common.cpp
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上传日期:2022-07-26
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- /*
- * 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 1.6 2008-01-18 04:36:11 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 == ' 14') /* Ctrl+L (form feed) */
- s += "nnnn";
- 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 Distance Limit */
- void setSaneDistanceLimit(AppData* app, int value)
- {
- if (value < 0 || value > 1000000)
- value = 1000000; /* Default to maximum */
- app->renderer->setDistanceLimit(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 Texture Resolution */
- void setSaneTextureResolution(AppData* app, int value)
- {
- if (value < 0 || value > TEXTURE_RESOLUTION)
- value = 1; /* Default to "Medium" */
- app->renderer->setResolution(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);
- }