type_0(writer,
                 {x0, y0, lowlight_depth},
                 {x1, y0, lowlight_depth},
@@ -64,24 +66,26 @@ namespace widget {
 
   void button::draw_highlight(ta_parameter_writer& writer)
   {
-    float x0 = x + 1;
-    float x1 = x + width - 2;
-    float y0 = y + 1;
-    float y1 = y + height - 2;
+    float x0 = x() + 1;
+    float x1 = x() + width - 2;
+    float y0 = y() + 1;
+    float y1 = y() + height - 2;
+
+    int color = (click_state == click_type::release) ? highlight_color : highlight_click_color;
     quad_type_0(writer,
                 {x0, y0, highlight_depth},
                 {x1, y0, highlight_depth},
                 {x1, y1, highlight_depth},
                 {x0, y1, highlight_depth},
-                highlight_color);
+                color);
   }
 
   void button::draw_background(ta_parameter_writer& writer)
   {
-    float x0 = x + 2;
-    float x1 = x + width - 2;
-    float y0 = y + 2;
-    float y1 = y + height - 2;
+    float x0 = x() + 2;
+    float x1 = x() + width - 2;
+    float y0 = y() + 2;
+    float y1 = y() + height - 2;
     quad_type_0(writer,
                 {x0, y0, background_depth},
                 {x1, y0, background_depth},
@@ -92,8 +96,10 @@ namespace widget {
 
   void button::draw_label(ta_parameter_writer& writer)
   {
-    float cx = x + width / 2 - (glyph::hori_advance * label_length) / 2;
-    float cy = y + height / 2 - glyph::vert_advance / 2;
+    float y_offset = (float)(click_state != click_type::release);
+
+    float cx = x() + width / 2 - (glyph::hori_advance * label_length) / 2;
+    float cy = y() + height / 2 - glyph::vert_advance / 2 + y_offset;
 
     transfer_string(writer, label, cx, cy, label_depth, label_color);
   }
@@ -115,5 +121,15 @@ namespace widget {
     transfer_global_polygon_glyph(multi.pt);
 
     draw_label(multi.pt);
+
+    widget::draw(multi);
+  }
+
+  void button::click()
+  {
+    if (click_state == click_type::release && on_click != nullptr)
+      on_click();
+
+    widget::click();
   }
 }
diff --git a/src/widget/button.hpp b/src/widget/button.hpp
index 7c1e39d..78e98cf 100644
--- a/src/widget/button.hpp
+++ b/src/widget/button.hpp
@@ -2,7 +2,7 @@
 
 #include "holly/ta_parameter.hpp"
 #include "ta_multiwriter.hpp"
-#include "widget/bounding_box.hpp"
+#include "widget/widget.hpp"
 
 namespace widget {
 
@@ -15,20 +15,34 @@ namespace widget {
     return l;
   }
 
-  struct button : bounding_box {
+  struct button : widget {
     const char * const label;
     const int label_length;
+    void (* const on_click)();
 
-    button(float _x, float _y, float _width, float _height, const char * _label)
-      : bounding_box(_x, _y, _width, _height), label(_label), label_length(str_length(_label))
-    {
-    }
+    inline button(float _width, float _height, const char * _label)
+      : widget(0, 0, _width, _height), label(_label), label_length(str_length(_label)), on_click(nullptr)
+    { }
+
+    inline button(float _width, float _height, const char * _label, void (* const _on_click)())
+      : widget(0, 0, _width, _height), label(_label), label_length(str_length(_label)), on_click(_on_click)
+    { }
+
+    inline button(float _x, float _y, float _width, float _height, const char * _label)
+      : widget(_x, _y, _width, _height), label(_label), label_length(str_length(_label)), on_click(nullptr)
+    { }
+
+    inline button(float _x, float _y, float _width, float _height, const char * _label, void (* const _on_click)())
+      : widget(_x, _y, _width, _height), label(_label), label_length(str_length(_label)), on_click(_on_click)
+    { }
 
