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| -rw-r--r-- | COPYING | 510 | ||||
| -rw-r--r-- | README.md | 71 | ||||
| -rw-r--r-- | meson.build | 33 | ||||
| -rw-r--r-- | sgm-flexible-mnemonics.c | 121 | ||||
| -rw-r--r-- | sgm-overlay-scrolling-override.c | 144 |
5 files changed, 879 insertions, 0 deletions
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See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +Also add information on how to contact you by electronic and paper mail. + +You should also get your employer (if you work as a programmer) or +your school, if any, to sign a "copyright disclaimer" for the library, +if necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James + Random Hacker. + + <signature of Ty Coon>, 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! + + diff --git a/README.md b/README.md new file mode 100644 index 0000000..f233052 --- /dev/null +++ b/README.md @@ -0,0 +1,71 @@ +# SGM: The STLWRT-ian GTK Modules +## GTK Modules of all kinds, for a classic GTK+ 2-esque user interface + +SGM is a collection of useful modules for GTK, mostly to restore a more +classic user interface and experience to GTK+ 3 and above. Currently, +this repository only contains the code for the "sgm-flexible-mnemonics" +module, but more are planned to follow. Similarly, this module is known +not to work with GTK 4 yet, but support for GTK 4 should come eventually +too, as long as the community doesn't drag their feet in adopting GTK 4 +but that's a different story). + +### sgm-flexible-mnemonics + +*Mnemonics* are the underlined portions of text which indicate which key to +press to activate a particular widget, be it a menu item or a button. +Prior to GTK+ 3.9.8, a setting called `gtk-auto-mnemonics` could be modified +to either always display these underlines, or display these underlines only +when the "modifier key" (typically Alt on many keyboards) was pressed. In +GTK+ 3.9.8, the latter mode is always used no matter the setting of +`gtk-auto-mnemonics`. This module restores the classic mnemonic behavior to +GTK+ 3.9.8 and later versions of GTK. + +### sgm-overlay-scrolling **(COMING SOON)** + +Traditionally, scrollbars have appeared to the side of scrolled content. +In GTK+ 3.15.0, a new means of displaying scrollbars was introduced: +*overlay scrolling*. When overlay scrolling is enabled, scrollbars do not +initially appear; instead they wait for mouse movement before appearing, +and even then appear *on top* of scrolled content instead of *to the side* +of said content. This is good for users with little screen space, and it +would be tolerable to other users if there were an easy way to disable it; +however, until GTK+ 3.24.9 there was only an environment variable to +disable overlay scrolling globally. An environment variable is tolerable, +but it needs to be set every time a GTK application is run, or else overlay +scrolling will be enabled again. In GTK+ 3.24.9, a new setting was +introduced to disable overlay scrolling globally, `gtk-overlay-scrolling`. +But this setting left users of older versions of GTK in the lurch; even +today, some users continue to use GTK versions as old as 3.18 because that +is the latest version shipped by their distributor for an old Long Term +Support release of their distribution. This module adds the +`gtk-overlay-scrolling` setting to GTK versions prior to 3.24.9, so that +conservative themes can universally set the `gtk-overlay-scrolling` +property to `false` to disable overlay scrolling -- even on GTK versions +prior to 3.24.9. + +I created this module not so much because doing so is a necessity; it +is mostly because I admittedly have a big, fat mouth and told a friend of +mine that I could write a module for this. But it's also good to have a +module that brings the GTK+ 3.24.9-and-later behavior to older versions +of GTK, I suppose. Either way, my fat mouth has cost me and you're seeing +the fruits of my embarassing talkativeness. But that's enough on the +topic of my fat mouth. + +### Planned modules for the future + + * A "GTK Inspector"-like tool for GTK+ 2 would be quite cool and useful. + Better yet, it doesn't need to be loaded all the time -- just when you + think you'll need to debug a GTK program! + + * A module to add scrollbar stepper buttons to the ends of scrollbars on + GTK 4 is in the works. I actually have it working, I just need to + commit it to this repository and