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111 lines
2.6 KiB
C++
111 lines
2.6 KiB
C++
#include <allegro5/allegro.h>
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#include <allegro5/allegro_font.h>
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#include <allegro5/allegro_primitives.h>
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#include <string>
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#include "cursor.h"
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#include "line.h"
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using std::string;
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using std::vector;
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template<class T>
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Cursor<T>::Cursor()
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{
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active = false;
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}
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//Give items to the cursor, and set the selected item to be the first
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template<class T>
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void Cursor<T>::activate(std::vector<T> _items)
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{
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items = _items;
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selected = 0;
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active = true;
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}
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//Functionality that was not used for this game, may be used in future projects.
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template<class T>
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void Cursor<T>::deactivate()
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{
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active = false;
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}
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//Draw the menu options on the screen based on the x and y coordinates for the menu to start at
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template<class T>
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void Cursor<T>::draw(float _x_start, float _y_start, float _y_offset, ALLEGRO_FONT* _font) {
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vector<string> items_text = get_item_strings();
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x_start = _x_start;
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y_start = _y_start;
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y_offset = _y_offset;
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font = _font;
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for (unsigned int i = 0; i < items_text.size(); i++) {
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al_draw_text(font, al_map_rgb(255, 255, 255), x_start, y_start + (y_offset*i), ALLEGRO_ALIGN_LEFT, items_text.at(i).c_str());
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}
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update_selector();
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}
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//Change the selection of the cursor
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template<class T>
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void Cursor<T>::down()
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{
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if (selected < items.size() - 1) {
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selected++;
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redraw();
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}
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}
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template<class T>
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void Cursor<T>::up()
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{
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if (selected > 0) {
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selected--;
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redraw();
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}
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}
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template<class T>
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T Cursor<T>::get_selected() {
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return items.at(selected);
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}
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//Clear screen before drawing menu
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template<class T>
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void Cursor<T>::redraw()
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{
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al_clear_to_color(al_map_rgb(0, 0, 0));
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draw(x_start, y_start, y_offset, font);
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}
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//Draw selector to highlight proper selected item
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template<class T>
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void Cursor<T>::update_selector() {
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ALLEGRO_COLOR white = al_map_rgb(255, 255, 255);
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float offset = y_offset * selected;
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float x1 = x_start - 5;
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float y1 = y_start + offset;
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float x2 = x_start - 5;
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float y2 = y_start + 5 + offset;
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float x3 = x_start - 1;
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float y3 = y_start + 2.5 + offset;
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al_draw_filled_triangle(x1, y1, x2, y2, x3, y3, white);
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}
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//Define how the template will function when given various types. Only string was needed for this project.
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template Cursor<string>::Cursor();
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template void Cursor<string>::activate(std::vector<string> _options);
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template void Cursor<string>::deactivate();
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template void Cursor<string>::draw(float x_start, float y_start, float _y_offset, ALLEGRO_FONT* font);
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template void Cursor<string>::redraw();
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template void Cursor<string>::up();
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template void Cursor<string>::down();
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template string Cursor<string>::get_selected();
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template void Cursor<string>::update_selector();
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vector<string> Cursor<string>::get_item_strings() {
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return items;
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}
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