ref: f0f44fdb991b775ca0e10ac68cad0a94114ef93d
dir: /src/microui.c/
/*
** Copyright (c) 2018 rxi
**
** Permission is hereby granted, free of charge, to any person obtaining a copy
** of this software and associated documentation files (the "Software"), to
** deal in the Software without restriction, including without limitation the
** rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
** sell copies of the Software, and to permit persons to whom the Software is
** furnished to do so, subject to the following conditions:
**
** The above copyright notice and this permission notice shall be included in
** all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
** AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
** FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
** IN THE SOFTWARE.
*/
#include <stdio.h>
#include <string.h>
#include "microui.h"
#define unused(x) ((void) (x))
#define expect(x) do { \
if (!(x)) { \
fprintf(stderr, "Fatal error: %s:%d: assertion '%s' failed\n", \
__FILE__, __LINE__, #x); \
abort(); \
} \
} while (0)
#define push(stk, val) do { \
expect((stk).idx < (int) (sizeof((stk).items) / sizeof(*(stk).items))); \
(stk).items[ (stk).idx ] = (val); \
(stk).idx++; \
} while (0)
#define pop(stk) do { \
expect((stk).idx > 0); \
(stk).idx--; \
} while (0)
static mu_Rect unclipped_rect = { 0, 0, 0x1000000, 0x1000000 };
static mu_Style default_style = {
NULL, /* font */
{ 68, 10 }, /* size */
6, 4, 24, /* padding, spacing, indent */
26, 20, /* title_height, footer_height */
12, 8, /* scrollbar_size, thumb_size */
{
{ 230, 230, 230, 255 }, /* MU_COLOR_TEXT */
{ 20, 20, 20, 200 }, /* MU_COLOR_BORDER */
{ 50, 50, 50, 255 }, /* MU_COLOR_WINDOWBG */
{ 20, 20, 20, 255 }, /* MU_COLOR_TITLEBG */
{ 240, 240, 240, 255 }, /* MU_COLOR_TITLETEXT */
{ 0, 0, 0, 0 }, /* MU_COLOR_PANELBG */
{ 75, 75, 75, 255 }, /* MU_COLOR_BUTTON */
{ 95, 95, 95, 255 }, /* MU_COLOR_BUTTONHOVER */
{ 115, 115, 115, 255 }, /* MU_COLOR_BUTTONFOCUS */
{ 30, 30, 30, 255 }, /* MU_COLOR_BASE */
{ 35, 35, 35, 255 }, /* MU_COLOR_BASEHOVER */
{ 40, 40, 40, 255 }, /* MU_COLOR_BASEFOCUS */
{ 30, 30, 30, 255 }, /* MU_COLOR_SCROLLBASE */
{ 80, 80, 80, 255 } /* MU_COLOR_SCROLLTHUMB */
}
};
mu_Vec2 mu_vec2(int x, int y) {
mu_Vec2 res;
res.x = x, res.y = y;
return res;
}
mu_Rect mu_rect(int x, int y, int w, int h) {
mu_Rect res;
res.x = x, res.y = y, res.w = w, res.h = h;
return res;
}
mu_Color mu_color(int r, int g, int b, int a) {
mu_Color res;
res.r = r, res.g = g, res.b = b, res.a = a;
return res;
}
static mu_Rect expand_rect(mu_Rect rect, int n) {
return mu_rect(rect.x - n, rect.y - n, rect.w + n * 2, rect.h + n * 2);
}
static mu_Rect clip_rect(mu_Rect rect, mu_Rect clip) {
int x1 = rect.x + rect.w;
int y1 = rect.y + rect.h;
int x2 = clip.x + clip.w;
int y2 = clip.y + clip.h;
rect.x = mu_max(rect.x, clip.x);
rect.y = mu_max(rect.y, clip.y);
rect.w = mu_min(x1, x2) - rect.x;
rect.h = mu_min(y1, y2) - rect.y;
rect.w = mu_max(0, rect.w);
rect.h = mu_max(0, rect.h);
return rect;
}
static int rect_overlaps_vec2(mu_Rect r, mu_Vec2 p) {
return p.x >= r.x && p.x < r.x + r.w && p.y >= r.y && p.y < r.y + r.h;
}
static int text_width(mu_Font font, const char *str, int len) {
unused(font);
if (len < 0) { len = strlen(str); }
return len * 8;
}
static int text_height(mu_Font font) {
unused(font);
return 16;
}
static void draw_frame(mu_Context *ctx, mu_Rect rect, int colorid) {
mu_draw_rect(ctx, rect, ctx->style->colors[colorid]);
if (colorid == MU_COLOR_SCROLLBASE ||
colorid == MU_COLOR_SCROLLTHUMB ||
colorid == MU_COLOR_TITLEBG) { return; }
/* draw border */
if (ctx->style->colors[MU_COLOR_BORDER].a) {
mu_draw_box(ctx, expand_rect(rect, 1), ctx->style->colors[MU_COLOR_BORDER]);
}
}
void mu_init(mu_Context *ctx) {
memset(ctx, 0, sizeof(*ctx));
ctx->text_width = text_width;
ctx->text_height = text_height;
ctx->draw_frame = draw_frame;
ctx->_style = default_style;
ctx->style = &ctx->_style;
}
void mu_begin(mu_Context *ctx) {
ctx->command_list.idx = 0;
ctx->root_list.idx = 0;
ctx->scroll_target = NULL;
