imgui.cpp

//
// Copyright (c) 2009-2010 Mikko Mononen memon@inside.org
//
// This software is provided 'as-is', without any express or implied
// warranty.  In no event will the authors be held liable for any damages
// arising from the use of this software.
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would be
//    appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
//    misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source distribution.
//

// Source altered and distributed from https://github.com/AdrienHerubel/imgui

#include <stdio.h>
#include <string.h>
#define _USE_MATH_DEFINES
#include <math.h>
#include "imgui.h"

#ifdef _MSC_VER
#       define snprintf _snprintf
#endif

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

static const unsigned TEXT_POOL_SIZE = 8000;
static char g_textPool[TEXT_POOL_SIZE];
static unsigned g_textPoolSize = 0;
static const char* allocText(const char* text)
{
        unsigned len = strlen(text)+1;
        if (g_textPoolSize + len >= TEXT_POOL_SIZE)
                return 0;
        char* dst = &g_textPool[g_textPoolSize]; 
        memcpy(dst, text, len);
        g_textPoolSize += len;
        return dst;
}

static const unsigned GFXCMD_QUEUE_SIZE = 5000;
static imguiGfxCmd g_gfxCmdQueue[GFXCMD_QUEUE_SIZE];
static unsigned g_gfxCmdQueueSize = 0;

static void resetGfxCmdQueue()
{
        g_gfxCmdQueueSize = 0;
        g_textPoolSize = 0;
}

static void addGfxCmdScissor(int x, int y, int w, int h)
{
        if (g_gfxCmdQueueSize >= GFXCMD_QUEUE_SIZE)
                return;
        imguiGfxCmd& cmd = g_gfxCmdQueue[g_gfxCmdQueueSize++];
        cmd.type = IMGUI_GFXCMD_SCISSOR;
        cmd.flags = x < 0 ? 0 : 1;      // on/off flag.
        cmd.col = 0;
        cmd.rect.x = (short)x;
        cmd.rect.y = (short)y;
        cmd.rect.w = (short)w;
        cmd.rect.h = (short)h;
}

static void addGfxCmdRect(float x, float y, float w, float h, unsigned int color)
{
        if (g_gfxCmdQueueSize >= GFXCMD_QUEUE_SIZE)
                return;
        imguiGfxCmd& cmd = g_gfxCmdQueue[g_gfxCmdQueueSize++];
        cmd.type = IMGUI_GFXCMD_RECT;
        cmd.flags = 0;
        cmd.col = color;
        cmd.rect.x = (short)(x*8.0f);
        cmd.rect.y = (short)(y*8.0f);
        cmd.rect.w = (short)(w*8.0f);
        cmd.rect.h = (short)(h*8.0f);
        cmd.rect.r = 0;
}

static void addGfxCmdLine(float x0, float y0, float x1, float y1, float r, unsigned int color)
{
        if (g_gfxCmdQueueSize >= GFXCMD_QUEUE_SIZE)
                return;
        imguiGfxCmd& cmd = g_gfxCmdQueue[g_gfxCmdQueueSize++];
        cmd.type = IMGUI_GFXCMD_LINE;
        cmd.flags = 0;
        cmd.col = color;
        cmd.line.x0 = (short)(x0*8.0f);
        cmd.line.y0 = (short)(y0*8.0f);
        cmd.line.x1 = (short)(x1*8.0f);
        cmd.line.y1 = (short)(y1*8.0f);
        cmd.line.r = (short)(r*8.0f);
}

static void addGfxCmdRoundedRect(float x, float y, float w, float h, float r, unsigned int color)
{
        if (g_gfxCmdQueueSize >= GFXCMD_QUEUE_SIZE)
                return;
        imguiGfxCmd& cmd = g_gfxCmdQueue[g_gfxCmdQueueSize++];
        cmd.type = IMGUI_GFXCMD_RECT;
        cmd.flags = 0;
        cmd.col = color;
        cmd.rect.x = (short)(x*8.0f);
        cmd.rect.y = (short)(y*8.0f);
        cmd.rect.w = (short)(w*8.0f);
        cmd.rect.h = (short)(h*8.0f);
        cmd.rect.r = (short)(r*8.0f);
}

