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authorJörg Frings-Fürst <debian@jff-webhosting.net>2016-12-28 16:52:56 +0100
committerJörg Frings-Fürst <debian@jff-webhosting.net>2016-12-28 16:52:56 +0100
commit7b358424ebad9349421acd533c2fa1cbf6cf3e3e (patch)
tree686678532eefed525c242fd214d0cfb2914726c5 /app/wlib/gtklib/gtkhelp.c
Initial import of xtrkcad version 1:4.0.2-2
Diffstat (limited to 'app/wlib/gtklib/gtkhelp.c')
-rw-r--r--app/wlib/gtklib/gtkhelp.c733
1 files changed, 733 insertions, 0 deletions
diff --git a/app/wlib/gtklib/gtkhelp.c b/app/wlib/gtklib/gtkhelp.c
new file mode 100644
index 0000000..b02f555
--- /dev/null
+++ b/app/wlib/gtklib/gtkhelp.c
@@ -0,0 +1,733 @@
+/** \file gtkhelp.c
+ * Balloon help ( tooltips) and main help functions.
+ *
+ * $Header: /home/dmarkle/xtrkcad-fork-cvs/xtrkcad/app/wlib/gtklib/gtkhelp.c,v 1.12 2009-10-02 04:30:32 dspagnol Exp $
+ */
+
+/* XTrkCad - Model Railroad CAD
+ * Copyright (C) 2005 Dave Bullis and (C) 2007 Martin Fischer
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <dirent.h>
+#include <sys/time.h>
+#include <signal.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include <stdint.h>
+
+#include <gtk/gtk.h>
+#include <gdk/gdk.h>
+
+#include <webkit/webkit.h>
+
+#include "gtkint.h"
+#include "i18n.h"
+
+void load_into_view (char *file, int requested_view); // Prototype to please clang.
+
+/* globals and defines related to the HTML help window */
+
+#define HTMLERRORTEXT "<html><head><meta http-equiv=\"content-type\" content=\"text/html; charset=US-ASCII\">" \
+ "<title>Help Error</title><body><h1>Error - help information can not be found.</h1><p>" \
+ "The help information you requested cannot be found on this system.<br><pre>%s: %s</pre><p>" \
+ "Usually this is an installation problem, Make sure that XTrackCAD and the included " \
+ "HTML files are installed properly and can be found via the XTRKCADLIB environment " \
+ "variable. Also make sure that the user has sufficient access rights to read these" \
+ "files.</p></body></html>"
+
+
+#define SLIDERPOSDEFAULT 180 /**< default value for slider position */
+
+#define HTMLHELPSECTION "gtklib html help" /**< section name for html help window preferences */
+#define SLIDERPREFNAME "sliderpos" /**< name for the slider position preference */
+#define WINDOWPOSPREFNAME "position" /**< name for the window position preference */
+#define WINDOWSIZEPREFNAME "size" /**< name for the window size preference */
+
+#define BACKBUTTON "back"
+#define FORWARDBUTTON "forward"
+#define HOMEBUTTON "home"
+#define CONTENTBUTTON "contents"
+#define TOCDOC "tocDoc"
+#define CONTENTSDOC "contentsDoc"
+#define TOCVIEW "viewLeft"
+#define CONTENTSVIEW "viewRight"
+#define PANED "hpane"
+
+enum pane_views { MAIN_VIEW, CONTENTS_VIEW };
+
+#define MAXHISTORYSIZE 20
+
+/** \struct htmlHistory
+ * for storing information about the browse history
+ */
+struct htmlHistory {
+ int curShownPage; /**< index of page that is shown currently */
+ int newestPage; /**< index of newest page loaded */
+ int oldestPage; /**< index of earliest page loaded */