ctx->last_hover_root = ctx->hover_root;
ctx->hover_root = NULL;
ctx->mouse_delta.x = ctx->mouse_pos.x - ctx->last_mouse_pos.x;
ctx->mouse_delta.y = ctx->mouse_pos.y - ctx->last_mouse_pos.y;
}
static int compare_zindex(const void *a, const void *b) {
return (*(mu_Container**) a)->zindex - (*(mu_Container**) b)->zindex;
}
void mu_end(mu_Context *ctx) {
int i, n;
/* check stacks */
expect(ctx->container_stack.idx == 0);
expect(ctx->clip_stack.idx == 0);
expect(ctx->id_stack.idx == 0);
expect(ctx->layout_stack.idx == 0);
/* handle mouse wheel scrolling */
if (ctx->scroll_target && ctx->mouse_wheel) {
ctx->scroll_target->scroll.y -= ctx->mouse_wheel * 30;
}
/* unset focus if focus id was not touched this frame */
if (!ctx->updated_focus) { ctx->focus = 0; }
ctx->updated_focus = 0;
/* bring hover root to front if mouse was pressed */
if (ctx->mouse_pressed && ctx->hover_root &&
ctx->hover_root->zindex < ctx->last_zindex)
{
mu_bring_to_front(ctx, ctx->hover_root);
}
/* reset input state */
ctx->key_pressed = 0;
ctx->text_input[0] = '\0';
ctx->mouse_pressed = 0;
ctx->mouse_wheel = 0;
ctx->last_mouse_pos = ctx->mouse_pos;
/* sort root containers by zindex */
n = ctx->root_list.idx;
qsort(ctx->root_list.items, n, sizeof(mu_Container*), compare_zindex);
/* set root container jump commands */
for (i = 0; i < n; i++) {
mu_Container *cnt = ctx->root_list.items[i];
/* if this is the first container then make the first command jump to it.
** otherwise set the previous container's tail to jump to this one */
if (i == 0) {
mu_Command *cmd = (mu_Command*) ctx->command_list.items;
cmd->jump.dst = (char*) cnt->head + sizeof(mu_JumpCommand);
} else {
mu_Container *prev = ctx->root_list.items[i - 1];
prev->tail->jump.dst = (char*) cnt->head + sizeof(mu_JumpCommand);
}
/* make the last container's tail jump to the end of command list */
if (i == n - 1) {
cnt->tail->jump.dst = ctx->command_list.items + ctx->command_list.idx;
}
}
}
void mu_set_focus(mu_Context *ctx, mu_Id id) {
ctx->focus = id;
ctx->updated_focus = 1;
}
/* 32bit fnv-1a hash */
#define MU_HASH_SEED 2166136261
static void hash(mu_Id *hash, const void *data, int size) {
const unsigned char *p = data;
while (size--) {
*hash = (*hash ^ *p++) * 16777619;
}
}
mu_Id mu_get_id(mu_Context *ctx, const void *data, int size) {
int idx = ctx->id_stack.idx;
mu_Id res = (idx > 0) ? ctx->id_stack.items[idx - 1] : MU_HASH_SEED;
hash(&res, data, size);
ctx->last_id = res;
return res;
}
void mu_push_id(mu_Context *ctx, const void *data, int size) {
push(ctx->id_stack, mu_get_id(ctx, data, size));
}
void mu_pop_id(mu_Context *ctx) {
pop(ctx->id_stack);
}
void mu_push_clip_rect(mu_Context *ctx, mu_Rect rect) {
mu_Rect last = mu_get_clip_rect(ctx);
push(ctx->clip_stack, clip_rect(rect, last));
}
void mu_pop_clip_rect(mu_Context *ctx) {
pop(ctx->clip_stack);
}
mu_Rect mu_get_clip_rect(mu_Context *ctx) {
expect(ctx->clip_stack.idx > 0);
return ctx->clip_stack.items[ ctx->clip_stack.idx - 1 ];
}
int mu_check_clip(mu_Context *ctx, mu_Rect r) {
mu_Rect cr = mu_get_clip_rect(ctx);
if (r.x > cr.x + cr.w || r.x + r.w < cr.x ||
r.y > cr.y + cr.h || r.y + r.h < cr.y ) { return MU_CLIP_ALL; }
if (r.x >= cr.x && r.x + r.w <= cr.x + cr.w &&
r.y >= cr.y && r.y + r.h <= cr.y + cr.h ) { return MU_CLIP_NONE; }
return MU_CLIP_PART;
}
static void push_layout(mu_Context *ctx, mu_Rect body, mu_Vec2 scroll) {
mu_Layout layout;
int width = 0;
memset(&layout, 0, sizeof(mu_Layout));
layout.body = body;
layout.body.x -= scroll.x;
layout.body.y -= scroll.y;
layout.max = mu_vec2(-0x1000000, -0x1000000);
push(ctx->layout_stack, layout);
mu_layout_row(ctx, 1, &width, 0);
}
static mu_Layout* get_layout(mu_Context *ctx) {
return &ctx->layout_stack.items[ctx->layout_stack.idx - 1];
}
static void push_container(mu_Context *ctx, mu_Container *cnt) {
push(ctx->container_stack, cnt);
mu_push_id(ctx, &cnt, sizeof(mu_Container*));
cnt->body = cnt->rect;
}
static void pop_container(mu_Context *ctx) {
mu_Container *cnt = mu_get_container(ctx);
mu_Layout *layout = get_layout(ctx);