static void addGfxCmdTriangle(int x, int y, int w, int h, int flags, unsigned int color)
{
        if (g_gfxCmdQueueSize >= GFXCMD_QUEUE_SIZE)
                return;
        imguiGfxCmd& cmd = g_gfxCmdQueue[g_gfxCmdQueueSize++];
        cmd.type = IMGUI_GFXCMD_TRIANGLE;
        cmd.flags = (char)flags;
        cmd.col = color;
        cmd.rect.x = (short)(x*8.0f);
        cmd.rect.y = (short)(y*8.0f);
        cmd.rect.w = (short)(w*8.0f);
        cmd.rect.h = (short)(h*8.0f);
}

static void addGfxCmdText(int x, int y, int align, const char* text, unsigned int color)
{
        if (g_gfxCmdQueueSize >= GFXCMD_QUEUE_SIZE)
                return;
        imguiGfxCmd& cmd = g_gfxCmdQueue[g_gfxCmdQueueSize++];
        cmd.type = IMGUI_GFXCMD_TEXT;
        cmd.flags = 0;
        cmd.col = color;
        cmd.text.x = (short)x;
        cmd.text.y = (short)y;
        cmd.text.align = (short)align;
        cmd.text.text = allocText(text);
}

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
struct GuiState
{
        GuiState() :
                left(false), leftPressed(false), leftReleased(false),
                mx(-1), my(-1), scroll(0),
                active(0), hot(0), hotToBe(0), isHot(false), isActive(false), wentActive(false),
                dragX(0), dragY(0), dragOrig(0), widgetX(0), widgetY(0), widgetW(100),
                insideCurrentScroll(false),  areaId(0), widgetId(0)
        {
        }

        bool left;
        bool leftPressed, leftReleased;
        int mx,my;
        int scroll;
        unsigned int active;
        unsigned int hot;
        unsigned int hotToBe;
        bool isHot;
        bool isActive;
        bool wentActive;
        int dragX, dragY;
        float dragOrig;
        int widgetX, widgetY, widgetW;
        bool insideCurrentScroll;
        
        unsigned int areaId;
        unsigned int widgetId;
};

static GuiState g_state;

inline bool anyActive()
{
        return g_state.active != 0;
}

inline bool isActive(unsigned int id)
{
        return g_state.active == id;
}

inline bool isHot(unsigned int id)
{
        return g_state.hot == id;
}

inline bool inRect(int x, int y, int w, int h, bool checkScroll = true)
{
   return (!checkScroll || g_state.insideCurrentScroll) && g_state.mx >= x && g_state.mx <= x+w && g_state.my >= y && g_state.my <= y+h;
}

inline void clearInput()
{
        g_state.leftPressed = false;
        g_state.leftReleased = false;
        g_state.scroll = 0;
}

inline void clearActive()
{
        g_state.active = 0;
        // mark all UI for this frame as processed
        clearInput();
}

inline void setActive(unsigned int id)
{
        g_state.active = id;
        g_state.wentActive = true;
}

inline void setHot(unsigned int id)
{
   g_state.hotToBe = id;
}


static bool buttonLogic(unsigned int id, bool over)
{
        bool res = false;
        // process down
        if (!anyActive())
        {
                if (over)
                        setHot(id);
                if (isHot(id) && g_state.leftPressed)
                        setActive(id);
        }

        // if button is active, then react on left up
        if (isActive(id))
        {
                g_state.isActive = true;
                if (over)
                        setHot(id);
                if (g_state.leftReleased)
                {
                        if (isHot(id))
                                res = true;
                        clearActive();
                }
        }

        if (isHot(id))
                g_state.isHot = true;

        return res;
}

static void updateInput(int mx, int my, unsigned char mbut, int scroll)
{
        bool left = (mbut & IMGUI_MBUT_LEFT) != 0;

        g_state.mx = mx;
        g_state.my = my;
        g_state.leftPressed = !g_state.left && left;
        g_state.leftReleased = g_state.left && !left;
        g_state.left = left;

        g_state.scroll = scroll;
}

void imguiBeginFrame(int mx, int my, unsigned char mbut, int scroll)
{
        updateInput(mx,my,mbut,scroll);

