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Control.c

/* 
A* -------------------------------------------------------------------
B* This file contains source code for the PyMOL computer program
C* copyright 1998-2000 by Warren Lyford Delano of DeLano Scientific. 
D* -------------------------------------------------------------------
E* It is unlawful to modify or remove this copyright notice.
F* -------------------------------------------------------------------
G* Please see the accompanying LICENSE file for further information. 
H* -------------------------------------------------------------------
I* Additional authors of this source file include:
-* 
-* 
-*
Z* -------------------------------------------------------------------
*/
#include"os_predef.h"
#include"os_std.h"
#include"os_gl.h"

#include "main.h"
#include "Base.h"
#include "Control.h"
#include "Scene.h"
#include "Executive.h"
#include "Setting.h"
#include "P.h"
#include "Seq.h"
#include"Movie.h"
#include "Text.h"
#include "Util.h"
#include "Ortho.h"

#define cControlBoxSize 17
#define cControlLeftMargin 8
#define cControlTopMargin 2
#define cControlSpacing 2
#define cControlInnerMargin 4
#define cControlSpread 6
#define cControlSize 160

#define cControlButtons 7

#define cControlMinWidth 5

#define SDOF_QUEUE_MASK 0x1F

00048 struct _CControl {
  Block *Block;
  int DragFlag;
  int LastPos;
  int ExtraSpace;
  float ButtonColor[3];
  float ActiveColor[3];
  int Pressed, Active;
  int SaveWidth;
  double LastClickTime;
  int SkipRelease;
  int NButton;

  /* not saved */

  int sdofActive;
  double sdofLastIterTime;
  int sdofMode;
  float sdofTrans[3];
  float sdofRot[3];
  unsigned int sdofWroteTo, sdofReadFrom;       /* queue synchronization fields */
  float sdofBuffer[(SDOF_QUEUE_MASK + 1) * 6];
};

int ControlSdofButton(PyMOLGlobals * G, int button)
{
  CControl *I = G->Control;
  if(I) {
    if(button == 1) {           /* LEFT */
      if(I->sdofMode != SDOF_DRAG_MODE) {
        I->sdofMode = SDOF_DRAG_MODE;
        OrthoAddOutput(G, " SDOF: Drag mode.\n");
      } else {
        I->sdofMode = SDOF_NORMAL_MODE;
        OrthoAddOutput(G, " SDOF: Normal mode.\n");
      }
    } else if(button == 2) {    /* RIGHT */
      if(I->sdofMode != SDOF_CLIP_MODE) {
        I->sdofMode = SDOF_CLIP_MODE;
        OrthoAddOutput(G, " SDOF: Clip mode.\n");
      } else {
        I->sdofMode = SDOF_NORMAL_MODE;
        OrthoAddOutput(G, " SDOF: Normal mode.\n");
      }
    }
    OrthoDirty(G);
  }
  return 1;
}

int ControlSdofUpdate(PyMOLGlobals * G, float tx, float ty, float tz, float rx, float ry,
                      float rz)
{
  /* may be called asynchronously anytime after CControl has been initialized */

  CControl *I = G->Control;
  if(I) {
    if(((I->sdofWroteTo - I->sdofReadFrom) & SDOF_QUEUE_MASK) < SDOF_QUEUE_MASK) {
      /* a free slot exists */
      int slot = (I->sdofWroteTo + 1) & SDOF_QUEUE_MASK;
      float *buffer = I->sdofBuffer + (6 * slot);

      buffer[0] = tx;
      buffer[1] = ty;
      buffer[2] = tz;
      buffer[3] = rx;
      buffer[4] = ry;
      buffer[5] = rz;

      I->sdofWroteTo = slot;

