xpdfviewer.cc

这是一个做pdf阅读器的源代码文件,是大家学习阅读器资料的很好参考

  XtSetArg(args[n], XmNitemCount, nZoomMenuItems); ++n;
  zoomComboBox = XmCreateComboBox(toolBar, "zoomComboBox", args, n);
  for (i = 0; i < nZoomMenuItems; ++i) {
    XmStringFree(st[i]);
  }
  addToolTip(zoomComboBox, "Zoom");
  XtAddCallback(zoomComboBox, XmNselectionCallback,
		&zoomComboBoxCbk, (XtPointer)this);
  XtManageChild(zoomComboBox);
  zoomWidget = zoomComboBox;
#else
  Widget menuPane;
  char buf[16];
  n = 0;
  menuPane = XmCreatePulldownMenu(toolBar, "zoomMenuPane", args, n);
  for (i = 0; i < nZoomMenuItems; ++i) {
    n = 0;
    s = XmStringCreateLocalized(zoomMenuInfo[i].label);
    XtSetArg(args[n], XmNlabelString, s); ++n;
    XtSetArg(args[n], XmNuserData, (XtPointer)i); ++n;
    sprintf(buf, "zoom%d", i);
    btn = XmCreatePushButton(menuPane, buf, args, n);
    XmStringFree(s);
    XtManageChild(btn);
    XtAddCallback(btn, XmNactivateCallback,
		  &zoomMenuCbk, (XtPointer)this);
    zoomMenuBtns[i] = btn;
  }
  n = 0;
  XtSetArg(args[n], XmNleftAttachment, XmATTACH_WIDGET); ++n;
  XtSetArg(args[n], XmNleftWidget, pageCountLabel); ++n;
  XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNmarginWidth, 0); ++n;
  XtSetArg(args[n], XmNmarginHeight, 0); ++n;
  XtSetArg(args[n], XmNsubMenuId, menuPane); ++n;
  zoomMenu = XmCreateOptionMenu(toolBar, "zoomMenu", args, n);
  addToolTip(zoomMenu, "Zoom");
  XtManageChild(zoomMenu);
  zoomWidget = zoomMenu;
#endif

  // find/print/about buttons
  n = 0;
  XtSetArg(args[n], XmNleftAttachment, XmATTACH_WIDGET); ++n;
  XtSetArg(args[n], XmNleftWidget, zoomWidget); ++n;
  XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNmarginWidth, 6); ++n;
  XtSetArg(args[n], XmNlabelString, emptyString); ++n;
  findBtn = XmCreatePushButton(toolBar, "find", args, n);
  addToolTip(findBtn, "Find");
  XtManageChild(findBtn);
  XtAddCallback(findBtn, XmNactivateCallback,
		&findCbk, (XtPointer)this);
  n = 0;
  XtSetArg(args[n], XmNleftAttachment, XmATTACH_WIDGET); ++n;
  XtSetArg(args[n], XmNleftWidget, findBtn); ++n;
  XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNmarginWidth, 6); ++n;
  XtSetArg(args[n], XmNlabelString, emptyString); ++n;
  printBtn = XmCreatePushButton(toolBar, "print", args, n);
  addToolTip(printBtn, "Print");
  XtManageChild(printBtn);
  XtAddCallback(printBtn, XmNactivateCallback,
		&printCbk, (XtPointer)this);
  n = 0;
  XtSetArg(args[n], XmNleftAttachment, XmATTACH_WIDGET); ++n;
  XtSetArg(args[n], XmNleftWidget, printBtn); ++n;
  XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNmarginWidth, 6); ++n;
  XtSetArg(args[n], XmNlabelString, emptyString); ++n;
  aboutBtn = XmCreatePushButton(toolBar, "about", args, n);
  addToolTip(aboutBtn, "About / help");
  XtManageChild(aboutBtn);
  XtAddCallback(aboutBtn, XmNactivateCallback,
		&aboutCbk, (XtPointer)this);
  lastBtn = aboutBtn;

  // quit button
  n = 0;
  XtSetArg(args[n], XmNrightAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNmarginWidth, 6); ++n;
  s = XmStringCreateLocalized("Quit");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  quitBtn = XmCreatePushButton(toolBar, "quit", args, n);
  XmStringFree(s);
  XtManageChild(quitBtn);
  XtAddCallback(quitBtn, XmNactivateCallback,
		&quitCbk, (XtPointer)this);

