/* Foreign drawing * * Many applications can't use GTK+ widgets, for a variety of reasons, * but still want their user interface to appear integrated with the * rest of the desktop, and follow GTK+ themes. This demo shows how to * use GtkStyleContext and the gtk_render_ APIs to achieve this. * * Note that this is a very simple, non-interactive example. */ #include #include static void append_element (GtkWidgetPath *path, const char *selector) { static const struct { const char *name; GtkStateFlags state_flag; } pseudo_classes[] = { { "active", GTK_STATE_FLAG_ACTIVE }, { "hover", GTK_STATE_FLAG_PRELIGHT }, { "selected", GTK_STATE_FLAG_SELECTED }, { "disabled", GTK_STATE_FLAG_INSENSITIVE }, { "indeterminate", GTK_STATE_FLAG_INCONSISTENT }, { "focus", GTK_STATE_FLAG_FOCUSED }, { "backdrop", GTK_STATE_FLAG_BACKDROP }, { "dir(ltr)", GTK_STATE_FLAG_DIR_LTR }, { "dir(rtl)", GTK_STATE_FLAG_DIR_RTL }, { "link", GTK_STATE_FLAG_LINK }, { "visited", GTK_STATE_FLAG_VISITED }, { "checked", GTK_STATE_FLAG_CHECKED }, { "drop(active)", GTK_STATE_FLAG_DROP_ACTIVE } }; const char *next; char *name; char type; guint i; next = strpbrk (selector, "#.:"); if (next == NULL) next = selector + strlen (selector); name = g_strndup (selector, next - selector); if (g_ascii_isupper (selector[0])) { GType gtype; gtype = g_type_from_name (name); if (gtype == G_TYPE_INVALID) { g_critical ("Unknown type name `%s'", name); g_free (name); return; } gtk_widget_path_append_type (path, gtype); } else { /* Omit type, we're using name */ gtk_widget_path_append_type (path, G_TYPE_NONE); gtk_widget_path_iter_set_object_name (path, -1, name); } g_free (name); while (*next != '\0') { type = *next; selector = next + 1; next = strpbrk (selector, "#.:"); if (next == NULL) next = selector + strlen (selector); name = g_strndup (selector, next - selector); switch (type) { case '#': gtk_widget_path_iter_set_name (path, -1, name); break; case '.': gtk_widget_path_iter_add_class (path, -1, name); break; case ':': for (i = 0; i < G_N_ELEMENTS (pseudo_classes); i++) { if (g_str_equal (pseudo_classes[i].name, name)) { gtk_widget_path_iter_set_state (path, -1, gtk_widget_path_iter_get_state (path, -1) | pseudo_classes[i].state_flag); break; } } if (i == G_N_ELEMENTS (pseudo_classes)) g_critical ("Unknown pseudo-class :%s", name); break; default: g_assert_not_reached (); break; } g_free (name); } } static GtkStyleContext * create_context_for_path (GtkWidgetPath *path, GtkStyleContext *parent) { GtkStyleContext *context; context = gtk_style_context_new (); gtk_style_context_set_path (context, path); gtk_style_context_set_parent (context, parent); /* Unfortunately, we have to explicitly set the state again here * for it to take effect */ gtk_style_context_set_state (context, gtk_widget_path_iter_get_state (path, -1)); gtk_widget_path_unref (path); return context; } static GtkStyleContext * get_style (GtkStyleContext *parent, const char *selector) { GtkWidgetPath *path; if (parent) path = gtk_widget_path_copy (gtk_style_context_get_path (parent)); else path = gtk_widget_path_new (); append_element (path, selector); return create_context_for_path (path, parent); } static GtkStyleContext * get_style_with_siblings (GtkStyleContext *parent, const char *selector, const char **siblings, gint position) { GtkWidgetPath *path, *siblings_path; guint i; if (parent) path = gtk_widget_path_copy (gtk_style_context_get_path (parent)); else path = gtk_widget_path_new (); siblings_path = gtk_widget_path_new (); for (i = 0; siblings[i]; i++) append_element (siblings_path, siblings[i]); gtk_widget_path_append_with_siblings (path, siblings_path, position); gtk_widget_path_unref (siblings_path); return create_context_for_path (path, parent); } static void draw_style_common (GtkStyleContext *context, cairo_t *cr, gint x, gint y, gint width, gint height, gint *contents_x, gint *contents_y, gint *contents_width, gint *contents_height) { GtkBorder margin, border, padding; int min_width, min_height; gtk_style_context_get_margin (context, &margin); gtk_style_context_get_border (context, &border); gtk_style_context_get_padding (context, &padding); gtk_style_context_get (context, "min-width", &min_width, "min-height", &min_height, NULL); x += margin.left; y += margin.top; width -= margin.left + margin.right; height -= margin.top + margin.bottom; width = MAX (width, min_width); height = MAX (height, min_height); gtk_render_background (context, cr, x, y, width, height); gtk_render_frame (context, cr, x, y, width, height); if (contents_x) *contents_x = x + border.left + padding.left; if (contents_y) *contents_y = y + border.top + padding.top; if (contents_width) *contents_width = width - border.left - border.right - padding.left - padding.right; if (contents_height) *contents_height = height - border.top - border.bottom - padding.top - padding.bottom; } static void query_size (GtkStyleContext *context, gint *width, gint *height) { GtkBorder margin, border, padding; int min_width, min_height; gtk_style_context_get_margin (context, &margin); gtk_style_context_get_border (context, &border); gtk_style_context_get_padding (context, &padding); gtk_style_context_get (context, "min-width", &min_width, "min-height", &min_height, NULL); min_width += margin.left + margin.right + border.left + border.right + padding.left + padding.right; min_height += margin.top + margin.bottom + border.top + border.bottom + padding.top + padding.bottom; if (width) *width = MAX (*width, min_width); if (height) *height = MAX (*height, min_height); } static void draw_menu (GtkWidget *widget, cairo_t *cr, gint x, gint y, gint width, gint *height) { GtkStyleContext *menu_context; GtkStyleContext *menuitem_context; GtkStyleContext *hovermenuitem_context; GtkStyleContext *hoveredarrowmenuitem_context; GtkStyleContext *arrowmenuitem_context; GtkStyleContext *checkmenuitem_context; GtkStyleContext *disabledarrowmenuitem_context; GtkStyleContext *disabledcheckmenuitem_context; GtkStyleContext *radiomenuitem_context; GtkStyleContext *disablemenuitem_context; GtkStyleContext *disabledradiomenuitem_context; GtkStyleContext *separatormenuitem_context; gint menuitem1_height, menuitem2_height, menuitem3_height, menuitem4_height, menuitem5_height; gint contents_x, contents_y, contents_width, contents_height; gint menu_x, menu_y, menu_width, menu_height; gint arrow_width, arrow_height, arrow_size; gint toggle_x, toggle_y, toggle_width, toggle_height; /* This information is taken from the GtkMenu docs, see "CSS nodes" */ menu_context = get_style (gtk_widget_get_style_context(widget), "menu"); hovermenuitem_context = get_style (menu_context, "menuitem:hover"); hoveredarrowmenuitem_context = get_style (hovermenuitem_context, "arrow.right:dir(ltr)"); menuitem_context = get_style (menu_context, "menuitem"); arrowmenuitem_context = get_style (menuitem_context, "arrow:dir(rtl)"); disablemenuitem_context = get_style (menu_context, "menuitem:disabled"); disabledarrowmenuitem_context = get_style (disablemenuitem_context, "arrow:dir(rtl)"); checkmenuitem_context = get_style (menuitem_context, "check:checked"); disabledcheckmenuitem_context = get_style (disablemenuitem_context, "check"); separatormenuitem_context = get_style (menu_context, "separator:disabled"); radiomenuitem_context = get_style (menuitem_context, "radio:checked"); disabledradiomenuitem_context = get_style (disablemenuitem_context, "radio"); *height = 0; query_size (menu_context, NULL, height); menuitem1_height = 0; query_size (hovermenuitem_context, NULL, &menuitem1_height); query_size (hoveredarrowmenuitem_context, NULL, &menuitem1_height); *height += menuitem1_height; menuitem2_height = 0; query_size (menu_context, NULL, &menuitem5_height); query_size (menuitem_context, NULL, &menuitem2_height); query_size (arrowmenuitem_context, NULL, &menuitem2_height); query_size (disabledarrowmenuitem_context, NULL, &menuitem2_height); *height += menuitem2_height; menuitem3_height = 0; query_size (menu_context, NULL, &menuitem5_height); query_size (menuitem_context, NULL, &menuitem3_height); query_size (checkmenuitem_context, NULL, &menuitem3_height); query_size (disabledcheckmenuitem_context, NULL, &menuitem3_height); *height += menuitem3_height; menuitem4_height = 0; query_size (menu_context, NULL, &menuitem5_height); query_size (separatormenuitem_context, NULL, &menuitem4_height); *height += menuitem4_height; menuitem5_height = 0; query_size (menu_context, NULL, &menuitem5_height); query_size (menuitem_context, NULL, &menuitem5_height); query_size (radiomenuitem_context, NULL, &menuitem5_height); query_size (disabledradiomenuitem_context, NULL, &menuitem5_height); *height += menuitem5_height; draw_style_common (menu_context, cr, x, y, width, *height, &menu_x, &menu_y, &menu_width, &menu_height); /* Hovered with right arrow */ gtk_style_context_get (hoveredarrowmenuitem_context, "min-width", &arrow_width, "min-height", &arrow_height, NULL); arrow_size = MIN (arrow_width, arrow_height); draw_style_common (hovermenuitem_context, cr, menu_x, menu_y, menu_width, menuitem1_height, &contents_x, &contents_y, &contents_width, &contents_height); gtk_render_arrow (hoveredarrowmenuitem_context, cr, G_PI / 2, contents_x + contents_width - arrow_size, contents_y + (contents_height - arrow_size) / 2, arrow_size); /* Left arrow sensitive, and right arrow insensitive */ draw_style_common (menuitem_context, cr, menu_x, menu_y + menuitem1_height, menu_width, menuitem2_height, &contents_x, &contents_y, &contents_width, &contents_height); gtk_style_context_get (arrowmenuitem_context, "min-width", &arrow_width, "min-height", &arrow_height, NULL); arrow_size = MIN (arrow_width, arrow_height); gtk_render_arrow (arrowmenuitem_context, cr, G_PI / 2, contents_x, contents_y + (contents_height - arrow_size) / 2, arrow_size); gtk_style_context_get (disabledarrowmenuitem_context, "min-width", &arrow_width, "min-height", &arrow_height, NULL); arrow_size = MIN (arrow_width, arrow_height); gtk_render_arrow (disabledarrowmenuitem_context, cr, G_PI / 2, contents_x + contents_width - arrow_size, contents_y + (contents_height - arrow_size) / 2, arrow_size); /* Left check enabled, sensitive, and right check unchecked, insensitive */ draw_style_common (menuitem_context, cr, menu_x, menu_y + menuitem1_height + menuitem2_height, menu_width, menuitem3_height, &contents_x, &contents_y, &contents_width, &contents_height); gtk_style_context_get (checkmenuitem_context, "min-width", &toggle_width, "min-height", &toggle_height, NULL); draw_style_common (checkmenuitem_context, cr, contents_x, contents_y, toggle_width, toggle_height, &toggle_x, &toggle_y, &toggle_width, &toggle_height); gtk_render_check (checkmenuitem_context, cr, toggle_x, toggle_y, toggle_width, toggle_height); gtk_style_context_get (disabledcheckmenuitem_context, "min-width", &toggle_width, "min-height", &toggle_height, NULL); draw_style_common (disabledcheckmenuitem_context, cr, contents_x + contents_width - toggle_width, contents_y, toggle_width, toggle_height, &toggle_x, &toggle_y, &toggle_width, &toggle_height); gtk_render_check (disabledcheckmenuitem_context, cr, toggle_x, toggle_y, toggle_width, toggle_height); /* Separator */ draw_style_common (separatormenuitem_context, cr, menu_x, menu_y + menuitem1_height + menuitem2_height + menuitem3_height, menu_width, menuitem4_height, NULL, NULL, NULL, NULL); /* Left check enabled, sensitive, and right check unchecked, insensitive */ draw_style_common (menuitem_context, cr, menu_x, menu_y + menuitem1_height + menuitem2_height + menuitem3_height + menuitem4_height, menu_width, menuitem5_height, &contents_x, &contents_y, &contents_width, &contents_height); gtk_style_context_get (radiomenuitem_context, "min-width", &toggle_width, "min-height", &toggle_height, NULL); draw_style_common (radiomenuitem_context, cr, contents_x, contents_y, toggle_width, toggle_height, &toggle_x, &toggle_y, &toggle_width, &toggle_height); gtk_render_check (radiomenuitem_context, cr, toggle_x, toggle_y, toggle_width, toggle_height); gtk_style_context_get (disabledradiomenuitem_context, "min-width", &toggle_width, "min-height", &toggle_height, NULL); draw_style_common (disabledradiomenuitem_context, cr, contents_x + contents_width - toggle_width, contents_y, toggle_width, toggle_height, &toggle_x, &toggle_y, &toggle_width, &toggle_height); gtk_render_check (disabledradiomenuitem_context, cr, toggle_x, toggle_y, toggle_width, toggle_height); g_object_unref (menu_context); g_object_unref (menuitem_context); g_object_unref (hovermenuitem_context); g_object_unref (hoveredarrowmenuitem_context); g_object_unref (arrowmenuitem_context); g_object_unref (checkmenuitem_context); g_object_unref (disabledarrowmenuitem_context); g_object_unref (disabledcheckmenuitem_context); g_object_unref (radiomenuitem_context); g_object_unref (disablemenuitem_context); g_object_unref (disabledradiomenuitem_context); g_object_unref (separatormenuitem_context); } static void draw_menubar (GtkWidget *widget, cairo_t *cr, gint x, gint y, gint width, gint *height) { GtkStyleContext *frame_context; GtkStyleContext *border_context; GtkStyleContext *menubar_context; GtkStyleContext *hovered_menuitem_context; GtkStyleContext *menuitem_context; gint contents_x, contents_y, contents_width, contents_height; gint item_width; /* Menubar background is the same color as our base background, so use a frame */ frame_context = get_style (NULL, "frame"); border_context = get_style (frame_context, "border"); /* This information is taken from the GtkMenuBar docs, see "CSS nodes" */ menubar_context = get_style (NULL, "menubar"); hovered_menuitem_context = get_style (menubar_context, "menuitem:hover"); menuitem_context = get_style (menubar_context, "menuitem"); *height = 0; query_size (frame_context, NULL, height); query_size (border_context, NULL, height); query_size (menubar_context, NULL, height); query_size (hovered_menuitem_context, NULL, height); query_size (menuitem_context, NULL, height); draw_style_common (frame_context, cr, x, y, width, *height, NULL, NULL, NULL, NULL); draw_style_common (border_context, cr, x, y, width, *height, &contents_x, &contents_y, &contents_width, &contents_height); draw_style_common (menubar_context, cr, contents_x, contents_y, contents_width, contents_height, NULL, NULL, NULL, NULL); item_width = contents_width / 3; draw_style_common (hovered_menuitem_context, cr, contents_x, contents_y, item_width, contents_height, NULL, NULL, NULL, NULL); draw_style_common (menuitem_context, cr, contents_x + item_width * 2, contents_y, item_width, contents_height, NULL, NULL, NULL, NULL); g_object_unref (menuitem_context); g_object_unref (hovered_menuitem_context); g_object_unref (menubar_context); g_object_unref (border_context); g_object_unref (frame_context); } static void draw_notebook (GtkWidget *widget, cairo_t *cr, gint x, gint y, gint width, gint height) { GtkStyleContext *notebook_context; GtkStyleContext *header_context; GtkStyleContext *tabs_context; GtkStyleContext *tab1_context, *tab2_context; GtkStyleContext *stack_context; gint header_height; gint contents_x, contents_y, contents_width, contents_height; /* This information is taken from the GtkNotebook docs, see "CSS nodes" */ notebook_context = get_style (NULL, "notebook.frame"); header_context = get_style (notebook_context, "header.top"); tabs_context = get_style (header_context, "tabs"); tab1_context = get_style (tabs_context, "tab:checked"); tab2_context = get_style (tabs_context, "tab:hover"); stack_context = get_style (notebook_context, "stack"); header_height = 0; query_size (notebook_context, NULL, &header_height); query_size (header_context, NULL, &header_height); query_size (tabs_context, NULL, &header_height); query_size (tab1_context, NULL, &header_height); query_size (tab2_context, NULL, &header_height); draw_style_common (notebook_context, cr, x, y, width, height, NULL, NULL, NULL, NULL); draw_style_common (header_context, cr, x, y, width, header_height, NULL, NULL, NULL, NULL); draw_style_common (tabs_context, cr, x, y, width, header_height, NULL, NULL, NULL, NULL); draw_style_common (tab1_context, cr, x, y, width / 