GTK Modifica colore di sfondo del GtkButton

Question

Cercando di cambiare sfondo/colore di primo piano .... Usando Gtk + e C.

GdkColor color; 
    gdk_color_parse("#0080FF", &color); 
    gtk_widget_modify_fg(GTK_WIDGET(button), GTK_STATE_SELECTED, &color); 
    gtk_widget_modify_fg(GTK_WIDGET(button), GTK_STATE_NORMAL, &color); 

Sto usando sopra la funzionalità, ma non sta dando alcun risultato.

Sto cercando qualcosa ha chiesto a questa domanda (ma in C):
GTK: create a colored regular button

come cambiare stile di Button con il pulsante di stile? Qualcuno può fornire alcuni esempi?

Answer 1

Picture of Red GtkButton http://www.ubuntu-pics.de/bild/30465/screenshot_001_1Jt60q.png

GdkColor color; 

gdk_color_parse ("red", &color); 

gtk_widget_modify_bg (GTK_WIDGET(button), GTK_STATE_NORMAL, &color); 

Si noti che stiamo modificando bg invece di fg.

Answer 2

In GTK3 si farlo utilizzando CSS

come questo:

#include <gtk/gtk.h> 
#include <string.h> 

void btn_clicked(GtkWidget *widget, GtkEntry *entry); 
void myCSS(void); 
void createWind(GtkWidget **window, gint width, gint height); 
void createGrid(GtkWidget **grid, GtkWidget **window, const gchar *name); 

int main(int argc, char *argv[]){ 
    GtkWidget *window, *grid; 
    GtkWidget *button1, *button2, *button3, *button4; 

    gtk_init(&argc, &argv); 
    myCSS(); 

    /*  Create the Window  */ 
    createWind(&window, 390, 290); 

    /*  Create a Grid  */ 
    createGrid(&grid, &window, "myGrid"); 


    /*  Create a red Button */ 
    button1 = gtk_button_new_with_label("Red"); 
    gtk_widget_set_name(button1, "myButton_red"); 
    gtk_widget_set_size_request(button1, 160, 130); 
    g_object_set (button1, "margin", 5, NULL); 

    /*  Create a yellow Button */ 
    button2 = gtk_button_new_with_label("Yellow"); 
    gtk_widget_set_name(button2, "myButton_yellow"); 
    gtk_widget_set_size_request(button2, 160, 130); 
    g_object_set (button2, "margin", 5, NULL); 

    /*  Create a green Button */ 
    button3 = gtk_button_new_with_label("Green"); 
    gtk_widget_set_name(button3, "myButton_green"); 
    gtk_widget_set_size_request(button3, 160, 130); 
    g_object_set (button3, "margin", 5, NULL); 

    /*  Create a blue Button */ 
    button4 = gtk_button_new_with_label("Blue"); 
    gtk_widget_set_name(button4, "myButton_blue"); 
    gtk_widget_set_size_request(button4, 160, 130); 
    g_object_set (button4, "margin", 5, NULL); 


    /*  Putting all together  */ 
    gtk_grid_attach(GTK_GRID(grid), button1, 0, 0, 1, 1); 
    gtk_grid_attach(GTK_GRID(grid), button2, 1, 0, 1, 1); 
    gtk_grid_attach(GTK_GRID(grid), button3, 0, 1, 1, 1); 
    gtk_grid_attach(GTK_GRID(grid), button4, 1, 1, 1, 1); 



    gtk_widget_show_all(window); 
    gtk_main(); 
    return 0; 
} 

void myCSS(void){ 
    GtkCssProvider *provider; 
    GdkDisplay *display; 
    GdkScreen *screen; 

    provider = gtk_css_provider_new(); 
    display = gdk_display_get_default(); 
    screen = gdk_display_get_default_screen (display); 
    gtk_style_context_add_provider_for_screen (screen, GTK_STYLE_PROVIDER (provider), GTK_STYLE_PROVIDER_PRIORITY_APPLICATION); 

    const gchar *myCssFile = "mystyle.css"; 
    GError *error = 0; 

    gtk_css_provider_load_from_file(provider, g_file_new_for_path(myCssFile), &error); 
    g_object_unref (provider); 
} 

void createWind(GtkWidget **window, gint width, gint height){ 
    *window = gtk_window_new(GTK_WINDOW_TOPLEVEL); 
    gtk_window_set_title(GTK_WINDOW(*window), "MyApp"); 
    gtk_window_set_default_size(GTK_WINDOW(*window), width, height); 
    gtk_window_set_resizable (GTK_WINDOW(*window), TRUE); 
    gtk_container_set_border_width(GTK_CONTAINER(*window), 5); 
    g_signal_connect(*window, "destroy", G_CALLBACK(gtk_main_quit), NULL); 
} 

void createGrid(GtkWidget **grid, GtkWidget **window, const gchar *name){ 
    *grid = gtk_grid_new(); 
    gtk_grid_set_row_homogeneous(GTK_GRID(*grid), FALSE); 
    gtk_grid_set_column_homogeneous(GTK_GRID(*grid), FALSE); 
    gtk_container_set_border_width(GTK_CONTAINER (*grid), 15); 
    gtk_grid_set_column_spacing(GTK_GRID(*grid), 5); 
    gtk_grid_set_row_spacing(GTK_GRID(*grid), 5); 
    gtk_widget_set_name(*grid, name); 
    g_object_set (*grid, "margin", 22, NULL); 
    gtk_container_add (GTK_CONTAINER (*window), *grid); 
} 

void btn_clicked(GtkWidget *widget, GtkEntry *entry){ 
    (void)widget; 
    const gchar *gstrTexto; 

    gstrTexto = gtk_entry_get_text(entry); 
    g_print("%s\n", gstrTexto); 
    gtk_editable_select_region(GTK_EDITABLE(entry) , 0, 3); 
} 

miostile.css:

GtkWindow { 
    background-color: magenta; 
} 

GtkButton { 
    background-image: none; 
} 

#myGrid { 
    background-color: cyan; 
    border-style: solid; 
    border-color: black; 
    border-width: 1px; 
} 

#myChildTop { 
    background-color: white; 
} 

#myButton_red{ 
    background-color: red; 
    color: white; 
    font-family: DejaVu Sans; 
    font-style: normal; 
    font-weight: bold; 
    font-size: 20px; 
    border-radius: 15px; 
} 

#myButton_yellow{ 
    background-color: yellow; 
    color: white; 
    font-family: DejaVu Sans; 
    font-style: normal; 
    font-weight: bold; 
    font-size: 20px; 
    border-radius: 15px; 
} 

#myButton_green{ 
    background-color: green; 
    color: white; 
    font-family: DejaVu Sans; 
    font-style: normal; 
    font-weight: bold; 
    font-size: 20px; 
    border-radius: 15px; 
} 

#myButton_blue{ 
    background-color: blue; 
    color: white; 
    font-family: DejaVu Sans; 
    font-style: normal; 
    font-weight: bold; 
    font-size: 20px; 
    border-radius: 15px; 
} 

#myButton_red:hover, 
#myButton_yellow:hover, 
#myButton_green:hover, 
#myButton_blue:hover{ 
    background-color: black; 
} 

Se ci si concentra il nostro mouse su un pulsante, il pulsante diventerà nero: