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nuklear
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nuklear/src/nuklear_property.c

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#include "nuklear.h"
#include "nuklear_internal.h"
/* ===============================================================
*
* PROPERTY
*
* ===============================================================*/
NK_LIB void
nk_drag_behavior(nk_flags *state, const struct nk_input *in,
struct nk_rect drag, struct nk_property_variant *variant,
float inc_per_pixel)
{
int left_mouse_down = in && in->mouse.buttons[NK_BUTTON_LEFT].down;
int left_mouse_click_in_cursor = in &&
nk_input_has_mouse_click_down_in_rect(in, NK_BUTTON_LEFT, drag, nk_true);
nk_widget_state_reset(state);
if (nk_input_is_mouse_hovering_rect(in, drag))
*state = NK_WIDGET_STATE_HOVERED;
if (left_mouse_down && left_mouse_click_in_cursor) {
float delta, pixels;
pixels = in->mouse.delta.x;
delta = pixels * inc_per_pixel;
switch (variant->kind) {
default: break;
case NK_PROPERTY_INT:
variant->value.i = variant->value.i + (int)delta;
variant->value.i = NK_CLAMP(variant->min_value.i, variant->value.i, variant->max_value.i);
break;
case NK_PROPERTY_FLOAT:
variant->value.f = variant->value.f + (float)delta;
variant->value.f = NK_CLAMP(variant->min_value.f, variant->value.f, variant->max_value.f);
break;
case NK_PROPERTY_DOUBLE:
variant->value.d = variant->value.d + (double)delta;
variant->value.d = NK_CLAMP(variant->min_value.d, variant->value.d, variant->max_value.d);
break;
}
*state = NK_WIDGET_STATE_ACTIVE;
}
if (*state & NK_WIDGET_STATE_HOVER && !nk_input_is_mouse_prev_hovering_rect(in, drag))
*state |= NK_WIDGET_STATE_ENTERED;
else if (nk_input_is_mouse_prev_hovering_rect(in, drag))
*state |= NK_WIDGET_STATE_LEFT;
}
NK_LIB void
nk_property_behavior(nk_flags *ws, const struct nk_input *in,
struct nk_rect property, struct nk_rect label, struct nk_rect edit,
struct nk_rect empty, int *state, struct nk_property_variant *variant,
float inc_per_pixel)
{
if (in && *state == NK_PROPERTY_DEFAULT) {
if (nk_button_behavior(ws, edit, in, NK_BUTTON_DEFAULT))
*state = NK_PROPERTY_EDIT;
else if (nk_input_is_mouse_click_down_in_rect(in, NK_BUTTON_LEFT, label, nk_true))
*state = NK_PROPERTY_DRAG;
else if (nk_input_is_mouse_click_down_in_rect(in, NK_BUTTON_LEFT, empty, nk_true))
*state = NK_PROPERTY_DRAG;
}
if (*state == NK_PROPERTY_DRAG) {
nk_drag_behavior(ws, in, property, variant, inc_per_pixel);
if (!(*ws & NK_WIDGET_STATE_ACTIVED)) *state = NK_PROPERTY_DEFAULT;
}
}
NK_LIB void
nk_draw_property(struct nk_command_buffer *out, const struct nk_style_property *style,
const struct nk_rect *bounds, const struct nk_rect *label, nk_flags state,
const char *name, int len, const struct nk_user_font *font)
{
struct nk_text text;
const struct nk_style_item *background;
/* select correct background and text color */
if (state & NK_WIDGET_STATE_ACTIVED) {
background = &style->active;
text.text = style->label_active;
} else if (state & NK_WIDGET_STATE_HOVER) {
background = &style->hover;
text.text = style->label_hover;
} else {
background = &style->normal;
text.text = style->label_normal;
}
/* draw background */
if (background->type == NK_STYLE_ITEM_IMAGE) {
nk_draw_image(out, *bounds, &background->data.image, nk_white);
text.background = nk_rgba(0,0,0,0);
} else {
text.background = background->data.color;
nk_fill_rect(out, *bounds, style->rounding, background->data.color);
nk_stroke_rect(out, *bounds, style->rounding, style->border, background->data.color);
}
/* draw label */
text.padding = nk_vec2(0,0);
nk_widget_text(out, *label, name, len, &text, NK_TEXT_CENTERED, font);
}
NK_LIB void
nk_do_property(nk_flags *ws,
struct nk_command_buffer *out, struct nk_rect property,
const char *name, struct nk_property_variant *variant,
float inc_per_pixel, char *buffer, int *len,
int *state, int *cursor, int *select_begin, int *select_end,
const struct nk_style_property *style,
enum nk_property_filter filter, struct nk_input *in,
