more raleigh, including button and vbox widgets

18 files changed, 336 insertions, 58 deletions

diff --git a/src/user/include/cxx/raleigh/util.h b/src/user/include/cxx/raleigh/util.h
index d2ed13d..9142b69 100644
--- a/src/user/include/cxx/raleigh/util.h
+++ b/src/user/include/cxx/raleigh/util.h
@@ -5,11 +5,15 @@
 
 #define RGB(R, G, B) ((_pixel_t){.r = 0x##R, .g = 0x##G, .b = 0x##B})
 
-struct coord {
-  uint32_t x;
-  uint32_t y;
-  coord(uint32_t x, uint32_t y);
-  coord();
-};
+namespace raleigh {
+  struct coord {
+    uint32_t x;
+    uint32_t y;
+    coord(uint32_t x, uint32_t y);
+    coord();
+  };
+
+  void show_error_and_quitf(const char *fmt, ...) __attribute__ ((noreturn));
+}
 
 #endif
\ No newline at end of file
diff --git a/src/user/include/cxx/raleigh/w/button.h b/src/user/include/cxx/raleigh/w/button.h
new file mode 100644
index 0000000..1847cf1
--- /dev/null
+++ b/src/user/include/cxx/raleigh/w/button.h
@@ -0,0 +1,26 @@
+#ifndef RALEIGH_W_BUTTON_H
+#define RALEIGH_W_BUTTON_H
+
+#include <raleigh/widget.h>
+
+namespace raleigh {
+  class button : public widget {
+  public:
+    button(widget &inner, void (*on_click)(button &), _pixel_t border_color=RGB(00, 00, 00),
+      _pixel_t bg_color=RGB(bf, bf, bf), _pixel_t pressed_color=RGB(9f, 9f, 9f));
+
+    void notify_window_change() override;
+    void paint(_pixel_t *pixbuf, uint32_t pitch) override;
+    bool try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) override;
+    void notify_has_opaque_parent(widget *parent) override;
+  private:
+    widget &inner;
+    void (*on_click)(button &);
+    _pixel_t border_color;
+    _pixel_t bg_color;
+    _pixel_t pressed_color;
+    bool is_pressed;
+  };
+}
+
+#endif
\ No newline at end of file
diff --git a/src/user/include/cxx/raleigh/w/label.h b/src/user/include/cxx/raleigh/w/label.h
index 51bf541..d133841 100644
--- a/src/user/include/cxx/raleigh/w/label.h
+++ b/src/user/include/cxx/raleigh/w/label.h
@@ -8,16 +8,19 @@ namespace raleigh {
   class label : public widget {
   public:
     //this pointer is used directly, and the contents of the string should not be changed afterward
-    label(const char *value, const char *font="fixed-10",
-      _pixel_t bg=RGB(bf, bf, bf), _pixel_t fg=RGB(00, 00, 00));
+    label(const char *value, const char *font="fixed-10", bool bg_transparent=true,
+      _pixel_t fg=RGB(00, 00, 00), _pixel_t bg=RGB(bf, bf, bf));
 
     void notify_window_change() override;
     void paint(_pixel_t *pixbuf, uint32_t pitch) override;
+    bool try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) override __attribute__ ((const));
+    void notify_has_opaque_parent(widget *parent) override;
   private:
     const char *const value;
     const struct font_info *const fi;
-    const _pixel_t bg;
+    bool bg_transparent;
     const _pixel_t fg;
+    const _pixel_t bg;
   };
 }
 
diff --git a/src/user/include/cxx/raleigh/w/padding.h b/src/user/include/cxx/raleigh/w/padding.h
index 108cd28..216b984 100644
--- a/src/user/include/cxx/raleigh/w/padding.h
+++ b/src/user/include/cxx/raleigh/w/padding.h
@@ -6,14 +6,15 @@
 namespace raleigh {
   class padding : public widget {
   public:
-    padding(uint32_t pad_by, _pixel_t color, widget &inner);
+    padding(widget &inner, uint32_t pad_by);
 
     void notify_window_change() override;
     void paint(_pixel_t *pixbuf, uint32_t pitch) override;
+    bool try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) override;
+    void notify_has_opaque_parent(widget *parent) override;
   private:
-    uint32_t pad_by;
-    _pixel_t color;
     widget &inner;
+    uint32_t pad_by;
   };
 }
 
