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gui: Change Windows title bar based on theme

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On Windows, the title bar can be set to light or dark mode via DwmSetWindowAttribute ().
This adds code to update the main title bar and dialogue title bars based on the current theme.
The main title bar uses "prefer-dark-theme", while the dialogue title bars
uses the color of the widget background to assume the correct color.
This commit is contained in:
Alx Sa
2023-10-16 16:43:17 +00:00
parent bf8ee69570
commit ad8b47bff7
11 changed files with 230 additions and 34 deletions
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96
libgimpwidgets/gimpdialog.c
View File

@ -34,6 +34,14 @@
#include "libgimp/libgimp-intl.h"
#ifdef G_OS_WIN32
#include <dwmapi.h>
#include <gdk/gdkwin32.h>
#ifndef DWMWA_USE_IMMERSIVE_DARK_MODE
#define DWMWA_USE_IMMERSIVE_DARK_MODE 20
#endif
#endif
/**
* SECTION: gimpdialog
@ -67,27 +75,28 @@ struct _GimpDialogPrivate
#define GET_PRIVATE(obj) (((GimpDialog *) (obj))->priv)
static void gimp_dialog_constructed (GObject *object);
static void gimp_dialog_dispose (GObject *object);
static void gimp_dialog_finalize (GObject *object);
static void gimp_dialog_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_dialog_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_dialog_constructed (GObject *object);
static void gimp_dialog_dispose (GObject *object);
static void gimp_dialog_finalize (GObject *object);
static void gimp_dialog_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_dialog_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_dialog_hide (GtkWidget *widget);
static gboolean gimp_dialog_delete_event (GtkWidget *widget,
GdkEventAny *event);
static void gimp_dialog_hide (GtkWidget *widget);
static gboolean gimp_dialog_delete_event (GtkWidget *widget,
GdkEventAny *event);
static void gimp_dialog_close (GtkDialog *dialog);
static void gimp_dialog_close (GtkDialog *dialog);
static void gimp_dialog_response (GtkDialog *dialog,
gint response_id);
static void gimp_dialog_response (GtkDialog *dialog,
gint response_id);
static void gimp_dialog_set_title_bar_theme (GtkWidget *dialog);
G_DEFINE_TYPE_WITH_PRIVATE (GimpDialog, gimp_dialog, GTK_TYPE_DIALOG)
@ -161,6 +170,12 @@ gimp_dialog_init (GimpDialog *dialog)
g_signal_connect (dialog, "response",
G_CALLBACK (gimp_dialog_response),
NULL);
#ifdef G_OS_WIN32
g_signal_connect (GTK_WIDGET (dialog), "map",
G_CALLBACK (gimp_dialog_set_title_bar_theme),
NULL);
#endif
}
static void
@ -656,6 +671,10 @@ gimp_dialog_run (GimpDialog *dialog)
gtk_window_present (GTK_WINDOW (dialog));
#ifdef G_OS_WIN32
gimp_dialog_set_title_bar_theme (GTK_WIDGET (dialog));
#endif
response_handler = g_signal_connect (dialog, "response",
G_CALLBACK (run_response_handler),
&ri);
@ -750,3 +769,46 @@ gimp_dialogs_show_help_button (gboolean show)
{
show_help_button = show ? TRUE : FALSE;
}
void
gimp_dialog_set_title_bar_theme (GtkWidget *dialog)
{
#ifdef G_OS_WIN32
HWND hwnd;
gboolean use_dark_mode = FALSE;
GdkWindow *window = NULL;
window = gtk_widget_get_window (GTK_WIDGET (dialog));
if (window)
{
GtkStyleContext *style;
GdkRGBA *color = NULL;
hwnd = (HWND) gdk_win32_window_get_handle (window);
/* Workaround since we don't have access to GimpGuiConfig.
* If the background color is below the threshold, then we're
* likely in dark mode.
*/
style = gtk_widget_get_style_context (GTK_WIDGET (dialog));
gtk_style_context_get (style, gtk_style_context_get_state (style),
GTK_STYLE_PROPERTY_BACKGROUND_COLOR, &color,
NULL);
if (color)
{
if (color->red < 0.5 && color->green < 0.5 && color->blue < 0.5)
use_dark_mode = TRUE;
gdk_rgba_free (color);
}
DwmSetWindowAttribute (hwnd, DWMWA_USE_IMMERSIVE_DARK_MODE,
&use_dark_mode, sizeof (use_dark_mode));
UpdateWindow (hwnd);
ShowWindow (hwnd, 5);
/* Toggle the window's visibility so the title bar change appears */
gdk_window_hide (window);
gdk_window_show (window);
}
#endif
}