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luabgfximgui.cpp
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#define LUA_LIB
extern "C" {
#include <lua.h>
#include <lauxlib.h>
}
#include "imgui/imgui.h"
#include <cstring>
#include <cstdlib>
#define INDEX_ID 1
#define INDEX_ARGS 2
#define NO_CLOSED ((lua_Integer)1 << 32)
struct lua_args {
lua_State *L;
bool err;
};
static int
lcreate(lua_State *L) {
float fontSize = luaL_checknumber(L, 1);
imguiCreate(fontSize);
ImGuiIO& io = ImGui::GetIO();
io.IniFilename = NULL;
return 0;
}
static int
ldestroy(lua_State *L) {
imguiDestroy();
return 0;
}
static int
lbeginFrame(lua_State *L) {
int32_t mx = luaL_checkinteger(L, 1);
int32_t my = luaL_checkinteger(L, 2);
int button1 = lua_toboolean(L, 3);
int button2 = lua_toboolean(L, 4);
int button3 = lua_toboolean(L, 5);
int32_t scroll = luaL_checkinteger(L, 6);
uint16_t width = luaL_checkinteger(L, 7);
uint16_t height = luaL_checkinteger(L, 8);
bgfx::ViewId view = luaL_checkinteger(L, 9);
uint8_t button =
(button1 ? IMGUI_MBUT_LEFT : 0) |
(button2 ? IMGUI_MBUT_RIGHT : 0) |
(button3 ? IMGUI_MBUT_MIDDLE : 0);
imguiBeginFrame(mx, my, button, scroll, width, height, -1, view);
return 0;
}
static int
lendFrame(lua_State *L) {
imguiEndFrame();
return 0;
}
static ImGuiCond
get_cond(lua_State *L, int index) {
int t = lua_type(L, index);
switch (t) {
case LUA_TSTRING: {
const char *cond = lua_tostring(L, index);
switch(cond[0]) {
case 'a':
case 'A':
return ImGuiCond_Appearing;
case 'o':
case 'O':
return ImGuiCond_Once;
case 'f':
case 'F':
return ImGuiCond_FirstUseEver;
default:
luaL_error(L, "Invalid ImGuiCond %s", cond);
break;
}
}
case LUA_TNIL:
case LUA_TNONE:
return 0;
default:
luaL_error(L, "Invalid ImGuiCond type %s", lua_typename(L, t));
}
return 0;
}
// Widgets bindings
static int
wButton(lua_State *L) {
const char * text = luaL_checkstring(L, INDEX_ID);
int w = luaL_optnumber(L, 2, 0);
int h = luaL_optnumber(L, 3, 0);
bool click = ImGui::Button(text, ImVec2(w,h));
lua_pushboolean(L, click);
return 1;
}
static int
wSmallButton(lua_State *L) {
const char * text = luaL_checkstring(L, INDEX_ID);
bool click = ImGui::SmallButton(text);
lua_pushboolean(L, click);
return 1;
}
static int
wInvisibleButton(lua_State *L) {
const char * text = luaL_checkstring(L, INDEX_ID);
int w = luaL_optnumber(L, 2, 0);
int h = luaL_optnumber(L, 3, 0);
bool click = ImGui::InvisibleButton(text, ImVec2(w,h));
lua_pushboolean(L, click);
return 1;
}
static int
wArrowButton(lua_State *L) {
const char * text = luaL_checkstring(L, INDEX_ID);
const char * dir = luaL_checkstring(L, 2);
ImGuiDir d;
switch (dir[0]) {
case 'l':case 'L':
d = ImGuiDir_Left;
break;
case 'r':case 'R':
d = ImGuiDir_Right;
break;
case 'u':case 'U':
d = ImGuiDir_Up;
break;
case 'd':case 'D':
d = ImGuiDir_Down;
break;
default:
d = ImGuiDir_None;
break;
}
bool click = ImGui::ArrowButton(text, d);
lua_pushboolean(L, click);
return 1;
}
static int
wColorButton(lua_State *L) {
const char * desc = luaL_checkstring(L, INDEX_ID);
float c1 = luaL_checknumber(L, 2);
float c2 = luaL_checknumber(L, 3);
float c3 = luaL_checknumber(L, 4);
float c4 = luaL_optnumber(L, 5, 1.0f);
