initial commit

1 files changed, 205 insertions, 0 deletions

diff --git a/src/ui.h b/src/ui.h
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+/* 
+*  BSD 2-Clause “Simplified” License
+*  Copyright (c) 2019, Aldrik Ramaekers, aldrik.ramaekers@protonmail.com
+*  All rights reserved.
+*/
+
+#ifndef INCLUDE_UI
+#define INCLUDE_UI
+
+#define BLOCK_HEIGHT 25
+#define MENU_BAR_HEIGHT 25
+#define MENU_HORIZONTAL_PADDING 10
+#define WIDGET_PADDING 8
+#define BUTTON_HORIZONTAL_TEXT_PADDING 15
+#define MENU_ITEM_WIDTH 220
+#define CHECKBOX_SIZE BLOCK_HEIGHT - 8
+#define TEXTBOX_WIDTH 280
+#define TEXTBOX_HEIGHT BLOCK_HEIGHT
+#define BUTTON_HEIGHT BLOCK_HEIGHT
+#define BUTTON_IMAGE_PADDING 5
+#define BUTTON_IMAGE_SPACING 8
+#define DROPDOWN_WIDTH 225
+#define DROPDOWN_ITEM_WIDTH 225
+#define TEXTBOX_SCROLL_X_SPEED 32
+
+typedef enum t_ui_style_type
+{
+	UI_STYLE_LIGHT = 1,
+	UI_STYLE_DARK = 2,
+} ui_style_type;
+
+typedef struct t_ui_style
+{
+	u16 id;
+	color foreground;
+	color background;
+	color border;
+	color textbox_background;
+	color textbox_active_border;
+	color textbox_foreground;
+	color image_outline_tint;
+	color scrollbar_handle_background;
+	color info_bar_background;
+	color error_foreground;
+	color item_hover_background;
+	color scrollbar_background;
+	color menu_background;
+	color menu_hover_background;
+	color menu_foreground;
+	color widget_hover_background;
+	color widget_background;
+	color hypertext_foreground;
+	color hypertext_hover_foreground;
+	color textbox_placeholder_foreground;
+} ui_style;
+
+typedef enum t_layout_direction
+{
+	LAYOUT_HORIZONTAL,
+	LAYOUT_VERTICAL,
+} layout_direction;
+
+typedef struct t_dropdown_state
+{
+	bool state;
+	int selected_index;
+} dropdown_state;
+
+typedef struct t_scroll_state
+{
+	s32 height;
+	s32 scroll;
+	s32 scroll_start_offset_y;
+	bool in_scroll;
+} scroll_state;
+
+typedef struct t_ui_layout
+{
+	s32 dropdown_item_count;
+	s32 dropdown_x;
+	s32 offset_x;
+	s32 offset_y;
+	platform_window *active_window;
+	layout_direction layout_direction;
+	s32 prev_offset_x;
+	s32 width;
+	s32 height;
+	s32 menu_offset_y;
+	s32 block_height;
+	s32 start_offset_y;
+	s32 start_offset_x;
+	scroll_state *scroll;
+	s32 padding;
+	dropdown_state *active_dropdown_state;
+} ui_layout;
+
+typedef struct t_textbox_history_entry
+{
+	char *text;
+	s32 cursor_offset;
+} textbox_history_entry;
+
+typedef struct t_textbox_state
+{
+	bool deselect_on_enter;
+	char *buffer;
+	s32 selection_start_index;
+	bool state;
+	s32 diff;
+	bool double_clicked_to_select;
+	s32 double_clicked_to_select_cursor_index;
+	s32 max_len;
+	s32 text_offset_x;
+	bool attempting_to_select;
+	array history;
+	array future;
+	s32 last_click_cursor_index;
+} textbox_state;
+
+typedef struct t_checkbox_state
+{
+	bool state;
+} checkbox_state;
+
+typedef struct t_button_state
+{
+	bool state;
+} button_state;
+
+typedef struct t_ui_context
+{
+	ui_style style;
+	ui_layout layout;
+	keyboard_input *keyboard;
+	mouse_input *mouse;
+	camera *camera;
+	font *font_small;
+	array active_menus;
+	u32 next_id;
+	s32 menu_item_count;
+	dropdown_state *active_dropdown;
+	textbox_state *current_active_textbox;
+	bool item_hovered;
+} ui_context;
+
+///// our global ui states ////
+checkbox_state checkbox_recursive;
+textbox_state textbox_search_text;
+textbox_state textbox_path;
+textbox_state textbox_file_filter;
+button_state button_select_directory;
+button_state button_find_text;
+button_state button_cancel;
+///////////////////////////////
+
+ui_context global_ui_context;
+
+u32 ui_get_id();
+void ui_create(platform_window *window, keyboard_input *keyboard, mouse_input *mouse, camera *camera, font *font_small);
+void ui_set_active_window(platform_window *window);
+void ui_destroy();
+void ui_begin();
+void ui_end();
+bool ui_is_menu_active(u32 id);
+char* name_of_day(s32 day);
+char* name_of_month(s32 month);
+void ui_set_style(u16 style);
+void set_active_textbox(textbox_state *textbox);
+
+// widget initialization
+checkbox_state ui_create_checkbox(bool selected);
+textbox_state ui_create_textbox(u16 max_len);
+button_state ui_create_button();
+scroll_state ui_create_scroll(s32 scroll);
+dropdown_state ui_create_dropdown();
+
+void ui_destroy_textbox(textbox_state *state);
+
+// widgets
+bool is_shortcut_down(s32 shortcut_keys[2]);
+void ui_begin_menu_bar();
+bool ui_push_menu(char *title);
+bool ui_push_menu_item(char *title, char *shortcut);
+void ui_push_menu_item_separator();
+bool ui_push_dropdown(dropdown_state *state, char *title);
+bool ui_push_dropdown_item(image *icon, char *title, s32 index);
+void ui_push_separator();
+void ui_push_vertical_dragbar();
+void ui_block_begin(layout_direction direction);
+void ui_block_end();
+void ui_end_menu_bar();
+void ui_push_text(char *text);
+void ui_push_textf(font *f, char *text);
+void ui_push_textf_width(font *f, char *text, s32 maxw);
+bool ui_push_hypertext_link(char *text);
+bool ui_push_color_button(char *text, bool selected, color color);
+bool ui_push_image(image *img, s32 w, s32 h, s32 outline, color tint);
+bool ui_push_checkbox(checkbox_state *state, char *title);
+bool ui_push_textbox(textbox_state *state, char *title);
+bool ui_push_button(button_state *button, char *title);
+bool ui_push_button_image(button_state *button, char *title, image *img);
+void ui_scroll_begin(scroll_state *state);
+void ui_scroll_end();
+
+#endif
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