        g_state.hot = g_state.hotToBe;
        g_state.hotToBe = 0;

        g_state.wentActive = false;
        g_state.isActive = false;
        g_state.isHot = false;

        g_state.widgetX = 0;
        g_state.widgetY = 0;
        g_state.widgetW = 0;

        g_state.areaId = 1;
        g_state.widgetId = 1;

        resetGfxCmdQueue();
}

void imguiEndFrame()
{
        clearInput();
}

const imguiGfxCmd* imguiGetRenderQueue()
{
        return g_gfxCmdQueue;
}

int imguiGetRenderQueueSize()
{
        return g_gfxCmdQueueSize;
}


//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
static const int BUTTON_HEIGHT = 20;
static const int SLIDER_HEIGHT = 20;
static const int SLIDER_MARKER_WIDTH = 10;
static const int CHECK_SIZE = 8;
static const int DEFAULT_SPACING = 4;
static const int TEXT_HEIGHT = 8;
static const int SCROLL_AREA_PADDING = 6;
static const int INDENT_SIZE = 16;
static const int AREA_HEADER = 28;

static int g_scrollTop = 0;
static int g_scrollBottom = 0;
static int g_scrollRight = 0;
static int g_scrollAreaTop = 0;
static int* g_scrollVal = 0;
static int g_focusTop = 0;
static int g_focusBottom = 0;
static unsigned int g_scrollId = 0;
static bool g_insideScrollArea = false;

bool imguiBeginScrollArea(const char* name, int x, int y, int w, int h, int* scroll)
{
        g_state.areaId++;
        g_state.widgetId = 0;
        g_scrollId = (g_state.areaId<<16) | g_state.widgetId;

        g_state.widgetX = x + SCROLL_AREA_PADDING;
        g_state.widgetY = y+h-AREA_HEADER + (*scroll);
        g_state.widgetW = w - SCROLL_AREA_PADDING*4;
        g_scrollTop = y-AREA_HEADER+h;
        g_scrollBottom = y+SCROLL_AREA_PADDING;
        g_scrollRight = x+w - SCROLL_AREA_PADDING*3;
        g_scrollVal = scroll;

        g_scrollAreaTop = g_state.widgetY;

        g_focusTop = y-AREA_HEADER;
        g_focusBottom = y-AREA_HEADER+h;

        g_insideScrollArea = inRect(x, y, w, h, false);
        g_state.insideCurrentScroll = g_insideScrollArea;

        addGfxCmdRoundedRect((float)x, (float)y, (float)w, (float)h, 6, imguiRGBA(0,0,0,192));

        addGfxCmdText(x+AREA_HEADER/2, y+h-AREA_HEADER/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, name, imguiRGBA(255,255,255,128));

        addGfxCmdScissor(x+SCROLL_AREA_PADDING, y+SCROLL_AREA_PADDING, w-SCROLL_AREA_PADDING*4, h-AREA_HEADER-SCROLL_AREA_PADDING);

        return g_insideScrollArea;
}

void imguiEndScrollArea()
{
        // Disable scissoring.
        addGfxCmdScissor(-1,-1,-1,-1);

        // Draw scroll bar
        int x = g_scrollRight+SCROLL_AREA_PADDING/2;
        int y = g_scrollBottom;
        int w = SCROLL_AREA_PADDING*2;
        int h = g_scrollTop - g_scrollBottom;

        int stop = g_scrollAreaTop;
        int sbot = g_state.widgetY;
        int sh = stop - sbot; // The scrollable area height.

        float barHeight = (float)h/(float)sh;
        
        if (barHeight < 1)
        {
                float barY = (float)(y - sbot)/(float)sh;
                if (barY < 0) barY = 0;
                if (barY > 1) barY = 1;
                
                // Handle scroll bar logic.
                unsigned int hid = g_scrollId;
                int hx = x;
                int hy = y + (int)(barY*h);
                int hw = w;
                int hh = (int)(barHeight*h);
                
                const int range = h - (hh-1);
                bool over = inRect(hx, hy, hw, hh);
                buttonLogic(hid, over);
                if (isActive(hid))
                {
                        float u = (float)(hy-y) / (float)range;
                        if (g_state.wentActive)
                        {
                                g_state.dragY = g_state.my;
                                g_state.dragOrig = u;
                        }
                        if (g_state.dragY != g_state.my)
                        {
                                u = g_state.dragOrig + (g_state.my - g_state.dragY) / (float)range;
                                if (u < 0) u = 0;
                                if (u > 1) u = 1;
                                *g_scrollVal = (int)((1-u) * (sh - h));
                        }
                }
                