      {
        float tol = 0.0001;
        int active = (fabs(buffer[0]) >= tol) || (fabs(buffer[1]) >= tol)
          || (fabs(buffer[2]) >= tol)
          || (fabs(buffer[3]) >= tol) || (fabs(buffer[4]) >= tol)
          || (fabs(buffer[5]) >= tol);
        if(active && !I->sdofActive) {
          I->sdofLastIterTime = UtilGetSeconds(G);
        }
        I->sdofActive = active;
      }
      /*printf("wrote %8.3f %8.3f %8.3f %8.3f %8.3f %8.3f %d %d %d\n",tx,ty,tz,rx,ry,rz,I->sdofReadFrom,I->sdofWroteTo,slot); */
    }
  }
  return 1;
}

int ControlSdofIterate(PyMOLGlobals * G)
{
  CControl *I = G->Control;
  if(I->sdofWroteTo != I->sdofReadFrom) {
    int slot = I->sdofWroteTo;

    /* new data available */

    float *buffer = I->sdofBuffer + (6 * slot);

    I->sdofTrans[0] = buffer[0];
    I->sdofTrans[1] = buffer[1];
    I->sdofTrans[2] = buffer[2];
    I->sdofRot[0] = buffer[3];
    I->sdofRot[1] = buffer[4];
    I->sdofRot[2] = buffer[5];

    I->sdofReadFrom = slot;
  }

  if(I->sdofActive) {
    double now = UtilGetSeconds(G);
    double delta = now - I->sdofLastIterTime;
    I->sdofLastIterTime = now;

    {
      /* suppress small amounts of combined motion using a truncated switching function */

      float len_rot = length3f(I->sdofRot);
      float len_trans = length3f(I->sdofTrans);
      float *dom, *sub;
      if(len_rot > len_trans) {
        dom = &len_rot;
        sub = &len_trans;
      } else {
        dom = &len_trans;
        sub = &len_rot;
      }

      {
        float expo = 2.0F;
        float trnc = 0.05F;
        float sub_fxn = (*sub) / (*dom);
        if(sub_fxn < trnc) {
          sub_fxn = 0.0F;
        } else if(sub_fxn < 0.5F) {
          sub_fxn = (sub_fxn - trnc) / (0.5F - trnc);
          sub_fxn = (float) pow(sub_fxn, expo);
        } else {
          sub_fxn = 1.0F - (float) pow(1.0F - sub_fxn, expo);
        }
        *dom = 1.0F;
        *sub = sub_fxn;
        scale3f(I->sdofTrans, len_trans, I->sdofTrans);
        scale3f(I->sdofRot, len_rot, I->sdofRot);
      }
    }
    /* translate */
    SceneTranslateScaled(G,
                         delta * I->sdofTrans[0],
                         -delta * I->sdofTrans[1], -delta * I->sdofTrans[2], I->sdofMode);

    /* rotate */
    SceneRotateScaled(G,
                      2.0F * delta * I->sdofRot[0],
                      -2.0F * delta * I->sdofRot[1],
                      -2.0F * delta * I->sdofRot[2], I->sdofMode);

    SceneDirty(G);
  }
  return 1;
}

int ControlRocking(PyMOLGlobals * G)
{
  if(G->Interrupt) {
    SettingSetGlobal_b(G, cSetting_rock, false);
  }
  return SettingGetGlobal_b(G, cSetting_rock);
}

static void ControlReshape(Block * block, int width, int height)
{
  PyMOLGlobals *G = block->G;
  register CControl *I = G->Control;
  BlockReshape(block, width, height);
  /* this is a pragmatic workaround for mac X11 where the nub gets
     hidden by the window expansion tab */

  if((block->rect.right - block->rect.left) < 20) {
    block->rect.top = block->rect.top + 10;
  }