+ int bInUse; /**< does buffer have at least one entry */
+ char *url[ MAXHISTORYSIZE ]; /**< array of pages in history */
+};
+
+static struct htmlHistory sHtmlHistory;
+
+#define INCBUFFERINDEX( x ) (((x) + 1 ) % MAXHISTORYSIZE )
+#define DECBUFFERINDEX( x ) ((x) == 0 ? MAXHISTORYSIZE - 1 : (x)-1)
+
+static char *directory; /**< base directory for HTML files */
+
+static GtkWidget *wHelpWindow; /**< handle for the help window */
+static GtkWidget *main_view; /** handle for the help main data pane */
+static GtkWidget *contents_view; /** handle for the help contents pane */
+
+#define GLADE_HOOKUP_OBJECT(component,widget,name) \
+ g_object_set_data_full (G_OBJECT (component), name, \
+ gtk_widget_ref (widget), (GDestroyNotify) gtk_widget_unref)
+
+#define GLADE_HOOKUP_OBJECT_NO_REF(component,widget,name) \
+ g_object_set_data (G_OBJECT (component), name, widget)
+
+static GtkWidget*
+lookup_widget(GtkWidget *widget, const gchar *widget_name)
+{
+ GtkWidget *parent, *found_widget;
+
+ for (;;)
+ {
+ if (GTK_IS_MENU (widget))
+ parent = gtk_menu_get_attach_widget (GTK_MENU (widget));
+ else
+ parent = widget->parent;
+ if (!parent)
+ parent = (GtkWidget*) g_object_get_data (G_OBJECT (widget), "GladeParentKey");
+ if (parent == NULL)
+ break;
+ widget = parent;
+ }
+
+ found_widget = (GtkWidget*) g_object_get_data (G_OBJECT (widget),
+ widget_name);
+ if (!found_widget)
+ g_warning ("Widget not found: %s", widget_name);
+ return found_widget;
+}
+
+
+
+/*
+ ******************************************************************************
+ *
+ * Help
+ *
+ ******************************************************************************
+ */
+
+wBool_t listHelpStrings = FALSE;
+wBool_t listMissingHelpStrings = FALSE;
+static char HelpDataKey[] = "HelpDataKey";
+
+static GtkWidget * balloonF;
+static GtkWidget * balloonPI;
+static wBalloonHelp_t * balloonHelpStrings;
+static int enableBalloonHelp = 1;
+static const char * balloonMsg;
+static wControl_p balloonB;
+static wPos_t balloonDx, balloonDy;
+static wBool_t balloonVisible = FALSE;
+static wControl_p balloonHelpB;
+static GtkTooltips * tooltips;
+
+
+void wSetBalloonHelp( wBalloonHelp_t * bh )
+{
+ balloonHelpStrings = bh;
+ if (!tooltips)
+ tooltips = gtk_tooltips_new();
+}
+
+void wEnableBalloonHelp( int enable )
+{
+ enableBalloonHelp = enable;
+ if (tooltips) {
+ if (enable)
+ gtk_tooltips_enable( tooltips );
+ else
+ gtk_tooltips_disable( tooltips );
+ }
+}
+
+
+void wControlSetBalloon( wControl_p b, wPos_t dx, wPos_t dy, const char * msg )
+{
+ PangoLayout * layout;
+ wPos_t x, y;
+ wPos_t w, h;
+ wPos_t xx, yy;
+ const char * msgConverted;
+ if (balloonVisible && balloonB == b &&
+ balloonDx == dx && balloonDy == dy && balloonMsg == msg )
+ return;
+
+ if ( msg == NULL ) {
+ if ( balloonF != NULL ) {
+ gtk_widget_hide( balloonF );
+ balloonVisible = FALSE;
+ }
+ balloonMsg = "";
+ return;
+ }
+ msgConverted = gtkConvertInput(msg);
+ if ( balloonF == NULL ) {
+ balloonF = gtk_window_new( GTK_WINDOW_POPUP );
+ gtk_window_set_policy( GTK_WINDOW (balloonF), FALSE, FALSE, TRUE );