                // BG
                addGfxCmdRoundedRect((float)x, (float)y, (float)w, (float)h, (float)w/2-1, imguiRGBA(0,0,0,196));
                // Bar
                if (isActive(hid))
                        addGfxCmdRoundedRect((float)hx, (float)hy, (float)hw, (float)hh, (float)w/2-1, imguiRGBA(255,196,0,196));
                else
                        addGfxCmdRoundedRect((float)hx, (float)hy, (float)hw, (float)hh, (float)w/2-1, isHot(hid) ? imguiRGBA(255,196,0,96) : imguiRGBA(255,255,255,64));

                // Handle mouse scrolling.
                if (g_insideScrollArea) // && !anyActive())
                {
                        if (g_state.scroll)
                        {
                                *g_scrollVal += 20*g_state.scroll;
                                if (*g_scrollVal < 0) *g_scrollVal = 0;
                                if (*g_scrollVal > (sh - h)) *g_scrollVal = (sh - h);
                        }
                }
        }
        g_state.insideCurrentScroll = false;
}

bool imguiButton(const char* text, bool enabled)
{
        g_state.widgetId++;
        unsigned int id = (g_state.areaId<<16) | g_state.widgetId;
        
        int x = g_state.widgetX;
        int y = g_state.widgetY - BUTTON_HEIGHT;
        int w = g_state.widgetW;
        int h = BUTTON_HEIGHT;
        g_state.widgetY -= BUTTON_HEIGHT + DEFAULT_SPACING;

        bool over = enabled && inRect(x, y, w, h);
        bool res = buttonLogic(id, over);

        addGfxCmdRoundedRect((float)x, (float)y, (float)w, (float)h, (float)BUTTON_HEIGHT/2-1, imguiRGBA(128,128,128, isActive(id)?196:96));
        if (enabled)
                addGfxCmdText(x+BUTTON_HEIGHT/2, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, isHot(id) ? imguiRGBA(255,196,0,255) : imguiRGBA(255,255,255,200));
        else
                addGfxCmdText(x+BUTTON_HEIGHT/2, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, imguiRGBA(128,128,128,200));

        return res;
}

bool imguiItem(const char* text, bool enabled)
{
        g_state.widgetId++;
        unsigned int id = (g_state.areaId<<16) | g_state.widgetId;
        
        int x = g_state.widgetX;
        int y = g_state.widgetY - BUTTON_HEIGHT;
        int w = g_state.widgetW;
        int h = BUTTON_HEIGHT;
        g_state.widgetY -= BUTTON_HEIGHT + DEFAULT_SPACING;
        
        bool over = enabled && inRect(x, y, w, h);
        bool res = buttonLogic(id, over);
        
        if (isHot(id))
                addGfxCmdRoundedRect((float)x, (float)y, (float)w, (float)h, 2.0f, imguiRGBA(255,196,0,isActive(id)?196:96));

        if (enabled)
                addGfxCmdText(x+BUTTON_HEIGHT/2, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, imguiRGBA(255,255,255,200));
        else
                addGfxCmdText(x+BUTTON_HEIGHT/2, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, imguiRGBA(128,128,128,200));
        
        return res;
}

bool imguiCheck(const char* text, bool checked, bool enabled)
{
        g_state.widgetId++;
        unsigned int id = (g_state.areaId<<16) | g_state.widgetId;
        
        int x = g_state.widgetX;
        int y = g_state.widgetY - BUTTON_HEIGHT;
        int w = g_state.widgetW;
        int h = BUTTON_HEIGHT;
        g_state.widgetY -= BUTTON_HEIGHT + DEFAULT_SPACING;

        bool over = enabled && inRect(x, y, w, h);
        bool res = buttonLogic(id, over);
        
