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nuklear/src/nuklear_layout.c

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#include "nuklear.h"
#include "nuklear_internal.h"
/* ===============================================================
*
* LAYOUT
*
* ===============================================================*/
NK_API void
nk_layout_set_min_row_height(struct nk_context *ctx, float height)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
layout->row.min_height = height;
}
NK_API void
nk_layout_reset_min_row_height(struct nk_context *ctx)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
layout->row.min_height = ctx->style.font->height;
layout->row.min_height += ctx->style.text.padding.y*2;
layout->row.min_height += ctx->style.window.min_row_height_padding*2;
}
NK_LIB float
nk_layout_row_calculate_usable_space(const struct nk_style *style, enum nk_panel_type type,
float total_space, int columns)
{
float panel_padding;
float panel_spacing;
float panel_space;
struct nk_vec2 spacing;
struct nk_vec2 padding;
spacing = style->window.spacing;
padding = nk_panel_get_padding(style, type);
/* calculate the usable panel space */
panel_padding = 2 * padding.x;
panel_spacing = (float)NK_MAX(columns - 1, 0) * spacing.x;
panel_space = total_space - panel_padding - panel_spacing;
return panel_space;
}
NK_LIB void
nk_panel_layout(const struct nk_context *ctx, struct nk_window *win,
float height, int cols)
{
struct nk_panel *layout;
const struct nk_style *style;
struct nk_command_buffer *out;
struct nk_vec2 item_spacing;
struct nk_color color;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
/* prefetch some configuration data */
layout = win->layout;
style = &ctx->style;
out = &win->buffer;
color = style->window.background;
item_spacing = style->window.spacing;
/* if one of these triggers you forgot to add an `if` condition around either
a window, group, popup, combobox or contextual menu `begin` and `end` block.
Example:
if (nk_begin(...) {...} nk_end(...); or
if (nk_group_begin(...) { nk_group_end(...);} */
NK_ASSERT(!(layout->flags & NK_WINDOW_MINIMIZED));
NK_ASSERT(!(layout->flags & NK_WINDOW_HIDDEN));
NK_ASSERT(!(layout->flags & NK_WINDOW_CLOSED));
/* update the current row and set the current row layout */
layout->row.index = 0;
layout->at_y += layout->row.height;
layout->row.columns = cols;
if (height == 0.0f)
layout->row.height = NK_MAX(height, layout->row.min_height) + item_spacing.y;
else layout->row.height = height + item_spacing.y;
layout->row.item_offset = 0;
if (layout->flags & NK_WINDOW_DYNAMIC) {
/* draw background for dynamic panels */
struct nk_rect background;
background.x = win->bounds.x;
background.w = win->bounds.w;
background.y = layout->at_y - 1.0f;
background.h = layout->row.height + 1.0f;
nk_fill_rect(out, background, 0, color);
}
}
NK_LIB void
nk_row_layout(struct nk_context *ctx, enum nk_layout_format fmt,
float height, int cols, int width)
{
/* update the current row and set the current row layout */
struct nk_window *win;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
nk_panel_layout(ctx, win, height, cols);
if (fmt == NK_DYNAMIC)
win->layout->row.type = NK_LAYOUT_DYNAMIC_FIXED;
else win->layout->row.type = NK_LAYOUT_STATIC_FIXED;
win->layout->row.ratio = 0;
win->layout->row.filled = 0;
win->layout->row.item_offset = 0;
win->layout->row.item_width = (float)width;
}
NK_API float
nk_layout_ratio_from_pixel(struct nk_context *ctx, float pixel_width)
{
struct nk_window *win;
NK_ASSERT(ctx);
NK_ASSERT(pixel_width);