cnt->last_body = cnt->body;
cnt->content_size.x = layout->max.x - layout->body.x;
cnt->content_size.y = layout->max.y - layout->body.y;
/* pop container, layout and id */
pop(ctx->container_stack);
pop(ctx->layout_stack);
mu_pop_id(ctx);
}
mu_Container* mu_get_container(mu_Context *ctx) {
expect(ctx->container_stack.idx > 0);
return ctx->container_stack.items[ ctx->container_stack.idx - 1 ];
}
void mu_init_window(mu_Context *ctx, mu_Container *cnt, int opt) {
memset(cnt, 0, sizeof(*cnt));
cnt->inited = 1;
cnt->open = opt & MU_OPT_CLOSED ? 0 : 1;
cnt->rect = mu_rect(100, 100, 300, 300);
mu_bring_to_front(ctx, cnt);
}
void mu_bring_to_front(mu_Context *ctx, mu_Container *cnt) {
cnt->zindex = ++ctx->last_zindex;
}
/*============================================================================
** input handlers
**============================================================================*/
void mu_input_mousemove(mu_Context *ctx, int x, int y) {
ctx->mouse_pos = mu_vec2(x, y);
}
void mu_input_mousedown(mu_Context *ctx, int x, int y, int btn) {
mu_input_mousemove(ctx, x, y);
ctx->mouse_down |= btn;
ctx->mouse_pressed |= btn;
}
void mu_input_mouseup(mu_Context *ctx, int x, int y, int btn) {
mu_input_mousemove(ctx, x, y);
ctx->mouse_down &= ~btn;
}
void mu_input_mousewheel(mu_Context *ctx, int y) {
ctx->mouse_wheel += y;
}
void mu_input_keydown(mu_Context *ctx, int key) {
ctx->key_pressed |= key;
ctx->key_down |= key;
}
void mu_input_keyup(mu_Context *ctx, int key) {
ctx->key_down &= ~key;
}
void mu_input_text(mu_Context *ctx, const char *text) {
int len = strlen(ctx->text_input);
int size = strlen(text) + 1;
expect(len + size <= (int) sizeof(ctx->text_input));
memcpy(ctx->text_input + len, text, size);
}
/*============================================================================
** commandlist
**============================================================================*/
mu_Command* mu_push_command(mu_Context *ctx, int type, int size) {
mu_Command *cmd = (mu_Command*) (ctx->command_list.items + ctx->command_list.idx);
expect(ctx->command_list.idx + size < MU_COMMANDLIST_SIZE);
cmd->base.type = type;
cmd->base.size = size;
ctx->command_list.idx += size;
return cmd;
}
int mu_next_command(mu_Context *ctx, mu_Command **cmd) {
if (*cmd) {
*cmd = (mu_Command*) (((char*) *cmd) + (*cmd)->base.size);
} else {
*cmd = (mu_Command*) ctx->command_list.items;
}
while ((char*) *cmd != ctx->command_list.items + ctx->command_list.idx) {
if ((*cmd)->type != MU_COMMAND_JUMP) { return 1; }
*cmd = (*cmd)->jump.dst;
}
return 0;
}
static mu_Command* push_jump(mu_Context *ctx, mu_Command *dst) {
mu_Command *cmd;
cmd = mu_push_command(ctx, MU_COMMAND_JUMP, sizeof(mu_JumpCommand));
cmd->jump.dst = dst;
return cmd;
}
void mu_set_clip(mu_Context *ctx, mu_Rect rect) {
mu_Command *cmd;
cmd = mu_push_command(ctx, MU_COMMAND_CLIP, sizeof(mu_ClipCommand));
cmd->clip.rect = rect;
}
void mu_draw_rect(mu_Context *ctx, mu_Rect rect, mu_Color color) {
mu_Command *cmd;
rect = clip_rect(rect, mu_get_clip_rect(ctx));
if (rect.w > 0 && rect.h > 0) {
cmd = mu_push_command(ctx, MU_COMMAND_RECT, sizeof(mu_RectCommand));
cmd->rect.rect = rect;
cmd->rect.color = color;
}
}
void mu_draw_box(mu_Context *ctx, mu_Rect rect, mu_Color color) {
mu_draw_rect(ctx, mu_rect(rect.x + 1, rect.y, rect.w - 2, 1), color);
mu_draw_rect(ctx, mu_rect(rect.x+1, rect.y + rect.h-1, rect.w-2, 1), color);
mu_draw_rect(ctx, mu_rect(rect.x, rect.y, 1, rect.h), color);
mu_draw_rect(ctx, mu_rect(rect.x + rect.w - 1, rect.y, 1, rect.h), color);
}
void mu_draw_text(mu_Context *ctx, mu_Font font, const char *str, int len,
mu_Vec2 pos, mu_Color color)
{
mu_Command *cmd;
mu_Rect rect = mu_rect(
pos.x, pos.y, ctx->text_width(font, str, len), ctx->text_height(font));
int clipped = mu_check_clip(ctx, rect);
if (clipped == MU_CLIP_ALL ) { return; }
if (clipped == MU_CLIP_PART) { mu_set_clip(ctx, mu_get_clip_rect(ctx)); }
/* add command */
if (len < 0) { len = strlen(str); }
cmd = mu_push_command(ctx, MU_COMMAND_TEXT, sizeof(mu_TextCommand) + len);