        const int cx = x+BUTTON_HEIGHT/2-CHECK_SIZE/2;
        const int cy = y+BUTTON_HEIGHT/2-CHECK_SIZE/2;
        addGfxCmdRoundedRect((float)cx-3, (float)cy-3, (float)CHECK_SIZE+6, (float)CHECK_SIZE+6, 4, imguiRGBA(128,128,128, isActive(id)?196:96));
        if (checked)
        {
                if (enabled)
                        addGfxCmdRoundedRect((float)cx, (float)cy, (float)CHECK_SIZE, (float)CHECK_SIZE, (float)CHECK_SIZE/2-1, imguiRGBA(255,255,255,isActive(id)?255:200));
                else
                        addGfxCmdRoundedRect((float)cx, (float)cy, (float)CHECK_SIZE, (float)CHECK_SIZE, (float)CHECK_SIZE/2-1, imguiRGBA(128,128,128,200));
        }

        if (enabled)
                addGfxCmdText(x+BUTTON_HEIGHT, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, isHot(id) ? imguiRGBA(255,196,0,255) : imguiRGBA(255,255,255,200));
        else
                addGfxCmdText(x+BUTTON_HEIGHT, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, imguiRGBA(128,128,128,200));

        return res;
}

bool imguiCollapse(const char* text, const char* subtext, bool checked, bool enabled)
{
        g_state.widgetId++;
        unsigned int id = (g_state.areaId<<16) | g_state.widgetId;
        
        int x = g_state.widgetX;
        int y = g_state.widgetY - BUTTON_HEIGHT;
        int w = g_state.widgetW;
        int h = BUTTON_HEIGHT;
        g_state.widgetY -= BUTTON_HEIGHT; // + DEFAULT_SPACING;

        const int cx = x+BUTTON_HEIGHT/2-CHECK_SIZE/2;
        const int cy = y+BUTTON_HEIGHT/2-CHECK_SIZE/2;

        bool over = enabled && inRect(x, y, w, h);
        bool res = buttonLogic(id, over);
        
        if (checked)
                addGfxCmdTriangle(cx, cy, CHECK_SIZE, CHECK_SIZE, 2, imguiRGBA(255,255,255,isActive(id)?255:200));
        else
                addGfxCmdTriangle(cx, cy, CHECK_SIZE, CHECK_SIZE, 1, imguiRGBA(255,255,255,isActive(id)?255:200));

        if (enabled)
                addGfxCmdText(x+BUTTON_HEIGHT, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, isHot(id) ? imguiRGBA(255,196,0,255) : imguiRGBA(255,255,255,200));
        else
                addGfxCmdText(x+BUTTON_HEIGHT, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, imguiRGBA(128,128,128,200));

        if (subtext)
                addGfxCmdText(x+w-BUTTON_HEIGHT/2, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_RIGHT, subtext, imguiRGBA(255,255,255,128));
        
        return res;
}

void imguiLabel(const char* text)
{
        int x = g_state.widgetX;
        int y = g_state.widgetY - BUTTON_HEIGHT;
        g_state.widgetY -= BUTTON_HEIGHT;
        addGfxCmdText(x, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, imguiRGBA(255,255,255,255));
}

void imguiValue(const char* text)
{
        const int x = g_state.widgetX;
        const int y = g_state.widgetY - BUTTON_HEIGHT;
        const int w = g_state.widgetW;
        g_state.widgetY -= BUTTON_HEIGHT;
        
        addGfxCmdText(x+w-BUTTON_HEIGHT/2, y+BUTTON_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_RIGHT, text, imguiRGBA(255,255,255,200));
}

bool imguiSlider(const char* text, float* val, float vmin, float vmax, float vinc, bool enabled)
{
        g_state.widgetId++;
        unsigned int id = (g_state.areaId<<16) | g_state.widgetId;
        
        int x = g_state.widgetX;
        int y = g_state.widgetY - BUTTON_HEIGHT;
        int w = g_state.widgetW;
        int h = SLIDER_HEIGHT;
        g_state.widgetY -= SLIDER_HEIGHT + DEFAULT_SPACING;

        addGfxCmdRoundedRect((float)x, (float)y, (float)w, (float)h, 4.0f, imguiRGBA(0,0,0,128));