if (!ctx || !ctx->current || !ctx->current->layout) return 0;
win = ctx->current;
return NK_CLAMP(0.0f, pixel_width/win->bounds.x, 1.0f);
}
NK_API void
nk_layout_row_dynamic(struct nk_context *ctx, float height, int cols)
{
nk_row_layout(ctx, NK_DYNAMIC, height, cols, 0);
}
NK_API void
nk_layout_row_static(struct nk_context *ctx, float height, int item_width, int cols)
{
nk_row_layout(ctx, NK_STATIC, height, cols, item_width);
}
NK_API void
nk_layout_row_begin(struct nk_context *ctx, enum nk_layout_format fmt,
float row_height, int cols)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
nk_panel_layout(ctx, win, row_height, cols);
if (fmt == NK_DYNAMIC)
layout->row.type = NK_LAYOUT_DYNAMIC_ROW;
else layout->row.type = NK_LAYOUT_STATIC_ROW;
layout->row.ratio = 0;
layout->row.filled = 0;
layout->row.item_width = 0;
layout->row.item_offset = 0;
layout->row.columns = cols;
}
NK_API void
nk_layout_row_push(struct nk_context *ctx, float ratio_or_width)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
NK_ASSERT(layout->row.type == NK_LAYOUT_STATIC_ROW || layout->row.type == NK_LAYOUT_DYNAMIC_ROW);
if (layout->row.type != NK_LAYOUT_STATIC_ROW && layout->row.type != NK_LAYOUT_DYNAMIC_ROW)
return;
if (layout->row.type == NK_LAYOUT_DYNAMIC_ROW) {
float ratio = ratio_or_width;
if ((ratio + layout->row.filled) > 1.0f) return;
if (ratio > 0.0f)
layout->row.item_width = NK_SATURATE(ratio);
else layout->row.item_width = 1.0f - layout->row.filled;
} else layout->row.item_width = ratio_or_width;
}
NK_API void
nk_layout_row_end(struct nk_context *ctx)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
NK_ASSERT(layout->row.type == NK_LAYOUT_STATIC_ROW || layout->row.type == NK_LAYOUT_DYNAMIC_ROW);
if (layout->row.type != NK_LAYOUT_STATIC_ROW && layout->row.type != NK_LAYOUT_DYNAMIC_ROW)
return;
layout->row.item_width = 0;
layout->row.item_offset = 0;
}
NK_API void
nk_layout_row(struct nk_context *ctx, enum nk_layout_format fmt,
float height, int cols, const float *ratio)
{
int i;
int n_undef = 0;
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
nk_panel_layout(ctx, win, height, cols);
if (fmt == NK_DYNAMIC) {
/* calculate width of undefined widget ratios */
float r = 0;
layout->row.ratio = ratio;
for (i = 0; i < cols; ++i) {
if (ratio[i] < 0.0f)
n_undef++;
else r += ratio[i];
}
r = NK_SATURATE(1.0f - r);
layout->row.type = NK_LAYOUT_DYNAMIC;
layout->row.item_width = (r > 0 && n_undef > 0) ? (r / (float)n_undef):0;
} else {
layout->row.ratio = ratio;
layout->row.type = NK_LAYOUT_STATIC;
layout->row.item_width = 0;
layout->row.item_offset = 0;
}
layout->row.item_offset = 0;
layout->row.filled = 0;
}
NK_API void
nk_layout_row_template_begin(struct nk_context *ctx, float height)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
nk_panel_layout(ctx, win, height, 1);
layout->row.type = NK_LAYOUT_TEMPLATE;
layout->row.columns = 0;
layout->row.ratio = 0;
layout->row.item_width = 0;
layout->row.item_height = 0;
layout->row.item_offset = 0;
layout->row.filled = 0;
layout->row.item.x = 0;
layout->row.item.y = 0;
layout->row.item.w = 0;
layout->row.item.h = 0;
}
NK_API void
nk_layout_row_template_push_dynamic(struct nk_context *ctx)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
NK_ASSERT(layout->row.type == NK_LAYOUT_TEMPLATE);
NK_ASSERT(layout->row.columns < NK_MAX_LAYOUT_ROW_TEMPLATE_COLUMNS);
if (layout->row.type != NK_LAYOUT_TEMPLATE) return;
if (layout->row.columns >= NK_MAX_LAYOUT_ROW_TEMPLATE_COLUMNS) return;
layout->row.templates[layout->row.columns++] = -1.0f;
}
NK_API void
