Add key to pause process list updates

17 files changed, 103 insertions, 46 deletions

diff --git a/Action.c b/Action.c
index 4ea6fdfb..c4d71479 100644
--- a/Action.c
+++ b/Action.c
@@ -37,7 +37,7 @@ Object* Action_pickFromVector(State* st, Panel* list, int x, bool followProcess)
    Settings* settings = st->settings;
 
    int y = panel->y;
-   ScreenManager* scr = ScreenManager_new(0, header->height, 0, -1, HORIZONTAL, header, settings, false);
+   ScreenManager* scr = ScreenManager_new(0, header->height, 0, -1, HORIZONTAL, header, settings, st, false);
    scr->allowFocusChange = false;
    ScreenManager_add(scr, list, x - 1);
    ScreenManager_add(scr, panel, -1);
@@ -73,17 +73,17 @@ Object* Action_pickFromVector(State* st, Panel* list, int x, bool followProcess)
 
 // ----------------------------------------
 
-static void Action_runSetup(Settings* settings, Header* header, ProcessList* pl) {
-   ScreenManager* scr = ScreenManager_new(0, header->height, 0, -1, HORIZONTAL, header, settings, true);
-   CategoriesPanel* panelCategories = CategoriesPanel_new(scr, settings, header, pl);
+static void Action_runSetup(State* st) {
+   ScreenManager* scr = ScreenManager_new(0, st->header->height, 0, -1, HORIZONTAL, st->header, st->settings, st, true);
+   CategoriesPanel* panelCategories = CategoriesPanel_new(scr, st->settings, st->header, st->pl);
    ScreenManager_add(scr, (Panel*) panelCategories, 16);
    CategoriesPanel_makeMetersPage(panelCategories);
    Panel* panelFocus;
    int ch;
    ScreenManager_run(scr, &panelFocus, &ch);
    ScreenManager_delete(scr);
-   if (settings->changed) {
-      Header_writeBackToSettings(header);
+   if (st->settings->changed) {
+      Header_writeBackToSettings(st->header);
    }
 }
 
@@ -168,6 +168,8 @@ static Htop_Reaction sortBy(State* st) {
       reaction |= Action_setSortKey(st->settings, field->key);
    }
    Object_delete(sortPanel);
+   if (st->pauseProcessUpdate)
+      ProcessList_sort(st->pl);
    return reaction | HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
 }
 
@@ -346,7 +348,7 @@ Htop_Reaction Action_follow(State* st) {
 }
 
 static Htop_Reaction actionSetup(State* st) {
-   Action_runSetup(st->settings, st->header, st->pl);
+   Action_runSetup(st);
    // TODO: shouldn't need this, colors should be dynamic
    int headerHeight = Header_calculateHeight(st->header);
    Panel_move(st->panel, 0, headerHeight);
@@ -392,6 +394,11 @@ static Htop_Reaction actionRedraw(ATTR_UNUSED State *st) {
    return HTOP_REFRESH | HTOP_REDRAW_BAR;
 }
 
+static Htop_Reaction actionTogglePauseProcessUpdate(State *st) {
+   st->pauseProcessUpdate = !st->pauseProcessUpdate;
+   return HTOP_REFRESH | HTOP_REDRAW_BAR;
+}
+
 static const struct { const char* key; const char* info; } helpLeft[] = {
    { .key = " Arrows: ", .info = "scroll process list" },
    { .key = " Digits: ", .info = "incremental PID search" },
@@ -399,6 +406,7 @@ static const struct { const char* key; const char* info; } helpLeft[] = {
    { .key = "   F4 \\: ",.info = "incremental name filtering" },
    { .key = "   F5 t: ", .info = "tree view" },
    { .key = "      p: ", .info = "toggle program path" },
+   { .key = "      Z: ", .info = "pause/resume process updates" },
    { .key = "      u: ", .info = "show processes of a single user" },
    { .key = "      H: ", .info = "hide/show user process threads" },
    { .key = "      K: ", .info = "hide/show kernel threads" },
@@ -491,12 +499,12 @@ static Htop_Reaction actionHelp(State* st) {
    for (int i = 0; helpLeft[i].key;  i++) { mvaddstr(9+i, 0,  helpLeft[i].key); }
    for (int i = 0; helpRight[i].key; i++) { mvaddstr(9+i, 40, helpRight[i].key); }
    attrset(CRT_colors[PROCESS_THREAD]);
-   mvaddstr(16, 32, "threads");
-   mvaddstr(17, 26, "threads");
+   mvaddstr(17, 32, "threads");
+   mvaddstr(18, 26, "threads");
    attrset(CRT_colors[DEFAULT_COLOR]);
 