  I->ExtraSpace = ((block->rect.right - block->rect.left) - cControlSize);
  if(I->ExtraSpace < 0)
    I->ExtraSpace = 0;
}

static int which_button(CControl * I, int x, int y)
{
  int result = -1;
  x -= I->Block->rect.left + cControlLeftMargin;
  y -= I->Block->rect.top - cControlTopMargin;
  if(x >= 0)
    if((y <= 0) && (y > (-cControlBoxSize))) {
      int control_width =
        I->Block->rect.right - (I->Block->rect.left + cControlLeftMargin);
      result = (I->NButton * x) / control_width;
    }
  return result;
}

static int ControlDrag(Block * block, int x, int y, int mod)
{
  int width;
  int delta;
  int gui_width;
  PyMOLGlobals *G = block->G;
  register CControl *I = G->Control;
  if(!I->SkipRelease) {
    delta = x - I->LastPos;
    if(I->DragFlag) {
      if(delta) {
        gui_width = (int) SettingGet(G, cSetting_internal_gui_width) - delta;
        if(gui_width < cControlMinWidth)
          gui_width = cControlMinWidth;
        delta = (int) SettingGet(G, cSetting_internal_gui_width) - gui_width;
        width = OrthoGetWidth(G) + delta;
        I->LastPos = x;
        I->SaveWidth = 0;
        SettingSet(G, cSetting_internal_gui_width, (float) gui_width);
        OrthoReshape(G, -1, -1, false);
      }
    } else {
      I->Active = which_button(I, x, y);
      if(I->Active != I->Pressed)
        I->Active = -1;
      OrthoDirty(G);
    }
  }
  return (1);
}

static int ControlRelease(Block * block, int button, int x, int y, int mod)
{
  PyMOLGlobals *G = block->G;
  register CControl *I = G->Control;

  int sel = 0;

  I->LastPos = x;
  sel = which_button(I, x, y);
  if(!I->SkipRelease) {
    switch (sel) {
    case 0:
      SceneSetFrame(G, 4, 0);
      PLog(G, "cmd.rewind()", cPLog_pym);
      break;
    case 1:
      SceneSetFrame(G, 5, -1);
      PLog(G, "cmd.back()", cPLog_pym);
      break;
    case 2:
      MoviePlay(G, cMovieStop);
      if(SettingGet(G, cSetting_sculpting))
        SettingSet(G, cSetting_sculpting, 0);
      if(SettingGetGlobal_b(G, cSetting_rock))
        SettingSetGlobal_b(G, cSetting_rock, false);
      ExecutiveDrawNow(G);
      OrthoDirty(G);
      PLog(G, "cmd.mstop()", cPLog_pym);
      break;
    case 3:
      if(!MoviePlaying(G)) {
        if(mod & cOrthoCTRL) {
          PLog(G, "cmd.rewind()", cPLog_pym);
          PLog(G, "cmd.mplay()", cPLog_pym);
          SceneSetFrame(G, 4, 0);
          MoviePlay(G, cMoviePlay);
        } else {
          PLog(G, "cmd.mplay()", cPLog_pym);
          MoviePlay(G, cMoviePlay);
        }
      } else {
        MoviePlay(G, cMovieStop);
        ExecutiveDrawNow(G);
        OrthoDirty(G);
        PLog(G, "cmd.mstop()", cPLog_pym);
      }
      break;
    case 4:
      SceneSetFrame(G, 5, 1);
      PLog(G, "cmd.forward()", cPLog_pym);
      break;
    case 5:
      if(mod & cOrthoCTRL) {
        SceneSetFrame(G, 3, 0);
        PLog(G, "cmd.middle()", cPLog_pym);
      } else {
        SceneSetFrame(G, 6, 0);
        PLog(G, "cmd.ending()", cPLog_pym);
      }
      break;
    case 6:
      if(SettingGetGlobal_b(G, cSetting_seq_view)) {
        SettingSetGlobal_b(G, cSetting_seq_view, 0);
        SeqChanged(G);
        PLog(G, "cmd.set('seq_view',0)", cPLog_pym);
      } else {
        SettingSetGlobal_b(G, cSetting_seq_view, 1);
        SeqChanged(G);
        PLog(G, "cmd.set('seq_view',1)", cPLog_pym);
      }
      OrthoDirty(G);
      break;
    case 7:
      SettingSetGlobal_b(G, cSetting_rock, !SettingGetGlobal_b(G, cSetting_rock));
      if(SettingGetGlobal_b(G, cSetting_rock)) {
        SceneRestartSweepTimer(G);
        PLog(G, "cmd.rock(1)", cPLog_pym);
      } else
        PLog(G, "cmd.rock(0)", cPLog_pym);
      SceneRestartFrameTimer(G);
      OrthoDirty(G);
      break;
    case 8:
      PLog(G, "cmd.fullscreen()", cPLog_pym);
      ExecutiveFullScreen(G, -1);
      break;
    }
    OrthoDirty(G);
    OrthoUngrab(G);
    I->LastClickTime = UtilGetSeconds(G);
    I->DragFlag = false;
    I->Active = -1;
    I->Pressed = -1;
  }
  return (1);
}

