243 lines
6.2 KiB
C
243 lines
6.2 KiB
C
#ifndef _PIUMA_GUI_H_
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#define _PIUMA_GUI_H_
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#include "../lib/types.h"
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#include "../lib/math.h"
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#include "../lib/geometry.h"
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#include "../render/2d.h"
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#include "../lib/text.h"
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#include "../lib/event.h"
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#include "../lib/array.h"
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typedef u32 Gui_Id;
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struct Gui_Input
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{
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v2 pointer_position;
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v2 absolute_pointer_position;
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bool mouse_pressed;
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bool mouse_pressed_this_frame;
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bool mouse_released_this_frame;
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s64 text_cursor_move;
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char text[32];
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s32 scroll_move;
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v2 absolute_pointer_position_last_frame;
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};
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enum Gui_Text_Align
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{
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GUI_ALIGN_CENTER,
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GUI_ALIGN_LEFT,
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GUI_ALIGN_RIGHT
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};
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struct Gui_Style
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{
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f32 font_size;
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f32 animation_base_time;
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v4 text_color;
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Gui_Text_Align text_align;
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v4 button_color;
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v4 button_color_hovered;
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v4 button_color_pressed;
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v4 button_text_color;
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v4 button_text_color_hovered;
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v4 button_text_color_pressed;
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f32 button_radius;
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v4 slider_fill_color;
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v4 window_background_color;
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v4 window_border_color;
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v4 window_background_color_inactive;
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v4 window_border_color_inactive;
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f32 window_corner_radius;
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v4 window_titlebar_color;
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v4 window_titlebar_color_inactive;
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f32 scrollbar_size;
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f32 scrollbar_corner_radius;
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f32 scrollbar_inner_bar_size;
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f32 scrollbar_inner_bar_corner_radius;
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v4 scrollbar_color;
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v4 scrollbar_inner_bar_color;
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};
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struct Gui_Window
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{
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Gui_Id id;
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Rect r;
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r_framebuffer framebuffer;
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bool still_open;
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};
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enum Gui_Widget_Status_Flags : u8
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{
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GUI_WIDGET_STATUS_NONE,
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GUI_WIDGET_STATUS_PREVENT_HOT
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};
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struct Gui_Context
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{
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u32 width;
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u32 height;
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f64 last_frame_time;
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f64 current_frame_time;
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Gui_Id active; // Are we interacting with the widget (pressed for buttons, ready to receive text for text inputs)
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Gui_Id hot; // Hovered the previous frame
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Gui_Id possibly_hot; // Might become hot this frame
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f64 active_start_time;
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f64 hot_start_time;
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u8 active_status;
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// Text input state
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u64 text_cursor_position;
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u64 text_length;
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// Windows
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Array<Gui_Window> windows;
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Gui_Window *current_window;
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r_framebuffer *old_framebuffer;
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// Clipping
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Array<Rect> clipping;
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// ID
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Array<Gui_Id> id_stack;
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Gui_Input input;
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Gui_Style style;
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};
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struct Gui_State
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{
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Gui_Context default_context;
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Gui_Context *selected_context;
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};
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extern Gui_State global_gui_state;
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bool gui_init();
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void gui_deinit();
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void gui_context_init(Gui_Context *ctx);
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//@Correctness: gui_context_deinit
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void gui_context_select(Gui_Context *ctx); // Set implicit Gui_Context
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void gui_frame_begin(Gui_Context *ctx, f64 curr_time);
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void gui_frame_begin(f64 curr_time);
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void gui_frame_end(Gui_Context *ctx);
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void gui_frame_end();
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void gui_handle_event(Gui_Context *ctx, Event *e);
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void gui_handle_event(Event *e);
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// ### Widgets ###
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// Text
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void gui_text(Gui_Context *ctx, Rect r, const char *text);
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void gui_text(Rect r, const char *text);
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void gui_text_aligned(Gui_Context *ctx, Rect r, const char *text, Gui_Text_Align alignment);
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void gui_text_aligned(Rect r, const char *text, Gui_Text_Align alignment);
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v2 gui_text_compute_size(Gui_Context *ctx, const char *text);
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v2 gui_text_compute_size(const char *text);
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// Button
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bool gui_button(Gui_Context *ctx, Rect r, const char *text);
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bool gui_button(Rect r, const char *text);
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// @Feature: Buttons with widgets inside
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// Slider
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bool gui_slider_range(Gui_Context *ctx, Rect r, f32 min, f32 max, f32 *value);
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bool gui_slider_range(Rect r, f32 min, f32 max, f32 *value);
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bool gui_slider_text(Gui_Context *ctx, Rect r, f32 *ratio, const char *text); // ratio must be between 0 and 1.