memcpy(cmd->text.str, str, len);
cmd->text.str[len] = '\0';
cmd->text.pos = pos;
cmd->text.color = color;
cmd->text.font = font;
/* reset clipping if it was set */
if (clipped) { mu_set_clip(ctx, unclipped_rect); }
}
void mu_draw_icon(mu_Context *ctx, int id, mu_Rect rect, mu_Color color) {
mu_Command *cmd;
/* do clip command if the rect isn't fully contained within the cliprect */
int clipped = mu_check_clip(ctx, rect);
if (clipped == MU_CLIP_ALL ) { return; }
if (clipped == MU_CLIP_PART) { mu_set_clip(ctx, mu_get_clip_rect(ctx)); }
/* do icon command */
cmd = mu_push_command(ctx, MU_COMMAND_ICON, sizeof(mu_IconCommand));
cmd->icon.id = id;
cmd->icon.rect = rect;
cmd->icon.color = color;
/* reset clipping if it was set */
if (clipped) { mu_set_clip(ctx, unclipped_rect); }
}
/*============================================================================
** layout
**============================================================================*/
enum { RELATIVE = 1, ABSOLUTE = 2 };
void mu_layout_begin_column(mu_Context *ctx) {
push_layout(ctx, mu_layout_next(ctx), mu_vec2(0, 0));
}
void mu_layout_end_column(mu_Context *ctx) {
mu_Layout *a, *b;
b = get_layout(ctx);
pop(ctx->layout_stack);
/* inherit position/next_row/max from child layout if they are greater */
a = get_layout(ctx);
a->position.x = mu_max(a->position.x, b->position.x + b->body.x - a->body.x);
a->next_row = mu_max(a->next_row, b->next_row + b->body.y - a->body.y);
a->max.x = mu_max(a->max.x, b->max.x);
a->max.y = mu_max(a->max.y, b->max.y);
}
void mu_layout_row(mu_Context *ctx, int items, const int *widths, int height) {
mu_Layout *layout = get_layout(ctx);
if (widths) {
expect(items <= MU_MAX_WIDTHS);
memcpy(layout->widths, widths, items * sizeof(widths[0]));
}
layout->items = items;
layout->position = mu_vec2(layout->indent, layout->next_row);
layout->size.y = height;
layout->row_index = 0;
}
void mu_layout_width(mu_Context *ctx, int width) {
get_layout(ctx)->size.x = width;
}
void mu_layout_height(mu_Context *ctx, int height) {
get_layout(ctx)->size.y = height;
}
void mu_layout_set_next(mu_Context *ctx, mu_Rect r, int relative) {
mu_Layout *layout = get_layout(ctx);
layout->next = r;
layout->next_type = relative ? RELATIVE : ABSOLUTE;
}
mu_Rect mu_layout_next(mu_Context *ctx) {
mu_Layout *layout = get_layout(ctx);
mu_Style *style = ctx->style;
mu_Rect res;
if (layout->next_type) {
/* handle rect set by `mu_layout_set_next` */
int type = layout->next_type;
layout->next_type = 0;
res = layout->next;
if (type == ABSOLUTE) { return res; }
} else {
/* handle next row */
if (layout->row_index == layout->items) {
mu_layout_row(ctx, layout->items, NULL, layout->size.y);
}
/* position */
res.x = layout->position.x;
res.y = layout->position.y;
/* size */
res.w =
layout->items > -1 ? layout->widths[layout->row_index] : layout->size.x;
res.h = layout->size.y;
if (res.w == 0) { res.w = style->size.x + style->padding * 2; }
if (res.h == 0) { res.h = style->size.y + style->padding * 2; }
if (res.w < 0) { res.w += layout->body.w - res.x + 1; }
if (res.h < 0) { res.h += layout->body.h - res.y + 1; }
layout->row_index++;
}
/* update position */
layout->position.x += res.w + style->spacing;
layout->next_row = mu_max(layout->next_row, res.y + res.h + style->spacing);
/* apply body offset */
res.x += layout->body.x;
res.y += layout->body.y;
/* update max position */
layout->max.x = mu_max(layout->max.x, res.x + res.w);
layout->max.y = mu_max(layout->max.y, res.y + res.h);
return (ctx->last_rect = res);
}
/*============================================================================
** controls
**============================================================================*/
static int in_hover_root(mu_Context *ctx) {
int i = ctx->container_stack.idx;
while (i--) {
if (ctx->container_stack.items[i] == ctx->last_hover_root) { return 1; }
/* only root containers have their `head` field set; stop searching if we've
** reached the current root container */
if (ctx->container_stack.items[i]->head) { break; }
}
return 0;
}