const struct nk_user_font *font, struct nk_text_edit *text_edit,
enum nk_button_behavior behavior)
{
const nk_plugin_filter filters[] = {
nk_filter_decimal,
nk_filter_float
};
int active, old;
int num_len, name_len;
char string[NK_MAX_NUMBER_BUFFER];
float size;
char *dst = 0;
int *length;
struct nk_rect left;
struct nk_rect right;
struct nk_rect label;
struct nk_rect edit;
struct nk_rect empty;
/* left decrement button */
left.h = font->height/2;
left.w = left.h;
left.x = property.x + style->border + style->padding.x;
left.y = property.y + style->border + property.h/2.0f - left.h/2;
/* text label */
name_len = nk_strlen(name);
size = font->width(font->userdata, font->height, name, name_len);
label.x = left.x + left.w + style->padding.x;
label.w = (float)size + 2 * style->padding.x;
label.y = property.y + style->border + style->padding.y;
label.h = property.h - (2 * style->border + 2 * style->padding.y);
/* right increment button */
right.y = left.y;
right.w = left.w;
right.h = left.h;
right.x = property.x + property.w - (right.w + style->padding.x);
/* edit */
if (*state == NK_PROPERTY_EDIT) {
size = font->width(font->userdata, font->height, buffer, *len);
size += style->edit.cursor_size;
length = len;
dst = buffer;
} else {
switch (variant->kind) {
default: break;
case NK_PROPERTY_INT:
nk_itoa(string, variant->value.i);
num_len = nk_strlen(string);
break;
case NK_PROPERTY_FLOAT:
NK_DTOA(string, (double)variant->value.f);
num_len = nk_string_float_limit(string, NK_MAX_FLOAT_PRECISION);
break;
case NK_PROPERTY_DOUBLE:
NK_DTOA(string, variant->value.d);
num_len = nk_string_float_limit(string, NK_MAX_FLOAT_PRECISION);
break;
}
size = font->width(font->userdata, font->height, string, num_len);
dst = string;
length = &num_len;
}
edit.w = (float)size + 2 * style->padding.x;
edit.w = NK_MIN(edit.w, right.x - (label.x + label.w));
edit.x = right.x - (edit.w + style->padding.x);
edit.y = property.y + style->border;
edit.h = property.h - (2 * style->border);
/* empty left space activator */
empty.w = edit.x - (label.x + label.w);
empty.x = label.x + label.w;
empty.y = property.y;
empty.h = property.h;
/* update property */
old = (*state == NK_PROPERTY_EDIT);
nk_property_behavior(ws, in, property, label, edit, empty, state, variant, inc_per_pixel);
/* draw property */
if (style->draw_begin) style->draw_begin(out, style->userdata);
nk_draw_property(out, style, &property, &label, *ws, name, name_len, font);
if (style->draw_end) style->draw_end(out, style->userdata);
/* execute right button */
if (nk_do_button_symbol(ws, out, left, style->sym_left, behavior, &style->dec_button, in, font)) {
switch (variant->kind) {
default: break;
case NK_PROPERTY_INT:
variant->value.i = NK_CLAMP(variant->min_value.i, variant->value.i - variant->step.i, variant->max_value.i); break;
case NK_PROPERTY_FLOAT:
variant->value.f = NK_CLAMP(variant->min_value.f, variant->value.f - variant->step.f, variant->max_value.f); break;
case NK_PROPERTY_DOUBLE:
variant->value.d = NK_CLAMP(variant->min_value.d, variant->value.d - variant->step.d, variant->max_value.d); break;
}
}
/* execute left button */
if (nk_do_button_symbol(ws, out, right, style->sym_right, behavior, &style->inc_button, in, font)) {
switch (variant->kind) {
default: break;
case NK_PROPERTY_INT:
variant->value.i = NK_CLAMP(variant->min_value.i, variant->value.i + variant->step.i, variant->max_value.i); break;
case NK_PROPERTY_FLOAT:
variant->value.f = NK_CLAMP(variant->min_value.f, variant->value.f + variant->step.f, variant->max_value.f); break;
case NK_PROPERTY_DOUBLE:
variant->value.d = NK_CLAMP(variant->min_value.d, variant->value.d + variant->step.d, variant->max_value.d); break;
}
}
if (old != NK_PROPERTY_EDIT && (*state == NK_PROPERTY_EDIT)) {
/* property has been activated so setup buffer */
NK_MEMCPY(buffer, dst, (nk_size)*length);
*cursor = nk_utf_len(buffer, *length);
*len = *length;
length = len;
dst = buffer;
active = 0;
} else active = (*state == NK_PROPERTY_EDIT);