        const int range = w - SLIDER_MARKER_WIDTH;

        float u = (*val - vmin) / (vmax-vmin);
        if (u < 0) u = 0;
        if (u > 1) u = 1;
        int m = (int)(u * range);

        bool over = enabled && inRect(x+m, y, SLIDER_MARKER_WIDTH, SLIDER_HEIGHT);
        bool res = buttonLogic(id, over);
        bool valChanged = false;

        if (isActive(id))
        {
                if (g_state.wentActive)
                {
                        g_state.dragX = g_state.mx;
                        g_state.dragOrig = u;
                }
                if (g_state.dragX != g_state.mx)
                {
                        u = g_state.dragOrig + (float)(g_state.mx - g_state.dragX) / (float)range;
                        if (u < 0) u = 0;
                        if (u > 1) u = 1;
                        *val = vmin + u*(vmax-vmin);
                        *val = floorf(*val/vinc+0.5f)*vinc; // Snap to vinc
                        m = (int)(u * range);
                        valChanged = true;
                }
        }

        if (isActive(id))
                addGfxCmdRoundedRect((float)(x+m), (float)y, (float)SLIDER_MARKER_WIDTH, (float)SLIDER_HEIGHT, 4.0f, imguiRGBA(255,255,255,255));
        else
                addGfxCmdRoundedRect((float)(x+m), (float)y, (float)SLIDER_MARKER_WIDTH, (float)SLIDER_HEIGHT, 4.0f, isHot(id) ? imguiRGBA(255,196,0,128) : imguiRGBA(255,255,255,64));

        // TODO: fix this, take a look at 'nicenum'.
        int digits = (int)(ceilf(log10f(vinc)));
        char fmt[16];
        snprintf(fmt, 16, "%%.%df", digits >= 0 ? 0 : -digits);
        char msg[128];
        snprintf(msg, 128, fmt, *val);
        
        if (enabled)
        {
                addGfxCmdText(x+SLIDER_HEIGHT/2, y+SLIDER_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, isHot(id) ? imguiRGBA(255,196,0,255) : imguiRGBA(255,255,255,200));
                addGfxCmdText(x+w-SLIDER_HEIGHT/2, y+SLIDER_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_RIGHT, msg, isHot(id) ? imguiRGBA(255,196,0,255) : imguiRGBA(255,255,255,200));
        }
        else
        {
                addGfxCmdText(x+SLIDER_HEIGHT/2, y+SLIDER_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_LEFT, text, imguiRGBA(128,128,128,200));
                addGfxCmdText(x+w-SLIDER_HEIGHT/2, y+SLIDER_HEIGHT/2-TEXT_HEIGHT/2, IMGUI_ALIGN_RIGHT, msg, imguiRGBA(128,128,128,200));
        }

        return res || valChanged;
}


void imguiIndent()
{
        g_state.widgetX += INDENT_SIZE;
        g_state.widgetW -= INDENT_SIZE;
}

void imguiUnindent()
{
        g_state.widgetX -= INDENT_SIZE;
        g_state.widgetW += INDENT_SIZE;
}

void imguiSeparator()
{
        g_state.widgetY -= DEFAULT_SPACING*3;
}

void imguiSeparatorLine()
{
        int x = g_state.widgetX;
        int y = g_state.widgetY - DEFAULT_SPACING*2;
        int w = g_state.widgetW;
        int h = 1;
        g_state.widgetY -= DEFAULT_SPACING*4;

        addGfxCmdRect((float)x, (float)y, (float)w, (float)h, imguiRGBA(255,255,255,32));
}

void imguiDrawText(int x, int y, int align, const char* text, unsigned int color)
{
        addGfxCmdText(x, y, align, text, color);
}

void imguiDrawLine(float x0, float y0, float x1, float y1, float r, unsigned int color)
{
        addGfxCmdLine(x0, y0, x1, y1, r, color);
}

void imguiDrawRect(float x, float y, float w, float h, unsigned int color)
{
        addGfxCmdRect(x, y, w, h, color);
}

void imguiDrawRoundedRect(float x, float y, float w, float h, float r, unsigned int color)
{
        addGfxCmdRoundedRect(x, y, w, h, r, color);
}