clean it up a little. + +If you have any further ideas on what you want in GTK, please file an +issue on this repository! Pull requests are also welcome. If you +find an issue in one of these modules, please start an issue for that, +too. + +*** + +Thanks for checking out (pun intended) this repository! diff --git a/meson.build b/meson.build new file mode 100644 index 0000000..291f0b0 --- /dev/null +++ b/meson.build @@ -0,0 +1,33 @@ +project('sgm', 'c', + version : '0.90.0', + default_options : ['warning_level=3'], + license: 'LGPLv2.1+') + + +gtk_dep = dependency('gtk+-3.0', version: '>= 3.8.0') + +modules_subdir = 'gtk-3.0/modules' +modules_install_dir = join_paths(gtk_dep.get_variable( + pkgconfig: 'libdir', + internal: 'libdir', + default_value: get_option('libdir')), modules_subdir) + + +# Don't enable this until the module is ready to go. +#shared_module('sgm-overlay-scrolling-override', +# sources: [ +# 'sgm-overlay-scrolling-override.c', +# ], +# dependencies: [ gtk_dep ], +# install_dir: modules_install_dir, +# install: true, +#) + +shared_module('sgm-flexible-mnemonics', + sources: [ + 'sgm-flexible-mnemonics.c', + ], + dependencies: [ gtk_dep ], + install_dir: modules_install_dir, + install: true, +) diff --git a/sgm-flexible-mnemonics.c b/sgm-flexible-mnemonics.c new file mode 100644 index 0000000..8249c95 --- /dev/null +++ b/sgm-flexible-mnemonics.c @@ -0,0 +1,121 @@ +/* + * SGM -- The STLWRT-ian GTK Modules + * Copyright (C) 2021 Gordon N. Squash. + * + * This module is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This module 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this module; see the file COPYING. If not, + * write to the Free Software Foundation, Inc., 51 Franklin Street, + * Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/* + * This module, "sgm-flexible-mnemonics", adds the code back to GTK to + * configure the display of mnemonics -- mnemonics being the underlined + * letters in menu items and buttons which, when the corresponding letter + * key is pressed, activates the menu item or button in question. + * Historically, GTK has allowed the user to alter whether mnemonics are + * displayed at all and whether mnemonics are displayed all the time, or + * only when the user presses a modifier key, seemingly about to activate + * one of the widgets with a mnemonic. Since GTK+ 3.9.8 (development + * version of GTK+ 3.10), however, the behavior of mnemonics has been + * hard-coded in GTK, and people who don't like the new default GTK + * behavior are left frustrated that they, for example, can't see menu + * mnemonics all the time. This module adds the configurability back + * to GTK. + * + * This module uses a slightly round-about hack to always display mnemonics. + * This module hooks into the "size_allocate" function of each and every + * GtkLabel, and ensures the label's toplevel window has the + * "mnemonics-visible" property set to TRUE. It would be nice to simply + * hook into a GtkWindow's "mnemonics-visible" property and reset the + * property to TRUE if it is ever set to FALSE by GTK. However, this + * doesn't work so well in practice, since in reality mnemonics are + * displayed globally and then hidden on a per-label basis. Hence we need + * to ensure that no label has mnemonics turned off, if "gtk-auto-mnemonics" + * is set to FALSE. + */ + + +#include <gtk/gtk.h> +#include <glib.h> + + +static void (*original_gtk_label_size_allocate) (GtkWidget *widget, + GtkAllocation *allocation); + +static void sgm_gtk_label_size_allocate (GtkWidget *widget, + GtkAllocation *allocation); + + +/* Function definitions */ +G_MODULE_EXPORT const char * +g_module_check_init (GModule *module) +{ + /* + * Exit immediately on GTK+ versions prior to 3.9.8. This is because + * configurable mnemonics support was removed in 3.9.8, and this + * module is unnecessary on earlier versions of GTK+. + */ + if (gtk_check_version (3,9,8) != NULL) + { + return "Your version of GTK+ is old enough that this module is redundant.