nk_layout_row_template_push_variable(struct nk_context *ctx, float min_width)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
NK_ASSERT(layout->row.type == NK_LAYOUT_TEMPLATE);
NK_ASSERT(layout->row.columns < NK_MAX_LAYOUT_ROW_TEMPLATE_COLUMNS);
if (layout->row.type != NK_LAYOUT_TEMPLATE) return;
if (layout->row.columns >= NK_MAX_LAYOUT_ROW_TEMPLATE_COLUMNS) return;
layout->row.templates[layout->row.columns++] = -min_width;
}
NK_API void
nk_layout_row_template_push_static(struct nk_context *ctx, float width)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
NK_ASSERT(layout->row.type == NK_LAYOUT_TEMPLATE);
NK_ASSERT(layout->row.columns < NK_MAX_LAYOUT_ROW_TEMPLATE_COLUMNS);
if (layout->row.type != NK_LAYOUT_TEMPLATE) return;
if (layout->row.columns >= NK_MAX_LAYOUT_ROW_TEMPLATE_COLUMNS) return;
layout->row.templates[layout->row.columns++] = width;
}
NK_API void
nk_layout_row_template_end(struct nk_context *ctx)
{
struct nk_window *win;
struct nk_panel *layout;
int i = 0;
int variable_count = 0;
int min_variable_count = 0;
float min_fixed_width = 0.0f;
float total_fixed_width = 0.0f;
float max_variable_width = 0.0f;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
NK_ASSERT(layout->row.type == NK_LAYOUT_TEMPLATE);
if (layout->row.type != NK_LAYOUT_TEMPLATE) return;
for (i = 0; i < layout->row.columns; ++i) {
float width = layout->row.templates[i];
if (width >= 0.0f) {
total_fixed_width += width;
min_fixed_width += width;
} else if (width < -1.0f) {
width = -width;
total_fixed_width += width;
max_variable_width = NK_MAX(max_variable_width, width);
variable_count++;
} else {
min_variable_count++;
variable_count++;
}
}
if (variable_count) {
float space = nk_layout_row_calculate_usable_space(&ctx->style, layout->type,
layout->bounds.w, layout->row.columns);
float var_width = (NK_MAX(space-min_fixed_width,0.0f)) / (float)variable_count;
int enough_space = var_width >= max_variable_width;
if (!enough_space)
var_width = (NK_MAX(space-total_fixed_width,0)) / (float)min_variable_count;
for (i = 0; i < layout->row.columns; ++i) {
float *width = &layout->row.templates[i];
*width = (*width >= 0.0f)? *width: (*width < -1.0f && !enough_space)? -(*width): var_width;
}
}
}
NK_API void
nk_layout_space_begin(struct nk_context *ctx, enum nk_layout_format fmt,
float height, int widget_count)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
nk_panel_layout(ctx, win, height, widget_count);
if (fmt == NK_STATIC)
layout->row.type = NK_LAYOUT_STATIC_FREE;
else layout->row.type = NK_LAYOUT_DYNAMIC_FREE;
layout->row.ratio = 0;
layout->row.filled = 0;
layout->row.item_width = 0;
layout->row.item_offset = 0;
}
NK_API void
nk_layout_space_end(struct nk_context *ctx)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
layout->row.item_width = 0;
layout->row.item_height = 0;
layout->row.item_offset = 0;
nk_zero(&layout->row.item, sizeof(layout->row.item));
}
NK_API void
nk_layout_space_push(struct nk_context *ctx, struct nk_rect rect)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
layout->row.item = rect;
}
NK_API struct nk_rect
nk_layout_space_bounds(struct nk_context *ctx)
{
struct nk_rect ret;
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
win = ctx->current;
layout = win->layout;
ret.x = layout->clip.x;
ret.y = layout->clip.y;
ret.w = layout->clip.w;
ret.h = layout->row.height;
return ret;
}
NK_API struct nk_rect
nk_layout_widget_bounds(struct nk_context *ctx)
{
struct nk_rect ret;
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
win = ctx->current;
layout = win->layout;
ret.x = layout->at_x;