void mu_draw_control_frame(mu_Context *ctx, mu_Id id, mu_Rect rect,
int colorid, int opt)
{
if (opt & MU_OPT_NOFRAME) { return; }
colorid += (ctx->focus == id) ? 2 : (ctx->hover == id) ? 1 : 0;
ctx->draw_frame(ctx, rect, colorid);
}
void mu_draw_control_text(mu_Context *ctx, const char *str, mu_Rect rect,
int colorid, int opt)
{
mu_Vec2 pos;
mu_Font font = ctx->style->font;
int tw = ctx->text_width(font, str, -1);
mu_push_clip_rect(ctx, rect);
pos.y = rect.y + (rect.h - ctx->text_height(font)) / 2;
if (opt & MU_OPT_ALIGNCENTER) {
pos.x = rect.x + (rect.w - tw) / 2;
} else if (opt & MU_OPT_ALIGNRIGHT) {
pos.x = rect.x + rect.w - tw - ctx->style->padding;
} else {
pos.x = rect.x + ctx->style->padding;
}
mu_draw_text(ctx, font, str, -1, pos, ctx->style->colors[colorid]);
mu_pop_clip_rect(ctx);
}
int mu_mouse_over(mu_Context *ctx, mu_Rect rect) {
return rect_overlaps_vec2(rect, ctx->mouse_pos) &&
rect_overlaps_vec2(mu_get_clip_rect(ctx), ctx->mouse_pos) &&
in_hover_root(ctx);
}
void mu_update_control(mu_Context *ctx, mu_Id id, mu_Rect rect, int opt) {
int mouseover = mu_mouse_over(ctx, rect);
if (ctx->focus == id) { ctx->updated_focus = 1; }
if (opt & MU_OPT_NOINTERACT) { return; }
if (mouseover && !ctx->mouse_down) { ctx->hover = id; }
if (ctx->focus == id) {
if (ctx->mouse_pressed && !mouseover) { mu_set_focus(ctx, 0); }
if (!ctx->mouse_down && ~opt & MU_OPT_HOLDFOCUS) { mu_set_focus(ctx, 0); }
}
if (ctx->hover == id) {
if (!mouseover) {
ctx->hover = 0;
} else if (ctx->mouse_pressed) {
mu_set_focus(ctx, id);
}
}
}
void mu_text(mu_Context *ctx, const char *text) {
const char *start, *end, *p = text;
int width = -1;
mu_Font font = ctx->style->font;
mu_Color color = ctx->style->colors[MU_COLOR_TEXT];
mu_layout_begin_column(ctx);
mu_layout_row(ctx, 1, &width, ctx->text_height(font));
do {
mu_Rect r = mu_layout_next(ctx);
int w = 0;
start = end = p;
do {
const char* word = p;
while (*p && *p != ' ' && *p != '\n') { p++; }
w += ctx->text_width(font, word, p - word);
if (w > r.w && end != start) { break; }
w += ctx->text_width(font, p, 1);
end = p++;
} while (*end && *end != '\n');
mu_draw_text(ctx, font, start, end - start, mu_vec2(r.x, r.y), color);
p = end + 1;
} while (*end);
mu_layout_end_column(ctx);
}
void mu_label(mu_Context *ctx, const char *text) {
mu_draw_control_text(ctx, text, mu_layout_next(ctx), MU_COLOR_TEXT, 0);
}
int mu_button_ex(mu_Context *ctx, const char *label, int icon, int opt) {
int res = 0;
mu_Id id = label ? mu_get_id(ctx, label, strlen(label))
: mu_get_id(ctx, &icon, sizeof(icon));
mu_Rect r = mu_layout_next(ctx);
mu_update_control(ctx, id, r, opt);
/* handle click */
if (ctx->mouse_pressed == MU_MOUSE_LEFT && ctx->focus == id) {
res |= MU_RES_SUBMIT;
}
/* draw */
mu_draw_control_frame(ctx, id, r, MU_COLOR_BUTTON, opt);
if (label) { mu_draw_control_text(ctx, label, r, MU_COLOR_TEXT, opt); }
if (icon) { mu_draw_icon(ctx, icon, r, ctx->style->colors[MU_COLOR_TEXT]); }
return res;
}
int mu_button(mu_Context *ctx, const char *label) {
return mu_button_ex(ctx, label, 0, MU_OPT_ALIGNCENTER);
}
int mu_checkbox(mu_Context *ctx, int *state, const char *label) {
int res = 0;
mu_Id id = mu_get_id(ctx, &state, sizeof(state));
mu_Rect r = mu_layout_next(ctx);
mu_Rect box = mu_rect(r.x, r.y, r.h, r.h);
mu_update_control(ctx, id, r, 0);
/* handle click */
if (ctx->mouse_pressed == MU_MOUSE_LEFT && ctx->focus == id) {
res |= MU_RES_CHANGE;
*state = !*state;
}
/* draw */
mu_draw_control_frame(ctx, id, box, MU_COLOR_BASE, 0);
if (*state) {
mu_draw_icon(ctx, MU_ICON_CHECK, box, ctx->style->colors[MU_COLOR_TEXT]);
}
r = mu_rect(r.x + box.w, r.y, r.w - box.w, r.h);
mu_draw_control_text(ctx, label, r, MU_COLOR_TEXT, 0);
return res;
}
int mu_textbox_raw(mu_Context *ctx, char *buf, int bufsz, mu_Id id, mu_Rect r,
int opt)
{
int res = 0;
mu_update_control(ctx, id, r, opt | MU_OPT_HOLDFOCUS);
if (ctx->focus == id) {
/* handle text input */
int len = strlen(buf);
int n = mu_min(bufsz - len - 1, (int) strlen(ctx->text_input));
if (n > 0) {
memcpy(buf + len, ctx->text_input, n);
len += n;
