mirror of https://github.com/vurtun/nuklear.git
319 lines
10 KiB
C
319 lines
10 KiB
C
#include "nuklear.h"
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#include "nuklear_internal.h"
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/* ==============================================================
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*
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* CHART
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*
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* ===============================================================*/
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NK_API int
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nk_chart_begin_colored(struct nk_context *ctx, enum nk_chart_type type,
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struct nk_color color, struct nk_color highlight,
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int count, float min_value, float max_value)
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{
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struct nk_window *win;
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struct nk_chart *chart;
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const struct nk_style *config;
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const struct nk_style_chart *style;
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const struct nk_style_item *background;
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struct nk_rect bounds = {0, 0, 0, 0};
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NK_ASSERT(ctx);
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NK_ASSERT(ctx->current);
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NK_ASSERT(ctx->current->layout);
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if (!ctx || !ctx->current || !ctx->current->layout) return 0;
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if (!nk_widget(&bounds, ctx)) {
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chart = &ctx->current->layout->chart;
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nk_zero(chart, sizeof(*chart));
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return 0;
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}
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win = ctx->current;
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config = &ctx->style;
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chart = &win->layout->chart;
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style = &config->chart;
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/* setup basic generic chart */
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nk_zero(chart, sizeof(*chart));
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chart->x = bounds.x + style->padding.x;
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chart->y = bounds.y + style->padding.y;
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chart->w = bounds.w - 2 * style->padding.x;
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chart->h = bounds.h - 2 * style->padding.y;
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chart->w = NK_MAX(chart->w, 2 * style->padding.x);
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chart->h = NK_MAX(chart->h, 2 * style->padding.y);
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/* add first slot into chart */
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{struct nk_chart_slot *slot = &chart->slots[chart->slot++];
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slot->type = type;
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slot->count = count;
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slot->color = color;
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slot->highlight = highlight;
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slot->min = NK_MIN(min_value, max_value);
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slot->max = NK_MAX(min_value, max_value);
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slot->range = slot->max - slot->min;}
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/* draw chart background */
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background = &style->background;
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if (background->type == NK_STYLE_ITEM_IMAGE) {
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nk_draw_image(&win->buffer, bounds, &background->data.image, nk_white);
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} else {
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nk_fill_rect(&win->buffer, bounds, style->rounding, style->border_color);
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nk_fill_rect(&win->buffer, nk_shrink_rect(bounds, style->border),
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style->rounding, style->background.data.color);
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}
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return 1;
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}
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NK_API int
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nk_chart_begin(struct nk_context *ctx, const enum nk_chart_type type,
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int count, float min_value, float max_value)
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{
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return nk_chart_begin_colored(ctx, type, ctx->style.chart.color,
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ctx->style.chart.selected_color, count, min_value, max_value);
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}
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NK_API void
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nk_chart_add_slot_colored(struct nk_context *ctx, const enum nk_chart_type type,
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struct nk_color color, struct nk_color highlight,
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int count, float min_value, float max_value)
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{
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NK_ASSERT(ctx);
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NK_ASSERT(ctx->current);
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NK_ASSERT(ctx->current->layout);
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NK_ASSERT(ctx->current->layout->chart.slot < NK_CHART_MAX_SLOT);
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if (!ctx || !ctx->current || !ctx->current->layout) return;
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if (ctx->current->layout->chart.slot >= NK_CHART_MAX_SLOT) return;
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/* add another slot into the graph */
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{struct nk_chart *chart = &ctx->current->layout->chart;
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struct nk_chart_slot *slot = &chart->slots[chart->slot++];
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slot->type = type;
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slot->count = count;
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slot->color = color;
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slot->highlight = highlight;
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slot->min = NK_MIN(min_value, max_value);
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slot->max = NK_MAX(min_value, max_value);
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slot->range = slot->max - slot->min;}
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}
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NK_API void
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nk_chart_add_slot(struct nk_context *ctx, const enum nk_chart_type type,
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int count, float min_value, float max_value)
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{
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nk_chart_add_slot_colored(ctx, type, ctx->style.chart.color,