ret.y = layout->at_y;
ret.w = layout->bounds.w - NK_MAX(layout->at_x - layout->bounds.x,0);
ret.h = layout->row.height;
return ret;
}
NK_API struct nk_vec2
nk_layout_space_to_screen(struct nk_context *ctx, struct nk_vec2 ret)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
win = ctx->current;
layout = win->layout;
ret.x += layout->at_x - (float)*layout->offset_x;
ret.y += layout->at_y - (float)*layout->offset_y;
return ret;
}
NK_API struct nk_vec2
nk_layout_space_to_local(struct nk_context *ctx, struct nk_vec2 ret)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
win = ctx->current;
layout = win->layout;
ret.x += -layout->at_x + (float)*layout->offset_x;
ret.y += -layout->at_y + (float)*layout->offset_y;
return ret;
}
NK_API struct nk_rect
nk_layout_space_rect_to_screen(struct nk_context *ctx, struct nk_rect ret)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
win = ctx->current;
layout = win->layout;
ret.x += layout->at_x - (float)*layout->offset_x;
ret.y += layout->at_y - (float)*layout->offset_y;
return ret;
}
NK_API struct nk_rect
nk_layout_space_rect_to_local(struct nk_context *ctx, struct nk_rect ret)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
win = ctx->current;
layout = win->layout;
ret.x += -layout->at_x + (float)*layout->offset_x;
ret.y += -layout->at_y + (float)*layout->offset_y;
return ret;
}
NK_LIB void
nk_panel_alloc_row(const struct nk_context *ctx, struct nk_window *win)
{
struct nk_panel *layout = win->layout;
struct nk_vec2 spacing = ctx->style.window.spacing;
const float row_height = layout->row.height - spacing.y;
nk_panel_layout(ctx, win, row_height, layout->row.columns);
}
NK_LIB void
nk_layout_widget_space(struct nk_rect *bounds, const struct nk_context *ctx,
struct nk_window *win, int modify)
{
struct nk_panel *layout;
const struct nk_style *style;
struct nk_vec2 spacing;
struct nk_vec2 padding;
float item_offset = 0;
float item_width = 0;
float item_spacing = 0;
float panel_space = 0;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
style = &ctx->style;
NK_ASSERT(bounds);
spacing = style->window.spacing;
padding = nk_panel_get_padding(style, layout->type);
panel_space = nk_layout_row_calculate_usable_space(&ctx->style, layout->type,
layout->bounds.w, layout->row.columns);
/* calculate the width of one item inside the current layout space */
switch (layout->row.type) {
case NK_LAYOUT_DYNAMIC_FIXED: {
/* scaling fixed size widgets item width */
item_width = NK_MAX(1.0f,panel_space) / (float)layout->row.columns;
item_offset = (float)layout->row.index * item_width;
item_spacing = (float)layout->row.index * spacing.x;
} break;
case NK_LAYOUT_DYNAMIC_ROW: {
/* scaling single ratio widget width */
item_width = layout->row.item_width * panel_space;
item_offset = layout->row.item_offset;
item_spacing = 0;
if (modify) {
layout->row.item_offset += item_width + spacing.x;
layout->row.filled += layout->row.item_width;
layout->row.index = 0;
}
} break;
case NK_LAYOUT_DYNAMIC_FREE: {
/* panel width depended free widget placing */
bounds->x = layout->at_x + (layout->bounds.w * layout->row.item.x);
bounds->x -= (float)*layout->offset_x;
bounds->y = layout->at_y + (layout->row.height * layout->row.item.y);
bounds->y -= (float)*layout->offset_y;
bounds->w = layout->bounds.w * layout->row.item.w;
bounds->h = layout->row.height * layout->row.item.h;
return;
}
case NK_LAYOUT_DYNAMIC: {
/* scaling arrays of panel width ratios for every widget */
float ratio;
NK_ASSERT(layout->row.ratio);
ratio = (layout->row.ratio[layout->row.index] < 0) ?