Block *ControlGetBlock(PyMOLGlobals * G)
{
  register CControl *I = G->Control;
  {
    return (I->Block);
  }
}


/*========================================================================*/
int ControlIdling(PyMOLGlobals * G)
{
  CControl *I = G->Control;
  return (I->sdofActive ||
          MoviePlaying(G) ||
          SettingGetGlobal_b(G, cSetting_rock) || SettingGet(G, cSetting_sculpting));
}


/*========================================================================*/
void ControlInterrupt(PyMOLGlobals * G)
{
  /*  register CControl *I=G->Control; */
  MoviePlay(G, cMovieStop);
  ExecutiveDrawNow(G);
}


/*========================================================================*/
void ControlFree(PyMOLGlobals * G)
{
  register CControl *I = G->Control;
  OrthoFreeBlock(G, I->Block);
  FreeP(G->Control);
}


/*========================================================================*/
int ControlRock(PyMOLGlobals * G, int mode)
{
  switch (mode) {
  case -2:
    break;
  case -1:
    SettingSetGlobal_b(G, cSetting_rock, !SettingGetGlobal_b(G, cSetting_rock));
    if(SettingGetGlobal_b(G, cSetting_rock)) {
      SceneRestartSweepTimer(G);
    }
    break;
  case 0:
    SettingSetGlobal_b(G, cSetting_rock, false);
    break;
  case 1:
    SettingSetGlobal_b(G, cSetting_rock, true);
    SceneRestartSweepTimer(G);
    break;
  }
  if(mode != -2) {
    SceneRestartFrameTimer(G);
    OrthoDirty(G);
  }
  return SettingGetGlobal_b(G, cSetting_rock);
}


/*========================================================================*/
static int ControlClick(Block * block, int button, int x, int y, int mod)
{
  PyMOLGlobals *G = block->G;
  register CControl *I = G->Control;
  I->SkipRelease = false;
  if(x < (I->Block->rect.left + cControlLeftMargin)) {
    y -= I->Block->rect.top - cControlTopMargin;
    if((y <= 0) && (y > (-cControlBoxSize))) {
      double now = UtilGetSeconds(block->G);
      if((now - I->LastClickTime) < 0.35) {
        if(I->SaveWidth) {
          SettingSet(G, cSetting_internal_gui_width, (float) I->SaveWidth);
          OrthoReshape(G, -1, -1, false);
          I->SaveWidth = 0;
        } else {
          I->SaveWidth = (int) SettingGet(G, cSetting_internal_gui_width);
          SettingSet(G, cSetting_internal_gui_width, (float) cControlMinWidth);
          OrthoReshape(G, -1, -1, false);
        }
        I->SkipRelease = true;
      } else {
        I->LastPos = x;
        OrthoGrab(G, block);
        I->DragFlag = true;
        I->LastClickTime = UtilGetSeconds(G);
      }
    }
  } else {
    I->Pressed = which_button(I, x, y);
    I->Active = I->Pressed;
    if(I->Pressed)
      OrthoGrab(G, block);
    OrthoDirty(G);
  }
  return (1);
}

static void draw_button(int x2, int y2, int w, int h, float *light, float *dark,
                        float *inside)
{
  glColor3fv(light);
  glBegin(GL_POLYGON);
  glVertex2i(x2, y2);
  glVertex2i(x2, y2 + h);
  glVertex2i(x2 + w, y2 + h);
  glVertex2i(x2 + w, y2);
  glEnd();

