System info & network

code/gui/gui.h

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+#ifndef _PIUMA_GUI_H_
+#define _PIUMA_GUI_H_
+
+#include "../lib/types.h"
+#include "../lib/math.h"
+#include "../lib/geometry.h"
+#include "../render/2d.h"
+#include "../lib/text.h"
+#include "../lib/event.h"
+
+
+
+typedef u32 Gui_Id;
+
+
+struct Gui_Input
+{
+	v2 pointer_position;
+	v2 absolute_pointer_position;
+	bool mouse_pressed;
+	bool mouse_pressed_this_frame;
+	bool mouse_released_this_frame;
+	s64  text_cursor_move;
+	char text[32];
+
+	v2 absolute_pointer_position_last_frame;
+};
+
+enum Gui_Text_Align
+{
+	GUI_ALIGN_CENTER,
+	GUI_ALIGN_LEFT,
+	GUI_ALIGN_RIGHT
+};
+
+struct Gui_Style
+{
+	f32 font_size;
+	f32 animation_base_time;
+
+	v4 text_color;
+	Gui_Text_Align text_align;
+
+	v4 button_color;
+	v4 button_color_hovered;
+	v4 button_color_pressed;
+	v4 button_text_color;
+	v4 button_text_color_hovered;
+	v4 button_text_color_pressed;
+	f32 button_radius;
+
+	v4 slider_fill_color;
+
+	v4 window_background_color;
+	v4 window_border_color;
+	v4 window_background_color_inactive;
+	v4 window_border_color_inactive;
+	f32 window_corner_radius;
+	v4 window_titlebar_color;
+	v4 window_titlebar_color_inactive;
+};
+
+struct Gui_Window
+{
+	Gui_Id id;
+	Rect r;
+	r_framebuffer framebuffer;
+	bool still_open;
+};
+
+enum Gui_Widget_Status_Flags : u8
+{
+	GUI_WIDGET_STATUS_NONE,
+	GUI_WIDGET_STATUS_PREVENT_HOT
+};
+
+struct Gui_Context
+{
+	u32 width;
+	u32 height;
+
+	f64    last_frame_time;
+	f64 current_frame_time;
+
+	Gui_Id       active; // Are we interacting with the widget (pressed for buttons, ready to receive text for text inputs)
+	Gui_Id          hot; // Hovered the previous frame
+	Gui_Id possibly_hot; // Might become hot this frame
+	f64 active_start_time;
+	f64    hot_start_time;
+	u8 active_status;
+
+	// Text input state
+	u64 text_cursor_position;
+	u64 text_length;
+
+	// Windows
+	Gui_Window *windows;
+	u32 window_count;
+	u32 window_capacity;
+	Gui_Window *current_window;
+	r_framebuffer *old_framebuffer;
+
+	// ID
+	Gui_Id *id_stack;
+	u32 id_count;
+	u32 id_capacity;
+
+	Gui_Input  input;
+	Gui_Style  style;
+};
+
+struct Gui_State
+{
+	Gui_Context   default_context;
+	Gui_Context *selected_context;
+};
+
+
+extern Gui_State global_gui_state;
+
+
+
+
+bool gui_init();
+void gui_deinit();
+
+void gui_context_init(Gui_Context *ctx);
+//@Correctness: gui_context_deinit
+
+void gui_context_select(Gui_Context *ctx); // Set implicit Gui_Context
+
+void gui_frame_begin(Gui_Context *ctx, f64 curr_time);
+void gui_frame_begin(f64 curr_time);
+void gui_frame_end(Gui_Context *ctx);
+void gui_frame_end();
+
+void gui_handle_event(Gui_Context *ctx, Event *e);
+void gui_handle_event(Event *e);
+
+// ### Widgets ###
+// Text
+void gui_text(Gui_Context *ctx, Rect r, const char *text);
+void gui_text(Rect r, const char *text);
+void gui_text_aligned(Gui_Context *ctx, Rect r, const char *text, Gui_Text_Align alignment);
+void gui_text_aligned(Rect r, const char *text, Gui_Text_Align alignment);
+
+v2 gui_text_compute_size(Gui_Context *ctx, const char *text);
+v2 gui_text_compute_size(const char *text);
+
+// Button
+bool gui_button(Gui_Context *ctx, Rect r, const char *text);
+bool gui_button(Rect r, const char *text);
+
+// Slider
+bool gui_slider(Gui_Context *ctx, Rect r, f32 min, f32 max, f32 *value);
+bool gui_slider(Rect r, f32 min, f32 max, f32 *value);
+
+// Checkbox
+// Option buttons
+// Combo box
+// Tooltips
+
+// Images
+bool gui_image(Gui_Context *ctx, Rect r, r_texture *texture);
+bool gui_image(Rect r, r_texture *texture);
+bool gui_image(Gui_Context *ctx, Rect r, const u8 *bmp, u32 width, u32 height, u32 channels, u32 flags = 0);
+bool gui_image(Rect r, const u8 *bmp, u32 width, u32 height, u32 channels, u32 flags = 0);
+
+// Text input
+bool gui_text_input(Gui_Context *ctx, Rect r, char *text, u64 max_size);
+bool gui_text_input(Rect r, char *text, u64 max_size);
+
+// Windows
+bool gui_window_start(Gui_Context *ctx, Rect r, Gui_Id id); // You have to provide some kind of unique id to identify windows
+bool gui_window_start(Rect r, Gui_Id id);
+void gui_window_end(Gui_Context *ctx);
+void gui_window_end();
+
+bool gui_window_titlebar(Gui_Context *ctx, Rect r, const char *title, bool *close, v2 *move);
+bool gui_window_titlebar(Rect r, const char *title, bool *close, v2 *move);
+
+Gui_Window *gui_window_by_id(Gui_Context *ctx, Rect r, Gui_Id id); // Rect r might be needed for creation
+void gui_window_update_rect(Gui_Context *ctx, Gui_Window *window, Rect r);
+
+// Helpers
+bool gui_is_hovered          (Gui_Context *ctx, Gui_Id widget_id, Rect r);
+bool gui_button_behaviuor    (Gui_Context *ctx, Gui_Id widget_id, Rect r);
+bool gui_text_input_behaviuor(Gui_Context *ctx, Gui_Id widget_id, Rect r);
+bool gui_window_behaviour    (Gui_Context *ctx, Gui_Id widget_id, Rect r);
+
+Gui_Id gui_id_from_pointer(Gui_Context *ctx, const void* ptr);
+void gui_id_stack_push(Gui_Context *ctx, Gui_Id id);
+void gui_id_stack_pop(Gui_Context *ctx);
+
+#endif