ImGuiColorEditFlags flags = luaL_optinteger(L, 6, 0);
float w = luaL_optnumber(L, 7, 0);
float h = luaL_optnumber(L, 8, 0);
bool click = ImGui::ColorButton(desc, ImVec4(c1,c2,c3,c4), flags, ImVec2(w,h));
lua_pushboolean(L, click);
return 1;
}
// Todo: Image , ImageButton, CheckboxFlags, Combo
static int
wCheckbox(lua_State *L) {
const char * text = luaL_checkstring(L, INDEX_ID);
if (lua_type(L, INDEX_ARGS) == LUA_TTABLE) {
lua_geti(L, INDEX_ARGS, 1);
bool v = lua_toboolean(L, -1);
lua_pop(L, 1);
bool change = ImGui::Checkbox(text, &v);
lua_pushboolean(L, v);
lua_seti(L, INDEX_ARGS, 1);
lua_pushboolean(L, change);
return 1;
} else {
bool v = lua_toboolean(L, 2);
bool change = ImGui::Checkbox(text, &v);
lua_pushboolean(L, change);
lua_pushboolean(L, v);
return 2;
}
}
static int
wRadioButton(lua_State *L) {
const char * text = luaL_checkstring(L, INDEX_ID);
bool v = lua_toboolean(L, 2);
v = ImGui::RadioButton(text, v);
lua_pushboolean(L, v);
return 1;
}
static int
wProgressBar(lua_State *L) {
float fraction = luaL_checknumber(L, 1);
float w = -1;
float h = 0;
const char *overlay = NULL;
if (lua_isstring(L, 2)) {
overlay = lua_tostring(L, 2);
} else {
w = luaL_optnumber(L, 2, -1);
h = luaL_optnumber(L, 3, 0);
if (lua_isstring(L, 4)) {
overlay = lua_tostring(L, 4);
}
}
ImGui::ProgressBar(fraction, ImVec2(w,h), overlay);
return 0;
}
static int
wBullet(lua_State *L) {
ImGui::Bullet();
return 0;
}
static double
read_field_float(lua_State *L, const char * field, double v) {
if (lua_getfield(L, INDEX_ARGS, field) == LUA_TNUMBER) {
v = lua_tonumber(L, -1);
}
lua_pop(L, 1);
return v;
}
static float
read_field_checkfloat(lua_State *L, const char * field) {
float v;
if (lua_getfield(L, INDEX_ARGS, field) == LUA_TNUMBER) {
v = lua_tonumber(L, -1);
} else {
v = 0;
luaL_error(L, "no float %s", field);
}
lua_pop(L, 1);
return v;
}
static int
read_field_int(lua_State *L, const char * field, int v) {
if (lua_getfield(L, INDEX_ARGS, field) == LUA_TNUMBER) {
if (!lua_isinteger(L, -1)) {
luaL_error(L, "Not an integer");
}
v = lua_tointeger(L, -1);
}
lua_pop(L, 1);
return v;
}
static int
read_field_checkint(lua_State *L, const char * field) {
int v;
if (lua_getfield(L, INDEX_ARGS, field) == LUA_TNUMBER) {
if (!lua_isinteger(L, -1)) {
luaL_error(L, "Not an integer");
}
v = lua_tointeger(L, -1);
} else {
v = 0;
luaL_error(L, "no int %s", field);
}
lua_pop(L, 1);
return v;
}
static const char *
read_field_string(lua_State *L, const char * field, const char *v) {
if (lua_getfield(L, INDEX_ARGS, field) == LUA_TSTRING) {
v = lua_tostring(L, -1);
}
lua_pop(L, 1);
return v;
}
static const char *
read_index_string(lua_State *L, int index, const char *v) {
if (lua_geti(L, INDEX_ARGS, index) == LUA_TSTRING) {
v = lua_tostring(L, -1);
}
lua_pop(L, 1);
return v;
}
static bool
read_field_boolean(lua_State *L, const char *field, bool v) {
if (lua_getfield(L, INDEX_ARGS, field) == LUA_TBOOLEAN) {
v = (bool)lua_toboolean(L, 1);
}
lua_pop(L, 1);
return v;
}
static bool
drag_float(lua_State *L, const char *label, int n) {
float v[4];
int i;
for (i=0;i<n;i++) {
if (lua_geti(L, INDEX_ARGS, i+1) != LUA_TNUMBER) {
luaL_error(L, "Need float [%d]", i+1);
}
