From 00155154a75745e395d8d97c2764c0a8e85c149e Mon Sep 17 00:00:00 2001
From: Colin Clark <colin.clark@cclark.uk>
Date: Sun, 9 Apr 2023 17:02:16 +0100
Subject: [PATCH] Fix #1077: allow split view with user specified layout

https://github.com/BestImageViewer/geeqie/issues/1077

Additional layout - 3 horizontal panes
---
 doc/docbook/GuideMainWindowMenus.xml | 11 ++++++
 src/layout-image.cc                  | 51 ++++++++++++++++++++++++++++
 src/layout-util.cc                   |  2 ++
 src/typedefs.h                       |  1 +
 4 files changed, 65 insertions(+)

diff --git a/doc/docbook/GuideMainWindowMenus.xml b/doc/docbook/GuideMainWindowMenus.xml
index 68da9cc7..326fcc12 100644
--- a/doc/docbook/GuideMainWindowMenus.xml
+++ b/doc/docbook/GuideMainWindowMenus.xml
@@ -1371,6 +1371,17 @@
           <para>Splits main image view in two vertical panes.</para>
         </listitem>
       </varlistentry>
+      <varlistentry>
+        <term>
+          <menuchoice>
+            <guimenu>Split</guimenu>
+            <guimenuitem>Triple</guimenuitem>
+          </menuchoice>
+        </term>
+        <listitem>
+          <para>Splits main image view in three horizontal panes.</para>
+        </listitem>
+      </varlistentry>
       <varlistentry>
         <term>
           <menuchoice>
diff --git a/src/layout-image.cc b/src/layout-image.cc
index 7d79f494..5d22101e 100644
--- a/src/layout-image.cc
+++ b/src/layout-image.cc
@@ -2354,6 +2354,55 @@ GtkWidget *layout_image_setup_split_hv(LayoutWindow *lw, gboolean horizontal)
 
 }
 
+static GtkWidget *layout_image_setup_split_triple(LayoutWindow *lw)
+{
+	GtkWidget *hpaned1;
+	GtkWidget *hpaned2;
+	GtkAllocation allocation;
+	gint i;
+	gint pane_pos;
+
+	lw->split_mode = SPLIT_TRIPLE;
+
+	layout_image_setup_split_common(lw, 3);
+
+	gtk_widget_get_allocation(lw->utility_paned, &allocation);
+
+	hpaned1 = gtk_hpaned_new();
+	DEBUG_NAME(hpaned1);
+	hpaned2 = gtk_hpaned_new();
+	DEBUG_NAME(hpaned2);
+
+	if (lw->bar && gtk_widget_get_visible(lw->bar))
+		{
+		pane_pos = (gtk_paned_get_position(GTK_PANED(lw->utility_paned))) / 3;
+		}
+	else
+		{
+		pane_pos = allocation.width / 3;
+		}
+
+	gtk_paned_set_position(GTK_PANED(hpaned1), pane_pos);
+	gtk_paned_set_position(GTK_PANED(hpaned2), pane_pos);
+
+	gtk_paned_pack1(GTK_PANED(hpaned1), lw->split_images[0]->widget, TRUE, TRUE);
+	gtk_paned_pack1(GTK_PANED(hpaned2), lw->split_images[1]->widget, TRUE, TRUE);
+	gtk_paned_pack2(GTK_PANED(hpaned2), lw->split_images[2]->widget, TRUE, TRUE);
+	gtk_paned_pack2(GTK_PANED(hpaned1), hpaned2, TRUE, TRUE);
+
+	for (i = 0; i < 3; i++)
+		{
+		gtk_widget_show(lw->split_images[i]->widget);
+		}
+
+	gtk_widget_show(hpaned1);
+	gtk_widget_show(hpaned2);
+
+	lw->split_image_widget = hpaned1;
+
+	return lw->split_image_widget;
+}
+
 GtkWidget *layout_image_setup_split_quad(LayoutWindow *lw)
 {
 	GtkWidget *hpaned;
@@ -2401,6 +2450,8 @@ GtkWidget *layout_image_setup_split(LayoutWindow *lw, ImageSplitMode mode)
 			return layout_image_setup_split_hv(lw, TRUE);
 		case SPLIT_VERT:
 			return layout_image_setup_split_hv(lw, FALSE);
+		case SPLIT_TRIPLE:
+			return layout_image_setup_split_triple(lw);
 		case SPLIT_QUAD:
 			return layout_image_setup_split_quad(lw);
 		case SPLIT_NONE:
diff --git a/src/layout-util.cc b/src/layout-util.cc
index 53549d68..94451a93 100644
--- a/src/layout-util.cc
+++ b/src/layout-util.cc
@@ -2652,6 +2652,7 @@ static GtkToggleActionEntry menu_view_dir_toggle_entries[] = {
 static GtkRadioActionEntry menu_split_radio_entries[] = {
   { "SplitHorizontal",	NULL,			N_("_Horizontal"),			"E",			N_("Split panes horizontal."),			SPLIT_HOR },
   { "SplitVertical",	NULL,			N_("_Vertical"),			"U",			N_("Split panes vertical"),				SPLIT_VERT },
+  { "SplitTriple",	NULL,			N_("_Triple"),				NULL,			N_("Split panes triple"),				SPLIT_TRIPLE },
   { "SplitQuad",	NULL,			N_("_Quad"),				NULL,			N_("Split panes quad"),				SPLIT_QUAD },
   { "SplitSingle",	NULL,			N_("_Single"),				"Y",			N_("Single pane"),				SPLIT_NONE }
 };
@@ -2849,6 +2850,7 @@ static const gchar *menu_ui_description =
 "      <menu action='SplitMenu'>"
 "        <menuitem action='SplitHorizontal'/>"
 "        <menuitem action='SplitVertical'/>"
+"        <menuitem action='SplitTriple'/>"
 "        <menuitem action='SplitQuad'/>"
 "        <menuitem action='SplitSingle'/>"
 "        <separator/>"
diff --git a/src/typedefs.h b/src/typedefs.h
index 2c7e6b3c..191d437d 100644
--- a/src/typedefs.h
+++ b/src/typedefs.h
@@ -132,6 +132,7 @@ typedef enum {
 	SPLIT_NONE = 0,
 	SPLIT_VERT,
 	SPLIT_HOR,
+	SPLIT_TRIPLE,
 	SPLIT_QUAD,
 } ImageSplitMode;
 
-- 
2.20.1