/* execute and run text edit field */
nk_textedit_clear_state(text_edit, NK_TEXT_EDIT_SINGLE_LINE, filters[filter]);
text_edit->active = (unsigned char)active;
text_edit->string.len = *length;
text_edit->cursor = NK_CLAMP(0, *cursor, *length);
text_edit->select_start = NK_CLAMP(0,*select_begin, *length);
text_edit->select_end = NK_CLAMP(0,*select_end, *length);
text_edit->string.buffer.allocated = (nk_size)*length;
text_edit->string.buffer.memory.size = NK_MAX_NUMBER_BUFFER;
text_edit->string.buffer.memory.ptr = dst;
text_edit->string.buffer.size = NK_MAX_NUMBER_BUFFER;
text_edit->mode = NK_TEXT_EDIT_MODE_INSERT;
nk_do_edit(ws, out, edit, NK_EDIT_FIELD|NK_EDIT_AUTO_SELECT,
filters[filter], text_edit, &style->edit, (*state == NK_PROPERTY_EDIT) ? in: 0, font);
*length = text_edit->string.len;
*cursor = text_edit->cursor;
*select_begin = text_edit->select_start;
*select_end = text_edit->select_end;
if (text_edit->active && nk_input_is_key_pressed(in, NK_KEY_ENTER))
text_edit->active = nk_false;
if (active && !text_edit->active) {
/* property is now not active so convert edit text to value*/
*state = NK_PROPERTY_DEFAULT;
buffer[*len] = '\0';
switch (variant->kind) {
default: break;
case NK_PROPERTY_INT:
variant->value.i = nk_strtoi(buffer, 0);
variant->value.i = NK_CLAMP(variant->min_value.i, variant->value.i, variant->max_value.i);
break;
case NK_PROPERTY_FLOAT:
nk_string_float_limit(buffer, NK_MAX_FLOAT_PRECISION);
variant->value.f = nk_strtof(buffer, 0);
variant->value.f = NK_CLAMP(variant->min_value.f, variant->value.f, variant->max_value.f);
break;
case NK_PROPERTY_DOUBLE:
nk_string_float_limit(buffer, NK_MAX_FLOAT_PRECISION);
variant->value.d = nk_strtod(buffer, 0);
variant->value.d = NK_CLAMP(variant->min_value.d, variant->value.d, variant->max_value.d);
break;
}
}
}
NK_LIB struct nk_property_variant
nk_property_variant_int(int value, int min_value, int max_value, int step)
{
struct nk_property_variant result;
result.kind = NK_PROPERTY_INT;
result.value.i = value;
result.min_value.i = min_value;
result.max_value.i = max_value;
result.step.i = step;
return result;
}
NK_LIB struct nk_property_variant
nk_property_variant_float(float value, float min_value, float max_value, float step)
{
struct nk_property_variant result;
result.kind = NK_PROPERTY_FLOAT;
result.value.f = value;
result.min_value.f = min_value;
result.max_value.f = max_value;
result.step.f = step;
return result;
}
NK_LIB struct nk_property_variant
nk_property_variant_double(double value, double min_value, double max_value,
double step)
{
struct nk_property_variant result;
result.kind = NK_PROPERTY_DOUBLE;
result.value.d = value;
result.min_value.d = min_value;
result.max_value.d = max_value;
result.step.d = step;
return result;
}
NK_LIB void
nk_property(struct nk_context *ctx, const char *name, struct nk_property_variant *variant,
float inc_per_pixel, const enum nk_property_filter filter)
{
struct nk_window *win;
struct nk_panel *layout;
struct nk_input *in;
const struct nk_style *style;
struct nk_rect bounds;
enum nk_widget_layout_states s;
int *state = 0;
nk_hash hash = 0;
char *buffer = 0;
int *len = 0;
int *cursor = 0;
int *select_begin = 0;
int *select_end = 0;
int old_state;
char dummy_buffer[NK_MAX_NUMBER_BUFFER];
int dummy_state = NK_PROPERTY_DEFAULT;
int dummy_length = 0;
int dummy_cursor = 0;
int dummy_select_begin = 0;
int dummy_select_end = 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;
s = nk_widget(&bounds, ctx);
if (!s) return;
/* calculate hash from name */
if (name[0] == '#') {
hash = nk_murmur_hash(name, (int)nk_strlen(name), win->property.seq++);
name++; /* special number hash */
} else hash = nk_murmur_hash(name, (int)nk_strlen(name), 42);
/* check if property is currently hot item */
if (win->property.active && hash == win->property.name) {
buffer = win->property.buffer;
len = &win->property.length;
cursor = &win->property.cursor;
state = &win->property.state;
select_begin = &win->property.select_start;
select_end = &win->property.select_end;
} else {