  glColor3fv(dark);
  glBegin(GL_POLYGON);
  glVertex2i(x2 + 1, y2);
  glVertex2i(x2 + 1, y2 + h - 1);
  glVertex2i(x2 + w, y2 + h - 1);
  glVertex2i(x2 + w, y2);
  glEnd();

  glColor3fv(inside);
  glBegin(GL_POLYGON);
  glVertex2i(x2 + 1, y2 + 1);
  glVertex2i(x2 + 1, y2 + h - 1);
  glVertex2i(x2 + w - 1, y2 + h - 1);
  glVertex2i(x2 + w - 1, y2 + 1);
  glEnd();

}


/*========================================================================*/
static void ControlDraw(Block * block)
{
  PyMOLGlobals *G = block->G;
  register CControl *I = G->Control;
  int x, y;
  int nButton = I->NButton;
  int but_num;
  float lightEdge[3] = { 0.65F, 0.65F, 0.65F };
  float darkEdge[3] = { 0.3F, 0.3F, 0.3F };
  float pushed[3] = { 0.8F, 0.8F, 0.8F };

  if(G->HaveGUI && G->ValidContext) {

    int control_width = I->Block->rect.right - (I->Block->rect.left + cControlLeftMargin);

    glColor3fv(I->Block->BackColor);
    BlockFill(I->Block);
    glColor3fv(I->Block->TextColor);

    {
      int top, left, bottom, right;

      left = I->Block->rect.left + 1;
      bottom = I->Block->rect.bottom + 1;
      top = I->Block->rect.top - (cControlTopMargin - 1);
      right = left + 5;

      glColor3f(0.8F, 0.8F, 0.8F);
      glBegin(GL_POLYGON);
      glVertex2i(right, top);
      glVertex2i(right, bottom);
      glVertex2i(left, bottom);
      glVertex2i(left, top);
      glEnd();

      glColor3f(0.3F, 0.3F, 0.3F);
      glBegin(GL_POLYGON);
      glVertex2i(right, top - 1);
      glVertex2i(right, bottom);
      glVertex2i(left + 1, bottom);
      glVertex2i(left + 1, top - 1);
      glEnd();

      glColor3fv(I->ButtonColor);

      glBegin(GL_POLYGON);
      glVertex2i(right - 1, top - 1);
      glVertex2i(right - 1, bottom + 1);
      glVertex2i(left + 1, bottom + 1);
      glVertex2i(left + 1, top - 1);
      glEnd();
    }

    y = I->Block->rect.top - cControlTopMargin;

    for(but_num = 0; but_num < nButton; but_num++) {
      int but_width;
      int but_left;
      int but_bottom;
      int but_height;

      but_left =
        I->Block->rect.left + cControlLeftMargin + (but_num * control_width) / nButton;
      but_width =
        (((but_num + 1) * control_width / nButton) -
         ((but_num) * control_width / nButton)) - 1;

      but_bottom = y - (cControlBoxSize - 1);
      but_height = cControlBoxSize;

      if((but_num == I->Active)) {
        draw_button(but_left, but_bottom,
                    but_width, but_height, lightEdge, darkEdge, pushed);
      } else if(((but_num == 6) && ((int) SettingGet(G, cSetting_seq_view))) ||
                ((but_num == 3) && (MoviePlaying(G))) ||
                ((but_num == 7) && (SettingGetGlobal_b(G, cSetting_rock))) ||
                ((but_num == 8) && (SettingGetGlobal_b(G, cSetting_full_screen)))) {
        draw_button(but_left, but_bottom,
                    but_width, but_height, lightEdge, darkEdge, I->ActiveColor);
      } else {
        draw_button(but_left, but_bottom,
                    but_width, but_height, lightEdge, darkEdge, I->ButtonColor);
      }