    attrset(CRT_colors[HELP_BOLD]);
-   mvaddstr(23,0, "Press any key to return.");
+   mvaddstr(24,0, "Press any key to return.");
    attrset(CRT_colors[DEFAULT_COLOR]);
    refresh();
    CRT_readKey();
@@ -596,4 +604,5 @@ void Action_setBindings(Htop_Action* keys) {
    keys['c'] = actionTagAllChildren;
    keys['e'] = actionShowEnvScreen;
    keys['w'] = actionShowCommandScreen;
+   keys['Z'] = actionTogglePauseProcessUpdate;
 }
diff --git a/Action.h b/Action.h
index 4f85b481..40300ed4 100644
--- a/Action.h
+++ b/Action.h
@@ -30,6 +30,7 @@ typedef struct State_ {
    ProcessList* pl;
    Panel* panel;
    Header* header;
+   bool pauseProcessUpdate;
 } State;
 
 typedef Htop_Reaction (*Htop_Action)(State* st);
diff --git a/AffinityPanel.c b/AffinityPanel.c
index 0cddd079..82ac12e5 100644
--- a/AffinityPanel.c
+++ b/AffinityPanel.c
@@ -160,7 +160,7 @@ static void AffinityPanel_update(AffinityPanel* this, bool keepSelected) {
    Panel* super = (Panel*) this;
 
    FunctionBar_setLabel(super->currentBar, KEY_F(3), this->topoView ? "Collapse/Expand" : "");
-   FunctionBar_draw(super->currentBar, NULL);
+   FunctionBar_draw(super->currentBar);
 
    int oldSelected = Panel_getSelectedIndex(super);
    Panel_prune(super);
diff --git a/AvailableMetersPanel.c b/AvailableMetersPanel.c
index 812d1f3d..b51a9e9f 100644
--- a/AvailableMetersPanel.c
+++ b/AvailableMetersPanel.c
@@ -29,7 +29,7 @@ static inline void AvailableMetersPanel_addMeter(Header* header, Panel* panel, c
    Panel_add(panel, (Object*) Meter_toListItem(meter, false));
    Panel_setSelected(panel, Panel_size(panel) - 1);
    MetersPanel_setMoving((MetersPanel*)panel, true);
-   FunctionBar_draw(panel->currentBar, NULL);
+   FunctionBar_draw(panel->currentBar);
 }
 
