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livetrax/libs/gtkmm2ext/utils.cc
Robin Gareus f9d80c32d6
Allow to destroy Widgets when removing them from a container 
This is useful when the container uses manage()d Widgets,
which are otherwise not destroyed.
2022-04-14 16:35:02 +02:00

1251 lines
34 KiB
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/*
* Copyright (C) 1999-2016 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2005-2008 Doug McLain <doug@nostar.net>
* Copyright (C) 2010-2012 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2011-2015 David Robillard <d@drobilla.net>
* Copyright (C) 2014-2016 John Emmas <john@creativepost.co.uk>
* Copyright (C) 2014-2019 Robin Gareus <robin@gareus.org>
* Copyright (C) 2016 Julien "_FrnchFrgg_" RIVAUD <frnchfrgg@free.fr>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <map>
#include <algorithm>
#include <iostream>
#include <gtk/gtkpaned.h>
#include <gtk/gtk.h>
#include <gtkmm/widget.h>
#include <gtkmm/button.h>
#include <gtkmm/window.h>
#include <gtkmm/paned.h>
#include <gtkmm/label.h>
#include <gtkmm/comboboxtext.h>
#include <gtkmm/tooltip.h>
#include <gtkmm/menuitem.h>
#include "gtkmm2ext/utils.h"
#include "gtkmm2ext/persistent_tooltip.h"
#include "pbd/i18n.h"
using namespace std;
void
Gtkmm2ext::init (const char* localedir)
{
#if ENABLE_NLS
(void) bindtextdomain(PACKAGE, localedir);
(void) bind_textdomain_codeset (PACKAGE, "UTF-8");
#endif
}
void
Gtkmm2ext::get_ink_pixel_size (Glib::RefPtr<Pango::Layout> layout,
int& width,
int& height)
{
Pango::Rectangle ink_rect = layout->get_ink_extents ();
width = PANGO_PIXELS(ink_rect.get_width());
height = PANGO_PIXELS(ink_rect.get_height());
}
void
Gtkmm2ext::get_pixel_size (Glib::RefPtr<Pango::Layout> layout,
int& width,
int& height)
{
layout->get_pixel_size (width, height);
}
void
Gtkmm2ext::set_size_request_to_display_given_text (Gtk::Widget &w, const gchar *text,
gint hpadding, gint vpadding)
{
int width, height;
w.ensure_style ();
get_pixel_size (w.create_pango_layout (text), width, height);
w.set_size_request(width + hpadding, height + vpadding);
}
/** Set width request to display given text, and height to display anything.
* This is useful for setting many widgets to the same height for consistency. */
void
Gtkmm2ext::set_size_request_to_display_given_text_width (Gtk::Widget& w,
const gchar* htext,
gint hpadding,
gint vpadding)
{
static const gchar* vtext = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
w.ensure_style ();
int hwidth, hheight;
get_pixel_size (w.create_pango_layout (htext), hwidth, hheight);
int vwidth, vheight;
get_pixel_size (w.create_pango_layout (vtext), vwidth, vheight);
w.set_size_request(hwidth + hpadding, vheight + vpadding);
}
void
Gtkmm2ext::set_height_request_to_display_any_text (Gtk::Widget& w, gint vpadding)
{
static const gchar* vtext = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
w.ensure_style ();
int width, height;
get_pixel_size (w.create_pango_layout (vtext), width, height);
w.set_size_request(-1, height + vpadding);
}
void
Gtkmm2ext::set_size_request_to_display_given_text (Gtk::Widget &w, std::string const & text,
gint hpadding, gint vpadding)
{
int width, height;
w.ensure_style ();
get_pixel_size (w.create_pango_layout (text), width, height);
w.set_size_request(width + hpadding, height + vpadding);
}
void
Gtkmm2ext::set_size_request_to_display_given_text (Gtk::Widget &w,
const std::vector<std::string>& strings,
gint hpadding, gint vpadding)
{
int width, height;
int width_max = 0;
int height_max = 0;
w.ensure_style ();
vector<string> copy;
const vector<string>* to_use;
vector<string>::const_iterator i;
for (i = strings.begin(); i != strings.end(); ++i) {
if ((*i).find_first_of ("gy") != string::npos) {
/* contains a descender */
break;
}
}
if (i == strings.end()) {
/* make a copy of the strings then add one that has a descender */
copy = strings;
copy.push_back ("g");
to_use = &copy;
} else {
to_use = &strings;
}
for (vector<string>::const_iterator i = to_use->begin(); i != to_use->end(); ++i) {
get_pixel_size (w.create_pango_layout (*i), width, height);
width_max = max(width_max,width);
height_max = max(height_max, height);
}
w.set_size_request(width_max + hpadding, height_max + vpadding);
}
/** This version specifies horizontal padding in text to avoid assumptions
* about font size. Should be used anywhere padding is used to avoid text,
* like combo boxes.