v[i] = lua_tonumber(L, -1);
lua_pop(L, 1);
}
float speed = read_field_float(L, "speed", 1.0f);
float min = read_field_float(L, "min", 0.0f);
float max = read_field_float(L, "max", 0.0f);
const char * format = read_field_string(L, "format", "%.3f");
float power = read_field_float(L, "power", 1.0f);
bool change = false;
switch(n) {
case 1:
change = ImGui::DragFloat(label, v, speed, min, max, format, power);
break;
case 2:
if (read_field_boolean(L, "range", false)) {
const char *format_max = read_field_string(L, "format_max", NULL);
change = ImGui::DragFloatRange2(label, v+0, v+1, speed, min, max, format, format_max, power);
} else {
change = ImGui::DragFloat2(label, v, speed, min, max, format, power);
}
break;
case 3:
change = ImGui::DragFloat3(label, v, speed, min, max, format, power);
break;
case 4:
change = ImGui::DragFloat4(label, v, speed, min, max, format, power);
break;
}
if (change) {
for (i=0;i<n;i++) {
lua_pushnumber(L, v[i]);
lua_seti(L, INDEX_ARGS, i+1);
}
}
return change;
}
static bool
drag_int(lua_State *L, const char *label, int n) {
int v[4];
int i;
for (i=0;i<n;i++) {
if (lua_geti(L, INDEX_ARGS, i+1) != LUA_TNUMBER || !lua_isinteger(L, -1)) {
luaL_error(L, "Need integer [%d]", i+1);
}
v[i] = lua_tointeger(L, -1);
lua_pop(L, 1);
}
float speed = read_field_float(L, "speed", 1.0f);
int min = read_field_int(L, "min", 0);
int max = read_field_int(L, "max", 0);
const char * format = read_field_string(L, "format", "%d");
bool change = false;
switch(n) {
case 1:
change = ImGui::DragInt(label, v, speed, min, max, format);
break;
case 2:
if (read_field_boolean(L, "range", false)) {
const char *format_max = read_field_string(L, "format_max", NULL);
change = ImGui::DragIntRange2(label, v+0, v+1, speed, min, max, format, format_max);
} else {
change = ImGui::DragInt2(label, v, speed, min, max, format);
}
break;
case 3:
change = ImGui::DragInt3(label, v, speed, min, max, format);
break;
case 4:
change = ImGui::DragInt4(label, v, speed, min, max, format);
break;
}
if (change) {
for (i=0;i<n;i++) {
lua_pushinteger(L, v[i]);
lua_seti(L, INDEX_ARGS, i+1);
}
}
return change;
}
static bool
slider_float(lua_State *L, const char *label, int n) {
float v[4];
int i;
for (i=0;i<n;i++) {
if (lua_geti(L, INDEX_ARGS, i+1) != LUA_TNUMBER) {
luaL_error(L, "Need float [%d]", i+1);
}
v[i] = lua_tonumber(L, -1);
lua_pop(L, 1);
}
float min = read_field_checkfloat(L, "min");
float max = read_field_checkfloat(L, "max");
const char * format = read_field_string(L, "format", "%.3f");
bool change = false;
switch(n) {
case 1:
change = ImGui::SliderFloat(label, v, min, max, format);
break;
case 2:
change = ImGui::SliderFloat2(label, v, min, max, format);
break;
case 3:
change = ImGui::SliderFloat3(label, v, min, max, format);
break;
case 4:
change = ImGui::SliderFloat4(label, v, min, max, format);
break;
}
if (change) {
for (i=0;i<n;i++) {
lua_pushnumber(L, v[i]);
lua_seti(L, INDEX_ARGS, i+1);
}
}
return change;
}
static bool
slider_int(lua_State *L, const char *label, int n) {
int v[4];
int i;
for (i=0;i<n;i++) {
if (lua_geti(L, INDEX_ARGS, i+1) != LUA_TNUMBER || !lua_isinteger(L, -1)) {
luaL_error(L, "Need integer [%d]", i+1);
}