 static HandlerResult AvailableMetersPanel_eventHandler(Panel* super, int ch) {
diff --git a/CRT.c b/CRT.c
index a9f99545..9159450b 100644
--- a/CRT.c
+++ b/CRT.c
@@ -87,6 +87,7 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PANEL_SELECTION_FOLLOW] = ColorPair(Black,Yellow),
       [PANEL_SELECTION_UNFOCUS] = ColorPair(Black,White),
       [FAILED_SEARCH] = ColorPair(Red,Cyan),
+      [PAUSED] = A_BOLD | ColorPair(Yellow,Cyan),
       [UPTIME] = A_BOLD | ColorPair(Cyan,Black),
       [BATTERY] = A_BOLD | ColorPair(Cyan,Black),
       [LARGE_NUMBER] = A_BOLD | ColorPair(Red,Black),
@@ -162,6 +163,7 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PANEL_SELECTION_FOLLOW] = A_REVERSE,
       [PANEL_SELECTION_UNFOCUS] = A_BOLD,
       [FAILED_SEARCH] = A_REVERSE | A_BOLD,
+      [PAUSED] = A_BOLD | A_REVERSE,
       [UPTIME] = A_BOLD,
       [BATTERY] = A_BOLD,
       [LARGE_NUMBER] = A_BOLD,
@@ -237,6 +239,7 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PANEL_SELECTION_FOLLOW] = ColorPair(Black,Yellow),
       [PANEL_SELECTION_UNFOCUS] = ColorPair(Blue,White),
       [FAILED_SEARCH] = ColorPair(Red,Cyan),
+      [PAUSED] = A_BOLD | ColorPair(Yellow,Cyan),
       [UPTIME] = ColorPair(Yellow,White),
       [BATTERY] = ColorPair(Yellow,White),
       [LARGE_NUMBER] = ColorPair(Red,White),
@@ -312,6 +315,7 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PANEL_SELECTION_FOLLOW] = ColorPair(Black,Yellow),
       [PANEL_SELECTION_UNFOCUS] = ColorPair(Blue,Black),
       [FAILED_SEARCH] = ColorPair(Red,Cyan),
+      [PAUSED] = A_BOLD | ColorPair(Yellow,Cyan),
       [UPTIME] = ColorPair(Yellow,Black),
       [BATTERY] = ColorPair(Yellow,Black),
       [LARGE_NUMBER] = ColorPair(Red,Black),
@@ -387,6 +391,7 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PANEL_SELECTION_FOLLOW] = ColorPair(Black,Yellow),
       [PANEL_SELECTION_UNFOCUS] = A_BOLD | ColorPair(Yellow,Blue),
       [FAILED_SEARCH] = ColorPair(Red,Cyan),
+      [PAUSED] = A_BOLD | ColorPair(Yellow,Cyan),
       [UPTIME] = A_BOLD | ColorPair(Yellow,Blue),
       [BATTERY] = A_BOLD | ColorPair(Yellow,Blue),
       [LARGE_NUMBER] = A_BOLD | ColorPair(Red,Blue),
@@ -461,7 +466,8 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PANEL_SELECTION_FOCUS] = ColorPair(Black,Cyan),
       [PANEL_SELECTION_FOLLOW] = ColorPair(Black,Yellow),
       [PANEL_SELECTION_UNFOCUS] = ColorPair(Black,White),
-      [FAILED_SEARCH] = ColorPair(Red,Cyan),
+      [FAILED_SEARCH] = ColorPair(Red,Green),
+      [PAUSED] = A_BOLD | ColorPair(Yellow,Green),
       [UPTIME] = ColorPair(Green,Black),
       [BATTERY] = ColorPair(Green,Black),
       [LARGE_NUMBER] = A_BOLD | ColorPair(Red,Black),
diff --git a/CRT.h b/CRT.h
index e729fb3c..629a8097 100644
--- a/CRT.h
+++ b/CRT.h
@@ -43,6 +43,7 @@ typedef enum ColorElements_ {
    FUNCTION_BAR,
    FUNCTION_KEY,
    FAILED_SEARCH,
+   PAUSED,
    PANEL_HEADER_FOCUS,
    PANEL_HEADER_UNFOCUS,
    PANEL_SELECTION_FOCUS,
diff --git a/ColorsPanel.c b/ColorsPanel.c
index 75d3e654..917be98c 100644
--- a/ColorsPanel.c
+++ b/ColorsPanel.c
@@ -68,7 +68,7 @@ static HandlerResult ColorsPanel_eventHandler(Panel* super, int ch) {
       clear();
       Panel* menu = (Panel*) Vector_get(this->scr->panels, 0);
       Header_draw(header);
-      FunctionBar_draw(super->currentBar, NULL);
+      FunctionBar_draw(super->currentBar);
       RichString_setAttr(&(super->header), CRT_colors[PANEL_HEADER_FOCUS]);
       RichString_setAttr(&(menu->header), CRT_colors[PANEL_HEADER_UNFOCUS]);
       ScreenManager_resize(this->scr, this->scr->x1, header->height, this->scr->x2, this->scr->y2);
diff --git a/FunctionBar.c b/FunctionBar.c
index df1fab8f..c67e613c 100644
--- a/FunctionBar.c
+++ b/FunctionBar.c
@@ -24,6 +24,8 @@ static int FunctionBar_FEvents[] = {KEY_F(1), KEY_F(2), KEY_F(3), KEY_F(4), KEY_
 static const char* const FunctionBar_EnterEscKeys[] = {"Enter", "Esc", NULL};
 static const int FunctionBar_EnterEscEvents[] = {13, 27};
 
+static int currentLen = 0;
+
 FunctionBar* FunctionBar_newEnterEsc(const char* enter, const char* esc) {
    const char* functions[] = {enter, esc, NULL};
    return FunctionBar_new(functions, FunctionBar_EnterEscKeys, FunctionBar_EnterEscEvents);
@@ -53,7 +55,7 @@ FunctionBar* FunctionBar_new(const char* const* functions, const char* const* ke
       this->staticData = true;
       this->keys.constKeys = FunctionBar_FKeys;
       this->events = FunctionBar_FEvents;
-      this->size = 10;
+      this->size = ARRAYSIZE(FunctionBar_FEvents);
    }
    return this;
 }
@@ -83,11 +85,11 @@ void FunctionBar_setLabel(FunctionBar* this, int event, const char* text) {
    }
 }
 