2, header_height, &contents_x, &contents_y, &contents_width, &contents_height); draw_style_common (tab2_context, cr, x + width / 2, y, width / 2, header_height, NULL, NULL, NULL, NULL); draw_style_common (stack_context, cr, x, y + header_height, width,height - header_height, NULL, NULL, NULL, NULL); g_object_unref (stack_context); g_object_unref (tabs_context); g_object_unref (tab1_context); g_object_unref (tab2_context); g_object_unref (header_context); g_object_unref (notebook_context); } static void draw_horizontal_scrollbar (GtkWidget *widget, cairo_t *cr, gint x, gint y, gint width, gint position, GtkStateFlags state, gint *height) { GtkStyleContext *scrollbar_context; GtkStyleContext *contents_context; GtkStyleContext *trough_context; GtkStyleContext *slider_context; gint slider_width; /* This information is taken from the GtkScrollbar docs, see "CSS nodes" */ scrollbar_context = get_style (NULL, "scrollbar.horizontal.bottom"); contents_context = get_style (scrollbar_context, "contents"); trough_context = get_style (contents_context, "trough"); slider_context = get_style (trough_context, "slider"); gtk_style_context_set_state (scrollbar_context, state); gtk_style_context_set_state (contents_context, state); gtk_style_context_set_state (trough_context, state); gtk_style_context_set_state (slider_context, state); *height = 0; query_size (scrollbar_context, NULL, height); query_size (contents_context, NULL, height); query_size (trough_context, NULL, height); query_size (slider_context, NULL, height); gtk_style_context_get (slider_context, "min-width", &slider_width, NULL); draw_style_common (scrollbar_context, cr, x, y, width, *height, NULL, NULL, NULL, NULL); draw_style_common (contents_context, cr, x, y, width, *height, NULL, NULL, NULL, NULL); draw_style_common (trough_context, cr, x, y, width, *height, NULL, NULL, NULL, NULL); draw_style_common (slider_context, cr, x + position, y, slider_width, *height, NULL, NULL, NULL, NULL); g_object_unref (slider_context); g_object_unref (trough_context); g_object_unref (contents_context); g_object_unref (scrollbar_context); } static void draw_text (GtkWidget *widget, cairo_t *cr, gint x, gint y, gint width, gint height, const gchar *text, GtkStateFlags state) { GtkStyleContext *label_context; GtkStyleContext *selection_context; GtkStyleContext *context; PangoLayout *layout; /* This information is taken from the GtkLabel docs, see "CSS nodes" */ label_context = get_style (NULL, "label.view"); selection_context = get_style (label_context, "selection"); gtk_style_context_set_state (label_context, state); if (state & GTK_STATE_FLAG_SELECTED) context = selection_context; else context = label_context; layout = gtk_widget_create_pango_layout (widget, text); gtk_render_background (context, cr, x, y, width, height); gtk_render_frame (context, cr, x, y, width, height); gtk_render_layout (context, cr, x, y, layout); g_object_unref (layout); g_object_unref (selection_context); g_object_unref (label_context); } static void draw_check (GtkWidget *widget, cairo_t *cr, gint x, gint y, GtkStateFlags state, gint *width, gint *height) { GtkStyleContext *button_context; GtkStyleContext *check_context; gint contents_x, contents_y, contents_width, contents_height; /* This information is taken from the GtkCheckButton docs, see "CSS nodes" */ button_context = get_style (NULL, "checkbutton"); check_context = get_style (button_context, "check"); gtk_style_context_set_state (check_context, state); *width = *height = 0; query_size (button_context, width, height); query_size (check_context, width, height); draw_style_common (button_context, cr, x, y, *width, *height, NULL, NULL, NULL, NULL); draw_style_common (check_context, cr, x, y, *width, *height, &contents_x, &contents_y, &contents_width, &contents_height); gtk_render_check (check_context, cr, contents_x, contents_y, contents_width, contents_height); g_object_unref (check_context); g_object_unref (button_context); } static void draw_radio (GtkWidget *widget, cairo_t *cr, gint x, gint y, GtkStateFlags