diff --git a/src/user/include/cxx/raleigh/w/vbox.h b/src/user/include/cxx/raleigh/w/vbox.h
new file mode 100644
index 0000000..aead128
--- /dev/null
+++ b/src/user/include/cxx/raleigh/w/vbox.h
@@ -0,0 +1,22 @@
+#ifndef RALEIGH_W_VBOX_H
+#define RALEIGH_W_VBOX_H
+
+#include <raleigh/widget.h>
+#include <structs/dllist.h>
+
+namespace raleigh {
+  class vbox : public widget {
+  public:
+    //do not modify this list afterward
+    vbox(dllist<widget &> widgets);
+
+    void notify_window_change() override;
+    void paint(_pixel_t *pixbuf, uint32_t pitch) override;
+    bool try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) override;
+    void notify_has_opaque_parent(widget *parent) override;
+  private:
+    dllist<widget &> widgets;
+  };
+}
+
+#endif
\ No newline at end of file
diff --git a/src/user/include/cxx/raleigh/widget.h b/src/user/include/cxx/raleigh/widget.h
index 1839333..de6c5a4 100644
--- a/src/user/include/cxx/raleigh/widget.h
+++ b/src/user/include/cxx/raleigh/widget.h
@@ -18,9 +18,18 @@ namespace raleigh {
     window *w;
     coord window_offset;
 
+    //fewest steps up that a widget can be redrawn without needing its parents
+    //if a widget is opaque, it will set this to a pointer to itself, and then call
+    //  notify_has_opaque_parent on any children, passing itself as an argument.
+    //in notify_has_opaque_parent's handler, it should set this if it isn't already set,
+    //  and then call notify_has_opaque_parent on any children (with the opaque parent).
+    widget *closest_opaque;
+
     //called by window class (or parent widget)
     virtual void notify_window_change() = 0;
     virtual void paint(_pixel_t *pixbuf, uint32_t pitch) = 0;
+    virtual bool try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) = 0;
+    virtual void notify_has_opaque_parent(widget *parent) = 0;
   };
 }
 
diff --git a/src/user/include/cxx/raleigh/window.h b/src/user/include/cxx/raleigh/window.h
index 7e45e22..f82f9a9 100644
--- a/src/user/include/cxx/raleigh/window.h
+++ b/src/user/include/cxx/raleigh/window.h
@@ -5,22 +5,30 @@ namespace raleigh {
   class window;
 }
 
+#include <raleigh/runtime.h>
 #include <raleigh/widget.h>
 #include <pland/syscall.h>
 #include <raleigh/util.h>
 
 namespace raleigh {
   class window {
+    friend void start_runtime();
   public:
-    window(widget &root);
+    //pass on_close to specify a close handler. if on_close returns false, the window will not be closed.
+    window(widget &root, _pixel_t bg_color=RGB(bf, bf, bf), bool (*on_close)(window &)=0);
     void notify_needs_paint(widget &from);
     enum try_actions_return_t {NONE, GOOD, DELETE};
     try_actions_return_t try_actions();
+    void show();
   private:
     _window_handle_t handle;
     _pixel_t *pixbuf;
     coord size;
     widget &root;
+    _pixel_t bg_color;
+    bool needs_repaint;
+    void paint_full();
+    bool (*on_close)(window &);
   };
 }
 
diff --git a/src/user/include/libfont/fonts.h b/src/user/include/libfont/fonts.h
index 629ed5a..8c0e949 100644
--- a/src/user/include/libfont/fonts.h
+++ b/src/user/include/libfont/fonts.h
@@ -25,6 +25,9 @@ struct font_info *get_font(const char *name);
 //pitch is in pixels
 void put_char(const struct font_info *font, char ch, _pixel_t *pb_ptr, uint32_t pb_pitch, _pixel_t bg, _pixel_t fg);
 
+//pitch is in pixels
+void put_char_no_bg(const struct font_info *font, char ch, _pixel_t *pb_ptr, uint32_t pb_pitch, _pixel_t fg);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/user/include/popups/info.h b/src/user/include/popups/info.h
index 36d557a..de6be57 100644
--- a/src/user/include/popups/info.h
+++ b/src/user/include/popups/info.h
@@ -1,6 +1,10 @@
 #ifndef POPUPS_INFO_H
 #define POPUPS_INFO_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <popups/popup.h>
 