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ctx->style.chart.selected_color, count, min_value, max_value);
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}
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NK_INTERN nk_flags
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nk_chart_push_line(struct nk_context *ctx, struct nk_window *win,
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struct nk_chart *g, float value, int slot)
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{
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struct nk_panel *layout = win->layout;
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const struct nk_input *i = &ctx->input;
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struct nk_command_buffer *out = &win->buffer;
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nk_flags ret = 0;
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struct nk_vec2 cur;
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struct nk_rect bounds;
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struct nk_color color;
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float step;
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float range;
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float ratio;
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NK_ASSERT(slot >= 0 && slot < NK_CHART_MAX_SLOT);
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step = g->w / (float)g->slots[slot].count;
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range = g->slots[slot].max - g->slots[slot].min;
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ratio = (value - g->slots[slot].min) / range;
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if (g->slots[slot].index == 0) {
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/* first data point does not have a connection */
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g->slots[slot].last.x = g->x;
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g->slots[slot].last.y = (g->y + g->h) - ratio * (float)g->h;
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bounds.x = g->slots[slot].last.x - 2;
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bounds.y = g->slots[slot].last.y - 2;
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bounds.w = bounds.h = 4;
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color = g->slots[slot].color;
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if (!(layout->flags & NK_WINDOW_ROM) &&
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NK_INBOX(i->mouse.pos.x,i->mouse.pos.y, g->slots[slot].last.x-3, g->slots[slot].last.y-3, 6, 6)){
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ret = nk_input_is_mouse_hovering_rect(i, bounds) ? NK_CHART_HOVERING : 0;
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ret |= (i->mouse.buttons[NK_BUTTON_LEFT].down &&
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i->mouse.buttons[NK_BUTTON_LEFT].clicked) ? NK_CHART_CLICKED: 0;
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color = g->slots[slot].highlight;
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}
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nk_fill_rect(out, bounds, 0, color);
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g->slots[slot].index += 1;
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return ret;
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}
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/* draw a line between the last data point and the new one */
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color = g->slots[slot].color;
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cur.x = g->x + (float)(step * (float)g->slots[slot].index);
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cur.y = (g->y + g->h) - (ratio * (float)g->h);
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nk_stroke_line(out, g->slots[slot].last.x, g->slots[slot].last.y, cur.x, cur.y, 1.0f, color);
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bounds.x = cur.x - 3;
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bounds.y = cur.y - 3;
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bounds.w = bounds.h = 6;
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/* user selection of current data point */
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if (!(layout->flags & NK_WINDOW_ROM)) {
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if (nk_input_is_mouse_hovering_rect(i, bounds)) {
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ret = NK_CHART_HOVERING;
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ret |= (!i->mouse.buttons[NK_BUTTON_LEFT].down &&
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i->mouse.buttons[NK_BUTTON_LEFT].clicked) ? NK_CHART_CLICKED: 0;
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color = g->slots[slot].highlight;
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}
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}
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nk_fill_rect(out, nk_rect(cur.x - 2, cur.y - 2, 4, 4), 0, color);
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/* save current data point position */
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g->slots[slot].last.x = cur.x;
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g->slots[slot].last.y = cur.y;
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g->slots[slot].index += 1;
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return ret;
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}
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NK_INTERN nk_flags
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nk_chart_push_column(const struct nk_context *ctx, struct nk_window *win,
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struct nk_chart *chart, float value, int slot)
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{
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struct nk_command_buffer *out = &win->buffer;
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const struct nk_input *in = &ctx->input;
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struct nk_panel *layout = win->layout;
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float ratio;
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nk_flags ret = 0;
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struct nk_color color;
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struct nk_rect item = {0,0,0,0};
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NK_ASSERT(slot >= 0 && slot < NK_CHART_MAX_SLOT);
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if (chart->slots[slot].index >= chart->slots[slot].count)
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return nk_false;
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if (chart->slots[slot].count) {
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float padding = (float)(chart->slots[slot].count-1);
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item.w = (chart->w - padding) / (float)(chart->slots[slot].count);
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}
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/* calculate bounds of current bar chart entry */
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color = chart->slots[slot].color;;
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item.h = chart->h * NK_ABS((value/chart->slots[slot].range));
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if (value >= 0) {
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ratio = (value + NK_ABS(chart->slots[slot].min)) / NK_ABS(chart->slots[slot].range);
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item.y = (chart->y + chart->h) - chart->h * ratio;
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} else {
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ratio = (value - chart->slots[slot].max) / chart->slots[slot].range;
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item.y = chart->y + (chart->h * NK_ABS(ratio)) - item.h;
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}
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item.x = chart->x + ((float)chart->slots[slot].index * item.w);
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item.x = item.x + ((float)chart->slots[slot].index);
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/* user chart bar selection */
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if (!(layout->flags & NK_WINDOW_ROM) &&
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NK_INBOX(in->mouse.pos.x,in->mouse.pos.y,item.x,item.y,item.w,item.h)) {
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ret = NK_CHART_HOVERING;
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ret |= (!in->mouse.buttons[NK_BUTTON_LEFT].down &&
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in->mouse.buttons[NK_BUTTON_LEFT].clicked) ? NK_CHART_CLICKED: 0;
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color = chart->slots[slot].highlight;
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}
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nk_fill_rect(out, item, 0, color);
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chart->slots[slot].index += 1;
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return ret;
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}
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NK_API nk_flags
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nk_chart_push_slot(struct nk_context *ctx, float value, int slot)
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{
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nk_flags flags;
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struct nk_window *win;
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NK_ASSERT(ctx);
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NK_ASSERT(ctx->current);
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NK_ASSERT(slot >= 0 && slot < NK_CHART_MAX_SLOT);
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NK_ASSERT(slot < ctx->current->layout->chart.slot);
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if (!ctx || !ctx->current || slot >= NK_CHART_MAX_SLOT) return nk_false;
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if (slot >= ctx->current->layout->chart.slot) return nk_false;
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win = ctx->current;
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if (win->layout->chart.slot < slot) return nk_false;
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switch (win->layout->chart.slots[slot].type) {
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case NK_CHART_LINES:
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flags = nk_chart_push_line(ctx, win, &win->layout->chart, value, slot); break;
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case NK_CHART_COLUMN:
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flags = nk_chart_push_column(ctx, win, &win->layout->chart, value, slot); break;
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default:
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case NK_CHART_MAX:
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flags = 0;
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}
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return flags;
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}
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NK_API nk_flags
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nk_chart_push(struct nk_context *ctx, float value)
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{
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return nk_chart_push_slot(ctx, value, 0);
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}
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NK_API void
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nk_chart_end(struct nk_context *ctx)
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{
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struct nk_window *win;
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struct nk_chart *chart;
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NK_ASSERT(ctx);
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NK_ASSERT(ctx->current);
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if (!ctx || !ctx->current)
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return;
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win = ctx->current;
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chart = &win->layout->chart;
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NK_MEMSET(chart, 0, sizeof(*chart));
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return;
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}
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NK_API void
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nk_plot(struct nk_context *ctx, enum nk_chart_type type, const float *values,
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int count, int offset)
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{
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int i = 0;
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float min_value;
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float max_value;
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NK_ASSERT(ctx);
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NK_ASSERT(values);
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if (!ctx || !values || !count) return;
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min_value = values[offset];
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max_value = values[offset];
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for (i = 0; i < count; ++i) {
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min_value = NK_MIN(values[i + offset], min_value);
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max_value = NK_MAX(values[i + offset], max_value);
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}
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if (nk_chart_begin(ctx, type, count, min_value, max_value)) {
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for (i = 0; i < count; ++i)
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nk_chart_push(ctx, values[i + offset]);
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nk_chart_end(ctx);
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}
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}
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NK_API void
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nk_plot_function(struct nk_context *ctx, enum nk_chart_type type, void *userdata,
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float(*value_getter)(void* user, int index), int count, int offset)
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{
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int i = 0;
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float min_value;
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float max_value;
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NK_ASSERT(ctx);
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NK_ASSERT(value_getter);
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if (!ctx || !value_getter || !count) return;
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max_value = min_value = value_getter(userdata, offset);
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for (i = 0; i < count; ++i) {
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float value = value_getter(userdata, i + offset);
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min_value = NK_MIN(value, min_value);
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max_value = NK_MAX(value, max_value);
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}
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if (nk_chart_begin(ctx, type, count, min_value, max_value)) {
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for (i = 0; i < count; ++i)
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nk_chart_push(ctx, value_getter(userdata, i + offset));
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nk_chart_end(ctx);
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}
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}
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