state, gint *width, gint *height) { GtkStyleContext *button_context; GtkStyleContext *check_context; gint contents_x, contents_y, contents_width, contents_height; /* This information is taken from the GtkRadioButton docs, see "CSS nodes" */ button_context = get_style (NULL, "radiobutton"); check_context = get_style (button_context, "radio"); gtk_style_context_set_state (check_context, state); *width = *height = 0; query_size (button_context, width, height); query_size (check_context, width, height); draw_style_common (button_context, cr, x, y, *width, *height, NULL, NULL, NULL, NULL); draw_style_common (check_context, cr, x, y, *width, *height, &contents_x, &contents_y, &contents_width, &contents_height); gtk_render_check (check_context, cr, contents_x, contents_y, contents_width, contents_height); g_object_unref (check_context); g_object_unref (button_context); } static void draw_progress (GtkWidget *widget, cairo_t *cr, gint x, gint y, gint width, gint position, gint *height) { GtkStyleContext *bar_context; GtkStyleContext *trough_context; GtkStyleContext *progress_context; /* This information is taken from the GtkProgressBar docs, see "CSS nodes" */ bar_context = get_style (NULL, "progressbar.horizontal"); trough_context = get_style (bar_context, "trough"); progress_context = get_style (trough_context, "progress.left"); *height = 0; query_size (bar_context, NULL, height); query_size (trough_context, NULL, height); query_size (progress_context, NULL, height); draw_style_common (bar_context, cr, x, y, width, *height, NULL, NULL, NULL, NULL); draw_style_common (trough_context, cr, x, y, width, *height, NULL, NULL, NULL, NULL); draw_style_common (progress_context, cr, x, y, position, *height, NULL, NULL, NULL, NULL); g_object_unref (progress_context); g_object_unref (trough_context); g_object_unref (bar_context); } static void draw_scale (GtkWidget *widget, cairo_t *cr, gint x, gint y, gint width, gint position, gint *height) { GtkStyleContext *scale_context; GtkStyleContext *contents_context; GtkStyleContext *trough_context; GtkStyleContext *slider_context; GtkStyleContext *highlight_context; gint contents_x, contents_y, contents_width, contents_height; gint trough_height, slider_height; scale_context = get_style (NULL, "scale.horizontal"); contents_context = get_style (scale_context, "contents"); trough_context = get_style (contents_context, "trough"); slider_context = get_style (trough_context, "slider"); highlight_context = get_style (trough_context, "highlight.top"); *height = 0; query_size (scale_context, NULL, height); query_size (contents_context, NULL, height); query_size (trough_context, NULL, height); query_size (slider_context, NULL, height); query_size (highlight_context, NULL, height); draw_style_common (scale_context, cr, x, y, width, *height, &contents_x, &contents_y, &contents_width, &contents_height); draw_style_common (contents_context, cr, contents_x, contents_y, contents_width, contents_height, &contents_x, &contents_y, &contents_width, &contents_height); /* Scale trough defines its size querying slider and highlight */ trough_height = 0; query_size (trough_context, NULL, &trough_height); slider_height = 0; query_size (slider_context, NULL, &slider_height); query_size (highlight_context, NULL, &slider_height); trough_height += slider_height; draw_style_common (trough_context, cr, contents_x, contents_y, contents_width, trough_height, &contents_x, &contents_y, &contents_width, &contents_height); draw_style_common (highlight_context, cr, contents_x, contents_y, contents_width / 2, contents_height, NULL, NULL, NULL, NULL); draw_style_common (slider_context, cr, contents_x + position, contents_y, contents_height, contents_height, NULL, NULL, NULL, NULL); g_object_unref (scale_context); g_object_unref (contents_context); g_object_unref (trough_context); g_object_unref (slider_context); g_object_unref (highlight_context); } static void draw_combobox (GtkWidget *widget, cairo_t *cr, gint x, gint y, gint width, gboolean has_entry, gint *height) { GtkStyleContext *combo_context; GtkStyleContext *box_context; GtkStyleContext *button_context; GtkStyleContext *button_box_context; GtkStyleContext *entry_context; GtkStyleContext *arrow_context; gint contents_x, contents_y, contents_width, contents_height; gint button_width; gint arrow_width, arrow_height, arrow_size; /* This information is taken from the GtkComboBox docs, see "CSS nodes" */ combo_context = get_style (NULL, "combobox:focus"); box_context = get_style (combo_context, "box.horizontal.linked"); if (has_entry) { const char *siblings[3] = { "entry.combo:focus", "button.combo" , NULL }; entry_context = get_style_with_siblings (box_context, "entry.combo:focus", siblings, 0); button_context = get_style_with_siblings (box_context, "button.combo", siblings, 1); } else { const char *siblings[2] = { "button.combo" , NULL }; button_context = get_style_with_siblings (box_context, "button.combo", siblings, 0); } button_box_context = get_style (button_context, "box.horizontal"); arrow_context = get_style (button_box_context, "arrow"); *height = 0; query_size (combo_context, NULL, height); query_size (box_context, NULL, height); if (has_entry) query_size (entry_context, NULL, height); query_size (button_context, NULL, height); query_size (button_box_context, NULL, height); query_size (arrow_context, NULL, height); gtk_style_context_get (arrow_context, "min-width", &arrow_width, "min-height", &arrow_height, NULL); arrow_size = MIN (arrow_width, arrow_height); draw_style_common (combo_context, cr, x, y, width, *height, NULL, NULL, NULL, NULL); draw_style_common (box_context, cr, x, y, width, *height, NULL, NULL, NULL, NULL); if (has_entry) { button_width = *height; draw_style_common (entry_context, cr, x, y, width - button_width, *height, NULL, NULL, NULL, NULL); draw_style_common (button_context, cr, x + width - button_width, y, button_width, *height, &contents_x, &contents_y, &contents_width, &contents_height); } else { button_width = width; draw_style_common (button_context, cr, x, y, width, *height, &contents_x, &contents_y, &contents_width, &contents_height); } draw_style_common (button_box_context, cr, contents_x, contents_y, contents_width, contents_height, NULL, NULL, NULL, NULL); draw_style_common (arrow_context, cr, contents_x, contents_y, contents_width, contents_height, NULL, NULL, NULL, NULL); gtk_render_arrow (arrow_context, cr, G_PI / 2, contents_x + contents_width - arrow_size, contents_y + (contents_height - arrow_size) / 2, arrow_size); g_object_unref (arrow_context); if (has_entry) g_object_unref (entry_context); g_object_unref (button_context); g_object_unref (combo_context); } static void draw_spinbutton (GtkWidget *widget, cairo_t *cr, gint x, gint y, gint width, gint *height) { GtkStyleContext *spin_context; GtkStyleContext *entry_context; GtkStyleContext *up_context; GtkStyleContext *down_context; GtkIconTheme *icon_theme; GtkIconInfo *icon_info; GdkPixbuf *pixbuf; gint icon_width, icon_height, icon_size; gint button_width; gint contents_x, contents_y, contents_width, contents_height; /* This information is taken from the GtkSpinButton docs, see "CSS nodes" */ spin_context = get_style (NULL, "spinbutton.horizontal:focus"); entry_context = get_style (NULL, "entry:focus"); up_context = get_style (spin_context, "button.up:focus:active"); down_context = get_style (spin_context, "button.down:focus"); *height = 0; query_size (spin_context, NULL, height); query_size (entry_context, NULL, height); query_size (up_context, NULL, height); query_size (down_context, NULL, height); button_width = *height; draw_style_common (spin_context, cr, x, y, width, *height, NULL, NULL, NULL, NULL); draw_style_common (entry_context, cr, x, y, width, *height, NULL, NULL, NULL, NULL); icon_theme = gtk_icon_theme_get_for_screen (gtk_widget_get_screen (widget)); gtk_style_context_get (up_context, "min-width", &icon_width, "min-height", &icon_height, NULL); icon_size = MIN (icon_width, icon_height); icon_info = gtk_icon_theme_lookup_icon (icon_theme, "list-add-symbolic", icon_size, 