buf[len] = '\0';
res |= MU_RES_CHANGE;
}
/* handle backspace */
if (ctx->key_pressed & MU_KEY_BACKSPACE && len > 0) {
/* skip utf-8 continuation bytes */
while ((buf[--len] & 0xc0) == 0x80 && len > 0);
buf[len] = '\0';
res |= MU_RES_CHANGE;
}
/* handle return */
if (ctx->key_pressed & MU_KEY_RETURN) {
mu_set_focus(ctx, 0);
res |= MU_RES_SUBMIT;
}
}
/* draw */
mu_draw_control_frame(ctx, id, r, MU_COLOR_BASE, opt);
if (ctx->focus == id) {
mu_Color color = ctx->style->colors[MU_COLOR_TEXT];
mu_Font font = ctx->style->font;
int textw = ctx->text_width(font, buf, -1);
int texth = ctx->text_height(font);
int ofx = r.w - ctx->style->padding - textw - 1;
int textx = r.x + mu_min(ofx, ctx->style->padding);
int texty = r.y + (r.h - texth) / 2;
mu_push_clip_rect(ctx, r);
mu_draw_text(ctx, font, buf, -1, mu_vec2(textx, texty), color);
mu_draw_rect(ctx, mu_rect(textx + textw, texty, 1, texth), color);
mu_pop_clip_rect(ctx);
} else {
mu_draw_control_text(ctx, buf, r, MU_COLOR_TEXT, opt);
}
return res;
}
static int number_textbox(mu_Context *ctx, mu_Real *value, mu_Rect r, mu_Id id) {
if (ctx->mouse_pressed == MU_MOUSE_LEFT &&
ctx->key_down & MU_KEY_SHIFT &&
ctx->hover == id)
{
ctx->number_editing = id;
sprintf(ctx->number_buf, MU_REAL_FMT, *value);
}
if (ctx->number_editing == id) {
int res = mu_textbox_raw(
ctx, ctx->number_buf, sizeof(ctx->number_buf), id, r, 0);
if (res & MU_RES_SUBMIT || ctx->focus != id) {
*value = strtod(ctx->number_buf, NULL);
ctx->number_editing = 0;
} else {
return 1;
}
}
return 0;
}
int mu_textbox_ex(mu_Context *ctx, char *buf, int bufsz, int opt) {
mu_Id id = mu_get_id(ctx, &buf, sizeof(buf));
mu_Rect r = mu_layout_next(ctx);
return mu_textbox_raw(ctx, buf, bufsz, id, r, opt);
}
int mu_textbox(mu_Context *ctx, char *buf, int bufsz) {
return mu_textbox_ex(ctx, buf, bufsz, 0);
}
int mu_slider_ex(mu_Context *ctx, mu_Real *value, mu_Real low, mu_Real high,
mu_Real step, const char *fmt, int opt)
{
char buf[MU_MAX_FMT + 1];
mu_Rect thumb;
int w, res = 0;
mu_Real normalized, last = *value, v = last;
mu_Id id = mu_get_id(ctx, &value, sizeof(value));
mu_Rect base = mu_layout_next(ctx);
/* handle text input mode */
if (number_textbox(ctx, &v, base, id)) { return res; }
/* handle normal mode */
mu_update_control(ctx, id, base, opt);
/* handle input */
if (ctx->focus == id && ctx->mouse_down == MU_MOUSE_LEFT) {
v = low + ((mu_Real) (ctx->mouse_pos.x - base.x) / base.w) * (high - low);
if (step) { v = ((long) ((v + step/2) / step)) * step; }
}
/* clamp and store value, update res */
*value = v = mu_clamp(v, low, high);
if (last != v) { res |= MU_RES_CHANGE; }
/* draw base */
mu_draw_control_frame(ctx, id, base, MU_COLOR_BASE, opt);
/* draw thumb */
w = ctx->style->thumb_size;
normalized = (v - low) / (high - low);
thumb = mu_rect(base.x + normalized * (base.w - w), base.y, w, base.h);
mu_draw_control_frame(ctx, id, thumb, MU_COLOR_BUTTON, opt);
/* draw text */
sprintf(buf, fmt, v);
mu_draw_control_text(ctx, buf, base, MU_COLOR_TEXT, opt);
return res;
}
int mu_slider(mu_Context *ctx, mu_Real *value, mu_Real low, mu_Real high) {
return mu_slider_ex(ctx, value, low, high, 0, MU_SLIDER_FMT, MU_OPT_ALIGNCENTER);
}
int mu_number_ex(mu_Context *ctx, mu_Real *value, mu_Real step,
const char *fmt,int opt)
{
char buf[MU_MAX_FMT + 1];
int res = 0;
mu_Id id = mu_get_id(ctx, &value, sizeof(value));
mu_Rect base = mu_layout_next(ctx);
mu_Real last = *value;
/* handle text input mode */
if (number_textbox(ctx, value, base, id)) { return res; }
/* handle normal mode */
mu_update_control(ctx, id, base, opt);
/* handle input */
if (ctx->focus == id && ctx->mouse_down == MU_MOUSE_LEFT) {
*value += ctx->mouse_delta.x * step;
}
/* set flag if value changed */
if (*value != last) { res |= MU_RES_CHANGE; }
/* draw base */
mu_draw_control_frame(ctx, id, base, MU_COLOR_BASE, opt);
/* draw text */
sprintf(buf, fmt, *value);
mu_draw_control_text(ctx, buf, base, MU_COLOR_TEXT, opt);
return res;
}
int mu_number(mu_Context *ctx, mu_Real *value, mu_Real step) {
