implement in-game popups

1 files changed, 68 insertions, 0 deletions

diff --git a/lib/nes/app/ui/screen-confirm-quit.cc b/lib/nes/app/ui/screen-confirm-quit.cc
new file mode 100644
index 0000000..3c7a337
--- /dev/null
+++ b/lib/nes/app/ui/screen-confirm-quit.cc
@@ -0,0 +1,68 @@
+#include "nes/app/ui/screen-confirm-quit.hh"
+#include "nes/app/graphics/renderer.hh"
+#include "nes/app/graphics/color.hh"
+#include "nes/app/input/input-device-keyboard.hh"
+
+namespace nes::app
+{
+	screen_confirm_quit::screen_confirm_quit(input_device_keyboard& keyboard)
+		: keyboard_{ keyboard }
+	{
+	}
+
+	auto screen_confirm_quit::render(renderer& renderer) -> void
+	{
+		renderer.render_rect(2, 8, 28, 10, color::background_secondary);
+		renderer.render_border(2, 8, 28, 10, color::foreground_primary);
+
+		auto const attrs = text_attributes{}
+			.set_alignment(text_alignment::center)
+			.set_ellipsize_mode(ellipsize_mode::end)
+			.set_max_width(26);
+		renderer.render_text(16, 10, "Are you sure?", color::foreground_primary, attrs);
+		renderer.render_text(16, 12, "All progress is lost.", color::foreground_primary, attrs);
+		if (confirm_)
+		{
+			renderer.render_text(10, 15, "Cancel", color::foreground_secondary);
+			renderer.render_text(18, 15, "> OK <", color::accent_primary);
+		}
+		else
+		{
+			renderer.render_text(8, 15, "> Cancel <", color::accent_primary);
+			renderer.render_text(20, 15, "OK", color::foreground_secondary);
+		}
+	}
+
+	auto screen_confirm_quit::process_events() -> action
+	{
+		while (auto const event = keyboard_.poll_event())
+		{
+			// Use key-up so the enter key is not immediately captured by the game.
+			if (event == input_event::key_up(key::enter))
+			{
+				if (confirm_)
+				{
+					return action::confirm_quit();
+				}
+				else
+				{
+					return action::cancel_quit();
+				}
+			}
+			else if (event == input_event::key_down(key::space))
+			{
+				confirm_ = !confirm_;
+			}
+			else if (event == input_event::key_down(key::arrow_left))
+			{
+				confirm_ = false;
+			}
+			else if (event == input_event::key_down(key::arrow_right))
+			{
+				confirm_ = true;
+			}
+		}
+
+		return action{};
+	}
+} // namespace nes::app
\ No newline at end of file