v[i] = lua_tointeger(L, -1);
lua_pop(L, 1);
}
int min = read_field_checkint(L, "min");
int max = read_field_checkint(L, "max");
const char * format = read_field_string(L, "format", "%d");
bool change = false;
switch(n) {
case 1:
change = ImGui::SliderInt(label, v, min, max, format);
break;
case 2:
change = ImGui::SliderInt2(label, v, min, max, format);
break;
case 3:
change = ImGui::SliderInt3(label, v, min, max, format);
break;
case 4:
change = ImGui::SliderInt4(label, v, min, max, format);
break;
}
if (change) {
for (i=0;i<n;i++) {
lua_pushinteger(L, v[i]);
lua_seti(L, INDEX_ARGS, i+1);
}
}
return change;
}
static bool
slider_angle(lua_State *L, const char *label) {
float r;
if (lua_geti(L, INDEX_ARGS, 1) != LUA_TNUMBER) {
luaL_error(L, "Need float deg");
}
r = lua_tonumber(L, -1);
lua_pop(L, 1);
float min = read_field_float(L, "min", -360.0f);
float max = read_field_float(L, "max", +360.0f);
const char * format = read_field_string(L, "format", "%.0f deg");
float change = ImGui::SliderAngle(label, &r, min, max, format);
if (change) {
lua_pushnumber(L, r);
lua_seti(L, INDEX_ARGS, 1);
}
return change;
}
static bool
vslider_float(lua_State *L, const char *label) {
float r;
if (lua_geti(L, INDEX_ARGS, 1) != LUA_TNUMBER) {
luaL_error(L, "Need float");
}
r = lua_tonumber(L, -1);
lua_pop(L, 1);
float width = read_field_checkfloat(L, "width");
float height = read_field_checkfloat(L, "height");
float min = read_field_checkfloat(L, "min");
float max = read_field_checkfloat(L, "max");
const char * format = read_field_string(L, "format", "%.3f");
float power = read_field_float(L, "power", 1.0f);
float change = ImGui::VSliderFloat(label, ImVec2(width, height), &r, min, max, format, power);
if (change) {
lua_pushnumber(L, r);
lua_seti(L, INDEX_ARGS, 1);
}
return change;
}
static bool
vslider_int(lua_State *L, const char *label) {
int r;
if (lua_geti(L, INDEX_ARGS, 1) != LUA_TNUMBER) {
luaL_error(L, "Need float");
}
r = lua_tointeger(L, -1);
lua_pop(L, 1);
float width = read_field_checkfloat(L, "width");
float height = read_field_checkfloat(L, "height");
int min = read_field_checkint(L, "min");
int max = read_field_checkint(L, "max");
const char * format = read_field_string(L, "format", "%d");
float change = ImGui::VSliderInt(label, ImVec2(width, height), &r, min, max, format);
if (change) {
lua_pushinteger(L, r);
lua_seti(L, INDEX_ARGS, 1);
}
return change;
}
#define DRAG_FLOAT 0
#define DRAG_INT 1
#define SLIDER_FLOAT 2
#define SLIDER_INT 3
#define SLIDER_ANGLE 4
#define VSLIDER_FLOAT 5
#define VSLIDER_INT 6
#define COLOR_EDIT 0
#define COLOR_PICKER 1
static int
wDrag(lua_State *L, int type) {
const char * label = luaL_checkstring(L, INDEX_ID);
luaL_checktype(L, INDEX_ARGS, LUA_TTABLE);
lua_len(L, INDEX_ARGS);
int n = lua_tointeger(L, -1);
lua_pop(L, 1);
if (n < 1 || n > 4)
return luaL_error(L, "Need 1-4 numbers");
bool change = false;
// todo: DragScalar/DragScalarN/SliderScalar/SliderScalarN/VSliderScalar
switch(type) {
case DRAG_FLOAT:
change = drag_float(L, label, n);
break;
case DRAG_INT:
change = drag_int(L, label, n);
break;
case SLIDER_FLOAT:
change = slider_float(L, label, n);
break;
case SLIDER_INT:
change = slider_int(L, label, n);
break;
case SLIDER_ANGLE:
change = slider_angle(L, label);
break;
case VSLIDER_FLOAT:
change = vslider_float(L, label);
break;
case VSLIDER_INT:
change = vslider_int(L, label);
break;
}
lua_pushboolean(L, change);
return 1;
}
static int
wDragFloat(lua_State *L) {
return wDrag(L, DRAG_FLOAT);
}
static int
wDragInt(lua_State *L) {
return wDrag(L, DRAG_INT);
}
static int
wSliderFloat(lua_State *L) {
return wDrag(L, SLIDER_FLOAT);
}
static int
wSliderInt(lua_State *L) {
return wDrag(L, SLIDER_INT);
}
static int
wSliderAngle(lua_State *L) {
return wDrag(L, SLIDER_ANGLE);
}
static int
wVSliderFloat(lua_State *L) {
return wDrag(L, VSLIDER_FLOAT);
}
static int
wVSliderInt(lua_State *L) {
return wDrag(L, VSLIDER_INT);
}
static int
wColor(lua_State *L, int type) {
const char *label = luaL_checkstring(L, INDEX_ID);
luaL_checktype(L, INDEX_ARGS, LUA_TTABLE);
lua_len(L, INDEX_ARGS);
int n = lua_tointeger(L, -1);
lua_pop(L, 1);
if (n < 3 || n > 4)
return luaL_error(L, "Need 3-4 numbers");
ImGuiColorEditFlags flags = read_field_int(L, "flags", 0);
float v[4];
int i;
for (i=0;i<n;i++) {
if (lua_geti(L, INDEX_ARGS, i+1) != LUA_TNUMBER) {
luaL_error(L, "Color should be a number");
}
v[i] = lua_tonumber(L, -1);
lua_pop(L, 1);
}
bool change;
if (type == COLOR_EDIT) {
if (n == 3) {
change = ImGui::ColorEdit3(label, v, flags);
} else {
change = ImGui::ColorEdit4(label, v, flags);
}
} else {
if (n == 3) {
change = ImGui::ColorPicker3(label, v, flags);
} else {
const char * ref = NULL;
if (lua_getfield(L, INDEX_ARGS, "ref") == LUA_TSTRING) {
size_t sz;
ref = lua_tolstring(L, -1, &sz);
if (sz != 4 * sizeof(float)) {
luaL_error(L, "Color ref should be 4 float string");
}
}
lua_pop(L, 1);
change = ImGui::ColorPicker4(label, v, flags, (const float *)ref);
}
}
if (change) {
for (i=0;i<n;i++) {
lua_pushnumber(L, v[i]);
lua_seti(L, INDEX_ARGS, i+1);
}
}
lua_pushboolean(L, change);
return 1;
}
static int
wColorEdit(lua_State *L) {
return wColor(L, COLOR_EDIT);
}
static int
wColorPicker(lua_State *L) {
return wColor(L, COLOR_PICKER);
}
struct editbuf {
char * buf;
size_t size;
lua_State *L;
};
static int
editbuf_tostring(lua_State *L) {
struct editbuf * ebuf = (struct editbuf *)lua_touserdata(L, 1);
lua_pushstring(L, ebuf->buf);
return 1;
}
static int
editbuf_release(lua_State *L) {
struct editbuf * ebuf = (struct editbuf *)lua_touserdata(L, 1);
free(ebuf->buf);
ebuf->buf = NULL;
ebuf->size = 0;
return 0;
}
static void
create_new_editbuf(lua_State *L) {
size_t sz;
const char * text = lua_tolstring(L, -1, &sz);
if (text == NULL) {
sz = 64; // default buf size 64
} else {
++sz;
}
struct editbuf *ebuf = (struct editbuf *)lua_newuserdatauv(L, sizeof(*ebuf), 0);
ebuf->buf = (char *)malloc(sz);
if (ebuf->buf == NULL)
luaL_error(L, "Edit buffer oom %u", (unsigned)sz);
ebuf->size = sz;
if (text) {
memcpy(ebuf->buf, text, sz);
} else {
ebuf->buf[0] = 0;
}
if (luaL_newmetatable(L, "IMGUI_EDITBUF")) {
lua_pushcfunction(L, editbuf_tostring);
lua_setfield(L, -2, "__tostring");
lua_pushcfunction(L, editbuf_release);
lua_setfield(L, -2, "__gc");
}
lua_setmetatable(L, -2);
lua_replace(L, -2);
}
static int