0); pixbuf = gtk_icon_info_load_symbolic_for_context (icon_info, up_context, NULL, NULL); g_object_unref (icon_info); draw_style_common (up_context, cr, x + width - button_width, y, button_width, *height, &contents_x, &contents_y, &contents_width, &contents_height); gtk_render_icon (up_context, cr, pixbuf, contents_x, contents_y + (contents_height - icon_size) / 2); g_object_unref (pixbuf); gtk_style_context_get (down_context, "min-width", &icon_width, "min-height", &icon_height, NULL); icon_size = MIN (icon_width, icon_height); icon_info = gtk_icon_theme_lookup_icon (icon_theme, "list-remove-symbolic", icon_size, 0); pixbuf = gtk_icon_info_load_symbolic_for_context (icon_info, down_context, NULL, NULL); g_object_unref (icon_info); draw_style_common (down_context, cr, x + width - 2 * button_width, y, button_width, *height, &contents_x, &contents_y, &contents_width, &contents_height); gtk_render_icon (down_context, cr, pixbuf, contents_x, contents_y + (contents_height - icon_size) / 2); g_object_unref (pixbuf); g_object_unref (down_context); g_object_unref (up_context); g_object_unref (entry_context); g_object_unref (spin_context); } static gboolean draw_cb (GtkWidget *widget, cairo_t *cr) { gint panewidth, width, height; gint x, y; width = gtk_widget_get_allocated_width (widget); panewidth = width / 2; height = gtk_widget_get_allocated_height (widget); cairo_rectangle (cr, 0, 0, width, height); cairo_set_source_rgb (cr, 0.9, 0.9, 0.9); cairo_fill (cr); x = y = 10; draw_horizontal_scrollbar (widget, cr, x, y, panewidth - 20, 30, GTK_STATE_FLAG_NORMAL, &height); y += height + 8; draw_horizontal_scrollbar (widget, cr, x, y, panewidth - 20, 40, GTK_STATE_FLAG_PRELIGHT, &height); y += height + 8; draw_horizontal_scrollbar (widget, cr, x, y, panewidth - 20, 50, GTK_STATE_FLAG_ACTIVE|GTK_STATE_FLAG_PRELIGHT, &height); y += height + 8; draw_text (widget, cr, x, y, panewidth - 20, 20, "Not selected", GTK_STATE_FLAG_NORMAL); y += 20 + 10; draw_text (widget, cr, x, y, panewidth - 20, 20, "Selected", GTK_STATE_FLAG_SELECTED); x = 10; y += 20 + 10; draw_check (widget, cr, x, y, GTK_STATE_FLAG_NORMAL, &width, &height); x += width + 10; draw_check (widget, cr, x, y, GTK_STATE_FLAG_CHECKED, &width, &height); x += width + 10; draw_radio (widget, cr, x, y, GTK_STATE_FLAG_NORMAL, &width, &height); x += width + 10; draw_radio (widget, cr, x, y, GTK_STATE_FLAG_CHECKED, &width, &height); x = 10; y += height + 10; draw_progress (widget, cr, x, y, panewidth - 20, 50, &height); y += height + 10; draw_scale (widget, cr, x, y, panewidth - 20, 75, &height); y += height + 20; draw_notebook (widget, cr, x, y, panewidth - 20, 160); /* Second column */ x += panewidth; y = 10; draw_menu (widget, cr, x, y, panewidth - 20, &height); y += height + 10; draw_menubar (widget, cr, x, y, panewidth - 20, &height); y += height + 20; draw_spinbutton (widget, cr, x, y, panewidth - 20, &height); y += height + 30; draw_combobox (widget, cr, x, y, panewidth - 20, FALSE, &height); y += height + 10; draw_combobox (widget, cr, 10 + panewidth, y, panewidth - 20, TRUE, &height); return FALSE; } GtkWidget * do_foreigndrawing (GtkWidget *do_widget) { static GtkWidget *window = NULL; if (!window) { GtkWidget *box; GtkWidget *da; window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_title (GTK_WINDOW (window), "Foreign drawing"); gtk_window_set_screen (GTK_WINDOW (window), gtk_widget_get_screen (do_widget)); g_signal_connect (window, "destroy", G_CALLBACK (gtk_widget_destroyed), &window); box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10); gtk_container_add (GTK_CONTAINER (window), box); da = gtk_drawing_area_new (); gtk_widget_set_size_request (da, 400, 400); gtk_widget_set_hexpand (da, TRUE); gtk_widget_set_vexpand (da, TRUE); gtk_widget_set_app_paintable (da, TRUE); gtk_container_add (GTK_CONTAINER (box), da); g_signal_connect (da, "draw", G_CALLBACK (draw_cb), NULL); } if (!gtk_widget_get_visible (window)) gtk_widget_show_all (window); else gtk_widget_destroy (window); return window; }