gtk+修改控件文本字体一例

因为家里电脑是Mac系统，所以就拿Mac系统来示范。

要注意的是gtk+2.0和3.0对字体的处理是有一些区别的：

1.后者使用的是pango的机制，我们这里以gtk+3.0为基础。 2.两者调用Font对话框的方法也不一样，前者用gtk_font_selection_dialog_new来建立对话框，还要设置button_ok按钮的回调函数，比较繁琐；后者用gtk_font_chooser_dialog_new建立对话框，可以直接取得字体名称，比较简洁。这里同样以3.0为基础。

下面上代码：

#include  #include  #define UI_PATH "./entry.ui" #define MAIN_WINDOW "window" #define ENTRY "entry" #define CHK_EDITABLE "chk_editable" #define CHK_VISIBLE "chk_visible" static GtkWidget *w;
static GtkWidget *s_entry;
static GtkWidget *s_dialog_font = NULL; void font_selection_ok(GtkWidget *button,gpointer user_data){
    GtkStyle *style; //GdkFont *font; //gchar *font_name = gtk_font_selection_dialog_get_font_name(GTK_IS_FONT_SELECTION_DIALOG(s_dialog_font)); //printf("%s:font_name is %s\n",__func__,font_name);
    /*
    font = gtk_font_selection_dialog_get_font(GTK_IS_FONT_SELECTION_DIALOG(s_dialog_font)); if(font){
        style = gtk_style_copy(gtk_widget_get_style(s_entry));
        gdk_font_unref(style->font);
        style->font = font;
        gdk_font_ref(style->font);
        gtk_widget_set_style(s_entry,style);
    }
    */
} void font_changed(GtkWidget *self,gpointer user_data){
    s_dialog_font = gtk_font_chooser_dialog_new("Font Selection Dialog :)",GTK_WINDOW(w));
    gtk_window_set_transient_for(GTK_WINDOW(s_dialog_font),GTK_WINDOW(w));
    gtk_window_set_destroy_with_parent(GTK_WINDOW(s_dialog_font),TRUE);
    gtk_font_chooser_set_font(GTK_FONT_CHOOSER(s_dialog_font),NULL); if(gtk_dialog_run(GTK_DIALOG(s_dialog_font)) == GTK_RESPONSE_OK){
        gchar *font_name = gtk_font_chooser_get_font(GTK_FONT_CHOOSER(s_dialog_font));
        printf("%s:font_name is %s\n",__func__,font_name);
        PangoFontDescription *pfd = pango_font_description_from_string(font_name); //gtk_widget_modify_font(s_entry,pfd);
        gtk_widget_override_font(s_entry,pfd);
        pango_font_description_free(pfd);
    }
    gtk_widget_destroy(s_dialog_font);
/* if(!s_dialog_font){
        s_dialog_font = gtk_font_selection_dialog_new("Font Selection Dialog :)");
        g_return_if_fail(GTK_IS_FONT_SELECTION_DIALOG(s_dialog_font)); //gtk_window_position(GTK_WINDOW(s_dialog_font),GTK_WIN_POS_MOUSE);
        gtk_window_set_position(GTK_WINDOW(s_dialog_font),GTK_WIN_POS_MOUSE);
        g_signal_connect(s_dialog_font,"destroy",
            G_CALLBACK(gtk_widget_destroyed),&s_dialog_font);
        g_signal_connect(gtk_font_selection_dialog_get_ok_button(
            GTK_IS_FONT_SELECTION_DIALOG(s_dialog_font)), "clicked",G_CALLBACK(font_selection_ok),NULL);
        g_signal_connect_swapped(gtk_font_selection_dialog_get_cancel_button(
            GTK_IS_FONT_SELECTION_DIALOG(s_dialog_font)), "clicked",G_CALLBACK(gtk_widget_destroy),s_dialog_font);
    } //if(!GTK_WIDGET_VISIBLE(s_dialog_font)) if(!gtk_widget_get_visible(s_dialog_font))
        gtk_widget_show(s_dialog_font); else gtk_widget_destroy(s_dialog_font);
*/
} void editable_toggled(GtkWidget *self,GtkEntry *entry){ //gtk_entry_set_editable(entry,GTK_TOGGLE_BUTTON(self)->active); printf("%s:enter function\n",__func__); gtk_editable_set_editable((GtkEditable*)entry,gtk_toggle_button_get_active(
        GTK_TOGGLE_BUTTON(self)));
} void visible_toggled(GtkWidget *self,GtkEntry *entry){
    //gtk_entry_set_visibility(entry,GTK_TOGGLE_BUTTON(self)->active); printf("%s:enter function\n",__func__); gtk_entry_set_visibility(entry,gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(self)));
} void entry_changed(GtkWidget *self,gpointer user_data){ gchar *text = (gchar*)gtk_entry_get_text(GTK_ENTRY(self)); printf("%s:text is %s\n",__func__,text); text = g_ascii_strup(text,strlen(text)); gtk_entry_set_text(GTK_ENTRY(self),text);
} int main(int argc,char **argv){
    //GtkWidget *w; GError *error = NULL; gtk_init(&argc,&argv); GtkBuilder *builder = gtk_builder_new(); if(!gtk_builder_add_from_file(builder,UI_PATH,&error)){ g_critical("Couldn't load builder file: %s",error->message); g_error_free(error);
    } w = GTK_WIDGET(gtk_builder_get_object(builder,MAIN_WINDOW)); if(!w){ g_critical("Widget \"%s\" is missing in file %s",MAIN_WINDOW,UI_PATH);
    } gtk_window_set_title(GTK_WINDOW(w),"clist todo list"); gtk_window_set_default_size(GTK_WINDOW(w),300,100); gtk_window_set_position(GTK_WINDOW(w),GTK_WIN_POS_CENTER_ALWAYS); gtk_container_set_border_width(GTK_CONTAINER(w),5); s_entry = GTK_WIDGET(gtk_builder_get_object(builder,ENTRY)); gtk_builder_connect_signals(builder,NULL); g_object_unref(builder); gtk_widget_show_all(w); gtk_main(); return 0;
}

entry.ui文件:

version="1.0" encoding="UTF-8"?>
-- Generated with glade 3.18.3 -->"gtk+" version="3.12"/>
  property>
    <property>
    property>
        <property>
        <property>
        <property>property>
            <property>
            <property>
            <property>property>
                <property>
                <property><property>
                <property>property>
                <property>
                <property>
                <property>
                <property>
                <property>
                <property>
                property>
                <property>
                <property>property>
                <property>
                <property>
                <property>
                <property>
                property>
                <property><property>
            <property>
            <property>property>
            <property>
            <property>property>
                <property>
                <property>
                <property>property>
                    <property>
                    <property>
                    <property>
                    <property>
                    <property>
                    <property>
                    property>
                <property>
                <property>property>
                <property>
                <property>
                <property>property>
                    <property>
                    <property>
                    <property>
                    <property>
                    <property>
                    <property>
                    property>
                <property>
                <property><property>
            <property>
            <property>property>
            <property>
            <property>
            <property>property>
                <property>
                <property>
                <property>
                property>
            <property>
            <property>