  // link label
  n = 0;
  XtSetArg(args[n], XmNleftAttachment, XmATTACH_WIDGET); ++n;
  XtSetArg(args[n], XmNleftWidget, lastBtn); ++n;
  XtSetArg(args[n], XmNrightAttachment, XmATTACH_WIDGET); ++n;
  XtSetArg(args[n], XmNrightWidget, quitBtn); ++n;
  XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM); ++n;
  XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM); ++n;
  s = XmStringCreateLocalized("");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  XtSetArg(args[n], XmNrecomputeSize, True); ++n;
  XtSetArg(args[n], XmNalignment, XmALIGNMENT_BEGINNING); ++n;
  linkLabel = XmCreateLabel(toolBar, "linkLabel", args, n);
  XmStringFree(s);
  XtManageChild(linkLabel);

  XmStringFree(emptyString);
}

#ifndef DISABLE_OUTLINE
void XPDFViewer::initPanedWin(Widget parent) {
  Widget clipWin;
  Arg args[20];
  int n;

  // paned window
  n = 0;
  XtSetArg(args[n], XmNorientation, XmHORIZONTAL); ++n;
#if defined(__sgi) && (XmVERSION <= 1)
  panedWin = SgCreateHorzPanedWindow(parent, "panedWin", args, n);
#else
  panedWin = XmCreatePanedWindow(parent, "panedWin", args, n);
#endif
  XtManageChild(panedWin);

  // scrolled window for outline container
  n = 0;
  XtSetArg(args[n], XmNpositionIndex, 0); ++n;
  XtSetArg(args[n], XmNallowResize, True); ++n;
  XtSetArg(args[n], XmNpaneMinimum, 1); ++n;
  XtSetArg(args[n], XmNpaneMaximum, 10000); ++n;
#if !(defined(__sgi) && (XmVERSION <= 1))
  XtSetArg(args[n], XmNwidth, 1); ++n;
#endif
  XtSetArg(args[n], XmNscrollingPolicy, XmAUTOMATIC); ++n;
  outlineScroll = XmCreateScrolledWindow(panedWin, "outlineScroll", args, n);
  XtManageChild(outlineScroll);
  XtVaGetValues(outlineScroll, XmNclipWindow, &clipWin, NULL);
  XtVaSetValues(clipWin, XmNbackground, app->getPaperPixel(), NULL);

  // outline tree
  n = 0;
  XtSetArg(args[n], XmNbackground, app->getPaperPixel()); ++n;
  outlineTree = XPDFCreateTree(outlineScroll, "outlineTree", args, n);
  XtManageChild(outlineTree);
  XtAddCallback(outlineTree, XPDFNselectionCallback, &outlineSelectCbk,
		(XtPointer)this);
}
#endif

void XPDFViewer::initCore(Widget parent, GBool fullScreen) {
  core = new XPDFCore(win, parent,
		      app->getPaperRGB(), app->getPaperPixel(),
		      app->getMattePixel(fullScreen),
		      fullScreen, app->getReverseVideo(),
		      app->getInstallCmap(), app->getRGBCubeSize());
  core->setUpdateCbk(&updateCbk, this);
  core->setActionCbk(&actionCbk, this);
  core->setKeyPressCbk(&keyPressCbk, this);
  core->setMouseCbk(&mouseCbk, this);
}

void XPDFViewer::initPopupMenu() {
  Widget btn;
  Arg args[20];
  int n;
  XmString s, s2;