+ gtk_widget_realize( balloonF );
+ balloonPI = gtk_label_new(msgConverted);
+ gtk_container_add( GTK_CONTAINER(balloonF), balloonPI );
+ gtk_container_border_width( GTK_CONTAINER(balloonF), 1 );
+ gtk_widget_show( balloonPI );
+ } else {
+ gtk_label_set( GTK_LABEL(balloonPI), msgConverted );
+ }
+ balloonDx = dx;
+ balloonDy = dy;
+ balloonB = b;
+ balloonMsg = msg;
+ gtk_widget_hide( balloonF );
+ layout = gtk_widget_create_pango_layout( balloonPI, msgConverted );
+ pango_layout_get_pixel_size( layout, &w, &h );
+ g_object_unref(G_OBJECT(layout));
+ h = 16;
+ gdk_window_get_position( GTK_WIDGET(b->parent->gtkwin)->window, &x, &y );
+ gdk_window_get_origin( GTK_WIDGET(b->parent->gtkwin)->window, &x, &y );
+ x += b->realX + dx;
+ y += b->realY + b->h - dy;
+ xx = gdk_screen_width();
+ yy = gdk_screen_height();
+ if ( x < 0 ) {
+ x = 0;
+ } else if ( x+w > xx ) {
+ x = xx - w;
+ }
+ if ( y < 0 ) {
+ y = 0;
+ } else if ( y+h > yy ) {
+ y = yy - h ;
+ }
+ gtk_widget_set_usize( balloonPI, w, h );
+ gtk_widget_set_usize( balloonF, w+2, h+2 );
+ gtk_widget_show( balloonF );
+ gtk_widget_set_uposition( balloonF, x, y );
+ /*gtk_widget_popup( balloonF, x, y );*/
+ gdk_draw_rectangle( balloonF->window, balloonF->style->fg_gc[GTK_STATE_NORMAL], FALSE, 0, 0, w+1, h+1 );
+ gtk_widget_queue_resize( GTK_WIDGET(balloonF) );
+ /*gtk_widget_set_uposition( balloonF, x, y );*/
+ balloonVisible = TRUE;
+}
+
+
+void wControlSetBalloonText(
+ wControl_p b,
+ const char * label )
+{
+ const char * helpStr;
+ if ( b->widget == NULL) abort();
+ helpStr = (char*)gtk_object_get_data( GTK_OBJECT(b->widget), HelpDataKey );
+ if ( helpStr == NULL ) helpStr = "NoHelp";
+ if (tooltips)
+ gtk_tooltips_set_tip( tooltips, b->widget, label, helpStr );
+}
+
+
+EXPORT void gtkHelpHideBalloon( void )
+{
+ if (balloonF != NULL && balloonVisible) {
+ gtk_widget_hide( balloonF );
+ balloonVisible = FALSE;
+ }
+}
+
+#ifdef XV_help
+static Notify_value showBalloonHelp( Notify_client client, int which )
+{
+ wControlSetBalloon( balloonHelpB, 0, 0, balloonHelpString );
+ return NOTIFY_DONE;
+}
+#endif
+
+static wWin_p balloonHelp_w;
+static wPos_t balloonHelp_x;
+static wPos_t balloonHelp_y;
+static void prepareBalloonHelp( wWin_p w, wPos_t x, wPos_t y )
+{
+#ifdef XV
+ wControl_p b;
+ char * hs;
+ int appNameLen = strlen( wAppName ) + 1;
+ if (w == NULL)
+ return;
+#ifdef LATER
+ if (!enableBalloonHelp)
+ return;
+#endif
+ if (!balloonHelpStrings)
+ return;
+
+ balloonHelp_w = w;
+ balloonHelp_x = x;
+ balloonHelp_y = y;
+
+ for ( b=w->first; b; b=b->next ) {
+ switch ( b->type ) {
+ case B_BUTTON:
+ case B_CANCEL:
+ case B_TEXT:
+ case B_INTEGER:
+ case B_LIST:
+ case B_DROPLIST:
+ case B_COMBOLIST:
+ case B_RADIO:
+ case B_TOGGLE:
+ case B_DRAW:
+ case B_MULTITEXT:
+ if (x >= b->realX && x < b->realX+b->w &&
+ y >= b->realY && y < b->realY+b->h ) {
+ hs = (char*)gtk_get( b->panel_item, XV_HELP_DATA );
+ if ( hs ) {
+ hs += appNameLen;
+ for ( currBalloonHelp = balloonHelpStrings; currBalloonHelp->name && strcmp(currBalloonHelp->name,hs) != 0; currBalloonHelp++ );