*/
void
Gtkmm2ext::set_size_request_to_display_given_text (Gtk::Widget& w,
const std::vector<std::string>& strings,
const std::string& hpadding,
gint vpadding)
{
int width_max = 0;
int height_max = 0;
w.ensure_style ();
for (vector<string>::const_iterator i = strings.begin(); i != strings.end(); ++i) {
int width, height;
get_pixel_size (w.create_pango_layout (*i), width, height);
width_max = max(width_max,width);
height_max = max(height_max, height);
}
int pad_width;
int pad_height;
get_pixel_size (w.create_pango_layout (hpadding), pad_width, pad_height);
w.set_size_request(width_max + pad_width, height_max + vpadding);
}
static inline guint8
demultiply_alpha (guint8 src,
guint8 alpha)
{
/* cairo pixel buffer data contains RGB values with the alpha
* values premultiplied.
*
* GdkPixbuf pixel buffer data contains RGB values without the
* alpha value applied.
*
* this removes the alpha component from the cairo version and
* returns the GdkPixbuf version.
*/
return alpha ? ((guint (src) << 8) - src) / alpha : 0;
}
void
Gtkmm2ext::convert_bgra_to_rgba (guint8 const* src,
guint8* dst,
int width,
int height)
{
guint8 const* src_pixel = src;
guint8* dst_pixel = dst;
/* cairo pixel data is endian-dependent ARGB with A in the most significant 8 bits,
* with premultipled alpha values (see preceding function)
*
* GdkPixbuf pixel data is non-endian-dependent RGBA with R in the lowest addressable
* 8 bits, and non-premultiplied alpha values.
*
* convert from the cairo values to the GdkPixbuf ones.
*/
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
/* Cairo [ B G R A ] is actually [ B G R A ] in memory SOURCE
0 1 2 3
Pixbuf [ R G B A ] is actually [ R G B A ] in memory DEST
*/
dst_pixel[0] = demultiply_alpha (src_pixel[2],
src_pixel[3]); // R [0] <= [ 2 ]
dst_pixel[1] = demultiply_alpha (src_pixel[1],
src_pixel[3]); // G [1] <= [ 1 ]
dst_pixel[2] = demultiply_alpha (src_pixel[0],
src_pixel[3]); // B [2] <= [ 0 ]
dst_pixel[3] = src_pixel[3]; // alpha
#elif G_BYTE_ORDER == G_BIG_ENDIAN
/* Cairo [ B G R A ] is actually [ A R G B ] in memory SOURCE
0 1 2 3
Pixbuf [ R G B A ] is actually [ R G B A ] in memory DEST
*/
dst_pixel[0] = demultiply_alpha (src_pixel[1],
src_pixel[0]); // R [0] <= [ 1 ]
dst_pixel[1] = demultiply_alpha (src_pixel[2],
src_pixel[0]); // G [1] <= [ 2 ]
dst_pixel[2] = demultiply_alpha (src_pixel[3],
src_pixel[0]); // B [2] <= [ 3 ]
dst_pixel[3] = src_pixel[0]; // alpha
#else
#error ardour does not currently support PDP-endianess
#endif
dst_pixel += 4;
src_pixel += 4;
}
}
}
Glib::RefPtr<Gdk::Pixbuf>
Gtkmm2ext::pixbuf_from_string(const string& name, const Pango::FontDescription& font, int clip_width, int clip_height, Gdk::Color fg)
{
static Glib::RefPtr<Gdk::Pixbuf>* empty_pixbuf = 0;
if (name.empty()) {
if (empty_pixbuf == 0) {
empty_pixbuf = new Glib::RefPtr<Gdk::Pixbuf>;
*empty_pixbuf = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, 8, clip_width, clip_height);
}
return *empty_pixbuf;
}
if (clip_width <= 0 || clip_height <= 0) {
/* negative values mean padding around natural size */
int width, height;
pixel_size (name, font, width, height);
if (clip_width <= 0) {
clip_width = width - clip_width;
}
if (clip_height <= 0) {
clip_height = height - clip_height;
}
}
Glib::RefPtr<Gdk::Pixbuf> buf = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, 8, clip_width, clip_height);
cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, clip_width, clip_height);
cairo_t* cr = cairo_create (surface);
cairo_text_extents_t te;
cairo_set_source_rgba (cr, fg.get_red_p(), fg.get_green_p(), fg.get_blue_p(), 1.0);
cairo_select_font_face (cr, font.get_family().c_str(),
CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr, font.get_size() / Pango::SCALE);
cairo_text_extents (cr, name.c_str(), &te);
cairo_move_to (cr, 0.5, int (0.5 - te.height / 2 - te.y_bearing + clip_height / 2));
cairo_show_text (cr, name.c_str());
convert_bgra_to_rgba(cairo_image_surface_get_data (surface), buf->get_pixels(), clip_width, clip_height);
cairo_destroy(cr);
cairo_surface_destroy(surface);
return buf;
}
static void
_position_menu_anchored (int& x, int& y, bool& push_in,
Gtk::Menu* const menu,
Gtk::Widget* const anchor,
const std::string& selected)
{
using namespace Gtk;
using namespace Gtk::Menu_Helpers;
/* TODO: lacks support for rotated dropdown buttons */
if (!anchor->has_screen () || !anchor->get_has_window ()) {
return;
}
Gdk::Rectangle monitor;
{
const int monitor_num = anchor->get_screen ()->get_monitor_at_window (
anchor->get_window ());
anchor->get_screen ()->get_monitor_geometry (
(monitor_num < 0) ? 0 : monitor_num, monitor);
}
const Requisition menu_req = menu->size_request();
const Gdk::Rectangle allocation = anchor->get_allocation();
/* The x and y position are handled separately.