layout->row.item_width : layout->row.ratio[layout->row.index];
item_spacing = (float)layout->row.index * spacing.x;
item_width = (ratio * panel_space);
item_offset = layout->row.item_offset;
if (modify) {
layout->row.item_offset += item_width;
layout->row.filled += ratio;
}
} break;
case NK_LAYOUT_STATIC_FIXED: {
/* non-scaling fixed widgets item width */
item_width = layout->row.item_width;
item_offset = (float)layout->row.index * item_width;
item_spacing = (float)layout->row.index * spacing.x;
} break;
case NK_LAYOUT_STATIC_ROW: {
/* scaling single ratio widget width */
item_width = layout->row.item_width;
item_offset = layout->row.item_offset;
item_spacing = (float)layout->row.index * spacing.x;
if (modify) layout->row.item_offset += item_width;
} break;
case NK_LAYOUT_STATIC_FREE: {
/* free widget placing */
bounds->x = layout->at_x + layout->row.item.x;
bounds->w = layout->row.item.w;
if (((bounds->x + bounds->w) > layout->max_x) && modify)
layout->max_x = (bounds->x + bounds->w);
bounds->x -= (float)*layout->offset_x;
bounds->y = layout->at_y + layout->row.item.y;
bounds->y -= (float)*layout->offset_y;
bounds->h = layout->row.item.h;
return;
}
case NK_LAYOUT_STATIC: {
/* non-scaling array of panel pixel width for every widget */
item_spacing = (float)layout->row.index * spacing.x;
item_width = layout->row.ratio[layout->row.index];
item_offset = layout->row.item_offset;
if (modify) layout->row.item_offset += item_width;
} break;
case NK_LAYOUT_TEMPLATE: {
/* stretchy row layout with combined dynamic/static widget width*/
NK_ASSERT(layout->row.index < layout->row.columns);
NK_ASSERT(layout->row.index < NK_MAX_LAYOUT_ROW_TEMPLATE_COLUMNS);
item_width = layout->row.templates[layout->row.index];
item_offset = layout->row.item_offset;
item_spacing = (float)layout->row.index * spacing.x;
if (modify) layout->row.item_offset += item_width;
} break;
default: NK_ASSERT(0); break;
};
/* set the bounds of the newly allocated widget */
bounds->w = item_width;
bounds->h = layout->row.height - spacing.y;
bounds->y = layout->at_y - (float)*layout->offset_y;
bounds->x = layout->at_x + item_offset + item_spacing + padding.x;
if (((bounds->x + bounds->w) > layout->max_x) && modify)
layout->max_x = bounds->x + bounds->w;
bounds->x -= (float)*layout->offset_x;
}
NK_LIB void
nk_panel_alloc_space(struct nk_rect *bounds, const struct nk_context *ctx)
{
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
/* check if the end of the row has been hit and begin new row if so */
win = ctx->current;
layout = win->layout;
if (layout->row.index >= layout->row.columns)
nk_panel_alloc_row(ctx, win);
/* calculate widget position and size */
nk_layout_widget_space(bounds, ctx, win, nk_true);
layout->row.index++;
}
NK_LIB void
nk_layout_peek(struct nk_rect *bounds, struct nk_context *ctx)
{
float y;
int index;
struct nk_window *win;
struct nk_panel *layout;
NK_ASSERT(ctx);
NK_ASSERT(ctx->current);
NK_ASSERT(ctx->current->layout);
if (!ctx || !ctx->current || !ctx->current->layout)
return;
win = ctx->current;
layout = win->layout;
y = layout->at_y;
index = layout->row.index;
if (layout->row.index >= layout->row.columns) {
layout->at_y += layout->row.height;
layout->row.index = 0;
}
nk_layout_widget_space(bounds, ctx, win, nk_false);
if (!layout->row.index) {
bounds->x -= layout->row.item_offset;
}
layout->at_y = y;
layout->row.index = index;
}
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