-void FunctionBar_draw(const FunctionBar* this, char* buffer) {
-   FunctionBar_drawAttr(this, buffer, CRT_colors[FUNCTION_BAR]);
+void FunctionBar_draw(const FunctionBar* this) {
+   FunctionBar_drawExtra(this, NULL, -1, false);
 }
 
-void FunctionBar_drawAttr(const FunctionBar* this, char* buffer, int attr) {
+void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor) {
    attrset(CRT_colors[FUNCTION_BAR]);
    mvhline(LINES-1, 0, ' ', COLS);
    int x = 0;
@@ -99,15 +101,36 @@ void FunctionBar_drawAttr(const FunctionBar* this, char* buffer, int attr) {
       mvaddstr(LINES-1, x, this->functions[i]);
       x += strlen(this->functions[i]);
    }
+
    if (buffer) {
-      attrset(attr);
+      if (attr == -1)
+         attrset(CRT_colors[FUNCTION_BAR]);
+      else
+         attrset(attr);
       mvaddstr(LINES-1, x, buffer);
-      CRT_cursorX = x + strlen(buffer);
+      attrset(CRT_colors[RESET_COLOR]);
+      x += strlen(buffer);
+   }
+
+   if (setCursor) {
+      CRT_cursorX = x;
       curs_set(1);
    } else {
       curs_set(0);
    }
+
+   currentLen = x;
+}
+
+void FunctionBar_append(const char* buffer, int attr) {
+   if (attr == -1)
+      attrset(CRT_colors[FUNCTION_BAR]);
+   else
+      attrset(attr);
+   mvaddstr(LINES-1, currentLen, buffer);
    attrset(CRT_colors[RESET_COLOR]);
+
+   currentLen += strlen(buffer);
 }
 
 int FunctionBar_synthesizeEvent(const FunctionBar* this, int pos) {
diff --git a/FunctionBar.h b/FunctionBar.h
index c650c1a4..925e323b 100644
--- a/FunctionBar.h
+++ b/FunctionBar.h
@@ -28,9 +28,11 @@ void FunctionBar_delete(FunctionBar* this);
 
 void FunctionBar_setLabel(FunctionBar* this, int event, const char* text);
 
-void FunctionBar_draw(const FunctionBar* this, char* buffer);
+void FunctionBar_draw(const FunctionBar* this);
 
-void FunctionBar_drawAttr(const FunctionBar* this, char* buffer, int attr);
+void FunctionBar_drawExtra(const FunctionBar* this, const char* buffer, int attr, bool setCursor);
+
+void FunctionBar_append(const char* buffer, int attr);
 
 int FunctionBar_synthesizeEvent(const FunctionBar* this, int pos);
 
diff --git a/IncSet.c b/IncSet.c
index 3e3a1b99..9dda3ce1 100644
--- a/IncSet.c
+++ b/IncSet.c
@@ -95,10 +95,11 @@ static bool search(IncMode* mode, Panel* panel, IncMode_GetPanelValue getPanelVa
          break;
       }
    }
-   if (found)
-      FunctionBar_draw(mode->bar, mode->buffer);
-   else
-      FunctionBar_drawAttr(mode->bar, mode->buffer, CRT_colors[FAILED_SEARCH]);
+
+   FunctionBar_drawExtra(mode->bar,
+                         mode->buffer,
+                         found ? -1 : CRT_colors[FAILED_SEARCH],
+                         true);
    return found;
 }
 
@@ -177,7 +178,7 @@ bool IncSet_handleKey(IncSet* this, int ch, Panel* panel, IncMode_GetPanelValue
       }
       this->active = NULL;
       Panel_setDefaultBar(panel);
-      FunctionBar_draw(this->defaultBar, NULL);
+      FunctionBar_draw(this->defaultBar);
       doSearch = false;
    }
    if (doSearch) {
@@ -198,15 +199,15 @@ const char* IncSet_getListItemValue(Panel* panel, int i) {
 
 void IncSet_activate(IncSet* this, IncType type, Panel* panel) {
    this->active = &(this->modes[type]);
-   FunctionBar_draw(this->active->bar, this->active->buffer);
+   FunctionBar_drawExtra(this->active->bar, this->active->buffer, -1, true);
    panel->currentBar = this->active->bar;
 }
 