*
* For the x position if the direction is LTR (or RTL), then we try in order:
* a) align the left (right) of the menu with the left (right) of the button
* if there's enough room until the right (left) border of the screen;
* b) align the right (left) of the menu with the right (left) of the button
* if there's enough room until the left (right) border of the screen;
* c) align the right (left) border of the menu with the right (left) border
* of the screen if there's enough space;
* d) align the left (right) border of the menu with the left (right) border
* of the screen, with the rightmost (leftmost) part of the menu that
* overflows the screen.
* XXX We always align left regardless of the direction because if x is
* left of the current monitor, the menu popup code after us notices it
* and enforces that the menu stays in the monitor that's at the left...*/
anchor->get_window ()->get_origin (x, y);
if (anchor->get_direction() == TEXT_DIR_RTL) {
if (monitor.get_x() <= x + allocation.get_width() - menu_req.width) {
/* a) align menu right and button right */
x += allocation.get_width() - menu_req.width;
} else if (x + menu_req.width <= monitor.get_x() + monitor.get_width()) {
/* b) align menu left and button left: nothing to do*/
} else if (menu_req.width <= monitor.get_width()) {
/* c) align menu left and screen left, guaranteed to fit */
x = monitor.get_x();
} else {
/* d) XXX align left or the menu might change monitors */
x = monitor.get_x();
}
} else { /* LTR */
if (x + menu_req.width <= monitor.get_x() + monitor.get_width()) {
/* a) align menu left and button left: nothing to do*/
} else if (monitor.get_x() <= x + allocation.get_width() - menu_req.width) {
/* b) align menu right and button right */
x += allocation.get_width() - menu_req.width;
} else if (menu_req.width <= monitor.get_width()) {
/* c) align menu right and screen right, guaranteed to fit */
x = monitor.get_x() + monitor.get_width() - menu_req.width;
} else {
/* d) align left */
x = monitor.get_x();
}
}
/* For the y position, try in order:
* a) if there is a menu item with the same text as the button, align it
* with the button, unless that makes the menu overflow the monitor.
* b) align the top of the menu with the bottom of the button if there is
* enough room below the button;
* c) align the bottom of the menu with the top of the button if there is
* enough room above the button;
* d) try aligning the selected menu item again, this time with scrollbars;
* e) if there is no selected menu item, align the menu above the button or
* below the button, depending on where there is more space.
* For the d) and e) cases, the menu contents will be aligned as told, but
* the menu itself will be bigger than that to accomodate the menu items
* that are scrolled out of view, thanks to |push_in = true|.
