[Add] Option to enable/disable buttons.

dat/missions/cargo.lua

@@ -15,8 +15,6 @@ function create()
                           planet, carg_mass, carg_type, "SOMEDAY"))
   misn_reward = carg_mass * 1000 + rnd.int(0, 5000)
   misn.setReward(string.format("%d Scred", misn_reward))
-
-
 end
 
 function accept()
@@ -24,7 +22,7 @@ function accept()
   toolkit.msg("Mission Accepted",
         string.format("The workers load the %d tons of %s onto your ship.",
         carg_mass, carg_type))
-
+  hook.land("land")
 end
 
 function land()

src/land.c

@@ -850,6 +850,8 @@ static void misn_update(char* str) {
     window_modifyText(secondary_wid, "txtReward", "None");
     window_modifyText(secondary_wid, "txtDesc",
                       "There are no missions available here.");
+
+    window_disableButton(secondary_wid, "btnAcceptMission");
     return;
   }
   for(i = 0; i < mission_ncomputer; i++)
@@ -857,6 +859,7 @@ static void misn_update(char* str) {
           (strcmp(active_misn, mission_computer[i].title)==0)) {
       window_modifyText(secondary_wid, "txtReward", mission_computer[i].reward);
       window_modifyText(secondary_wid, "txtDesc", mission_computer[i].desc);
+      window_enableButton(secondary_wid, "btnAcceptMission");
       return;
     }
 }

src/mission.c

@@ -51,7 +51,7 @@ static int mission_init(Mission* mission, MissionData* misn) {
 
   // Sane defaults.
   mission->title    = NULL;
-  mission->desc     = NULL;
+  //mission->desc     = NULL;
   mission->reward   = NULL;
 
   // Init lua.

src/toolkit.c

@@ -39,6 +39,7 @@ typedef struct Widget_ {
     struct {
       void(*fptr) (char*); // Active callback.
       char* display; // Stored text.
+      int   disabled;
     } btn;
     // Widget text.
     struct {
@@ -162,9 +163,11 @@ void window_addButton(const unsigned int wid, const int x, const int y,
   Window* wdw = window_wget(wid);
   Widget* wgt = window_newWidget(wdw);
 
+  // Specific.
   wgt->type = WIDGET_BUTTON;
   wgt->name = strdup(name);
   wgt->dat.btn.display = strdup(display);
+  wgt->dat.btn.disabled = 0;  // Initially enabled.
 
   // Set the properties.
   wgt->w = (double) w;
@@ -370,7 +373,29 @@ void window_modifyText(const unsigned int wid, char* name, char* newstring) {
   Widget* wgt = window_getwgt(wid, name);
 
   if(wgt->dat.txt.text) free(wgt->dat.txt.text);
-  //wgt->dat.txt.text = strdup(newstring);
+  wgt->dat.txt.text = strdup(newstring);
+}
+
+// Disable a button.
+void window_disableButton(const unsigned int wid, char* name) {
+  Widget* wgt = window_getwgt(wid, name);
+
+  if(wgt->type != WIDGET_BUTTON) {
+    DEBUG("Trying to disable a non-button widget '%s'", name);
+    return;
+  }
+  wgt->dat.btn.disabled = 1;
+}
+
+// Enable a button.
+void window_enableButton(const unsigned int wid, char* name) {
+  Widget* wgt = window_getwgt(wid, name);
+
+  if(wgt->type != WIDGET_BUTTON) {
+    DEBUG("Trying to enable a non-button widget '%s'", name);
+    return;
+  }
+  wgt->dat.btn.disabled = 0;
 }
 
 void window_modifyImage(const unsigned int wid, char* name, glTexture* image) {
@@ -794,6 +819,12 @@ static void toolkit_renderButton(Widget* btn, double bx, double by) {
   x = bx + btn->x;
   y = by + btn->y;
   
+  if(btn->dat.btn.disabled == 1) {
+    lc  = &cGrey50;
+    c   = &cGrey30;
+    dc  = &cGrey30;
+    oc  = &cGrey10;
+  } else {
     switch(btn->status) {
     // Set the color.
     case WIDGET_STATUS_NORMAL:
@@ -817,6 +848,7 @@ static void toolkit_renderButton(Widget* btn, double bx, double by) {
     default:
       break;
     }
+  }
 
   // Shaded base.
   toolkit_drawRect(x, y,      btn->w, 0.6*btn->h, dc, c);
@@ -1105,7 +1137,8 @@ static void toolkit_mouseEvent(SDL_Event* event) {
           break;
         case SDL_MOUSEBUTTONUP:
           if(wgt->status == WIDGET_STATUS_MOUSEDOWN) {
-            if(wgt->type == WIDGET_BUTTON) {
+            if((wgt->type == WIDGET_BUTTON) &&
+                  (wgt->dat.btn.disabled==0)) {
               if(wgt->dat.btn.fptr == NULL)
                 DEBUG("Toolkit: Button '%s' of Window '%s'"
                       "Does not have a function trigger",
@@ -1254,6 +1287,7 @@ static int toolkit_isFocusable(Widget* wgt) {
 
   switch(wgt->type) {
   case WIDGET_BUTTON:
+    if(wgt->dat.btn.disabled == 1) return 0;
   case WIDGET_LIST:
   case WIDGET_INPUT:
     return 1;

src/toolkit.h

@@ -50,7 +50,11 @@ char* dialogue_input(char* title, int min, int max, const char* fmt, ...);
 
 // Modification.
 void window_setFptr(const unsigned int wid, void(*fptr)(char*));
+// Text.
 void window_modifyText(const unsigned int wid, char* name, char* newstring);
+// Button.
+void window_disableButton(const unsigned int wid, char* name);
+void window_enableButton(const unsigned int wid, char* name);
 // Image.
 void window_modifyImage(const unsigned int wid, char* name, glTexture* image);
 void window_imgColour(const unsigned int wid, char* name, glColour* colour);