edit_callback(ImGuiInputTextCallbackData *data) {
struct editbuf * ebuf = (struct editbuf *)data->UserData;
lua_State *L = ebuf->L;
switch (data->EventFlag) {
case ImGuiInputTextFlags_CallbackResize: {
size_t newsize = ebuf->size;
while (newsize < (size_t)data->BufTextLen) {
newsize *= 2;
}
data->Buf = (char *)realloc(ebuf->buf, newsize);
if (data->Buf == NULL) {
data->Buf = ebuf->buf;
data->BufTextLen = 0;
} else {
ebuf->buf = data->Buf;
ebuf->size = newsize;
}
break;
}
case ImGuiInputTextFlags_CallbackCharFilter: {
if (!lua_checkstack(L, 3)) {
break;
}
if (lua_getfield(L, INDEX_ARGS, "filter") == LUA_TFUNCTION) {
int c = data->EventChar;
lua_pushvalue(L, 1);
lua_pushinteger(L, c);
if (lua_pcall(L, 2, 1, 0) != LUA_OK) {
break;
}
if (lua_type(L, -1) == LUA_TNUMBER && lua_isinteger(L, -1)) {
data->EventChar = (ImWchar)lua_tointeger(L, -1);
lua_pop(L, 1);
} else {
// discard char
lua_pop(L, 1);
return 1;
}
} else {
lua_pop(L, 1);
}
break;
}
case ImGuiInputTextFlags_CallbackHistory: {
if (!lua_checkstack(L, 3)) {
break;
}
const char * what = data->EventKey == ImGuiKey_UpArrow ? "up" : "down";
if (lua_getfield(L, INDEX_ARGS, what) == LUA_TFUNCTION) {
lua_pushvalue(L, 1);
if (lua_pcall(L, 1, 1, 0) != LUA_OK) {
break;
}
if (lua_type(L, -1) == LUA_TSTRING) {
size_t sz;
const char *str = lua_tolstring(L, -1, &sz);
data->DeleteChars(0, data->BufTextLen);
data->InsertChars(0, str, str+sz);
}
lua_pop(L, 1);
} else {
lua_pop(L, 1);
}
break;
}
case ImGuiInputTextFlags_CallbackCompletion: {
if (!lua_checkstack(L, 3)) {
break;
}
if (lua_getfield(L, INDEX_ARGS, "tab") == LUA_TFUNCTION) {
lua_pushvalue(L, 1);
lua_pushinteger(L, data->CursorPos);
if (lua_pcall(L, 2, 1, 0) != LUA_OK) {
break;
}
if (lua_type(L, -1) == LUA_TSTRING) {
size_t sz;
const char *str = lua_tolstring(L, -1, &sz);
data->DeleteChars(0, data->CursorPos);
data->InsertChars(0, str, str+sz);
data->CursorPos = sz;
}
lua_pop(L, 1);
} else {
lua_pop(L, 1);
}
break;
}
}
return 0;
}
static int
wInputText_(lua_State *L, int multiline) {
const char * label = luaL_checkstring(L, INDEX_ID);
luaL_checktype(L, INDEX_ARGS, LUA_TTABLE);
ImGuiInputTextFlags flags = read_field_int(L, "flags", 0);
const char * hint = read_field_string(L, "hint", NULL);
int t = lua_getfield(L, INDEX_ARGS, "text");
if (t == LUA_TSTRING || t == LUA_TNIL) {
create_new_editbuf(L);
lua_pushvalue(L, -1);
lua_setfield(L, INDEX_ARGS, "text");
}
struct editbuf * ebuf = (struct editbuf *)luaL_checkudata(L, -1, "IMGUI_EDITBUF");
ebuf->L = L;
bool change;
flags |= ImGuiInputTextFlags_CallbackResize;
int top = lua_gettop(L);
if (multiline) {
float width = read_field_float(L, "width", 0);
float height = read_field_float(L, "height", 0);
change = ImGui::InputTextMultiline(label, ebuf->buf, ebuf->size, ImVec2(width, height), flags, edit_callback, ebuf);
} else {
if (hint) {
change = ImGui::InputTextWithHint(label, hint, ebuf->buf, ebuf->size, flags, edit_callback, ebuf);
} else {
change = ImGui::InputText(label, ebuf->buf, ebuf->size, flags, edit_callback, ebuf);
}
}
if (lua_gettop(L) != top) {
lua_error(L);
}
lua_pushboolean(L, change);
return 1;
}
static int
wInputText(lua_State *L) {
return wInputText_(L, 0);
}
static int
