[geany/geany] 018b83: Use themed title bar on Windows - Commits

5 Feb 2025


      Branch:      refs/heads/master
Author:      Jiří Techet techet@gmail.com
Committer:   Jiří Techet techet@gmail.com
Date:        Wed, 05 Feb 2025 22:48:36 UTC
Commit:      018b83e4fd4e286d873984a976acb587c5ef4aea
             https://github.com/geany/geany/commit/018b83e4fd4e286d873984a976acb587c5ef4a...
Log Message:
-----------
Use themed title bar on Windows
Based on a patch from @GabrielFrigo4. Thanks!
Modified to connect to the realized signal using
a patch from Colomban Wendling. Thanks!
Modified Paths:
--------------
    src/search.c
    src/ui_utils.c
    src/win32.c
    src/win32.h
Modified: src/search.c
13 lines changed, 13 insertions(+), 0 deletions(-)
===================================================================
@@ -44,6 +44,7 @@
 #include "toolbar.h"
 #include "ui_utils.h"
 #include "utils.h"
+#include "win32.h"
#include <unistd.h>
 #include <string.h>
@@ -547,6 +548,10 @@ static void create_find_dialog(void)
    	GTK_BUTTON_BOX(bbox));
    gtk_container_add(GTK_CONTAINER(exp), bbox);
    gtk_container_add(GTK_CONTAINER(vbox), exp);
+
+#ifdef G_OS_WIN32
+	win32_update_titlebar_theme(find_dlg.dialog);
+#endif
 }
@@ -731,6 +736,10 @@ static void create_replace_dialog(void)
    	GTK_BUTTON_BOX(bbox));
    gtk_container_add(GTK_CONTAINER(exp), bbox);
    gtk_container_add(GTK_CONTAINER(vbox), exp);
+
+#ifdef G_OS_WIN32
+		win32_update_titlebar_theme(replace_dlg.dialog);
+#endif
 }
@@ -1029,6 +1038,10 @@ static void create_fif_dialog(void)
    		G_CALLBACK(on_find_in_files_dialog_response), NULL);
    g_signal_connect(fif_dlg.dialog, "delete-event",
    		G_CALLBACK(gtk_widget_hide_on_delete), NULL);
+
+#ifdef G_OS_WIN32
+		win32_update_titlebar_theme(fif_dlg.dialog);
+#endif
 }
Modified: src/ui_utils.c
5 lines changed, 5 insertions(+), 0 deletions(-)
===================================================================
@@ -2521,6 +2521,11 @@ void ui_init_builder(void)
widget = GTK_WIDGET(iter->data);
+#ifdef G_OS_WIN32
+		if (GTK_IS_WINDOW(widget))
+			win32_update_titlebar_theme(widget);
+#endif
+
    	name = ui_guess_object_name(G_OBJECT(widget));
    	if (! name)
    	{
Modified: src/win32.c
38 lines changed, 38 insertions(+), 0 deletions(-)
===================================================================
@@ -53,12 +53,17 @@
#include <windows.h>
 #include <commdlg.h>
+#include <dwmapi.h>
 #include <shellapi.h>
 #include <shlobj.h>
#include <glib/gstdio.h>
 #include <gdk/gdkwin32.h>
+#ifndef DWMWA_USE_IMMERSIVE_DARK_MODE
+#define DWMWA_USE_IMMERSIVE_DARK_MODE 20
+#endif
+
/* Little wrapper for _waccess(), returns errno or 0 if there was no error */
 gint win32_check_write_permission(const gchar *dir)
@@ -327,4 +332,37 @@ gchar *win32_get_user_config_dir(void)
    return g_build_filename(g_get_user_config_dir(), "geany", NULL);
 }
+
+static void on_update_titlebar_theme_realized(GtkWidget *widget, gpointer data)
+{
+	GdkWindow *gdk_window = gtk_widget_get_window(widget);
+
+	g_return_if_fail(gdk_window != NULL);
+
+	HWND hwnd = (HWND)gdk_win32_window_get_handle(gdk_window);
+	if (hwnd)
+	{
+		BOOL use_dark_mode = TRUE;
+		DwmSetWindowAttribute(hwnd, DWMWA_USE_IMMERSIVE_DARK_MODE, &use_dark_mode, sizeof(use_dark_mode));
+	}
+}
+
+/* Makes titlebar dark when using dark theme; call this before
+ * gtk_widget_show(window) to avoid titlebar color change */
+void win32_update_titlebar_theme(GtkWidget *window)
+{
+	const gchar *reg_path = "Software\Microsoft\Windows\CurrentVersion\Themes\Personalize";
+	gboolean is_light_theme = TRUE;
+	DWORD val;
+	DWORD data_size = sizeof(val);
+
+	g_return_if_fail(GTK_IS_WINDOW(window));
+
+	if (RegGetValueA(HKEY_CURRENT_USER, reg_path, "AppsUseLightTheme", RRF_RT_DWORD, NULL, &val, &data_size) == ERROR_SUCCESS)
+		is_light_theme = val;
+
+	if (!is_light_theme)
+		g_signal_connect(window, "realize", G_CALLBACK(on_update_titlebar_theme_realized), NULL);
+}
+
 #endif
Modified: src/win32.h
2 lines changed, 2 insertions(+), 0 deletions(-)
===================================================================
@@ -47,6 +47,8 @@ gchar *win32_expand_environment_variables(const gchar *str);
gchar *win32_get_user_config_dir(void);
+void win32_update_titlebar_theme(GtkWidget *window);
+
 G_END_DECLS
#endif /* G_OS_WIN32 */
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