 #include <pland/syscall.h>
@@ -11,4 +15,8 @@ void info_popup(struct popup *into, const char *text, _pixel_t fg, _pixel_t bg);
 void info_popupf(struct popup *into, const char *text, _pixel_t fg, _pixel_t bg, ...);
 void info_popupf_v(struct popup *into, const char *text, _pixel_t fg, _pixel_t bg, va_list args);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
\ No newline at end of file
diff --git a/src/user/libfont/fonts.c b/src/user/libfont/fonts.c
index 51e127b..d63a5d9 100644
--- a/src/user/libfont/fonts.c
+++ b/src/user/libfont/fonts.c
@@ -58,11 +58,17 @@ struct font_info *get_font(const char *name) {
 
 //pitch is in pixels
 void put_char(const struct font_info *font, char ch, _pixel_t *pb_ptr, uint32_t pb_pitch, _pixel_t bg, _pixel_t fg) {
-//char *const msg = format("put_char(font = 0x%x, ch = '%c', pb_ptr = 0x%x, pb_pitch = %u, bg = 0x%2x, fg = 0x%2x);", font, ch, pb_ptr, pb_pitch, bg, fg);
-//_system_log(msg);
-//free_block(msg);
   const bool *const bitmap = font->bitmaps[(uint8_t)ch] ? font->bitmaps[(uint8_t)ch] : font->bitmaps[0];
   for (uint32_t y = 0; y < font->char_height; ++y)
     for (uint32_t x = 0; x < font->char_width; ++x)
       pb_ptr[y * pb_pitch + x] = bitmap[y * font->char_width + x] ? fg : bg;
+}
+
+//pitch is in pixels
+void put_char_no_bg(const struct font_info *font, char ch, _pixel_t *pb_ptr, uint32_t pb_pitch, _pixel_t fg) {
+  const bool *const bitmap = font->bitmaps[(uint8_t)ch] ? font->bitmaps[(uint8_t)ch] : font->bitmaps[0];
+  for (uint32_t y = 0; y < font->char_height; ++y)
+    for (uint32_t x = 0; x < font->char_width; ++x)
+      if (bitmap[y * font->char_width + x])
+        pb_ptr[y * pb_pitch + x] = fg;
 }
\ No newline at end of file
diff --git a/src/user/raleigh/runtime.cpp b/src/user/raleigh/runtime.cpp
index 1152575..6dafed1 100644
--- a/src/user/raleigh/runtime.cpp
+++ b/src/user/raleigh/runtime.cpp
@@ -11,9 +11,12 @@ namespace raleigh {
       if (!open_windows.first)
         __pcrt_quit();
       for (dllist<window &>::node *w = open_windows.first; w; w = w->next)
-        if (w->d.try_actions() == window::DELETE)
+        if (w->d.try_actions() == window::DELETE) {
+          _delete_window(w->d.handle);
+          w->d.handle = 0;
           if (!(w = open_windows.remove_in_place(w)))
             break;
+        }
       _wait_for_action();
       _yield_task();
     }
diff --git a/src/user/raleigh/util.cpp b/src/user/raleigh/util.cpp
index 958897b..db0982b 100644
--- a/src/user/raleigh/util.cpp
+++ b/src/user/raleigh/util.cpp
@@ -1,6 +1,22 @@
 #include <raleigh/util.h>
+#include <popups/info.h>
+#include <pland/pcrt.h>
 