*/
const MenuList& items = menu->items ();
int offset = 0;
MenuList::const_iterator i = items.begin();
for ( ; i != items.end(); ++i) {
const Label* label_widget = dynamic_cast<const Label*>(i->get_child());
if (label_widget && selected == ((std::string) label_widget->get_label())) {
offset += (i->size_request().height - allocation.get_height()) / 2;
menu->select_item(*i);
break;
}
offset += i->size_request().height;
}
if (i != items.end() &&
y - offset >= monitor.get_y() &&
y - offset + menu_req.height <= monitor.get_y() + monitor.get_height()) {
y -= offset; /* a) */
} else if (y + allocation.get_height() + menu_req.height <= monitor.get_y() + monitor.get_height()) {
y += allocation.get_height(); /* b) */
} else if ((y - menu_req.height) >= monitor.get_y()) {
y -= menu_req.height; /* c) */
} else if (i != items.end()) {
y -= offset; /* d) */
menu->gobj()->upper_arrow_visible = 1; /* work around a gtk bug for the first show */
} else if (monitor.get_height() - allocation.get_height() >= 2*(y - monitor.get_y())) {
y += allocation.get_height(); /* e), more space below */
menu->gobj()->upper_arrow_visible = 1; /* work around a gtk bug for the first show */
} else {
y -= menu_req.height; /* e), more space above */
menu->gobj()->upper_arrow_visible = 1; /* work around a gtk bug for the first show */
}
/* Workaround a bug in GTK where they don't tweak the scroll offset by the arrow height
* if the scroll offset is negative. See the condition at:
* https://gitlab.gnome.org/GNOME/gtk/blob/2.24.32/gtk/gtkmenu.c#L4395
* and the computation of scroll_offset at:
* https://gitlab.gnome.org/GNOME/gtk/blob/2.24.32/gtk/gtkmenu.c#L4360
* */
int arrow_height;
GtkArrowPlacement arrow_placement;
gtk_widget_style_get (GTK_WIDGET (menu->gobj()),
"scroll-arrow-vlength", &arrow_height,
"arrow_placement", &arrow_placement,
NULL);
int scroll_tweak = menu_req.height - monitor.get_height();
int scroll_offset = scroll_tweak + monitor.get_y() + monitor.get_height() - y - menu_req.height;
if (arrow_placement != GTK_ARROWS_END && scroll_tweak > 0 && scroll_offset < 0) {
y -= arrow_height;
}
push_in = true;
}
void
Gtkmm2ext::anchored_menu_popup (Gtk::Menu* const menu,
Gtk::Widget* const anchor,
const std::string& selected,
guint button, guint32 time)
{
menu->popup(
sigc::bind (sigc::ptr_fun(&_position_menu_anchored),
menu, anchor, selected),
button,
time);
}
void
Gtkmm2ext::set_popdown_strings (Gtk::ComboBoxText& cr, const vector<string>& strings)
{
vector<string>::const_iterator i;
cr.clear ();
for (i = strings.begin(); i != strings.end(); ++i) {
cr.append (*i);
}
}
void
Gtkmm2ext::get_popdown_strings (Gtk::ComboBoxText& cr, std::vector<std::string>& strings)
{
strings.clear ();
Glib::RefPtr<const Gtk::TreeModel> m = cr.get_model();
if (!m) {
return;
}
for(Gtk::TreeModel::iterator i = m->children().begin(); i != m->children().end(); ++i) {
Glib::ustring txt;
(*i)->get_value(0, txt);
strings.push_back (txt);
}
}
size_t
Gtkmm2ext::get_popdown_string_count (Gtk::ComboBoxText& cr)
{
Glib::RefPtr<const Gtk::TreeModel> m = cr.get_model();
if (!m) {
return 0;
}
return m->children().size();
}
bool
Gtkmm2ext::contains_value (Gtk::ComboBoxText& cr, const std::string text)
{
std::vector<std::string> s;
get_popdown_strings (cr, s);
return (std::find (s.begin(), s.end(), text) != s.end());
}
bool
Gtkmm2ext::set_active_text_if_present (Gtk::ComboBoxText& cr, const std::string text)
{
if (contains_value(cr, text)) {
cr.set_active_text (text);
return true;
}
return false;
}
GdkWindow*
Gtkmm2ext::get_paned_handle (Gtk::Paned& paned)
{
return GTK_PANED(paned.gobj())->handle;
}
void
Gtkmm2ext::set_decoration (Gtk::Window* win, Gdk::WMDecoration decor)
{
win->get_window()->set_decorations (decor);
}
void Gtkmm2ext::set_treeview_header_as_default_label(Gtk::TreeViewColumn* c)
{
gtk_tree_view_column_set_widget( c->gobj(), GTK_WIDGET(0) );
}
void
Gtkmm2ext::detach_menu (Gtk::Menu& menu)
{
/* its possible for a Gtk::Menu to have no gobj() because it has
not yet been instantiated. Catch this and provide a safe
detach method.