+ if (currBalloonHelp->name && balloonHelpB != b && currBalloonHelp->value ) {
+ balloonHelpB = b;
+ balloonHelpString = currBalloonHelp->value;
+ if (enableBalloonHelp) {
+ wControlSetBalloon( balloonHelpB, 0, 0, balloonHelpString );
+ /*setTimer( balloonHelpTimeOut, showBalloonHelp );*/
+ } else {
+ /*resetBalloonHelp();*/
+ }
+ }
+ return;
+ }
+ }
+ default:
+ ;
+ }
+ }
+ cancelTimer( showBalloonHelp );
+ resetBalloonHelp();
+#endif
+}
+
+
+void wBalloonHelpUpdate( void )
+{
+ balloonHelpB = NULL;
+ balloonMsg = NULL;
+ prepareBalloonHelp( balloonHelp_w, balloonHelp_x, balloonHelp_y );
+}
+
+
+void gtkAddHelpString(
+ GtkWidget * widget,
+ const char * helpStr )
+{
+ int rc;
+ char *string;
+ wBalloonHelp_t * bhp;
+ rc = 0;
+ if (helpStr==NULL || *helpStr==0)
+ return;
+ if ( balloonHelpStrings == NULL )
+ return;
+ for ( bhp = balloonHelpStrings; bhp->name && strcmp(bhp->name,helpStr) != 0; bhp++ );
+ if (listMissingHelpStrings && !bhp->name) {
+ printf( "Missing Help String: %s\n", helpStr );
+ return;
+ }
+ string = malloc( strlen(wAppName) + 5 + strlen(helpStr) + 1 );
+ sprintf( string, "%sHelp/%s", wAppName, helpStr );
+ if (tooltips)
+ gtk_tooltips_set_tip( tooltips, widget, _(bhp->value), string );
+ gtk_object_set_data( GTK_OBJECT( widget ), HelpDataKey, string );
+ if (listHelpStrings)
+ printf( "HELPSTR - %s\n", string );
+}
+
+
+EXPORT const char * wControlGetHelp(
+ wControl_p b ) /* Control */
+/*
+Returns the help topic string associated with <b>.
+*/
+{
+ const char * helpStr;
+ helpStr = (char*)gtk_object_get_data( GTK_OBJECT(b->widget), HelpDataKey );
+ return helpStr;
+}
+
+
+EXPORT void wControlSetHelp(
+ wControl_p b, /* Control */
+ const char * help ) /* topic string */
+/*
+Set the help topic string for <b> to <help>.
+*/
+{
+ const char * helpStr;
+ if (b->widget == 0) abort();
+ helpStr = wControlGetHelp(b);
+ if (tooltips)
+ gtk_tooltips_set_tip( tooltips, b->widget, help, helpStr );
+}
+
+
+/**
+ * create a new horizontal pane and place it into container.
+ * The separator position is read from the resource configuration and set accordingly.
+ * Also a callback is specified that will be executed when the slider has been moved.
+ *
+ * \PARAM container IN the container into which the pane will be stuffed.
+ * \PARAM property IN the name of the property for the slider position
+ *
+ * \return the HPaned handle
+ */
+
+GtkWidget *
+CreateHPaned( GtkBox *container, char *property )
+{
+ GtkWidget *hpaned;
+ long posSlider;
+
+ /* the horizontal slider */
+ hpaned = gtk_hpaned_new ();
+ gtk_container_set_border_width (GTK_CONTAINER (hpaned), 6);
+
+ wPrefGetInteger( HTMLHELPSECTION, SLIDERPREFNAME, &posSlider, SLIDERPOSDEFAULT );
+ gtk_paned_set_position (GTK_PANED (hpaned), (int)posSlider);
+
+ /* pack the horizontal slider into the main window */
+ gtk_box_pack_start( container, hpaned, TRUE, TRUE, 0 );
+ gtk_widget_show( hpaned );
+
+ return( hpaned );
+}
+
+/**
+ * Handler for the delete-event issued on the help window.We are saving window
+ * information (eg. position) and are hiding the window instead of closing it.