-coord::coord(uint32_t x, uint32_t y)
-  : x(x), y(y) {}
-coord::coord()
-  : x(0), y(0) {}
\ No newline at end of file
+namespace raleigh {
+  coord::coord(uint32_t x, uint32_t y)
+    : x(x), y(y) {}
+  coord::coord()
+    : x(0), y(0) {}
+
+  __attribute__ ((noreturn))
+  void show_error_and_quitf(const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+
+    struct popup info;
+    info_popupf_v(&info, fmt, RGB(7f, 00, 00), RGB(bf, bf, bf), args);
+    make_modal(&info);
+
+    __pcrt_quit();
+  }
+}
\ No newline at end of file
diff --git a/src/user/raleigh/w/button.cpp b/src/user/raleigh/w/button.cpp
new file mode 100644
index 0000000..06d9c1d
--- /dev/null
+++ b/src/user/raleigh/w/button.cpp
@@ -0,0 +1,54 @@
+#include <raleigh/w/button.h>
+
+namespace raleigh {
+  button::button(widget &inner, void (*on_click)(button &),
+    _pixel_t border_color, _pixel_t bg_color, _pixel_t pressed_color)
+    : inner(inner), on_click(on_click), border_color(border_color),
+      bg_color(bg_color), pressed_color(pressed_color), is_pressed(false) {
+    size = coord(inner.size.x + 2, inner.size.y + 2);
+    closest_opaque = this;
+    inner.notify_has_opaque_parent(this);
+  }
+
+  void button::notify_window_change() {
+    inner.window_offset = coord(window_offset.x + 1, window_offset.y + 1);
+    inner.w = w;
+    inner.notify_window_change();
+  }
+
+  void button::paint(_pixel_t *pixbuf, uint32_t pitch) {
+    for (uint32_t y = window_offset.y + 1; y < window_offset.y + size.y - 1; ++y)
+      for (uint32_t x = window_offset.x + 1; x < window_offset.x + size.x - 1; ++x)
+        pixbuf[y * pitch + x] = is_pressed ? pressed_color : bg_color;
+    inner.paint(pixbuf, pitch);
+    for (uint32_t x = window_offset.x; x < window_offset.x + size.x; ++x) {
+      pixbuf[window_offset.y * pitch + x] = border_color;
+      pixbuf[(window_offset.y + size.y - 1) * pitch + x] = border_color;
+    }
+    for (uint32_t y = window_offset.y + 1; y < window_offset.y + size.y - 1; ++y) {
+      pixbuf[y * pitch + window_offset.x] = border_color;
+      pixbuf[y * pitch + window_offset.x + size.x - 1] = border_color;
+    }
+  }
+
+  bool button::try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) {
+    if (click_type != mouse_packet::LEFT)
+      return false;
+    if (up) {
+      is_pressed = false;
+      inner.window_offset = coord(window_offset.x + 1, window_offset.y + 1);
+      inner.notify_window_change();
+      w->notify_needs_paint(*this);
+      on_click(*this);
+    }
+    else {
+      is_pressed = true;
+      inner.window_offset = coord(window_offset.x + 2, window_offset.y + 2);
+      inner.notify_window_change();
+      w->notify_needs_paint(*this);
+    }
+    return true;
+  }
+
+  void button::notify_has_opaque_parent(widget *parent) {}
+}
\ No newline at end of file
diff --git a/src/user/raleigh/w/label.cpp b/src/user/raleigh/w/label.cpp
index 047126d..5b74175 100644
--- a/src/user/raleigh/w/label.cpp
+++ b/src/user/raleigh/w/label.cpp
@@ -3,25 +3,32 @@
 #include <knob/block.h>
 
 namespace raleigh {
-  label::label(const char *value, const char *font, _pixel_t bg, _pixel_t fg)
-    : value(value), fi(get_font(font)), bg(bg), fg(fg) {
-    size = coord(
-      fi->space_width * (strlen(value) - 1) + fi->char_width,
-      fi->char_height
-    );
+  label::label(const char *value, const char *font, bool bg_transparent, _pixel_t fg, _pixel_t bg)
+    : value(value), fi(get_font(font)), bg_transparent(bg_transparent), fg(fg), bg(bg) {
+    size = coord(fi->space_width * (strlen(value) - 1) + fi->char_width, fi->char_height);
+    closest_opaque = 0;
   }
 
   void label::notify_window_change() {}
 
   void label::paint(_pixel_t *pixbuf, uint32_t pitch) {
-    for (uint32_t y = window_offset.y; y < window_offset.y + size.y; ++y)
-      for (uint32_t x = window_offset.x; x < window_offset.x + size.x; ++x)
-        pixbuf[y * pitch + x] = bg;
-
+    if (!bg_transparent)
+      for (uint32_t y = window_offset.y; y < window_offset.y + size.y; ++y)
+        for (uint32_t x = window_offset.x; x < window_offset.x + size.x; ++x)
+          pixbuf[y * pitch + x] = bg;
     _pixel_t *ptr = pixbuf + window_offset.y * pitch + window_offset.x;
     for (const char *c = value; *c; ++c) {
-      put_char(fi, *c, ptr, pitch, bg, fg);
+      put_char_no_bg(fi, *c, ptr, pitch, fg);
       ptr += fi->space_width;
     }
   }
+
+  __attribute__ ((const))
+  bool label::try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) {
+    return false;
+  }
+
+  void label::notify_has_opaque_parent(widget *parent) {
+    closest_opaque = parent;
+  }
 }
\ No newline at end of file
diff --git a/src/user/raleigh/w/padding.cpp b/src/user/raleigh/w/padding.cpp
index 6833c5d..3dd027b 100644
--- a/src/user/raleigh/w/padding.cpp
+++ b/src/user/raleigh/w/padding.cpp
@@ -1,9 +1,10 @@
 #include <raleigh/w/padding.h>
 