buffer = dummy_buffer;
len = &dummy_length;
cursor = &dummy_cursor;
state = &dummy_state;
select_begin = &dummy_select_begin;
select_end = &dummy_select_end;
}
/* execute property widget */
old_state = *state;
ctx->text_edit.clip = ctx->clip;
in = ((s == NK_WIDGET_ROM && !win->property.active) ||
layout->flags & NK_WINDOW_ROM) ? 0 : &ctx->input;
nk_do_property(&ctx->last_widget_state, &win->buffer, bounds, name,
variant, inc_per_pixel, buffer, len, state, cursor, select_begin,
select_end, &style->property, filter, in, style->font, &ctx->text_edit,
ctx->button_behavior);
if (in && *state != NK_PROPERTY_DEFAULT && !win->property.active) {
/* current property is now hot */
win->property.active = 1;
NK_MEMCPY(win->property.buffer, buffer, (nk_size)*len);
win->property.length = *len;
win->property.cursor = *cursor;
win->property.state = *state;
win->property.name = hash;
win->property.select_start = *select_begin;
win->property.select_end = *select_end;
if (*state == NK_PROPERTY_DRAG) {
ctx->input.mouse.grab = nk_true;
ctx->input.mouse.grabbed = nk_true;
}
}
/* check if previously active property is now inactive */
if (*state == NK_PROPERTY_DEFAULT && old_state != NK_PROPERTY_DEFAULT) {
if (old_state == NK_PROPERTY_DRAG) {
ctx->input.mouse.grab = nk_false;
ctx->input.mouse.grabbed = nk_false;
ctx->input.mouse.ungrab = nk_true;
}
win->property.select_start = 0;
win->property.select_end = 0;
win->property.active = 0;
}
}
NK_API void
nk_property_int(struct nk_context *ctx, const char *name,
int min, int *val, int max, int step, float inc_per_pixel)
{
struct nk_property_variant variant;
NK_ASSERT(ctx);
NK_ASSERT(name);
NK_ASSERT(val);
if (!ctx || !ctx->current || !name || !val) return;
variant = nk_property_variant_int(*val, min, max, step);
nk_property(ctx, name, &variant, inc_per_pixel, NK_FILTER_INT);
*val = variant.value.i;
}
NK_API void
nk_property_float(struct nk_context *ctx, const char *name,
float min, float *val, float max, float step, float inc_per_pixel)
{
struct nk_property_variant variant;
NK_ASSERT(ctx);
NK_ASSERT(name);
NK_ASSERT(val);
if (!ctx || !ctx->current || !name || !val) return;
variant = nk_property_variant_float(*val, min, max, step);
nk_property(ctx, name, &variant, inc_per_pixel, NK_FILTER_FLOAT);
*val = variant.value.f;
}
NK_API void
nk_property_double(struct nk_context *ctx, const char *name,
double min, double *val, double max, double step, float inc_per_pixel)
{
struct nk_property_variant variant;
NK_ASSERT(ctx);
NK_ASSERT(name);
NK_ASSERT(val);
if (!ctx || !ctx->current || !name || !val) return;
variant = nk_property_variant_double(*val, min, max, step);
nk_property(ctx, name, &variant, inc_per_pixel, NK_FILTER_FLOAT);
*val = variant.value.d;
}
NK_API int
nk_propertyi(struct nk_context *ctx, const char *name, int min, int val,
int max, int step, float inc_per_pixel)
{
struct nk_property_variant variant;
NK_ASSERT(ctx);
NK_ASSERT(name);
if (!ctx || !ctx->current || !name) return val;
variant = nk_property_variant_int(val, min, max, step);
nk_property(ctx, name, &variant, inc_per_pixel, NK_FILTER_INT);
val = variant.value.i;
return val;
}
NK_API float
nk_propertyf(struct nk_context *ctx, const char *name, float min,
float val, float max, float step, float inc_per_pixel)
{
struct nk_property_variant variant;
NK_ASSERT(ctx);
NK_ASSERT(name);
if (!ctx || !ctx->current || !name) return val;
variant = nk_property_variant_float(val, min, max, step);
nk_property(ctx, name, &variant, inc_per_pixel, NK_FILTER_FLOAT);
val = variant.value.f;
return val;
}
NK_API double
nk_propertyd(struct nk_context *ctx, const char *name, double min,
double val, double max, double step, float inc_per_pixel)
{
struct nk_property_variant variant;
NK_ASSERT(ctx);
NK_ASSERT(name);
if (!ctx || !ctx->current || !name) return val;
variant = nk_property_variant_double(val, min, max, step);
nk_property(ctx, name, &variant, inc_per_pixel, NK_FILTER_FLOAT);
val = variant.value.d;
return val;
}
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