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bool gui_slider_text(Rect r, f32 *ratio, const char *text);
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// @Feature: Checkbox
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// @Feature: Option buttons
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// @Feature: Combo box
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// @Feature: Tooltips
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// Images
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bool gui_image(Gui_Context *ctx, Rect r, r_texture *texture);
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bool gui_image(Rect r, r_texture *texture);
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bool gui_image(Gui_Context *ctx, Rect r, const u8 *bmp, u32 width, u32 height, u32 channels, u32 flags = 0);
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bool gui_image(Rect r, const u8 *bmp, u32 width, u32 height, u32 channels, u32 flags = 0);
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// Text input
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bool gui_text_input(Gui_Context *ctx, Rect r, char *text, u64 max_size);
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bool gui_text_input(Rect r, char *text, u64 max_size);
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// Panels
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void gui_panel(Gui_Context *ctx, Rect r);
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void gui_panel(Rect r);
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// Windows
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struct Gui_Titlebar_State
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{
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v2 move;
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v2 anchor_point;
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bool close;
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};
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struct Gui_Window_Titlebar_State
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{
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Rect inner_r;
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Gui_Titlebar_State titlebar;
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};
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bool gui_window_start(Gui_Context *ctx, Rect r, Gui_Id id); // You have to provide some kind of unique id to identify windows
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bool gui_window_start(Rect r, Gui_Id id);
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bool gui_window_with_titlebar_start(Gui_Context *ctx, Rect r, const char *title, Gui_Window_Titlebar_State *state);
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bool gui_window_with_titlebar_start(Rect r, const char *title, Gui_Window_Titlebar_State *state);
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void gui_window_end(Gui_Context *ctx);
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void gui_window_end();
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// Standalone titlebar for your custom windows
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bool gui_window_titlebar(Gui_Context *ctx, Rect r, const char *title, Gui_Titlebar_State *state);
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bool gui_window_titlebar(Rect r, const char *title, Gui_Titlebar_State *state);
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// @Feature: Panel
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// If you want to change which zone is displayed, change position in displayed_r. size will always be computed from r after removing the scrollbar size
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bool gui_scrollable_area_start(Gui_Context *ctx, Rect r, v2 area_size, Rect *displayed_r);
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bool gui_scrollable_area_start(Rect r, v2 area_size, Rect *displayed_r);
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void gui_scrollable_area_end(Gui_Context *ctx);
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void gui_scrollable_area_end();
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Gui_Window *gui_window_by_id(Gui_Context *ctx, Rect r, Gui_Id id); // Rect r might be needed for creation
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void gui_window_update_rect(Gui_Context *ctx, Gui_Window *window, Rect r);
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// Helpers
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bool gui_is_hovered (Gui_Context *ctx, Gui_Id widget_id, Rect r);
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bool gui_button_behaviuor (Gui_Context *ctx, Gui_Id widget_id, Rect r);
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bool gui_text_input_behaviuor(Gui_Context *ctx, Gui_Id widget_id, Rect r);
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bool gui_window_behaviour (Gui_Context *ctx, Gui_Id widget_id, Rect r);
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Gui_Id gui_id_from_pointer(Gui_Context *ctx, const void* ptr);
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void gui_id_stack_push(Gui_Context *ctx, Gui_Id id);
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void gui_id_stack_pop(Gui_Context *ctx);
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// Clipping
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void gui_clip_start(Gui_Context *ctx, Rect r);
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void gui_clip_end(Gui_Context *ctx);
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bool gui_is_clipped(Gui_Context *ctx, Rect r); // Returns true only if completely clipped
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#endif
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