*/
if (menu.gobj()) {
if (menu.get_attach_widget()) {
menu.detach ();
}
}
}
bool
Gtkmm2ext::possibly_translate_keyval_to_make_legal_accelerator (uint32_t& keyval)
{
int fakekey = GDK_VoidSymbol;
switch (keyval) {
case GDK_Tab:
case GDK_ISO_Left_Tab:
fakekey = GDK_nabla;
break;
case GDK_Up:
fakekey = GDK_uparrow;
break;
case GDK_Down:
fakekey = GDK_downarrow;
break;
case GDK_Right:
fakekey = GDK_rightarrow;
break;
case GDK_Left:
fakekey = GDK_leftarrow;
break;
case GDK_Return:
fakekey = GDK_3270_Enter;
break;
case GDK_KP_Enter:
fakekey = GDK_F35;
break;
default:
break;
}
if (fakekey != GDK_VoidSymbol) {
keyval = fakekey;
return true;
}
return false;
}
uint32_t
Gtkmm2ext::possibly_translate_legal_accelerator_to_real_key (uint32_t keyval)
{
switch (keyval) {
case GDK_nabla:
return GDK_Tab;
break;
case GDK_uparrow:
return GDK_Up;
break;
case GDK_downarrow:
return GDK_Down;
break;
case GDK_rightarrow:
return GDK_Right;
break;
case GDK_leftarrow:
return GDK_Left;
break;
case GDK_3270_Enter:
return GDK_Return;
case GDK_F35:
return GDK_KP_Enter;
break;
}
return keyval;
}
int
Gtkmm2ext::physical_screen_height (Glib::RefPtr<Gdk::Window> win)
{
GdkScreen* scr = gdk_screen_get_default();
if (win) {
GdkRectangle r;
gint monitor = gdk_screen_get_monitor_at_window (scr, win->gobj());
gdk_screen_get_monitor_geometry (scr, monitor, &r);
return r.height;
} else {
return gdk_screen_get_height (scr);
}
}
int
Gtkmm2ext::physical_screen_width (Glib::RefPtr<Gdk::Window> win)
{
GdkScreen* scr = gdk_screen_get_default();
if (win) {
GdkRectangle r;
gint monitor = gdk_screen_get_monitor_at_window (scr, win->gobj());
gdk_screen_get_monitor_geometry (scr, monitor, &r);
return r.width;
} else {
return gdk_screen_get_width (scr);
}
}
void
Gtkmm2ext::container_clear (Gtk::Container& c, bool and_delete)
{
list<Gtk::Widget*> children = c.get_children();
for (list<Gtk::Widget*>::iterator child = children.begin(); child != children.end(); ++child) {
(*child)->hide ();
c.remove (**child);
if (and_delete) {
delete *child;
}
}
}
void
Gtkmm2ext::rounded_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double w, double h, double r)
{
rounded_rectangle (context->cobj(), x, y, w, h, r);
}
void
Gtkmm2ext::rounded_top_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double w, double h, double r)
{
rounded_top_rectangle (context->cobj(), x, y, w, h, r);
}
void
Gtkmm2ext::rounded_top_left_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double w, double h, double r)
{
rounded_top_left_rectangle (context->cobj(), x, y, w, h, r);
}
void
Gtkmm2ext::rounded_top_right_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double w, double h, double r)
{
rounded_top_right_rectangle (context->cobj(), x, y, w, h, r);
}
void
Gtkmm2ext::rounded_top_half_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double w, double h, double r)
{
rounded_top_half_rectangle (context->cobj(), x, y, w, h, r);
}
void
Gtkmm2ext::rounded_bottom_half_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double w, double h, double r)
{
rounded_bottom_half_rectangle (context->cobj(), x, y, w, h, r);
}
void
Gtkmm2ext::rounded_left_half_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double w, double h, double r)
{
rounded_left_half_rectangle (context->cobj(), x, y, w, h, r);
}
void
Gtkmm2ext::rounded_right_half_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double w, double h, double r)
{
rounded_right_half_rectangle (context->cobj(), x, y, w, h, r);
}
void
Gtkmm2ext::rounded_rectangle (cairo_t* cr, double x, double y, double w, double h, double r)
{
static const double degrees = M_PI / 180.0;
if (r < 1) {
cairo_rectangle (cr, x, y, w, h);
return;
}
cairo_new_sub_path (cr);
cairo_arc (cr, x + w - r, y + r, r, -90 * degrees, 0 * degrees); //tr
cairo_arc (cr, x + w - r, y + h - r, r, 0 * degrees, 90 * degrees); //br
cairo_arc (cr, x + r, y + h - r, r, 90 * degrees, 180 * degrees); //bl
cairo_arc (cr, x + r, y + r, r, 180 * degrees, 270 * degrees); //tl
cairo_close_path (cr);
}
void
Gtkmm2ext::rounded_left_half_rectangle (cairo_t* cr, double x, double y, double w, double h, double r)
{
static const double degrees = M_PI / 180.0;
cairo_new_sub_path (cr);
cairo_line_to (cr, x+w, y); // tr
cairo_line_to (cr, x+w, y + h); // br
cairo_arc (cr, x + r, y + h - r, r, 90 * degrees, 180 * degrees); //bl
cairo_arc (cr, x + r, y + r, r, 180 * degrees, 270 * degrees); //tl
cairo_close_path (cr);
}
void
Gtkmm2ext::rounded_right_half_rectangle (cairo_t* cr, double x, double y, double w, double h, double r)