return mu_number_ex(ctx, value, step, "%.03f", MU_OPT_ALIGNCENTER);
}
static int header(mu_Context *ctx, int *state, const char *label,
int istreenode)
{
mu_Rect r;
mu_Id id;
int width = -1;
mu_layout_row(ctx, 1, &width, 0);
r = mu_layout_next(ctx);
id = mu_get_id(ctx, &state, sizeof(state));
mu_update_control(ctx, id, r, 0);
/* handle click */
if (ctx->mouse_pressed == MU_MOUSE_LEFT && ctx->focus == id) {
*state = !(*state);
}
/* draw */
if (istreenode) {
if (ctx->hover == id) { ctx->draw_frame(ctx, r, MU_COLOR_BUTTONHOVER); }
} else {
mu_draw_control_frame(ctx, id, r, MU_COLOR_BUTTON, 0);
}
mu_draw_icon(
ctx, *state ? MU_ICON_EXPANDED : MU_ICON_COLLAPSED,
mu_rect(r.x, r.y, r.h, r.h), ctx->style->colors[MU_COLOR_TEXT]);
r.x += r.h - ctx->style->padding;
r.w -= r.h - ctx->style->padding;
mu_draw_control_text(ctx, label, r, MU_COLOR_TEXT, 0);
return *state ? MU_RES_ACTIVE : 0;
}
int mu_header(mu_Context *ctx, int *state, const char *label) {
return header(ctx, state, label, 0);
}
int mu_begin_treenode(mu_Context *ctx, int *state, const char *label) {
int res = header(ctx, state, label, 1);
if (res & MU_RES_ACTIVE) {
get_layout(ctx)->indent += ctx->style->indent;
mu_push_id(ctx, &state, sizeof(void*));
}
return res;
}
void mu_end_treenode(mu_Context *ctx) {
get_layout(ctx)->indent -= ctx->style->indent;
mu_pop_id(ctx);
}
#define scrollbar(ctx, cnt, b, cs, x, y, w, h) \
do { \
/* only add scrollbar if content size is larger than body */ \
int maxscroll = cs.y - b.h; \
\
if (maxscroll > 0 && b.h > 0) { \
mu_Rect base, thumb; \
mu_Id id = mu_get_id(ctx, "!scrollbar" #y, 11); \
\
/* get sizing / positioning */ \
base = b; \
base.x = b.x + b.w; \
base.w = ctx->style->scrollbar_size; \
\
/* handle input */ \
mu_update_control(ctx, id, base, 0); \
if (ctx->focus == id && ctx->mouse_down == MU_MOUSE_LEFT) { \
cnt->scroll.y += ctx->mouse_delta.y * cs.y / base.h; \
} \
/* clamp scroll to limits */ \
cnt->scroll.y = mu_clamp(cnt->scroll.y, 0, maxscroll); \
\
/* draw base and thumb */ \
ctx->draw_frame(ctx, base, MU_COLOR_SCROLLBASE); \
thumb = base; \
thumb.h = mu_max(16, base.h * b.h / cs.y); \
thumb.y += cnt->scroll.y * (base.h - thumb.h) / maxscroll; \
ctx->draw_frame(ctx, thumb, MU_COLOR_SCROLLTHUMB); \
\
/* set this as the scroll_target (will get scrolled on mousewheel) */ \
/* if the mouse is over it */ \
if (mu_mouse_over(ctx, b)) { ctx->scroll_target = cnt; } \
} else { \
cnt->scroll.y = 0; \
} \
} while (0)
static void scrollbars(mu_Context *ctx, mu_Container *cnt) {
int sz = ctx->style->scrollbar_size;
mu_Vec2 cs = cnt->content_size;
cs.x += ctx->style->padding * 2;
cs.y += ctx->style->padding * 2;
mu_push_clip_rect(ctx, cnt->body);
/* resize body to make room for scrollbars */
if (cs.y > cnt->last_body.h) { cnt->body.w -= sz; }
if (cs.x > cnt->last_body.w) { cnt->body.h -= sz; }
/* to create a horizontal or vertical scrollbar almost-identical code is
** used; only the references to `x|y` `w|h` need to be switched */
scrollbar(ctx, cnt, cnt->body, cs, x, y, w, h);
scrollbar(ctx, cnt, cnt->body, cs, y, x, h, w);
mu_pop_clip_rect(ctx);
}
static void push_container_body(mu_Context *ctx, mu_Container *cnt, int opt) {
if (~opt & MU_OPT_NOSCROLL) { scrollbars(ctx, cnt); }
mu_push_clip_rect(ctx, cnt->body);
push_layout(ctx, expand_rect(cnt->body, -ctx->style->padding), cnt->scroll);
}
static void begin_root_container(mu_Context *ctx, mu_Container *cnt) {
push_container(ctx, cnt);
/* push container to roots list and push head command */
push(ctx->root_list, cnt);
cnt->head = push_jump(ctx, NULL);
/* set as hover root if the mouse is overlapping this container and it has a
** higher zindex than the current hover root */
if (rect_overlaps_vec2(cnt->rect, ctx->mouse_pos) &&
(!ctx->hover_root || cnt->zindex > ctx->hover_root->zindex))
{
ctx->hover_root = cnt;
}
/* clipping is set directly here in case a root-container is made within
** another root-containers's begin/end block; this prevents the inner
** root-container being clipped to the outer */
push(ctx->clip_stack, unclipped_rect);
}