 namespace raleigh {
-  padding::padding(uint32_t pad_by, _pixel_t color, widget &inner)
-    : pad_by(pad_by), color(color), inner(inner) {
+  padding::padding(widget &inner, uint32_t pad_by)
+    : inner(inner), pad_by(pad_by) {
     size = coord(inner.size.x + pad_by * 2, inner.size.y + pad_by * 2);
+    closest_opaque = 0;
   }
 
   void padding::notify_window_change() {
@@ -13,19 +14,18 @@ namespace raleigh {
   }
 
   void padding::paint(_pixel_t *pixbuf, uint32_t pitch) {
-    for (uint32_t y = window_offset.y; y < window_offset.y + pad_by; ++y)
-      for (uint32_t x = window_offset.x; x < window_offset.x + size.x; ++x)
-        pixbuf[y * pitch + x] = color;
-    for (uint32_t y = window_offset.y + size.y - pad_by; y < window_offset.y + size.y; ++y)
-      for (uint32_t x = window_offset.x; x < window_offset.x + size.x; ++x)
-        pixbuf[y * pitch + x] = color;
-    for (uint32_t y = window_offset.y + pad_by; y < window_offset.y + size.y - pad_by; ++y) {
-      for (uint32_t x = window_offset.x; x < window_offset.x + pad_by; ++x)
-        pixbuf[y * pitch + x] = color;
-      for (uint32_t x = window_offset.x + size.x - pad_by; x < window_offset.x + size.x; ++x)
-        pixbuf[y * pitch + x] = color;
-    }
-
     inner.paint(pixbuf, pitch);
   }
+
+  bool padding::try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) {
+    return (window_coords.x >= inner.window_offset.x) &&
+           (window_coords.y >= inner.window_offset.y) &&
+           (window_coords.x < inner.window_offset.x + inner.size.x) &&
+           (window_coords.y < inner.window_offset.y + inner.size.y) &&
+            inner.try_handle_click(window_coords, click_type, up);
+  }
+
+  void padding::notify_has_opaque_parent(widget *parent) {
+    closest_opaque = parent;
+  }
 }
\ No newline at end of file
diff --git a/src/user/raleigh/w/vbox.cpp b/src/user/raleigh/w/vbox.cpp
new file mode 100644
index 0000000..30b0902
--- /dev/null
+++ b/src/user/raleigh/w/vbox.cpp
@@ -0,0 +1,45 @@
+#include <raleigh/w/vbox.h>
+
+namespace raleigh {
+  vbox::vbox(dllist<widget &> widgets) : widgets(widgets) {
+    uint32_t w = 0, h = 0;
+    for (dllist<widget &>::node *n = widgets.first; n; n = n->next) {
+      h += n->d.size.y;
+      if (n->d.size.x > w)
+        w = n->d.size.x;
+    }
+    size = coord(w, h);
+    closest_opaque = 0;
+  }
+
+  void vbox::notify_window_change() {
+    uint32_t h = window_offset.y;
+    for (dllist<widget &>::node *n = widgets.first; n; n = n->next) {
+      n->d.w = w;
+      n->d.window_offset = coord(window_offset.x + size.x / 2 - n->d.size.x / 2, h);
+      n->d.notify_window_change();
+      h += n->d.size.y;
+    }
+  }
+
+  void vbox::paint(_pixel_t *pixbuf, uint32_t pitch) {
+    for (dllist<widget &>::node *n = widgets.first; n; n = n->next)
+      n->d.paint(pixbuf, pitch);
+  }
+
+  bool vbox::try_handle_click(coord window_coords, enum mouse_packet::mouse_button click_type, bool up) {
+    uint32_t h = window_offset.y;
+    dllist<widget &>::node *n = widgets.first;
+    while (h + n->d.size.y <= window_coords.y) {
+      h += n->d.size.y;
+      n = n->next;
+    }
+    return (window_coords.x >= n->d.window_offset.x) &&
+           (window_coords.x < n->d.window_offset.x + n->d.size.x) &&
+            n->d.try_handle_click(window_coords, click_type, up);
+  }
+
+  void vbox::notify_has_opaque_parent(widget *parent) {
+    closest_opaque = parent;
+  }
+}
\ No newline at end of file
diff --git a/src/user/raleigh/window.cpp b/src/user/raleigh/window.cpp
index 4373b06..41eb9ce 100644
--- a/src/user/raleigh/window.cpp
+++ b/src/user/raleigh/window.cpp
@@ -1,20 +1,21 @@
 #include <raleigh/runtime.h>
 #include <raleigh/window.h>
+#include <popups/info.h>
 #include <knob/heap.h>
 