+ *
+ * \PARAM win IN the window to be destroyed
+ * \PARAM event IN unused
+ * \PARAM ptr IN unused
+ *
+ * \RETURN FALSE
+ */
+
+static gboolean
+DestroyHelpWindow( GtkWidget *win, GdkEvent *event, void *ptr )
+{
+ int i;
+ GtkWidget *widget;
+ char tmp[ 20 ];
+
+ gint x, y;
+
+ /* get the slider position and save it */
+ widget = lookup_widget( win, PANED );
+ i = gtk_paned_get_position( GTK_PANED( widget ));
+ wPrefSetInteger( HTMLHELPSECTION, SLIDERPREFNAME, i );
+
+ /* get the window position */
+ gtk_window_get_position( (GtkWindow *)win, &x, &y );
+ sprintf( tmp, "%d %d", x, y );
+ wPrefSetString( HTMLHELPSECTION, WINDOWPOSPREFNAME, tmp );
+
+ /* get the window size */
+ gtk_window_get_size( (GtkWindow *)win , &x, &y );
+ sprintf( tmp, "%d %d", x, y );
+ wPrefSetString( HTMLHELPSECTION, WINDOWSIZEPREFNAME, tmp );
+
+ gtk_widget_hide( win );
+ return TRUE;
+}
+
+void back_button_clicked(GtkWidget *widget, gpointer data) {
+ webkit_web_view_go_back(WEBKIT_WEB_VIEW(data));
+}
+
+void forward_button_clicked(GtkWidget *widget, gpointer data) {
+ webkit_web_view_go_forward(WEBKIT_WEB_VIEW(data));
+}
+
+void home_button_clicked(GtkWidget *widget, gpointer data) {
+ load_into_view("index.html", MAIN_VIEW);
+}
+
+/* Toggles the contents pane */
+void contents_button_clicked(GtkWidget *widget, gpointer data) {
+ if (gtk_paned_get_position(GTK_PANED(data)) < 50) {
+ gtk_paned_set_position(GTK_PANED(data), 370);
+ }
+ else {
+ gtk_paned_set_position(GTK_PANED(data), 0);
+ }
+}
+
+gboolean contents_click_handler(
+ WebKitWebView *web_view,
+ WebKitWebFrame *frame,
+ WebKitNetworkRequest *request,
+ WebKitWebNavigationAction *navigation_action,
+ WebKitWebPolicyDecision *policy_decision,
+ gpointer data) {
+
+ webkit_web_view_load_uri(WEBKIT_WEB_VIEW(data), webkit_network_request_get_uri(request));
+
+ return TRUE;
+}
+
+/**
+ * Initialize the buttons for the help window
+ */
+void initialize_buttons (GtkWidget *main_vbox, GtkWidget *content_hpane) {
+ GtkWidget *buttons_hbuttonbox;
+ GtkWidget *back_button;
+ GtkWidget *forward_button;
+ GtkWidget *home_button;
+ GtkWidget *contents_button;
+
+ // define and attach signals to buttons
+ back_button = gtk_button_new_with_label(_("Back"));
+ g_signal_connect(back_button, "clicked", G_CALLBACK(back_button_clicked), G_OBJECT(main_view));
+
+ forward_button = gtk_button_new_with_label(_("Forward"));
+ g_signal_connect(forward_button, "clicked", G_CALLBACK(forward_button_clicked), G_OBJECT(main_view));
+
+ home_button = gtk_button_new_with_label(_("Home"));
+ g_signal_connect(home_button, "clicked", G_CALLBACK(home_button_clicked), G_OBJECT(main_view));
+
+ contents_button = gtk_button_new_with_label(_("Contents"));
+ g_signal_connect(contents_button, "clicked", G_CALLBACK(contents_button_clicked), G_OBJECT(content_hpane));
+