{
static const double degrees = M_PI / 180.0;
cairo_new_sub_path (cr);
cairo_arc (cr, x + w - r, y + r, r, -90 * degrees, 0 * degrees); //tr
cairo_arc (cr, x + w - r, y + h - r, r, 0 * degrees, 90 * degrees); //br
cairo_line_to (cr, x, y + h); // bl
cairo_line_to (cr, x, y); // tl
cairo_close_path (cr);
}
void
Gtkmm2ext::rounded_top_half_rectangle (cairo_t* cr, double x, double y, double w, double h, double r)
{
static const double degrees = M_PI / 180.0;
cairo_new_sub_path (cr);
cairo_move_to (cr, x+w, y+h);
cairo_line_to (cr, x, y+h);
cairo_arc (cr, x + r, y + r, r, 180 * degrees, 270 * degrees); //tl
cairo_arc (cr, x + w - r, y + r, r, -90 * degrees, 0 * degrees); //tr
cairo_close_path (cr);
}
void
Gtkmm2ext::rounded_bottom_half_rectangle (cairo_t* cr, double x, double y, double w, double h, double r)
{
static const double degrees = M_PI / 180.0;
cairo_new_sub_path (cr);
cairo_move_to (cr, x, y);
cairo_line_to (cr, x+w, y);
cairo_arc (cr, x + w - r, y + h - r, r, 0 * degrees, 90 * degrees); //br
cairo_arc (cr, x + r, y + h - r, r, 90 * degrees, 180 * degrees); //bl
cairo_close_path (cr);
}
void
Gtkmm2ext::rounded_top_rectangle (cairo_t* cr, double x, double y, double w, double h, double r)
{
static const double degrees = M_PI / 180.0;
cairo_new_sub_path (cr);
cairo_move_to (cr, x+w, y+h);
cairo_line_to (cr, x, y+h);
cairo_arc (cr, x + r, y + r, r, 180 * degrees, 270 * degrees); //tl
cairo_arc (cr, x + w - r, y + r, r, -90 * degrees, 0 * degrees); //tr
cairo_close_path (cr);
}
void
Gtkmm2ext::rounded_top_left_rectangle (cairo_t* cr, double x, double y, double w, double h, double r)
{
/* A****B
H *
* *
* *
F****E
*/
cairo_move_to (cr, x+r,y); // Move to A
cairo_line_to (cr, x+w,y); // Straight line to B
cairo_line_to (cr, x+w,y+h); // Move to E
cairo_line_to (cr, x,y+h); // Line to F
cairo_line_to (cr, x,y+r); // Line to H
cairo_curve_to (cr, x,y,x,y,x+r,y); // Curve to A
}
void
Gtkmm2ext::rounded_top_right_rectangle (cairo_t* cr, double x, double y, double w, double h, double r)
{
/* A****BQ
* C
* *
* *
F****E
*/
cairo_move_to (cr, x,y); // Move to A
cairo_line_to (cr, x+w-r,y); // Straight line to B
cairo_curve_to (cr, x+w,y,x+w,y,x+w,y+r); // Curve to C, Control points are both at Q
cairo_line_to (cr, x+w,y+h); // Move to E
cairo_line_to (cr, x,y+h); // Line to F
cairo_line_to (cr, x,y); // Line to A
}
void
Gtkmm2ext::add_reflection (cairo_t* cr, double w, double h)
{
cairo_pattern_t* convex_pattern = cairo_pattern_create_linear (0.0, 0, 0.3, h * 0.7);
cairo_pattern_add_color_stop_rgba (convex_pattern, 0.0, 1, 1, 1, 0.10);
cairo_pattern_add_color_stop_rgba (convex_pattern, 0.79, 1, 1, 1, 0.03);
cairo_pattern_add_color_stop_rgba (convex_pattern, 1.0, 1, 1, 1, 0.0);
cairo_set_source (cr, convex_pattern);
Gtkmm2ext::rounded_rectangle (cr, 2, 2, w - 4, h - 4, 4);
cairo_fill (cr);
cairo_pattern_destroy(convex_pattern);
}
Glib::RefPtr<Gdk::Window>
Gtkmm2ext::window_to_draw_on (Gtk::Widget& w, Gtk::Widget** parent)
{
if (w.get_has_window()) {
return w.get_window();
}
(*parent) = w.get_parent();
while (*parent) {
if ((*parent)->get_has_window()) {
return (*parent)->get_window ();
}
(*parent) = (*parent)->get_parent ();
}
return Glib::RefPtr<Gdk::Window> ();
}
int
Gtkmm2ext::pixel_width (const string& str, const Pango::FontDescription& font)
{
Glib::RefPtr<Pango::Context> context = Glib::wrap (gdk_pango_context_get());
Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
layout->set_font_description (font);
layout->set_text (str);
int width, height;
Gtkmm2ext::get_ink_pixel_size (layout, width, height);
#ifdef __APPLE__
// Pango returns incorrect text width on some OS X
// So we have to make a correction
// To determine the correct indent take the largest symbol for which the width is correct
// and make the calculation
//
// see also libs/canvas/text.cc
int cor_width;
layout->set_text ("H");
layout->get_pixel_size (cor_width, height);
width += cor_width * 1.5;
#endif
return width;
}
void
Gtkmm2ext::pixel_size (const string& str, const Pango::FontDescription& font, int& width, int& height)
{
Gtk::Label foo;
Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout ("");
layout->set_font_description (font);
layout->set_text (str);
Gtkmm2ext::get_ink_pixel_size (layout, width, height);
}
#if 0
string
Gtkmm2ext::fit_to_pixels (const string& str, int pixel_width, Pango::FontDescription& font, int& actual_width, bool with_ellipses)
{
/* DECEMBER 2011: THIS PROTOTYPE OF fit_to_pixels() IS NOT USED
ANYWHERE AND HAS NOT BEEN TESTED.