-void IncSet_drawBar(IncSet* this) {
+void IncSet_drawBar(const IncSet* this) {
    if (this->active) {
-      FunctionBar_draw(this->active->bar, this->active->buffer);
+      FunctionBar_drawExtra(this->active->bar, this->active->buffer, -1, true);
    } else {
-      FunctionBar_draw(this->defaultBar, NULL);
+      FunctionBar_draw(this->defaultBar);
    }
 }
 
diff --git a/IncSet.h b/IncSet.h
index 30b63665..f0589747 100644
--- a/IncSet.h
+++ b/IncSet.h
@@ -54,7 +54,7 @@ const char* IncSet_getListItemValue(Panel* panel, int i);
 
 void IncSet_activate(IncSet* this, IncType type, Panel* panel);
 
-void IncSet_drawBar(IncSet* this);
+void IncSet_drawBar(const IncSet* this);
 
 int IncSet_synthesizeEvent(IncSet* this, int x);
 
diff --git a/MainPanel.c b/MainPanel.c
index 2c89a073..48d869ff 100644
--- a/MainPanel.c
+++ b/MainPanel.c
@@ -92,6 +92,8 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
    if (reaction & HTOP_REDRAW_BAR) {
       MainPanel_updateTreeFunctions(this, this->state->settings->treeView);
       IncSet_drawBar(this->inc);
+      if (this->state->pauseProcessUpdate)
+         FunctionBar_append("PAUSED", CRT_colors[PAUSED]);
    }
    if (reaction & HTOP_UPDATE_PANELHDR) {
       ProcessList_printHeader(this->state->pl, Panel_getHeader(super));
diff --git a/MetersPanel.c b/MetersPanel.c
index 36cc8f45..89c54e0b 100644
--- a/MetersPanel.c
+++ b/MetersPanel.c
@@ -55,7 +55,7 @@ void MetersPanel_setMoving(MetersPanel* this, bool moving) {
       Panel_setSelectionColor(super, CRT_colors[PANEL_SELECTION_FOLLOW]);
       super->currentBar = Meters_movingBar;
    }
-   FunctionBar_draw(this->super.currentBar, NULL);
+   FunctionBar_draw(this->super.currentBar);
 }
 
 static inline bool moveToNeighbor(MetersPanel* this, MetersPanel* neighbor, int selected) {
diff --git a/ScreenManager.c b/ScreenManager.c
index 91ad47f8..4766e069 100644
--- a/ScreenManager.c
+++ b/ScreenManager.c
@@ -6,10 +6,12 @@ in the source distribution for its full text.
 */
 
 #include "ScreenManager.h"
-#include "ProcessList.h"
 
-#include "Object.h"
 #include "CRT.h"
+#include "MainPanel.h"
+#include "Object.h"
+#include "ProcessList.h"
+
 
 #include <assert.h>
 #include <time.h>
@@ -17,7 +19,7 @@ in the source distribution for its full text.
 #include <stdbool.h>
 
 
-ScreenManager* ScreenManager_new(int x1, int y1, int x2, int y2, Orientation orientation, Header* header, const Settings* settings, bool owner) {
+ScreenManager* ScreenManager_new(int x1, int y1, int x2, int y2, Orientation orientation, Header* header, const Settings* settings, const State* state, bool owner) {
    ScreenManager* this;
    this = xMalloc(sizeof(ScreenManager));
    this->x1 = x1;
@@ -29,6 +31,7 @@ ScreenManager* ScreenManager_new(int x1, int y1, int x2, int y2, Orientation ori
    this->panelCount = 0;
    this->header = header;
    this->settings = settings;
+   this->state = state;
    this->owner = owner;
    this->allowFocusChange = true;
    return this;
@@ -101,7 +104,7 @@ static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTi
    *timedOut = (newTime - *oldTime > this->settings->delay);
    *rescan = *rescan || *timedOut;
    if (newTime < *oldTime) *rescan = true; // clock was adjusted?
-   if (*rescan) {
+   if (*rescan && !this->state->pauseProcessUpdate) {
       *oldTime = newTime;
       ProcessList_scan(pl);
       if (*sortTimeout == 0 || this->settings->treeView) {
@@ -128,8 +131,11 @@ static void ScreenManager_drawPanels(ScreenManager* this, int focus) {
    }
 }
 
