MeirGavish
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
#include "selection_grid.h"
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static void selection_grid_process_directional_input(SelectionGrid *selection_grid)
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{
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int horz_tri_input = bit_tribool(key_hit(KEY_ANY), KI_RIGHT, KI_LEFT);
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if (horz_tri_input != 0)
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{
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selection_grid_move_selection_horz(selection_grid, horz_tri_input);
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/* Avoid handling both vertical and horizontal input at the same time,
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* it creates all sorts of difficult edge cases.
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*/
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return;
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}
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int vert_tri_input = bit_tribool(key_hit(KEY_ANY), KI_DOWN, KI_UP);
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if (vert_tri_input != 0)
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{
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selection_grid_move_selection_vert(selection_grid, vert_tri_input);
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}
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}
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void selection_grid_move_selection_horz(SelectionGrid* selection_grid,
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int direction_tribool)
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{
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Selection new_selection = selection_grid->selection;
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new_selection.x += direction_tribool;
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if( selection_grid->selection.y >= 0
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&& selection_grid->selection.y < selection_grid->num_rows
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&& new_selection.x >= 0
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&& new_selection.x < selection_grid->rows[new_selection.y].get_size())
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{
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selection_grid->rows[new_selection.y].on_selection_changed(selection_grid, new_selection.y, &selection_grid->selection, &new_selection);
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selection_grid->selection = new_selection;
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}
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}
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void selection_grid_move_selection_vert(SelectionGrid *selection_grid, int direction_tribool)
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{
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Selection selection = selection_grid->selection;
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Selection new_selection = selection;
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new_selection.y += direction_tribool;
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if (new_selection.y >= 0
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&& new_selection.y < selection_grid->num_rows)
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{
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int new_row_size = selection_grid->rows[new_selection.y].get_size();
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if (new_row_size <= 0)
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return;
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if (selection.x >= new_row_size)
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{
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// TODO: Maintain relative horizontal position
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// Clip selection to row size
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new_selection.x = new_row_size - 1;
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}
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if (selection.y >= 0 && selection.y < selection_grid->num_rows)
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{
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selection_grid->rows[selection.y].on_selection_changed(selection_grid, selection.y, &selection, &new_selection);
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}
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selection_grid->rows[new_selection.y].on_selection_changed(selection_grid, new_selection.y, &selection, &new_selection);
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selection_grid->selection = new_selection;
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}
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}
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void selection_grid_process_input(SelectionGrid *selection_grid)
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{
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if (selection_grid == NULL || selection_grid->rows == NULL)
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return;
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selection_grid_process_directional_input(selection_grid);
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u32 non_directional_key = KEY_ANY & ~KEY_DIR;
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if (key_hit(non_directional_key))
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{
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Selection* selection = &selection_grid->selection; // To make the next line shorter and more readable
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selection_grid->rows[selection->y].on_key_hit(selection_grid, selection);
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}
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}
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