PowerTOP UI navigation enhancement(v3).

This patch add more ui navigation features allowing for the scrolling of
PowerTop content for each tab. This is done by controlling the location
of the winpad, and refreshing the terminal window when needed. To do
this, the navigation keys have been updated as follows.

"Arrow Keys" now scroll the tab windows
"Page up/down" scroll tab windows up and down
"TAB" cycles the next window tab
"SHIFT+TAB" cycles the previous window tab
"ENTER" toggles tunables
"SPACE BAR" toggles tunables
"r KEY" refresh results and resets view of tab window.

Known issues:
There is no handler for terminal re-sizing. The workaround is to use "r
KEY" to refresh if terminal windows size is changed mid session.

4 files changed, 101 insertions, 41 deletions

diff --git a/src/cpu/abstract_cpu.cpp b/src/cpu/abstract_cpu.cpp
index 8b4c650..ebdc510 100644
--- a/src/cpu/abstract_cpu.cpp
+++ b/src/cpu/abstract_cpu.cpp
@@ -421,12 +421,6 @@ void abstract_cpu::validate(void)
 	for (i = 0; i < children.size(); i++) {
 
 		if (children[i]) {
-			if (my_time != children[i]->total_pstate_time())
-				printf("My (%i) time %llu is not the same as child (%i) time %llu\n",
-					first_cpu,
-					(unsigned long long)my_time,
-					children[i]->number,
-					(unsigned long long)children[i]->total_pstate_time());
 			children[i]->validate();
 		}
 	}
diff --git a/src/display.cpp b/src/display.cpp
index f48b53f..c76ba27 100644
--- a/src/display.cpp
+++ b/src/display.cpp
@@ -95,7 +95,7 @@ static int current_tab;
 
 void show_tab(unsigned int tab)
 {
-	WINDOW *win;
+	class tab_window *win;
 	unsigned int i;
 	int tab_pos = 17;
 	const char *c;
@@ -145,11 +145,11 @@ void show_tab(unsigned int tab)
 	wrefresh(tab_bar);
 	wrefresh(bottom_line);
 
-	win = get_ncurses_win(tab_names[tab]);
+	win = tab_windows[tab_names[tab]];
 	if (!win)
 		return;
 
-	prefresh(win, 0, 0, 1, 0, LINES - 3, COLS - 1);
+	prefresh(win->win, win->ypad_pos, win->xpad_pos, 1, 0, LINES - 3, COLS - 1);
 }
 
 WINDOW *get_ncurses_win(const char *name)
@@ -185,42 +185,41 @@ WINDOW *get_ncurses_win(const string &name)
 	return get_ncurses_win(name.c_str());
 }
 
-
-void show_next_tab(void)
+void show_prev_tab(void)
 {
-	class tab_window *w;
+       class tab_window *w;
 
-	if (!display)
-		return;
+       if (!display)
+               return;
+       w = tab_windows[tab_names[current_tab]];
+       if (w)
+               w->hide();
 
-	w = tab_windows[tab_names[current_tab]];
-	if (w)
-		w->hide();
+       current_tab --;
+       if (current_tab < 0)
+               current_tab = tab_names.size() - 1;
 
-	current_tab ++;
-	if (current_tab >= (int)tab_names.size())
-		current_tab = 0;
-
-	w = tab_windows[tab_names[current_tab]];
-	if (w)
-		w->expose();
+       w = tab_windows[tab_names[current_tab]];
+       if (w)
+               w->expose();
 
-	show_tab(current_tab);
+       show_tab(current_tab);
 }
 
-void show_prev_tab(void)
+void show_next_tab(void)
 {
 	class tab_window *w;
 
 	if (!display)
 		return;
+
 	w = tab_windows[tab_names[current_tab]];
 	if (w)
 		w->hide();
 
-	current_tab --;
-	if (current_tab < 0)
-		current_tab = tab_names.size() - 1;
+	current_tab ++;
+	if (current_tab >= (int)tab_names.size())
+		current_tab = 0;
 
 	w = tab_windows[tab_names[current_tab]];
 	if (w)
@@ -241,8 +240,20 @@ void cursor_down(void)
 	class tab_window *w;
 
 	w = tab_windows[tab_names[current_tab]];
-	if (w)
-		w->cursor_down();
+	if (w) {
+		if (w->ypad_pos < 1000) {
+			if (tab_names[current_tab] == "Tunables") {
+		                if ((w->cursor_pos + 7) >= LINES) { 
+					prefresh(w->win, ++w->ypad_pos, w->xpad_pos, 
+						1, 0, LINES - 3, COLS - 1);
+				}			
+					w->cursor_down(); 
+			} else {
+				prefresh(w->win, ++w->ypad_pos, w->xpad_pos, 
+					1, 0, LINES - 3, COLS - 1);
+			}
+		}
+	}
 
 	show_cur_tab();
 }
@@ -253,12 +264,50 @@ void cursor_up(void)
 
 	w = tab_windows[tab_names[current_tab]];
 