      if(control_width > 100) {
        x = but_left + (but_width - cControlBoxSize) / 2;

        glColor3fv(I->Block->TextColor);
        switch (but_num) {
        case 0:
          glBegin(GL_TRIANGLES);
          glVertex2i(x + (cControlBoxSize - 1) - cControlInnerMargin,
                     y - cControlInnerMargin);
          glVertex2i(x + (cControlBoxSize - 1) - cControlInnerMargin,
                     y - (cControlBoxSize - 1) + cControlInnerMargin);
          glVertex2i(x + cControlInnerMargin, y - (cControlBoxSize / 2));
          glEnd();
          glBegin(GL_LINES);
          glVertex2i(x + cControlInnerMargin, y - cControlInnerMargin);
          glVertex2i(x + cControlInnerMargin,
                     y - (cControlBoxSize - 1) + cControlInnerMargin);
          glEnd();
          break;

        case 1:

          glBegin(GL_POLYGON);
          glVertex2i(x + cControlBoxSize / 2 + 2, y - (cControlBoxSize / 2));
          glVertex2i(x + (cControlBoxSize - 1) - cControlInnerMargin,
                     y - cControlInnerMargin);
          glVertex2i(x + cControlInnerMargin, y - (cControlBoxSize / 2));
          glVertex2i(x + (cControlBoxSize - 1) - cControlInnerMargin,
                     y - (cControlBoxSize - 1) + cControlInnerMargin);
          glEnd();
          break;
        case 2:
          glBegin(GL_POLYGON);
          glVertex2i(x + cControlInnerMargin, y - cControlInnerMargin);
          glVertex2i(x + cControlInnerMargin,
                     y - (cControlBoxSize - 1) + cControlInnerMargin);
          glVertex2i(x + (cControlBoxSize - 1) - cControlInnerMargin,
                     y - (cControlBoxSize - 1) + cControlInnerMargin);
          glVertex2i(x + (cControlBoxSize - 1) - cControlInnerMargin,
                     y - cControlInnerMargin);
          glEnd();
          break;

        case 3:
          glBegin(GL_TRIANGLES);
          glVertex2i(x + cControlInnerMargin, y - cControlInnerMargin + 1);
          glVertex2i(x + cControlInnerMargin,
                     y - (cControlBoxSize - 1) + cControlInnerMargin - 1);
          glVertex2i(x + (cControlBoxSize) - cControlInnerMargin,
                     y - (cControlBoxSize / 2));
          glEnd();
          break;
        case 4:
          glBegin(GL_POLYGON);
          glVertex2i(x + cControlBoxSize / 2 - 2, y - (cControlBoxSize / 2));
          glVertex2i(x + cControlInnerMargin, y - cControlInnerMargin);
          glVertex2i(x + (cControlBoxSize - 1) - cControlInnerMargin,
                     y - (cControlBoxSize / 2));
          glVertex2i(x + cControlInnerMargin,
                     y - (cControlBoxSize - 1) + cControlInnerMargin);
          glEnd();

