From 0ab1e4878f9e2b592032dc7c67ae8018293058f6 Mon Sep 17 00:00:00 2001
From: erdgeist <erdgeist@bauklotz.fritz.box>
Date: Sun, 9 Apr 2017 22:07:54 +0200
Subject: Extend short lines, if min and max is manually edited

---
 engine.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 46 insertions(+), 12 deletions(-)

diff --git a/engine.c b/engine.c
index 43892fb..0e8c34e 100644
--- a/engine.c
+++ b/engine.c
@@ -22,10 +22,11 @@ static void highlight_line(int value, int y, int max_x, uint32_t color);
 void
 engine_redraw()
 {
+        const char *config_hints[] = { "No", "Harfe", "File", "Edit" };
         char text[32];
-        char *config_hints[] = { "No", "Harfe", "File", "Edit" };
-        int i, MAX_X, MAX_Y, FONT_HEIGHT;
-        int height = g_max_y - g_min_y;
+        const int tos1 = g_midi_three_octave_split_1, tos2 = g_midi_three_octave_split_2;
+        const int height = g_max_y - g_min_y;
+        int i, x2, MAX_X, MAX_Y, FONT_HEIGHT;
 
         display_redraw();
         display_clear();
@@ -36,7 +37,6 @@ engine_redraw()
 
         if (height) {
                 int b = g_midi_three_octave_split_inverse;
-                int tos1 = g_midi_three_octave_split_1, tos2 = g_midi_three_octave_split_2;
                 display_text( b ? "+1" : "-1", 4, scale(g_min_y + tos1 * height / 200) + FONT_HEIGHT / 2, 0x007f7f7fff);
                 display_text(            " 0", 4, scale(g_min_y + (tos1 + tos2) * height / 200) + FONT_HEIGHT / 2, 0x007f7f7fff);
                 display_text( b ? "-1" : "+1", 4, scale(g_min_y + (tos2 / 2 + 50 ) * height / 100) + FONT_HEIGHT / 2, 0x007f7f7fff);
@@ -49,7 +49,6 @@ engine_redraw()
                 display_line_color(0, scale(g_min_y + tos1 * height / 100), MAX_X, scale(g_min_y + tos1 * height / 100), 0x00ff00ff);
                 display_line_color(0, scale(g_min_y + tos2 * height / 100), MAX_X, scale(g_min_y + tos2 * height / 100), 0x00ff00ff);
 
-
                 switch (g_selected_config) {
                         case sel_min_y:         highlight_line(g_min_y, g_min_y, MAX_X, 0xff00ffff); break;
                         case sel_max_y:         highlight_line(g_max_y, g_max_y, MAX_X, 0xff00ffff); break;
@@ -61,17 +60,28 @@ engine_redraw()
 
                 for (i = 0; i < g_string_count; ++i) {
                     LLine *l = &g_string_conf[i].line;
+                    LLine _l = g_string_conf[i].line; // Copy for extension
                     uint32_t color = ( ( i == g_selected_string ) ? 0xff00ffff : 0x00ffffffff );
                     uint32_t text_color = ( ( i == g_selected_string ) ? 0xff00ffff : 0x007f7f7fff );
+                    int extended = 0, center_y = g_min_y+height/2;
 
-                    int center_y = g_min_y+height/2;
-                    int x2 = l->p1.x;
-
-                    if (l->p1.x!=l->p0.x) {
-                        double m = (double)(l->p1.y-l->p0.y) / (double)(l->p1.x-l->p0.x);
-                        double _x2 = ((double)center_y) - (double)l->p0.y + m * (double)l->p0.x;
-                        x2 = (int)(_x2/m);
+                    if (_l.p0.y > g_min_y) {
+                        _l.p0.x = get_x_for_y(&_l.p0, &_l.p1, g_min_y);
+                        _l.p0.y = g_min_y;
+                        extended = 1;
+                    }
+                    if (_l.p1.y < g_max_y) {
+                        _l.p1.x = get_x_for_y(&l->p0 /* Using unmodified original! */, &_l.p1, g_max_y);
+                        _l.p1.y = g_max_y;
+                        extended = 1;
                     }
+                    if (extended) {
+                        display_line_color(scale(_l.p0.x), scale(_l.p0.y), scale(_l.p1.x), scale(_l.p1.y), 0x007f3f00);
+                        display_circle_color(scale(_l.p0.x), scale(_l.p0.y), 4, 0x007f3f00);
+                        display_circle_color(scale(_l.p1.x), scale(_l.p1.y), 4, 0x007f3f00);
+                    }
+
+                    x2 = get_x_for_y(&l->p0,&l->p1,center_y);
 
                     if (g_string_conf[i].playing)
                         display_text(config_midi_note_to_string(g_string_conf[i].note+12*g_string_conf[i].octave), scale(x2-20), scale(center_y) + FONT_HEIGHT, text_color );
@@ -100,11 +110,29 @@ highlight_line(int value, int y, int max_x, uint32_t color) {
     display_line_color(max_x, scale(y+10), max_x-10, scale(y), color);
 
     display_rect_color(max_x/2-40, scale(y+20), 80, 40, 0xffffffff);
+    snprintf(text, sizeof(text), "%d", value);
     display_text(text, max_x/2-20, scale(y+20), 0);
 }
 
 void
 engine_select_config(ConfigSelect sel) {
+    // test if we have moved g_min_y or g_max_y and resize lines accordingly
+    if (sel == sel_none) {
+        int i;
+        for (i=0; i<g_string_count; ++i) {
+            LLine *l = &g_string_conf[i].line;
+            LLine _l = g_string_conf[i].line; // Copy for extension
+
+            if (l->p0.y > g_min_y) {
+                l->p0.x = get_x_for_y(&l->p0, &l->p1, g_min_y);
+                l->p0.y = g_min_y;
+            }
+            if (l->p1.y < g_max_y) {
+                l->p1.x = get_x_for_y(&_l.p0 /* Using unmodified original! */, &l->p1, g_max_y);
+                l->p1.y = g_max_y;
+            }
+        }
+    }
     g_selected_config = sel;
 }
 
@@ -112,6 +140,12 @@ ConfigSelect
 engine_change_selected(int off)
 {
     switch(g_selected_config) {
+        case sel_min_y:
+            g_min_y += off;
+            break;
+        case sel_max_y:
+            g_max_y += off;
+            break;
         case sel_3_oct_top:
             g_midi_three_octave_split_2 += off;
             if (g_midi_three_octave_split_2<0)   g_midi_three_octave_split_2 = 0;
-- 
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