static void end_root_container(mu_Context *ctx) {
/* push tail 'goto' jump command and set head 'skip' command. the final steps
** on initing these are done in mu_end() */
mu_Container *cnt = mu_get_container(ctx);
cnt->tail = push_jump(ctx, NULL);
cnt->head->jump.dst = ctx->command_list.items + ctx->command_list.idx;
/* pop base clip rect and container */
mu_pop_clip_rect(ctx);
pop_container(ctx);
}
int mu_begin_window_ex(mu_Context *ctx, mu_Container *cnt, const char *title,
int opt)
{
mu_Rect rect, titlerect;
if (!cnt->inited) { mu_init_window(ctx, cnt, opt); }
if (!cnt->open) { return 0; }
begin_root_container(ctx, cnt);
/* draw frame */
if (~opt & MU_OPT_NOFRAME) {
ctx->draw_frame(ctx, cnt->rect, MU_COLOR_WINDOWBG);
}
/* do title bar */
rect = cnt->rect;
titlerect = rect;
titlerect.h = ctx->style->title_height;
if (~opt & MU_OPT_NOTITLE) {
ctx->draw_frame(ctx, titlerect, MU_COLOR_TITLEBG);
/* do title text */
if (~opt & MU_OPT_NOTITLE) {
mu_Id id = mu_get_id(ctx, "!title", 6);
mu_update_control(ctx, id, titlerect, opt);
mu_draw_control_text(ctx, title, titlerect, MU_COLOR_TITLETEXT, 0);
if (id == ctx->focus && ctx->mouse_down == MU_MOUSE_LEFT) {
cnt->rect.x += ctx->mouse_delta.x;
cnt->rect.y += ctx->mouse_delta.y;
}
cnt->body.y += titlerect.h;
cnt->body.h -= titlerect.h;
}
/* do `close` button */
if (~opt & MU_OPT_NOCLOSE) {
mu_Id id = mu_get_id(ctx, "!close", 6);
mu_Rect r = mu_rect(
titlerect.x + titlerect.w - titlerect.h,
titlerect.y, titlerect.h, titlerect.h);
titlerect.w -= r.w;
mu_draw_icon(ctx, MU_ICON_CLOSE, r, ctx->style->colors[MU_COLOR_TITLETEXT]);
mu_update_control(ctx, id, r, opt);
if (ctx->mouse_pressed == MU_MOUSE_LEFT && id == ctx->focus) {
cnt->open = 0;
}
}
}
/* do `resize` notch */
if (~opt & MU_OPT_NORESIZE) {
int sz = ctx->style->footer_height;
mu_Id id = mu_get_id(ctx, "!resize", 7);
mu_Rect r = mu_rect(rect.x + rect.w - sz, rect.y + rect.h - sz, sz, sz);
mu_update_control(ctx, id, r, opt);
mu_draw_icon(ctx, MU_ICON_RESIZE, r, ctx->style->colors[MU_COLOR_TEXT]);
if (id == ctx->focus && ctx->mouse_down == MU_MOUSE_LEFT) {
cnt->rect.w += ctx->mouse_delta.x;
cnt->rect.h += ctx->mouse_delta.y;
cnt->rect.w = mu_max(96, cnt->rect.w);
cnt->rect.h = mu_max(64, cnt->rect.h);
}
cnt->body.h -= sz;
}
/* do scrollbars and init clipping */
push_container_body(ctx, cnt, opt);
/* resize to content size */
if (opt & MU_OPT_AUTOSIZE) {
mu_Rect r = get_layout(ctx)->body;
cnt->rect.w = cnt->content_size.x + (cnt->rect.w - r.w);
cnt->rect.h = cnt->content_size.y + (cnt->rect.h - r.h);
}
/* close if this is a popup window and elsewhere was clicked */
if ((opt & MU_OPT_POPUP) && ctx->mouse_pressed &&
ctx->last_hover_root != cnt)
{
cnt->open = 0;
}
return MU_RES_ACTIVE;
}
int mu_begin_window(mu_Context *ctx, mu_Container *cnt, const char *title) {
return mu_begin_window_ex(ctx, cnt, title, 0);
}
void mu_end_window(mu_Context *ctx) {
mu_pop_clip_rect(ctx);
end_root_container(ctx);
}
void mu_open_popup(mu_Context *ctx, mu_Container *cnt) {
/* set as hover root so popup isn't closed in begin_window_ex() */
ctx->last_hover_root = ctx->hover_root = cnt;
/* init container if not inited */
if (!cnt->inited) { mu_init_window(ctx, cnt, 0); }
/* position at mouse cursor, open and bring-to-front */
cnt->rect = mu_rect(ctx->mouse_pos.x, ctx->mouse_pos.y, 0, 0);
cnt->open = 1;
mu_bring_to_front(ctx, cnt);
}
int mu_begin_popup(mu_Context *ctx, mu_Container *cnt) {
int opt = MU_OPT_POPUP | MU_OPT_AUTOSIZE | MU_OPT_NORESIZE |
MU_OPT_NOSCROLL | MU_OPT_NOTITLE | MU_OPT_CLOSED;
return mu_begin_window_ex(ctx, cnt, "", opt);
}
void mu_end_popup(mu_Context *ctx) {
mu_end_window(ctx);
}
void mu_begin_panel_ex(mu_Context *ctx, mu_Container *cnt, int opt) {
cnt->rect = mu_layout_next(ctx);
if (~opt & MU_OPT_NOFRAME) {
ctx->draw_frame(ctx, cnt->rect, MU_COLOR_PANELBG);
}
push_container(ctx, cnt);
push_container_body(ctx, cnt, opt);
}
void mu_begin_panel(mu_Context *ctx, mu_Container *cnt) {
mu_begin_panel_ex(ctx, cnt, 0);
}
void mu_end_panel(mu_Context *ctx) {
mu_pop_clip_rect(ctx);
pop_container(ctx);
}