  n = 0;
#if XmVersion < 1002
  // older versions of Motif need this, newer ones choke on it,
  // sometimes not displaying the menu at all, maybe depending on the
  // state of the NumLock key (taken from DDD)
  XtSetArg(args[n], XmNmenuPost, "<Btn3Down>"); ++n;
#endif
  popupMenu = XmCreatePopupMenu(core->getDrawAreaWidget(), "popupMenu",
				args, n);
  n = 0;
  s = XmStringCreateLocalized("Open...");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  s2 = XmStringCreateLocalized("O");
  XtSetArg(args[n], XmNacceleratorText, s2); ++n;
  btn = XmCreatePushButton(popupMenu, "open", args, n);
  XmStringFree(s);
  XmStringFree(s2);
  XtManageChild(btn);
  XtAddCallback(btn, XmNactivateCallback,
		&openCbk, (XtPointer)this);
  n = 0;
  s = XmStringCreateLocalized("Open in new window...");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  btn = XmCreatePushButton(popupMenu, "openInNewWindow", args, n);
  XmStringFree(s);
  XtManageChild(btn);
  XtAddCallback(btn, XmNactivateCallback,
		&openInNewWindowCbk, (XtPointer)this);
  n = 0;
  s = XmStringCreateLocalized("Reload");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  s2 = XmStringCreateLocalized("R");
  XtSetArg(args[n], XmNacceleratorText, s2); ++n;
  btn = XmCreatePushButton(popupMenu, "reload", args, n);
  XmStringFree(s);
  XmStringFree(s2);
  XtManageChild(btn);
  XtAddCallback(btn, XmNactivateCallback,
		&reloadCbk, (XtPointer)this);
  n = 0;
  s = XmStringCreateLocalized("Save as...");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  btn = XmCreatePushButton(popupMenu, "saveAs", args, n);
  XmStringFree(s);
  XtManageChild(btn);
  XtAddCallback(btn, XmNactivateCallback,
		&saveAsCbk, (XtPointer)this);
  n = 0;
  btn = XmCreateSeparator(popupMenu, "sep1", args, n);
  XtManageChild(btn);
  n = 0;
  s = XmStringCreateLocalized("Continuous view");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  XtSetArg(args[n], XmNindicatorType, XmN_OF_MANY); ++n;
  XtSetArg(args[n], XmNvisibleWhenOff, True); ++n;
  XtSetArg(args[n], XmNset, core->getContinuousMode() ? XmSET : XmUNSET); ++n;
  btn = XmCreateToggleButton(popupMenu, "continuousMode", args, n);
  XmStringFree(s);
  XtManageChild(btn);
  XtAddCallback(btn, XmNvalueChangedCallback,
		&continuousModeToggleCbk, (XtPointer)this);
  n = 0;
  s = XmStringCreateLocalized("Full screen");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  XtSetArg(args[n], XmNindicatorType, XmN_OF_MANY); ++n;
  XtSetArg(args[n], XmNvisibleWhenOff, True); ++n;
  XtSetArg(args[n], XmNset, core->getFullScreen() ? XmSET : XmUNSET); ++n;
  btn = XmCreateToggleButton(popupMenu, "fullScreen", args, n);
  XmStringFree(s);
  XtManageChild(btn);
  XtAddCallback(btn, XmNvalueChangedCallback,
		&fullScreenToggleCbk, (XtPointer)this);
  n = 0;
  s = XmStringCreateLocalized("Rotate counterclockwise");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  btn = XmCreatePushButton(popupMenu, "rotateCCW", args, n);
  XmStringFree(s);
  XtManageChild(btn);
  XtAddCallback(btn, XmNactivateCallback,
		&rotateCCWCbk, (XtPointer)this);
  n = 0;
  s = XmStringCreateLocalized("Rotate clockwise");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  btn = XmCreatePushButton(popupMenu, "rotateCW", args, n);
  XmStringFree(s);
  XtManageChild(btn);
  XtAddCallback(btn, XmNactivateCallback,
		&rotateCWCbk, (XtPointer)this);
  n = 0;
  s = XmStringCreateLocalized("Zoom to selection");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  btn = XmCreatePushButton(popupMenu, "zoomToSelection", args, n);
  XmStringFree(s);
  XtManageChild(btn);
  XtAddCallback(btn, XmNactivateCallback,
		&zoomToSelectionCbk, (XtPointer)this);
  n = 0;
  btn = XmCreateSeparator(popupMenu, "sep2", args, n);
  XtManageChild(btn);
  n = 0;
  s = XmStringCreateLocalized("Close");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  s2 = XmStringCreateLocalized("Ctrl+W");
  XtSetArg(args[n], XmNacceleratorText, s2); ++n;
  btn = XmCreatePushButton(popupMenu, "close", args, n);
  XmStringFree(s);
  XmStringFree(s2);
  XtManageChild(btn);
  XtAddCallback(btn, XmNactivateCallback,
		&closeCbk, (XtPointer)this);
  n = 0;
  s = XmStringCreateLocalized("Quit");
  XtSetArg(args[n], XmNlabelString, s); ++n;
  s2 = XmStringCreateLocalized("Q");
  XtSetArg(args[n], XmNacceleratorText, s2); ++n;
  btn = XmCreatePushButton(popupMenu, "quit", args, n);
  XmStringFree(s);
  XmStringFree(s2);
  XtManageChild(btn);
  XtAddCallback(btn, XmNactivateCallback,
		&quitCbk, (XtPointer)this);

