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|
/** \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 );
}
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