-	if (w)
-		w->cursor_up();
-
+	if (w) {
+		w->cursor_up(); 
+		if(w->ypad_pos > 0) {
+			if (tab_names[current_tab] == "Tunables") {
+				prefresh(w->win, --w->ypad_pos, w->xpad_pos, 
+					1, 0, LINES - 3, COLS - 1);
+	                } else {
+				prefresh(w->win, --w->ypad_pos, w->xpad_pos, 
+					1, 0, LINES - 3, COLS - 1);
+			}
+		}
+	}
+	
 	show_cur_tab();
 }
 
+void cursor_left(void)
+{
+        class tab_window *w;
+
+	w = tab_windows[tab_names[current_tab]];
+	
+	if (w) {			
+		if (w->xpad_pos > 0) {
+			prefresh(w->win, w->ypad_pos,--w->xpad_pos, 
+				1, 0, LINES - 3, COLS - 1);
+		}
+	}
+}
+
+void cursor_right(void) 
+{
+        class tab_window *w;
+
+	w = tab_windows[tab_names[current_tab]];
+
+	if (w) {
+		if (w->xpad_pos < 1000) {
+			prefresh(w->win, w->ypad_pos, ++w->xpad_pos, 
+				1, 0, LINES - 3, COLS - 1);
+		}
+	}
+}
+
 void cursor_enter(void)
 {
 	class tab_window *w;
@@ -279,6 +328,8 @@ void window_refresh()
 	w = tab_windows[tab_names[current_tab]];
 
 	if (w) {
+		w->ypad_pos = 0;
+		w->xpad_pos = 0;
 		w->window_refresh();
 		w->repaint();
 	}
diff --git a/src/display.h b/src/display.h
index 33aaae1..b450f8b 100644
--- a/src/display.h
+++ b/src/display.h
@@ -41,6 +41,8 @@ extern void show_prev_tab(void);
 extern void show_cur_tab(void);
 extern void cursor_up(void);
 extern void cursor_down(void);
+extern void cursor_right(void);
+extern void cursor_left(void);
 extern void cursor_enter(void);
 extern void window_refresh(void);
 
@@ -48,10 +50,17 @@ class tab_window {
 public:
 	int cursor_pos;
 	int cursor_max;
+	short int xpad_pos, ypad_pos; 
 	WINDOW *win;
 
-	virtual void cursor_down(void) { if (cursor_pos < cursor_max ) cursor_pos++; repaint(); } ;
-	virtual void cursor_up(void) { if (cursor_pos > 0) cursor_pos--; repaint(); };
+	virtual void cursor_down(void) { 
+		if (cursor_pos < cursor_max ) cursor_pos++; repaint(); 
+	} ;
+	virtual void cursor_up(void) { 
+		if (cursor_pos > 0) cursor_pos--; repaint(); 
+	};
+	virtual void cursor_left(void) { };
+	virtual void cursor_right(void) { };
 
 	virtual void cursor_enter(void) { };
 	virtual void window_refresh() { };
diff --git a/src/main.cpp b/src/main.cpp
index cf47b4e..1815075 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -135,22 +135,28 @@ static void do_sleep(int seconds)
 		halfdelay(delta * 10);
 
 		c = getch();
-
 		switch (c) {
-		case KEY_NPAGE:
+		case 353: 
+			show_prev_tab();
+			break;
+		case 9:
+			show_next_tab(); 
+			break;
 		case KEY_RIGHT:
-			show_next_tab();
+			cursor_right(); 
 			break;
-		case KEY_PPAGE:
 		case KEY_LEFT:
-			show_prev_tab();
+			cursor_left(); 
 			break;
+		case KEY_NPAGE:
 		case KEY_DOWN:
 			cursor_down();
 			break;
+		case KEY_PPAGE:
 		case KEY_UP:
 			cursor_up();
 			break;
+		case 32:
 		case 10:
 			cursor_enter();
 			break;