add: configuration options and keybinds for the dual-scroller layout

config.conf

@@ -57,6 +57,7 @@ scroller_prefer_center=0
 edge_scroller_pointer_focus=1
 scroller_default_proportion_single=1.0
 scroller_proportion_preset=0.5,0.8,1.0
+dual_scroller_default_split_ratio=0.3
 
 # Master-Stack Layout Setting
 new_is_master=1
@@ -237,6 +238,10 @@ bind=CTRL+ALT,Down,resizewin,+0,+50
 bind=CTRL+ALT,Left,resizewin,-50,+0
 bind=CTRL+ALT,Right,resizewin,+50,+0
 
+# dual-scroller split adjustment (increase/decrease top row height)
+# bind=SUPER+SHIFT,Equal,adjust_dual_scroller_split,0.05
+# bind=SUPER+SHIFT,Minus,adjust_dual_scroller_split,-0.05
+
 # Mouse Button Bindings
 # NONE mode key only work in ov mode
 mousebind=SUPER,btn_left,moveresize,curmove

src/config/parse_config.h

@@ -200,6 +200,7 @@ typedef struct {
 	int scroller_focus_center;
 	int scroller_prefer_center;
 	int edge_scroller_pointer_focus;
+	float dual_scroller_default_split_ratio;
 	int focus_cross_monitor;
 	int exchange_cross_monitor;
 	int scratchpad_cross_monitor;
@@ -822,6 +823,9 @@ FuncType parse_func_name(char *func_name, Arg *arg, char *arg_value,
 	} else if (strcmp(func_name, "setmfact") == 0) {
 		func = setmfact;
 		(*arg).f = atof(arg_value);
+	} else if (strcmp(func_name, "adjust_dual_scroller_split") == 0) {
+		func = adjust_dual_scroller_split;
+		(*arg).f = atof(arg_value);
 	} else if (strcmp(func_name, "zoom") == 0) {
 		func = zoom;
 	} else if (strcmp(func_name, "exchange_client") == 0) {
@@ -1167,6 +1171,8 @@ void parse_option(Config *config, char *key, char *value) {
 		config->scroller_prefer_center = atoi(value);
 	} else if (strcmp(key, "edge_scroller_pointer_focus") == 0) {
 		config->edge_scroller_pointer_focus = atoi(value);
+	} else if (strcmp(key, "dual_scroller_default_split_ratio") == 0) {
+		config->dual_scroller_default_split_ratio = atof(value);
 	} else if (strcmp(key, "focus_cross_monitor") == 0) {
 		config->focus_cross_monitor = atoi(value);
 	} else if (strcmp(key, "exchange_cross_monitor") == 0) {
@@ -2634,6 +2640,8 @@ void override_config(void) {
 	edge_scroller_pointer_focus =
 		CLAMP_INT(config.edge_scroller_pointer_focus, 0, 1);
 	scroller_structs = CLAMP_INT(config.scroller_structs, 0, 1000);
+	dual_scroller_default_split_ratio =
+		CLAMP_FLOAT(config.dual_scroller_default_split_ratio, 0.1f, 0.9f);
 
 	// 主从布局设置
 	default_mfact = CLAMP_FLOAT(config.default_mfact, 0.1f, 0.9f);
@@ -2822,6 +2830,7 @@ void set_value_default() {
 	config.scroller_focus_center = scroller_focus_center;
 	config.scroller_prefer_center = scroller_prefer_center;
 	config.edge_scroller_pointer_focus = edge_scroller_pointer_focus;
+	config.dual_scroller_default_split_ratio = dual_scroller_default_split_ratio;
 	config.focus_cross_monitor = focus_cross_monitor;
 	config.exchange_cross_monitor = exchange_cross_monitor;
 	config.scratchpad_cross_monitor = scratchpad_cross_monitor;

src/config/preset.h

@@ -63,6 +63,7 @@ float scroller_default_proportion_single = 1.0;
 int scroller_ignore_proportion_single = 0;
 int scroller_focus_center = 0;
 int scroller_prefer_center = 0;
+float dual_scroller_default_split_ratio = 0.3;
 int focus_cross_monitor = 0;
 int focus_cross_tag = 0;
 int exchange_cross_monitor = 0;

src/dispatch/bind_declare.h

@@ -29,6 +29,7 @@ int switch_keyboard_layout(const Arg *arg);
 int setlayout(const Arg *arg);
 int switch_layout(const Arg *arg);
 int setmfact(const Arg *arg);
+int adjust_dual_scroller_split(const Arg *arg);
 int quit(const Arg *arg);
 int moveresize(const Arg *arg);
 int exchange_client(const Arg *arg);

src/dispatch/bind_define.h

@@ -326,6 +326,28 @@ int setmfact(const Arg *arg) {
 	return 0;
 }
 
+int adjust_dual_scroller_split(const Arg *arg) {
+	float new_ratio;
+
+	if (!arg || !selmon)
+		return 0;
+
+	// Check if we're in a dual-scroller layout
+	if (!is_row_layout(selmon))
+		return 0;
+
+	// Calculate new ratio: if arg->f < 1.0, treat as relative adjustment, otherwise as absolute value
+	new_ratio = arg->f < 1.0 ? dual_scroller_default_split_ratio + arg->f : arg->f - 1.0;
+
+	// Clamp the ratio between 0.1 and 0.9
+	if (new_ratio < 0.1 || new_ratio > 0.9)
+		return 0;
+
+	dual_scroller_default_split_ratio = new_ratio;
+	arrange(selmon, false);
+	return 0;
+}
+
 int killclient(const Arg *arg) {
 	Client *c = NULL;
 	c = selmon->sel;

src/layout/horizontal.h

@@ -455,8 +455,8 @@ void dual_scroller(Monitor *m) {
 		}
 	}
 
-	// Calculate row heights (30% top, 70% bottom)
+	// Calculate row heights using configurable split ratio
-	unsigned int top_row_height = (unsigned int)((m->w.height - 2 * cur_gappov - cur_gappiv) * 0.3);
+	unsigned int top_row_height = (unsigned int)((m->w.height - 2 * cur_gappov - cur_gappiv) * dual_scroller_default_split_ratio);
 	unsigned int bottom_row_height = m->w.height - 2 * cur_gappov - cur_gappiv - top_row_height;
 	unsigned int top_row_y = m->w.y + cur_gappov;
 	unsigned int bottom_row_y = top_row_y + top_row_height + cur_gappiv;