+ // button layout
+ buttons_hbuttonbox = gtk_hbutton_box_new();
+ gtk_container_add(GTK_CONTAINER(buttons_hbuttonbox), back_button);
+ gtk_container_add(GTK_CONTAINER(buttons_hbuttonbox), forward_button);
+ gtk_container_add(GTK_CONTAINER(buttons_hbuttonbox), home_button);
+ gtk_container_add(GTK_CONTAINER(buttons_hbuttonbox), contents_button);
+ gtk_box_pack_start(GTK_BOX(main_vbox), buttons_hbuttonbox, FALSE, TRUE, 0);
+ gtk_box_set_spacing(GTK_BOX(buttons_hbuttonbox), 6);
+ gtk_button_box_set_layout(GTK_BUTTON_BOX(buttons_hbuttonbox), GTK_BUTTONBOX_START);
+
+ /* Store pointers to all widgets, for use by lookup_widget(). */
+ GLADE_HOOKUP_OBJECT (main_view, back_button, BACKBUTTON);
+ GLADE_HOOKUP_OBJECT (main_view, forward_button, FORWARDBUTTON);
+ GLADE_HOOKUP_OBJECT (main_view, home_button, HOMEBUTTON);
+ GLADE_HOOKUP_OBJECT (main_view, contents_button, CONTENTBUTTON);
+}
+
+/**
+ * Create the help windows including all contained widgets and the needed HTML documents.
+ *
+ * \RETURN handle of the created window.
+ */
+
+GtkWidget*
+CreateHelpWindow (void)
+{
+ GtkWidget *main_vbox;
+ GtkWidget *main_view_scroller;
+ GtkWidget *contents_view_scroller;
+ GtkWidget *content_hpane;
+
+ int width;
+ int height;
+ int x, y;
+ int w = 0, h = 0;
+ const char *pref;
+ char title[100];
+
+ wHelpWindow = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+
+ width = gdk_screen_get_width( gtk_window_get_screen( (GtkWindow *)wHelpWindow ));
+ height = gdk_screen_get_height( gtk_window_get_screen( (GtkWindow *)wHelpWindow ));
+
+ pref = wPrefGetString( HTMLHELPSECTION, WINDOWSIZEPREFNAME );
+ if( pref ) {
+ sscanf( pref, "%d %d", &w, &h );
+ if( w > width )
+ w = width;
+ if( h > height )
+ h = height;
+ }
+ else {
+ w = ( width * 2 )/ 5;
+ h = height - 100;
+ }
+
+ pref = wPrefGetString( HTMLHELPSECTION, WINDOWPOSPREFNAME );
+ if( pref ) {
+ sscanf( pref, "%d %d", &x, &y );
+ if( y > height - h )
+ y = height - h;
+
+ if( x > width - w )
+ x = width - w;
+ }
+ else {
+ x = ( width * 3 ) / 5 - 10;
+ y = 70;
+ }
+
+ gtk_window_resize( (GtkWindow *)wHelpWindow, w, h );
+ gtk_window_move( (GtkWindow *)wHelpWindow, x, y );
+
+ gtk_window_set_title (GTK_WINDOW (wHelpWindow), "XTrkCad Help");
+
+ g_signal_connect( G_OBJECT( wHelpWindow ), "delete-event", G_CALLBACK( DestroyHelpWindow ), NULL );
+
+ main_view_scroller = gtk_scrolled_window_new(NULL, NULL);
+ contents_view_scroller = gtk_scrolled_window_new(NULL, NULL);
+ main_view = webkit_web_view_new();
+ contents_view = webkit_web_view_new();
+ // must be done here as it gets locked down later
+ load_into_view ("contents.html", CONTENTS_VIEW);
+ gtk_widget_set_size_request(GTK_WIDGET(wHelpWindow), x, y);
+
+ main_vbox = gtk_vbox_new(FALSE, 5);
+ gtk_container_add(GTK_CONTAINER(wHelpWindow), main_vbox);
+