  // this is magic (taken from DDD) - weird things happen if this
  // call isn't made
  XtUngrabButton(core->getDrawAreaWidget(), AnyButton, AnyModifier);
}

void XPDFViewer::addToolTip(Widget widget, char *text) {
#ifdef XmNtoolTipString
  XmString s;
  Cardinal n, i;
  WidgetList children;

  if (XtIsComposite(widget)) {
    XtVaGetValues(widget, XmNnumChildren, &n, XmNchildren, &children, NULL);
    for (i = 0; i < n; ++i) {
      addToolTip(children[i], text);
    }
  } else {
    s = XmStringCreateLocalized(text);
    XtVaSetValues(widget, XmNtoolTipString, s, NULL);
    XmStringFree(s);
  }
#endif
}

void XPDFViewer::mapWindow() {
#ifdef HAVE_X11_XPM_H
  Pixmap iconPixmap;
#endif
  int depth;
  Pixel fg, bg, arm;

  // show the window
  XtPopup(win, XtGrabNone);
  core->takeFocus();

  // create the icon
#ifdef HAVE_X11_XPM_H
  if (XpmCreatePixmapFromData(display, XtWindow(win), xpdfIcon,
			      &iconPixmap, NULL, NULL) == XpmSuccess) {
    XtVaSetValues(win, XmNiconPixmap, iconPixmap, NULL);
  }
#endif

  // set button bitmaps (must be done after the window is mapped)
  if (toolBar != None) {
    XtVaGetValues(backBtn, XmNdepth, &depth,
		  XmNforeground, &fg, XmNbackground, &bg,
		  XmNarmColor, &arm, NULL);
    XtVaSetValues(backBtn, XmNlabelType, XmPIXMAP,
		  XmNlabelPixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)backArrow_bits,
					      backArrow_width,
					      backArrow_height,
					      fg, bg, depth),
		  XmNarmPixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)backArrow_bits,
					      backArrow_width,
					      backArrow_height,
					      fg, arm, depth),
		  XmNlabelInsensitivePixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)backArrowDis_bits,
					      backArrowDis_width,
					      backArrowDis_height,
					      fg, bg, depth),
		  NULL);
    XtVaSetValues(prevTenPageBtn, XmNlabelType, XmPIXMAP,
		  XmNlabelPixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)dblLeftArrow_bits,
					      dblLeftArrow_width,
					      dblLeftArrow_height,
					      fg, bg, depth),
		  XmNarmPixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)dblLeftArrow_bits,
					      dblLeftArrow_width,
					      dblLeftArrow_height,
					      fg, arm, depth),
		  XmNlabelInsensitivePixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)dblLeftArrowDis_bits,
					      dblLeftArrowDis_width,
					      dblLeftArrowDis_height,
					      fg, bg, depth),
		  NULL);
    XtVaSetValues(prevPageBtn, XmNlabelType, XmPIXMAP,
		  XmNlabelPixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)leftArrow_bits,
					      leftArrow_width,
					      leftArrow_height,
					      fg, bg, depth),
		  XmNarmPixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)leftArrow_bits,
					      leftArrow_width,
					      leftArrow_height,
					      fg, arm, depth),
		  XmNlabelInsensitivePixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)leftArrowDis_bits,
					      leftArrowDis_width,
					      leftArrowDis_height,
					      fg, bg, depth),
		  NULL);
    XtVaSetValues(nextPageBtn, XmNlabelType, XmPIXMAP,
		  XmNlabelPixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)rightArrow_bits,
					      rightArrow_width,
					      rightArrow_height,
					      fg, bg, depth),
		  XmNarmPixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)rightArrow_bits,
					      rightArrow_width,
					      rightArrow_height,
					      fg, arm, depth),
		  XmNlabelInsensitivePixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(toolBar),
					      (char *)rightArrowDis_bits,
					      rightArrowDis_width,
					      rightArrowDis_height,
					      fg, bg, depth),
		  NULL);
    XtVaSetValues(nextTenPageBtn, XmNlabelType, XmPIXMAP,
		  XmNlabelPixmap,
		  XCreatePixmapFromBitmapData(display, XtWindow(