*/
Gtk::Label foo;
Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout (str);
Glib::RefPtr<const Pango::LayoutLine> line;
layout->set_font_description (font);
layout->set_width (pixel_width * PANGO_SCALE);
if (with_ellipses) {
layout->set_ellipsize (Pango::ELLIPSIZE_END);
} else {
layout->set_wrap (Pango::WRAP_CHAR);
}
line = layout->get_line (0);
/* XXX: might need special care to get the ellipsis character, not sure
* how that works
*/
string s = string (layout->get_text ().substr(line->get_start_index(), line->get_length()));
cerr << "fit to pixels of " << str << " returns " << s << endl;
return s;
}
#endif
/** Try to fit a string into a given horizontal space by ellipsizing it.
* @param cr Cairo context in which the text will be plotted.
* @param name Text.
* @param avail Available horizontal space.
* @return (Text, possibly ellipsized) and (horizontal size of text)
*/
std::pair<std::string, double>
Gtkmm2ext::fit_to_pixels (cairo_t* cr, std::string name, double avail)
{
/* XXX hopefully there exists a more efficient way of doing this */
bool abbreviated = false;
uint32_t width = 0;
while (1) {
cairo_text_extents_t ext;
cairo_text_extents (cr, name.c_str(), &ext);
if (ext.width < avail || name.length() <= 4) {
width = ext.width;
break;
}
if (abbreviated) {
name = name.substr (0, name.length() - 4) + "...";
} else {
name = name.substr (0, name.length() - 3) + "...";
abbreviated = true;
}
}
return std::make_pair (name, width);
}
Gtk::Label *
Gtkmm2ext::left_aligned_label (string const & t)
{
Gtk::Label* l = new Gtk::Label (t);
l->set_alignment (0, 0.5);
return l;
}
Gtk::Label *
Gtkmm2ext::right_aligned_label (string const & t)
{
Gtk::Label* l = new Gtk::Label (t);
l->set_alignment (1, 0.5);
return l;
}
static bool
make_null_tooltip (int, int, bool, const Glib::RefPtr<Gtk::Tooltip>& t)
{
t->set_tip_area (Gdk::Rectangle (0, 0, 0, 0));
return true;
}
/** Hackily arrange for the provided widget to have no tooltip,
* and also to stop any other widget from providing one while
* the mouse is over w.
*/
void
Gtkmm2ext::set_no_tooltip_whatsoever (Gtk::Widget& w)
{
w.property_has_tooltip() = true;
w.signal_query_tooltip().connect (sigc::ptr_fun (make_null_tooltip));
}
void
Gtkmm2ext::enable_tooltips ()
{
gtk_rc_parse_string ("gtk-enable-tooltips = 1");
PersistentTooltip::set_tooltips_enabled (true);
}
void
Gtkmm2ext::disable_tooltips ()
{
gtk_rc_parse_string ("gtk-enable-tooltips = 0");
PersistentTooltip::set_tooltips_enabled (false);
}
bool
Gtkmm2ext::event_inside_widget_window (Gtk::Widget& widget, GdkEvent* ev)
{
gdouble evx, evy;
if (!gdk_event_get_root_coords (ev, &evx, &evy)) {
return false;
}
gint x, y;
gint wx, wy;
gint width, height, depth;
Glib::RefPtr<Gdk::Window> widget_window = widget.get_window();
widget_window->get_geometry (x, y, width, height, depth);
widget_window->get_origin (wx, wy);
if ((evx >= wx && evx < wx + width) &&
(evy >= wy && evy < wy + height)) {
return true;
}
return false;
}
const char*
Gtkmm2ext::event_type_string (int event_type)
{
switch (event_type) {
case GDK_NOTHING:
return "nothing";
case GDK_DELETE:
return "delete";
case GDK_DESTROY:
return "destroy";
case GDK_EXPOSE:
return "expose";
case GDK_MOTION_NOTIFY:
return "motion_notify";
case GDK_BUTTON_PRESS:
return "button_press";
case GDK_2BUTTON_PRESS:
return "2button_press";
case GDK_3BUTTON_PRESS:
return "3button_press";
case GDK_BUTTON_RELEASE:
return "button_release";
case GDK_KEY_PRESS:
return "key_press";
case GDK_KEY_RELEASE:
return "key_release";
case GDK_ENTER_NOTIFY:
return "enter_notify";
case GDK_LEAVE_NOTIFY:
return "leave_notify";