          break;
        case 5:
          glBegin(GL_TRIANGLES);
          glVertex2i(x + cControlInnerMargin, y - cControlInnerMargin);
          glVertex2i(x + cControlInnerMargin,
                     y - (cControlBoxSize - 1) + cControlInnerMargin);
          glVertex2i(x + (cControlBoxSize - 1) - cControlInnerMargin,
                     y - (cControlBoxSize / 2));
          glEnd();
          glBegin(GL_LINES);
          glVertex2i(x + (cControlBoxSize - 1) - cControlInnerMargin,
                     y - cControlInnerMargin);
          glVertex2i(x + (cControlBoxSize - 1) - cControlInnerMargin,
                     y - (cControlBoxSize - 1) + cControlInnerMargin);
          glEnd();
          break;
        case 6:
          TextDrawStrAt(G, "S", x + cControlInnerMargin,
                        y - cControlBoxSize + cControlInnerMargin + 1);
          break;
        case 7:
          /*
             TextDrawStrAt(G,"R",x+cControlInnerMargin,
             y-cControlBoxSize+cControlInnerMargin+1); */
          glBegin(GL_POLYGON);
          glVertex2i(x + (cControlBoxSize / 2) + cControlSpread, y - cControlInnerMargin);
          glVertex2i(x + (cControlBoxSize / 2),
                     y - (cControlBoxSize) + cControlInnerMargin);
          glVertex2i(x + (cControlBoxSize / 2) - cControlSpread, y - cControlInnerMargin);
          glEnd();
          break;
        case 8:
          TextDrawStrAt(G, "F", x + cControlInnerMargin,
                        y - cControlBoxSize + cControlInnerMargin + 1);
          break;
        }
      }
    }
#ifdef _MACPYMOL_XCODE
    if((I->Block->rect.bottom==0) && (!SettingGetGlobal_b(G,cSetting_full_screen))) {
      int x1 = I->Block->rect.right + 1;
      int y1 = I->Block->rect.bottom - 1;
      int x2 = I->Block->rect.right - 3;
      int y2 = I->Block->rect.bottom - 5;

      glColor3f(0.3F, 0.3F, 0.3F);
      glBegin(GL_LINES);
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      x2 -= 4;
      y1 += 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      x2 -= 4;
      y1 += 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      x2 -= 4;
      y1 += 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      y2 += 4;
      x1 -= 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      y2 += 4;
      x1 -= 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      y2 += 4;
      x1 -= 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      glEnd();

      x1 = I->Block->rect.right + 1;
      y1 = I->Block->rect.bottom - 2;
      x2 = I->Block->rect.right - 2;
      y2 = I->Block->rect.bottom - 5;

      glColor3f(0.85F, 0.85F, 0.85F);
      glBegin(GL_LINES);
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      x2 -= 4;
      y1 += 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      x2 -= 4;
      y1 += 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      x2 -= 4;
      y1 += 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      y2 += 4;
      x1 -= 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      y2 += 4;
      x1 -= 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      y2 += 4;
      x1 -= 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      glEnd();

      x1 = I->Block->rect.right + 1;
      y1 = I->Block->rect.bottom - 3;
      x2 = I->Block->rect.right - 1;
      y2 = I->Block->rect.bottom - 5;

      glColor3f(0.7F, 0.7F, 0.7F);
      glBegin(GL_LINES);
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      x2 -= 4;
      y1 += 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      x2 -= 4;
      y1 += 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      x2 -= 4;
      y1 += 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      y2 += 4;
      x1 -= 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      y2 += 4;
      x1 -= 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      y2 += 4;
      x1 -= 4;
      glVertex2i(x1, y1);
      glVertex2i(x2, y2);
      glEnd();

    }
#endif
  }
}


/*========================================================================*/
int ControlInit(PyMOLGlobals * G)
{
  register CControl *I = NULL;

  if((I = (G->Control = Calloc(CControl, 1)))) {

    I->Block = OrthoNewBlock(G, NULL);
    I->Block->fClick = ControlClick;
    I->Block->fDraw = ControlDraw;
    I->Block->fDrag = ControlDrag;
    I->Block->fRelease = ControlRelease;
    I->Block->fReshape = ControlReshape;
    I->Block->active = true;
    I->Block->TextColor[0] = 1.0;
    I->Block->TextColor[1] = 0.75;
    I->Block->TextColor[2] = 0.75;
    I->ButtonColor[0] = 0.5F;
    I->ButtonColor[1] = 0.5F;
    I->ButtonColor[2] = 0.5F;
    I->ActiveColor[0] = 0.65F;
    I->ActiveColor[1] = 0.65F;
    I->ActiveColor[2] = 0.65F;
    I->Pressed = -1;
    I->Active = -1;
    OrthoAttach(G, I->Block, cOrthoTool);
    I->SaveWidth = 0;
    I->LastClickTime = UtilGetSeconds(G);
    I->NButton = 9;
    return 1;
  } else
    return 0;
}

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