Scaling support - scale by screen height (issue #656)

src/config.c

@@ -246,6 +246,8 @@ void add_entry(char *key, char *value)
     /* Background and border */
     if (strcmp(key, "scale_relative_to_dpi") == 0) {
         ui_scale_dpi_ref = atof(value);
+    } else if (strcmp(key, "scale_relative_to_screen_height") == 0) {
+        ui_scale_monitor_size_ref = atof(value);
     } else if (strcmp(key, "rounded") == 0) {
         // 'rounded' is the first parameter => alloc a new background
         if (backgrounds->len > 0) {

src/panel.c

@@ -80,6 +80,7 @@ GArray *backgrounds;
 GArray *gradients;
 
 double ui_scale_dpi_ref;
+double ui_scale_monitor_size_ref;
 
 Imlib_Image default_icon;
 char *default_font = NULL;
@@ -87,6 +88,7 @@ char *default_font = NULL;
 void default_panel()
 {
     ui_scale_dpi_ref = 0;
+    ui_scale_monitor_size_ref = 0;
     panels = NULL;
     num_panels = 0;
     default_icon = NULL;
@@ -225,6 +227,8 @@ void init_panel()
             p->scale = server.monitors[p->monitor].dpi / ui_scale_dpi_ref;
         else
             p->scale = 1;
+        if (ui_scale_monitor_size_ref > 0)
+            p->scale *= server.monitors[p->monitor].height / ui_scale_monitor_size_ref;
         fprintf(stderr, BLUE "tint2: panel %d uses scale %g " RESET "\n", i + 1, p->scale);
         if (!p->area.bg)
             p->area.bg = &g_array_index(backgrounds, Background, 0);

src/panel.h

@@ -96,6 +96,7 @@ extern double tracing_fps_threshold;
 extern gboolean debug_frames;
 extern gboolean debug_thumbnails;
 extern double ui_scale_dpi_ref;
+extern double ui_scale_monitor_size_ref;
 
 typedef struct Panel {
     Area area;

src/tint2conf/properties.c

@@ -22,7 +22,7 @@
 #include "gradient_gui.h"
 #include "strlcat.h"
 
-GtkWidget *scale_relative_to_dpi;
+GtkWidget *scale_relative_to_dpi, *scale_relative_to_screen_height;
 GtkWidget *panel_width, *panel_height, *panel_margin_x, *panel_margin_y, *panel_padding_x, *panel_padding_y,
     *panel_spacing;
 GtkWidget *panel_wm_menu, *panel_dock, *panel_autohide, *panel_autohide_show_time, *panel_autohide_hide_time,
@@ -614,6 +614,19 @@ void create_panel(GtkWidget *parent)
     gtk_table_attach(GTK_TABLE(table), scale_relative_to_dpi, col, col + 1, row, row + 1, GTK_FILL, 0, 0, 0);
     col++;
 
+    row++;
+    col = 2;
+    label = gtk_label_new(_("Scale relative to screen height"));
+    gtk_misc_set_alignment(GTK_MISC(label), 0, 0);
+    gtk_widget_show(label);
+    gtk_table_attach(GTK_TABLE(table), label, col, col + 1, row, row + 1, GTK_FILL, 0, 0, 0);
+    col++;
+
+    scale_relative_to_screen_height = gtk_spin_button_new_with_range(0, 9000, 1);
+    gtk_widget_show(scale_relative_to_screen_height);
+    gtk_table_attach(GTK_TABLE(table), scale_relative_to_screen_height, col, col + 1, row, row + 1, GTK_FILL, 0, 0, 0);
+    col++;
+
     change_paragraph(parent);
 
     label = gtk_label_new(_("<b>Appearance</b>"));

src/tint2conf/properties.h

@@ -9,7 +9,7 @@
 #include "../launcher/icon-theme-common.h"
 
 // panel
-extern GtkWidget *scale_relative_to_dpi;
+extern GtkWidget *scale_relative_to_dpi, *scale_relative_to_screen_height;
 extern GtkWidget *panel_width, *panel_height, *panel_margin_x, *panel_margin_y, *panel_padding_x, *panel_padding_y,
     *panel_spacing;
 extern GtkWidget *panel_wm_menu, *panel_dock, *panel_autohide, *panel_autohide_show_time, *panel_autohide_hide_time,

src/tint2conf/properties_rw.c

@@ -381,6 +381,9 @@ void config_write_panel(FILE *fp)
     fprintf(fp,
             "scale_relative_to_dpi = %d\n",
             (int)gtk_spin_button_get_value(GTK_SPIN_BUTTON(scale_relative_to_dpi)));
+    fprintf(fp,
+            "scale_relative_to_screen_height = %d\n",
+            (int)gtk_spin_button_get_value(GTK_SPIN_BUTTON(scale_relative_to_screen_height)));
 
     fprintf(fp, "\n");
 }
@@ -1115,6 +1118,9 @@ void add_entry(char *key, char *value)
     if (strcmp(key, "scale_relative_to_dpi") == 0) {
         extract_values(value, &value1, &value2, &value3);
         gtk_spin_button_set_value(GTK_SPIN_BUTTON(scale_relative_to_dpi), atoi(value1));
+    } else if (strcmp(key, "scale_relative_to_screen_height") == 0) {
+        extract_values(value, &value1, &value2, &value3);
+        gtk_spin_button_set_value(GTK_SPIN_BUTTON(scale_relative_to_screen_height), atoi(value1));
     } else if (strcmp(key, "gradient") == 0) {
         finalize_gradient();
         GradientConfigType t;