+ gtk_container_add(GTK_CONTAINER(main_view_scroller), main_view);
+
+ gtk_container_add(GTK_CONTAINER(contents_view_scroller), contents_view);
+
+ content_hpane = gtk_hpaned_new();
+ initialize_buttons(main_vbox, content_hpane);
+ gtk_container_add(GTK_CONTAINER(content_hpane), contents_view_scroller);
+ gtk_container_add(GTK_CONTAINER(content_hpane), main_view_scroller);
+ gtk_box_pack_start(GTK_BOX(main_vbox), content_hpane, TRUE, TRUE, 0);
+
+ gtk_paned_set_position(GTK_PANED(content_hpane), 370);
+
+ g_signal_connect(contents_view, "navigation-policy-decision-requested", G_CALLBACK(contents_click_handler), G_OBJECT(main_view));
+
+ /* Store pointers to all widgets, for use by lookup_widget(). */
+ GLADE_HOOKUP_OBJECT_NO_REF (wHelpWindow, wHelpWindow, "wHelpWindow");
+ GLADE_HOOKUP_OBJECT (wHelpWindow, content_hpane, PANED );
+ GLADE_HOOKUP_OBJECT (wHelpWindow, contents_view, TOCVIEW );
+ GLADE_HOOKUP_OBJECT (wHelpWindow, main_view, CONTENTSVIEW );
+
+ return wHelpWindow;
+}
+
+void load_into_view (char *file, int requested_view) {
+ GtkWidget *view;
+
+ switch (requested_view) {
+ case MAIN_VIEW:
+ view = main_view;
+ break;
+ case CONTENTS_VIEW:
+ view = contents_view;
+ break;
+ default:
+ printf("*** error, could not find view");
+ break;
+ }
+
+ char fileToLoad[100] = "file://";
+ strcat(fileToLoad,directory);
+ strcat(fileToLoad,file);
+
+ //debug printf("*** loading %s into pane %d.\n", fileToLoad, requested_view);
+ webkit_web_view_load_uri(WEBKIT_WEB_VIEW(view), fileToLoad);
+}
+
+/**
+ * Invoke the help system to display help for <topic>.
+ *
+ * \param topic IN topic string
+ */
+
+EXPORT void wHelp( const char * topic )
+{
+ char *htmlFile;
+
+ if( !wHelpWindow )
+ {
+ directory = malloc( BUFSIZ );
+ assert( directory != NULL );
+
+ sprintf( directory, "%s/html/", wGetAppLibDir());
+
+ wHelpWindow = CreateHelpWindow();
+ /* load the default content */
+ load_into_view ("index.html", MAIN_VIEW);
+ }
+
+ /* need space for the 'html' extension plus dot plus \0 */
+ htmlFile = malloc( strlen( topic ) + 6 );
+ assert( htmlFile != NULL );
+
+ sprintf( htmlFile, "%s.html", topic );
+
+ load_into_view (htmlFile, MAIN_VIEW);
+ gtk_widget_show_all(wHelpWindow);
+ gtk_window_present(GTK_WINDOW(wHelpWindow));
+}
+
+/**
+ * Handle the commands issued from the Help drop-down. Currently, we only have a table
+ * of contents, but search etc. might be added in the future.
+ *
+ * \PARAM data IN command value
+ *
+ */
+
+static void
+DoHelpMenu( void *data )
+{
+ int func = (intptr_t)data;
+
+ switch( func )
+ {
+ case 1:
+ wHelp( "index" );
+ break;
+ default:
+ break;
+ }
+
+ return;
+}
+
+/**
+ * Add the entries for Help to the drop-down.
+ *
+ * \PARAM m IN handle of drop-down
+ *
+ */
+
+void wMenuAddHelp( wMenu_p m )
+{
+ wMenuPushCreate( m, NULL, _("&Contents"), 0, DoHelpMenu, (void*)1 );
+}