/* *  Celestia GTK+ Front-End *  Copyright (C) 2005 Pat Suwalski <pat@suwalski.net> * *  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. * *  $Id: common.cpp,v 1.4 2005/12/13 06:19:57 suwalski Exp $ */#include <fstream>#include <gtk/gtk.h>#include <time.h>#include <celengine/astro.h>#include <celengine/galaxy.h>#include <celengine/render.h>#include <celestia/celestiacore.h>#include "common.h"/* Returns the offset of the timezone at date */gint tzOffsetAtDate(astro::Date date){	#ifdef WIN32	/* This does not correctly handle DST. Unfortunately, no way to find	 * out what UTC offset is at specified date in Windows */	return -timezone;	#else	time_t time = (time_t)astro::julianDateToSeconds(date - astro::Date(1970, 1, 1));	struct tm *d = localtime(&time);		return (gint)d->tm_gmtoff;	#endif}/* Updates the time zone in the core based on valid timezone data */void updateTimeZone(AppData* app, gboolean local){	if (local)		/* Always base current time zone on simulation date */		app->core->setTimeZoneBias(tzOffsetAtDate(app->simulation->getTime()));	else		app->core->setTimeZoneBias(0);}/* Creates a button. Used in several dialogs. */gint buttonMake(GtkWidget *hbox, const char *txt, GtkSignalFunc func, gpointer data){	GtkWidget* button = gtk_button_new_with_label(txt);	gtk_box_pack_start(GTK_BOX (hbox), button, TRUE, TRUE, 0);	g_signal_connect(GTK_OBJECT(button), "pressed", func, data);		return 0;}/* creates a group of radioButtons. Used in several dialogs. */void makeRadioItems(const char* const *labels, GtkWidget *box, GtkSignalFunc sigFunc, GtkToggleButton **gads, gpointer data){	GSList *group = NULL;	for (gint i=0; labels[i]; i++)	{		GtkWidget *button = gtk_radio_button_new_with_label(group, labels[i]);		if (gads)			gads[i] = GTK_TOGGLE_BUTTON(button);		group = gtk_radio_button_group(GTK_RADIO_BUTTON(button));		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), (i == 0)?1:0);		gtk_box_pack_start(GTK_BOX(box), button, TRUE, TRUE, 0);		gtk_widget_show (button);		g_signal_connect(GTK_OBJECT(button), "pressed", sigFunc, GINT_TO_POINTER(i));		if (data != NULL)			g_object_set_data(G_OBJECT(button), "data", data);	}}/* Gets the contents of a file and sanitizes formatting */char *readFromFile(const char *fname){	ifstream textFile(fname, ios::in);	string s("");	if (!textFile.is_open())	{		s = "Unable to open file '";		s += fname ;		s += "', probably due to improper installation !\n";	}	char c;	while(textFile.get(c))	{		if (c == '\t')			s += "        ";  /* 8 spaces */		else if (c == '\014')     /* Ctrl+L (form feed) */			s += "\n\n\n\n";		else			s += c;	}	return g_strdup(s.c_str());}/* Returns width of the non-fullscreen window */int getWinWidth(AppData* app){	if (app->fullScreen)		return GPOINTER_TO_INT(g_object_get_data(G_OBJECT(app->mainWindow), "sizeX"));	else		return app->glArea->allocation.width;}/* Returns height of the non-fullscreen window */int getWinHeight(AppData* app){	if (app->fullScreen)		return GPOINTER_TO_INT(g_object_get_data(G_OBJECT(app->mainWindow), "sizeY"));	else		return app->glArea->allocation.height;}/* Returns X-position of the non-fullscreen window */int getWinX(AppData* app){	int positionX;		if (app->fullScreen)		return GPOINTER_TO_INT(g_object_get_data(G_OBJECT(app->mainWindow), "positionX"));	else	{		gtk_window_get_position(GTK_WINDOW(app->mainWindow), &positionX, NULL);		return positionX;	}}/* Returns Y-position of the non-fullscreen window */int getWinY(AppData* app){	int positionY;		if (app->fullScreen)		return GPOINTER_TO_INT(g_object_get_data(G_OBJECT(app->mainWindow), "positionY"));	else	{		gtk_window_get_position(GTK_WINDOW(app->mainWindow), NULL, &positionY);		return positionY;	}}/* Sanitizes and sets Ambient Light */void setSaneAmbientLight(AppData* app, float value){	if (value < 0.0 || value > 1.0)		value = amLevels[1]; /* Default to "Low" */		app->renderer->setAmbientLightLevel(value);}/* Sanitizes and sets Visual Magnitude */void setSaneVisualMagnitude(AppData* app, float value){	if (value < 0.0 || value > 100.0)		value = 8.5f; /* Default from Simulation::Simulation() */		app->simulation->setFaintestVisible(value);}/* Sanitizes and sets Galaxy Light Gain */void setSaneGalaxyLightGain(float value){	if (value < 0.0 || value > 1.0)		value = 0.0f; /* Default */		Galaxy::setLightGain(value);}/* Sanitizes and sets HUD Verbosity */void setSaneVerbosity(AppData* app, int value){	if (value < 0 || value > 2)		value = 1; /* Default to "Terse" */		app->core->setHudDetail(value);}/* Sanitizes and sets Star Style */void setSaneStarStyle(AppData* app, Renderer::StarStyle value){	if (value < Renderer::FuzzyPointStars || value > Renderer::ScaledDiscStars)		value = Renderer::FuzzyPointStars;		app->renderer->setStarStyle(value);}/* Sanitizes and sets Altername Surface Name */void setSaneAltSurface(AppData* app, char* value){	if (value == NULL)		value = (char*)"";		app->simulation->getActiveObserver()->setDisplayedSurface(value);}/* Sanitizes and sets Window Size */void setSaneWinSize(AppData* app, int x, int y){	int screenX = gdk_screen_get_width(gdk_screen_get_default());	int screenY = gdk_screen_get_height(gdk_screen_get_default());		if (x < 320 || x > screenX || y < 240 || y > screenY)	{		x = 640;		y = 480;	}		gtk_widget_set_size_request(app->glArea, x, y);}/* Sanitizes and sets Window Position */void setSaneWinPosition(AppData* app, int x, int y){	int screenX = gdk_screen_get_width(gdk_screen_get_default());	int screenY = gdk_screen_get_height(gdk_screen_get_default());	/* This one is different than the others because we don't have a default */	if (x > 0 && x < screenX && y > 0 && y < screenY)	{		gtk_window_move(GTK_WINDOW(app->mainWindow), x, y);	}}/* Sets default render flags. Exists because the defaults are a little lame. */void setDefaultRenderFlags(AppData* app){	app->renderer->setRenderFlags(Renderer::ShowAtmospheres |	                              Renderer::ShowAutoMag |	                              Renderer::ShowStars |	                              Renderer::ShowPlanets |	                              Renderer::ShowSmoothLines |	                              Renderer::ShowCometTails |	                              Renderer::ShowRingShadows |	                              Renderer::ShowCloudMaps |	                              Renderer::ShowRingShadows |	                              Renderer::ShowEclipseShadows |	                              Renderer::ShowGalaxies |	                              Renderer::ShowNebulae |	                              Renderer::ShowNightMaps);}