\n" + "This module will therefore not load."; + } + + /* + * Otherwise, this module is useful for the current version of GTK+, so + * proceed with loading it. + */ + else + { + g_module_make_resident (module); + return NULL; + } +} + +G_MODULE_EXPORT int +gtk_module_init (gint * argc, char *** argv) +{ + GtkWidgetClass *gtk_label_class; + + (void) argc; + (void) argv; + + gtk_label_class = g_type_class_ref (GTK_TYPE_LABEL); + original_gtk_label_size_allocate = gtk_label_class->size_allocate; + gtk_label_class->size_allocate = sgm_gtk_label_size_allocate; + g_type_class_unref (gtk_label_class); + + return 0; +} + + +static void +sgm_gtk_label_size_allocate (GtkWidget *widget, + GtkAllocation *allocation) +{ + GtkWidget *toplevel_window; + GtkSettings *settings; + gboolean auto_mnemonics; + gboolean mnemonics_visible; + + original_gtk_label_size_allocate (widget, allocation); + + toplevel_window = gtk_widget_get_toplevel (widget); + settings = gtk_widget_get_settings (toplevel_window); + g_object_get (settings, "gtk-auto-mnemonics", &auto_mnemonics, NULL); + g_object_get (toplevel_window, "mnemonics-visible", &mnemonics_visible, NULL); + + if (!mnemonics_visible && !auto_mnemonics) + g_object_set (toplevel_window, "mnemonics-visible", TRUE, NULL); +} diff --git a/sgm-overlay-scrolling-override.c b/sgm-overlay-scrolling-override.c new file mode 100644 index 0000000..13116af --- /dev/null +++ b/sgm-overlay-scrolling-override.c @@ -0,0 +1,144 @@ +#include <gtk/gtk.h> +#include <glib.h> + + +enum +{ + /* + * In GTK+ 3.24.9 and later, the "overlay-scrolling" property is assigned + * a property number of 85. We might as well follow that convention here + * and avoid any property number collisions. + */ + PROP_OVERLAY_SCROLLING = 85 +}; + + +static gboolean overlay_scrolling_enabled = TRUE; + +static GParamSpec * gtk_overlay_scrolling_pspec; + + +static void (*original_gtk_settings_set_property) (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); + +static void (*original_gtk_settings_get_property) (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); + + +static void overridden_gtk_settings_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); + +static void overridden_gtk_settings_get_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); + + +G_MODULE_EXPORT const char * +g_module_check_init (GModule *module) +{ + /* + * Exit immediately on GTK+ versions prior to 3.15.0, since overlay + * scrolling hadn't been introduced yet! + */ + if (gtk_check_version (3,15,0) != NULL) + { + return "Your version of GTK+ is too old to support overlay scrolling.\n" + "This module is thus unnecessary and you should remove it."; + } + + /* + * Similarly, a property was introduced in GTK+ 3.24.9 to disable overlay + * scrolling globally, making this module redundant. + */ + else if (gtk_check_version (3,24,9) == NULL) + { + return "Your version of GTK+ already supports globally disabling overlay scrolling.\n" + "This module is thus redundant and you should remove it."; + } + + /* + * Otherwise, this module is useful for the current version of GTK+, so + * proceed with loading it. + */ + else + { + g_module_make_resident (module); + return NULL; + } +} + +G_MODULE_EXPORT int +gtk_module_init (gint * argc, char *** argv) +{ + GtkSettingsClass *gtk_settings_class; + GtkScrolledWindowClass *gtk_scrolled_window_class; + + (void) argc; + (void) argv; + + gtk_settings_class = g_type_class_ref (GTK_TYPE_SETTINGS); + + gtk_overlay_scrolling_pspec = g_param_spec_boolean ("gtk-overlay-scrolling", + "Overlay Scrolling", + "Whether to enable overlay scrolling mode globally", + overlay_scrolling_enabled, + G_PARAM_READWRITE); + + g_object_class_install_property (gtk_settings_class, + PROP_OVERLAY_SCROLLING, + gtk_overlay_scrolling_pspec); + + original_gtk_settings_set_property = G_OBJECT_CLASS (gtk_settings_class)->set_property; + G_OBJECT_CLASS (gtk_settings_class)->set_property = overridden_gtk_settings_class_set_property; + + original_gtk_settings_get_property = G_OBJECT_CLASS (gtk_settings_class)->get_property; + G_OBJECT_CLASS (gtk_settings_class)->get_property = overridden_gtk_settings_class_get_property; + + g_type_class_unref (gtk_settings_class); + + + + + return 0; +} + + +static void overridden_gtk_settings_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + switch (property_id) + { + case PROP_OVERLAY_SCROLLING: + overlay_scrolling_enabled = g_value_get_boolean (value); + break; + + default: + original_gtk_settings_set_property (object, property_id, value, pspec); + } +} + + +static void overridden_gtk_settings_get_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + switch (property_id) + { + case PROP_OVERLAY_SCROLLING: + g_value_set_boolean (value, overlay_scrolling_enabled); + break; + + default: + original_gtk_settings_get_property (object, property_id, value, pspec); + } +} |