-static Panel* setCurrentPanel(Panel* panel) {
-   FunctionBar_draw(panel->currentBar, NULL);
+static Panel* setCurrentPanel(const ScreenManager* this, Panel* panel) {
+   FunctionBar_draw(panel->currentBar);
+   if (panel == this->state->panel && this->state->pauseProcessUpdate)
+      FunctionBar_append("PAUSED", CRT_colors[PAUSED]);
+
    return panel;
 }
 
@@ -137,7 +143,7 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
    bool quit = false;
    int focus = 0;
 
-   Panel* panelFocus = setCurrentPanel((Panel*) Vector_get(this->panels, focus));
+   Panel* panelFocus = setCurrentPanel(this, (Panel*) Vector_get(this->panels, focus));
 
    double oldTime = 0.0;
 
@@ -183,7 +189,7 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
                            ch = KEY_MOUSE;
                            if (panel == panelFocus || this->allowFocusChange) {
                               focus = i;
-                              panelFocus = setCurrentPanel(panel);
+                              panelFocus = setCurrentPanel(this, panel);
                               Object* oldSelection = Panel_getSelected(panel);
                               Panel_setSelected(panel, mevent.y - panel->y + panel->scrollV - 1);
                               if (Panel_getSelected(panel) == oldSelection) {
@@ -259,7 +265,7 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
          tryLeft:
          if (focus > 0)
             focus--;
-         panelFocus = setCurrentPanel((Panel*) Vector_get(this->panels, focus));
+         panelFocus = setCurrentPanel(this, (Panel*) Vector_get(this->panels, focus));
          if (Panel_size(panelFocus) == 0 && focus > 0)
             goto tryLeft;
          break;
@@ -274,7 +280,7 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
          tryRight:
          if (focus < this->panelCount - 1)
             focus++;
-         panelFocus = setCurrentPanel((Panel*) Vector_get(this->panels, focus));
+         panelFocus = setCurrentPanel(this, (Panel*) Vector_get(this->panels, focus));
          if (Panel_size(panelFocus) == 0 && focus < this->panelCount - 1)
             goto tryRight;
          break;
diff --git a/ScreenManager.h b/ScreenManager.h
index 722fb7f2..ad312930 100644
--- a/ScreenManager.h
+++ b/ScreenManager.h
@@ -7,9 +7,10 @@ Released under the GNU GPLv2, see the COPYING file
 in the source distribution for its full text.
 */
 
+#include "Action.h"
 #include "Header.h"
-#include "Settings.h"
 #include "Panel.h"
+#include "Settings.h"
 #include "Vector.h"
 
 typedef enum Orientation_ {
@@ -27,11 +28,12 @@ typedef struct ScreenManager_ {
    int panelCount;
    Header* header;
    const Settings* settings;
+   const State* state;
    bool owner;
    bool allowFocusChange;
 } ScreenManager;
 
-ScreenManager* ScreenManager_new(int x1, int y1, int x2, int y2, Orientation orientation, Header* header, const Settings* settings, bool owner);
+ScreenManager* ScreenManager_new(int x1, int y1, int x2, int y2, Orientation orientation, Header* header, const Settings* settings, const State* state, bool owner);
 
 void ScreenManager_delete(ScreenManager* this);
 
diff --git a/htop.1.in b/htop.1.in
index cd5562b6..3e95c201 100644
--- a/htop.1.in
+++ b/htop.1.in
@@ -209,6 +209,9 @@ userspace processes in the process list. (This is a toggle key.)
 .B p
 Show full paths to running programs, where applicable. (This is a toggle key.)
 .TP
+.B Z
+Pause/resume process updates.
+.TP
 .B Ctrl-L
 Refresh: redraw screen and recalculate values.
 .TP
diff --git a/htop.c b/htop.c
index 8d17de9b..44182ae1 100644
--- a/htop.c
+++ b/htop.c
@@ -283,6 +283,7 @@ int main(int argc, char** argv) {
       .pl = pl,
       .panel = (Panel*) panel,
       .header = header,
+      .pauseProcessUpdate = false,
    };
 
    MainPanel_setState(panel, &state);
@@ -290,7 +291,7 @@ int main(int argc, char** argv) {
       setCommFilter(&state, &(flags.commFilter));
    }
 
-   ScreenManager* scr = ScreenManager_new(0, header->height, 0, -1, HORIZONTAL, header, settings, true);
+   ScreenManager* scr = ScreenManager_new(0, header->height, 0, -1, HORIZONTAL, header, settings, &state, true);
    ScreenManager_add(scr, (Panel*) panel, -1);
 
    ProcessList_scan(pl);