 namespace raleigh {
-  window::window(widget &root)
-    : size(root.size), root(root) {
+  window::window(widget &root, _pixel_t bg_color, bool (*on_close)(window &))
+    : handle(0), size(root.size), root(root), bg_color(bg_color),
+      needs_repaint(false), on_close(on_close) {
     root.w = this;
     root.window_offset = coord(0, 0);
     root.notify_window_change();
 
     pixbuf = (_pixel_t *)get_block(size.x * size.y * sizeof(_pixel_t));
+    if (!pixbuf)
+      show_error_and_quitf("Failed to create %d byte pixel buffer\nfor requested %dx%d pixel window.", size.x * size.y * sizeof(_pixel_t), size.x, size.y);
 
-    root.paint(pixbuf, size.x);
-    handle = _new_window(size.x, size.y, pixbuf);
-
-    open_windows.add_front(*this);
+    paint_full();
   }
 
   window::try_actions_return_t window::try_actions() {
@@ -22,14 +23,46 @@ namespace raleigh {
     window::try_actions_return_t got = NONE;
     while (1) {
       _get_win_action(handle, &wa);
-      if (!wa.action_type)
+      if (!wa.action_type) {
+        if (needs_repaint) {
+          needs_repaint = false;
+          _paint_window(handle);
+        }
         return got;
+      }
       if ((wa.action_type == wa.KEY_DOWN) &&
           (wa.as_key.modifiers & wa.as_key.ALTS) &&
           (wa.as_key.key_id == wa.as_key.KEY_F4))
-        return DELETE;
+        if (!on_close || on_close(*this))
+          return DELETE;
       got = GOOD;
-      //TODO
+      if (wa.action_type == wa.MOUSE_DOWN)
+        root.try_handle_click(coord(wa.as_mouse.x, wa.as_mouse.y), wa.as_mouse.which, false);
+      if (wa.action_type == wa.MOUSE_UP)
+        root.try_handle_click(coord(wa.as_mouse.x, wa.as_mouse.y), wa.as_mouse.which, true);
     }
   }
+
+  void window::notify_needs_paint(widget &head) {
+    if (head.closest_opaque)
+      head.closest_opaque->paint(pixbuf, size.x);
+    else
+      paint_full();
+    needs_repaint = true;
+  }
+
+  void window::paint_full() {
+    for (uint32_t i = 0; i < size.x * size.y; ++i)
+      pixbuf[i] = bg_color;
+    root.paint(pixbuf, size.x);
+  }
+
+  void window::show() {
+    if (handle)
+      return;
+    handle = _new_window(size.x, size.y, pixbuf);
+    if (!handle)
+      show_error_and_quitf("Failed to get window handle for requested window.");
+    open_windows.add_front(*this);
+  }
 }
\ No newline at end of file
diff --git a/src/user/rhello/main.cpp b/src/user/rhello/main.cpp
index 750818c..c92b430 100644
--- a/src/user/rhello/main.cpp
+++ b/src/user/rhello/main.cpp
@@ -1,13 +1,43 @@
 #include <raleigh/w/padding.h>
+#include <raleigh/w/button.h>
 #include <raleigh/w/label.h>
+#include <raleigh/w/vbox.h>
+
 #include <raleigh/runtime.h>
 #include <raleigh/window.h>
 
+#include <popups/info.h>
+#include <pland/pcrt.h>
+
 using namespace raleigh;
 
+window *p_w;
+
+void onclick(button &from) {
+  p_w->show();
+}
+
 void main() {
   label l("Hello, world! Close me with Alt+F4.");
-  padding p(4, RGB(bf, bf, bf), l);
-  window w(p);
+  padding pl(l, 2);
+
+  label bl("Click me!");
+  padding pbl(bl, 4);
+  button b(pbl, &onclick);
+  padding pb(b, 2);
+
+  dllist<widget &> wl;
+  wl.add_front(pb);
+  wl.add_front(pl);
+  vbox vb(wl);
+  padding pvb(vb, 2);
+
+  window w(pvb, RGB(bf, bf, bf), (bool (*)(window &))&__pcrt_quit);
+
+  label p_l("You clicked that button!");
+  padding p_pl(p_l, 4);
+  p_w = new window(p_pl);
+
+  w.show();
   start_runtime();
 }
\ No newline at end of file