case GDK_FOCUS_CHANGE:
return "focus_change";
case GDK_CONFIGURE:
return "configure";
case GDK_MAP:
return "map";
case GDK_UNMAP:
return "unmap";
case GDK_PROPERTY_NOTIFY:
return "property_notify";
case GDK_SELECTION_CLEAR:
return "selection_clear";
case GDK_SELECTION_REQUEST:
return "selection_request";
case GDK_SELECTION_NOTIFY:
return "selection_notify";
case GDK_PROXIMITY_IN:
return "proximity_in";
case GDK_PROXIMITY_OUT:
return "proximity_out";
case GDK_DRAG_ENTER:
return "drag_enter";
case GDK_DRAG_LEAVE:
return "drag_leave";
case GDK_DRAG_MOTION:
return "drag_motion";
case GDK_DRAG_STATUS:
return "drag_status";
case GDK_DROP_START:
return "drop_start";
case GDK_DROP_FINISHED:
return "drop_finished";
case GDK_CLIENT_EVENT:
return "client_event";
case GDK_VISIBILITY_NOTIFY:
return "visibility_notify";
case GDK_NO_EXPOSE:
return "no_expose";
case GDK_SCROLL:
return "scroll";
case GDK_WINDOW_STATE:
return "window_state";
case GDK_SETTING:
return "setting";
case GDK_OWNER_CHANGE:
return "owner_change";
case GDK_GRAB_BROKEN:
return "grab_broken";
case GDK_DAMAGE:
return "damage";
}
return "unknown";
}
std::string
Gtkmm2ext::markup_escape_text (std::string const& s)
{
return Glib::Markup::escape_text (s);
}
void
Gtkmm2ext::add_volume_shortcuts (Gtk::FileChooser& c)
{
#ifdef __APPLE__
try {
/* This is a first order approach, listing all mounted volumes (incl network).
* One could use `diskutil` or `mount` to query local disks only, or
* something even fancier if deemed appropriate.
*/
Glib::Dir dir("/Volumes");
for (Glib::DirIterator di = dir.begin(); di != dir.end(); di++) {
string fullpath = Glib::build_filename ("/Volumes", *di);
if (!Glib::file_test (fullpath, Glib::FILE_TEST_IS_DIR)) continue;
try { /* add_shortcut_folder throws an exception if the folder being added already has a shortcut */
c.add_shortcut_folder (fullpath);
}
catch (Glib::Error& e) {
std::cerr << "add_shortcut_folder() threw Glib::Error: " << e.what() << std::endl;
}
}
}
catch (Glib::FileError const& e) {
std::cerr << "listing /Volumnes failed: " << e.what() << std::endl;
}
#endif
}
float
Gtkmm2ext::paned_position_as_fraction (Gtk::Paned& paned, bool h)
{
const guint pos = gtk_paned_get_position (const_cast<GtkPaned*>(static_cast<const Gtk::Paned*>(&paned)->gobj()));
return (double) pos / (h ? paned.get_allocation().get_height() : paned.get_allocation().get_width());
}
void
Gtkmm2ext::paned_set_position_as_fraction (Gtk::Paned& paned, float fraction, bool h)
{
gint v = (h ? paned.get_allocation().get_height() : paned.get_allocation().get_width());
if (v < 1) {
return;
}
paned.set_position ((guint) floor (fraction * v));
}
string
Gtkmm2ext::show_gdk_event_state (int state)
{
string s;
if (state & GDK_SHIFT_MASK) {
s += "+SHIFT";
}
if (state & GDK_LOCK_MASK) {
s += "+LOCK";
}
if (state & GDK_CONTROL_MASK) {
s += "+CONTROL";
}
if (state & GDK_MOD1_MASK) {
s += "+MOD1";
}
if (state & GDK_MOD2_MASK) {
s += "+MOD2";
}
if (state & GDK_MOD3_MASK) {
s += "+MOD3";
}
if (state & GDK_MOD4_MASK) {
s += "+MOD4";
}
if (state & GDK_MOD5_MASK) {
s += "+MOD5";
}
if (state & GDK_BUTTON1_MASK) {
s += "+BUTTON1";
}
if (state & GDK_BUTTON2_MASK) {
s += "+BUTTON2";
}
if (state & GDK_BUTTON3_MASK) {
s += "+BUTTON3";
}
if (state & GDK_BUTTON4_MASK) {
s += "+BUTTON4";
}
if (state & GDK_BUTTON5_MASK) {
s += "+BUTTON5";
}
if (state & GDK_SUPER_MASK) {
s += "+SUPER";
}
if (state & GDK_HYPER_MASK) {
s += "+HYPER";
}
if (state & GDK_META_MASK) {
s += "+META";
}
if (state & GDK_RELEASE_MASK) {
s += "+RELEASE";
}
return s;
}
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