wInputTextMultiline(lua_State *L) {
return wInputText_(L, 1);
}
static bool
input_float(lua_State *L, const char *label, const char *format, ImGuiInputTextFlags flags, int n) {
if (n == 1) {
double step = read_field_float(L, "step", 0);
double step_fast = read_field_float(L, "step_fast", 0);
lua_geti(L, INDEX_ARGS, 1);
double v = lua_tonumber(L, -1);
lua_pop(L, 1);
bool r = ImGui::InputDouble(label, &v, step, step_fast, format, flags);
if (r) {
lua_pushnumber(L, v);
lua_seti(L, INDEX_ARGS, 1);
}
return r;
} else {
float v[4];
int i;
for (i=0;i<n;i++) {
lua_geti(L, INDEX_ARGS, i+1);
v[i] = lua_tonumber(L, -1);
lua_pop(L, 1);
}
bool r = false;
switch (n) {
case 2:
r = ImGui::InputFloat2(label, v, format, flags);
break;
case 3:
r = ImGui::InputFloat3(label, v, format, flags);
break;
case 4:
r = ImGui::InputFloat4(label, v, format, flags);
break;
}
if (r) {
for (i=0;i<n;i++) {
lua_pushnumber(L, v[i]);
lua_seti(L, INDEX_ARGS, i+1);
}
}
return r;
}
}
static bool
input_int(lua_State *L, const char *label, ImGuiInputTextFlags flags, int n) {
int step = 1;
int step_fast = 100;
if (n > 1) {
step = read_field_int(L, "step", 1);
step_fast = read_field_int(L, "step_fast", 100);
}
int v[4];
int i;
for (i=0;i<n;i++) {
lua_geti(L, INDEX_ARGS, i+1);
v[i] = lua_tointeger(L, -1);
lua_pop(L, 1);
}
bool r = false;
switch (n) {
case 1:
r = ImGui::InputInt(label, v, step, step_fast, flags);
break;
case 2:
r = ImGui::InputInt2(label, v, flags);
break;
case 3:
r = ImGui::InputInt3(label, v, flags);
break;
case 4:
r = ImGui::InputInt4(label, v, flags);
break;
}
if (r) {
for (i=0;i<n;i++) {
lua_pushinteger(L, v[i]);
lua_seti(L, INDEX_ARGS, i+1);
}
}
return r;
}
static int
wInputFloat(lua_State *L) {
const char * label = luaL_checkstring(L, INDEX_ID);
luaL_checktype(L, INDEX_ARGS, LUA_TTABLE);
lua_len(L, INDEX_ARGS);
int n = lua_tointeger(L, -1);
lua_pop(L, 1);
if (n < 1 || n > 4)
return luaL_error(L, "Need 1-4 numbers");
ImGuiInputTextFlags flags = read_field_int(L, "flags", 0);
const char * format = read_field_string(L, "format", "%.3f");
bool change = input_float(L, label, format, flags, n);
lua_pushboolean(L, change);
return 1;
}
static int
wInputInt(lua_State *L) {
const char * label = luaL_checkstring(L, INDEX_ID);
luaL_checktype(L, INDEX_ARGS, LUA_TTABLE);
lua_len(L, INDEX_ARGS);
int n = lua_tointeger(L, -1);
lua_pop(L, 1);
if (n < 1 || n > 4)
return luaL_error(L, "Need 1-4 int");
ImGuiInputTextFlags flags = read_field_int(L, "flags", 0);
bool change = input_int(L, label, flags, n);
lua_pushboolean(L, change);
return 1;
}
static int
wText(lua_State *L) {
size_t sz;
const char * text = luaL_checklstring(L, 1, &sz);
float color[4];
switch (lua_gettop(L)) {
case 1: // no color
ImGui::TextUnformatted(text, text+sz);
break;
case 4: // RGB
case 5: // RGBA
color[0] = luaL_checknumber(L, 2);
color[1] = luaL_checknumber(L, 3);
color[2] = luaL_checknumber(L, 4);
color[3] = luaL_optnumber(L, 5, 1.0);
ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(color[0], color[1], color[2], color[3]));
ImGui::TextUnformatted(text, text+sz);
ImGui::PopStyleColor();
break;
default:
luaL_error(L, "Invalid args number for Text");
}
return 0;
}