     void draw_shadow(ta_parameter_writer& writer);
     void draw_lowlight(ta_parameter_writer& writer);
     void draw_highlight(ta_parameter_writer& writer);
     void draw_background(ta_parameter_writer& writer);
     void draw_label(ta_parameter_writer& writer);
-    void draw(ta_multiwriter& multi);
+    void draw(ta_multiwriter& multi) override;
+
+    void click() override;
   };
 }
diff --git a/src/widget/container.hpp b/src/widget/container.hpp
new file mode 100644
index 0000000..b35af4c
--- /dev/null
+++ b/src/widget/container.hpp
@@ -0,0 +1,47 @@
+#pragma once
+
+#include "printf/printf.h"
+
+namespace widget {
+
+  struct container : widget {
+    widget ** children;
+    int length;
+
+    inline container(float _x, float _y, float _width, float _height,
+                     widget ** _children, int _length)
+      : widget(_x, _y, _width, _height), children(_children), length(_length)
+    {}
+
+    inline void freeze(float _dx, float _dy)
+    {
+      dx = _dx;
+      dy = _dy;
+
+      for (int i = 0; i < length; i++) {
+        children[i]->freeze(x(), y());
+      }
+    }
+
+    void draw(ta_multiwriter& multi)
+    {
+      for (int i = 0; i < length; i++) {
+        children[i]->draw(multi);
+      }
+    }
+
+    inline widget * pick(float _x, float _y)
+    {
+      if (!inside(_x, _y))
+        return nullptr;
+
+      for (int i = 0; i < length; i++) {
+        widget * w = children[i]->pick(_x, _y);
+        if (w != nullptr)
+          return w;
+      }
+
+      return nullptr;
+    }
+  };
+}
diff --git a/src/widget/left_aligned.hpp b/src/widget/left_aligned.hpp
new file mode 100644
index 0000000..4933f91
--- /dev/null
+++ b/src/widget/left_aligned.hpp
@@ -0,0 +1,23 @@
+#pragma once
+
+#include "widget/container.hpp"
+
+namespace widget {
+
+  struct left_aligned : container {
+
+    inline left_aligned(float _x, float _y, float gap, widget ** _children, int _length)
+      : container(_x, _y, 0, 0, _children, _length)
+    {
+      float xi = 0;
+      for (int i = 0; i < length; i++) {
+        children[i]->_x = xi;
+        children[i]->_y = 0;
+        xi += children[i]->width + gap;
+        if (children[i]->height > height)
+          height = children[i]->height;
+      }
+      width = xi;
+    }
+  };
+}
diff --git a/src/widget/top_aligned.hpp b/src/widget/top_aligned.hpp
new file mode 100644
index 0000000..5d4b6c6
--- /dev/null
+++ b/src/widget/top_aligned.hpp
@@ -0,0 +1,23 @@
+#pragma once
+
+#include "widget/container.hpp"
+
+namespace widget {
+
+  struct top_aligned : container {
+
+    inline top_aligned(float _x, float _y, float gap, widget ** _children, int _length)
+      : container(_x, _y, 0, 0, _children, _length)
+    {
+      float yi = 0;
+      for (int i = 0; i < length; i++) {
+        children[i]->_x = 0;
+        children[i]->_y = yi;
+        yi += children[i]->height + gap;
+        if (children[i]->width > width)
+          width = children[i]->width;
+      }
+      height = yi;
+    }
+  };
+}
diff --git a/src/widget/widget.hpp b/src/widget/widget.hpp
new file mode 100644
index 0000000..f6fc10c
--- /dev/null
+++ b/src/widget/widget.hpp
@@ -0,0 +1,50 @@
+#include "widget/bounding_box.hpp"
+#include "ta_multiwriter.hpp"
+
+#include "printf/printf.h"
+
+namespace widget {
+
+  enum class click_type {
+    press,
+    down,
+    release,
+  };
+
+  struct widget : bounding_box {
+  protected:
+    click_type click_state;
+
+  public:
+    inline widget(float _x, float _y, float _width, float _height)
+      : bounding_box(_x, _y, _width, _height), click_state(click_type::release)
+    { }
+
+    inline virtual void draw(ta_multiwriter& multi)
+    {
+      if (click_state == click_type::press)
+        click_state = click_type::down;
+      else if (click_state == click_type::down)
+        click_state = click_type::release;
+    }
+
+    inline virtual void freeze(float _dx, float _dy)
+    {
+      dx = _dx;
+      dy = _dy;
+    }
+
+    inline virtual widget * pick(float _x, float _y)
+    {
+      if (inside(_x, _y))
+        return this;
+      else
+        return nullptr;
+    }
+
+    inline virtual void click()
+    {
+      click_state = click_type::press;
+    }
+  };
+}