WPrefs: Add ability to set integer values in Expert panel

Previously, only boolean values could be changed using the Expert panel.
This patch adds the ability to change integer values.  A new class,
OPTION_WMAKER_INT, is added.  When this class is used, a textfield and two
buttons (up and down) appear instead of a checkbox.  Users can either type
the integer value or increment/decrement it using the arrows.

WPrefs.app/Expert.c

@@ -33,7 +33,8 @@ static const struct {
 	enum {
 		OPTION_WMAKER,
 		OPTION_WMAKER_ARRAY,
-		OPTION_USERDEF
+		OPTION_USERDEF,
+		OPTION_WMAKER_INT
 	} class;
 
 	const char *op_name;  /* The identifier for the option in the config file */
@@ -96,6 +97,7 @@ static const struct {
 };
 
 
+
 typedef struct _Panel {
 	WMBox *box;
 	char *sectionName;
@@ -108,10 +110,37 @@ typedef struct _Panel {
 
 	WMButton *swi[wlengthof_nocheck(expert_options)];
 
+	WMTextField *textfield[wlengthof_nocheck(expert_options)];
+
 } _Panel;
 
 #define ICON_FILE	"expert"
 
+static void changeIntTextfield(void *data, int delta)
+{
+	WMTextField *textfield;
+	char *text;
+	int value;
+
+	textfield = (WMTextField *)data;
+	text = WMGetTextFieldText(textfield);
+	value = atoi(text);
+	value += delta;
+	sprintf(text, "%d", value);
+	WMSetTextFieldText(textfield, text);
+}
+
+static void downButtonCallback(WMWidget *self, void *data)
+{
+	(void) self;
+	changeIntTextfield(data, -1);
+}
+
+static void upButtonCallback(WMWidget *self, void *data)
+{
+	(void) self;
+	changeIntTextfield(data, 1);
+}
 
 static void createPanel(Panel *p)
 {
@@ -137,11 +166,13 @@ static void createPanel(Panel *p)
 
 	udb = WMGetStandardUserDefaults();
 	for (i = 0; i < wlengthof(expert_options); i++) {
+		if (expert_options[i].class != OPTION_WMAKER_INT) {
 			panel->swi[i] = WMCreateSwitchButton(f);
 			WMResizeWidget(panel->swi[i], FRAME_WIDTH - 40, 25);
 			WMMoveWidget(panel->swi[i], 5, 5 + i * 25);
 
 			WMSetButtonText(panel->swi[i], _(expert_options[i].label));
+		}
 
 		switch (expert_options[i].class) {
 		case OPTION_WMAKER:
@@ -163,6 +194,49 @@ static void createPanel(Panel *p)
 			state = WMGetUDBoolForKey(udb, expert_options[i].op_name);
 			break;
 
+		case OPTION_WMAKER_INT:
+		{
+			char tmp[10];
+			WMButton *up, *down;
+			WMLabel *label;
+
+			panel->textfield[i] = WMCreateTextField(f);
+			WMResizeWidget(panel->textfield[i], 41, 20);
+			WMMoveWidget(panel->textfield[i], 22, 7 + i * 25);
+
+			down = WMCreateCommandButton(f);
+			WMSetButtonImage(down, WMGetSystemPixmap(WMWidgetScreen(down), WSIArrowDown));
+			WMSetButtonAltImage(down,
+					    WMGetSystemPixmap(WMWidgetScreen(down), WSIHighlightedArrowDown));
+			WMSetButtonImagePosition(down, WIPImageOnly);
+			WMSetButtonAction(down, downButtonCallback, panel->textfield[i]);
+			WMResizeWidget(down, 16, 16);
+			WMMoveWidget(down, 5, 9 + i * 25);
+
+			up = WMCreateCommandButton(f);
+			WMSetButtonImage(up, WMGetSystemPixmap(WMWidgetScreen(up), WSIArrowUp));
+			WMSetButtonAltImage(up, WMGetSystemPixmap(WMWidgetScreen(up), WSIHighlightedArrowUp));
+			WMSetButtonImagePosition(up, WIPImageOnly);
+			WMSetButtonAction(up, upButtonCallback, panel->textfield[i]);
+			WMResizeWidget(up, 16, 16);
+			WMMoveWidget(up, 64, 9 + i * 25);
+
+			label = WMCreateLabel(f);
+			WMSetLabelText(label, _(expert_options[i].label));
+			WMResizeWidget(label, FRAME_WIDTH - 99, 25);
+			WMMoveWidget(label, 85, 5 + i * 25);
+
+			if (GetStringForKey(expert_options[i].op_name))
+				state = GetIntegerForKey(expert_options[i].op_name);
+			else
+				state = expert_options[i].def_state;
+
+			sprintf(tmp, "%d", state);
+			WMSetTextFieldText(panel->textfield[i], tmp);
+
+			break;
+		}
+
 		default:
 #ifdef DEBUG
 			wwarning("export_options[%d].class = %d, this should not happen\n",
@@ -171,6 +245,7 @@ static void createPanel(Panel *p)
 			state = expert_options[i].def_state;
 			break;
 		}
+		if (expert_options[i].class != OPTION_WMAKER_INT)
 			WMSetButtonSelected(panel->swi[i], state);
 	}
 
@@ -204,6 +279,18 @@ static void storeDefaults(_Panel *panel)
 		case OPTION_USERDEF:
 			WMSetUDBoolForKey(udb, WMGetButtonSelected(panel->swi[i]), expert_options[i].op_name);
 			break;
+
+		case OPTION_WMAKER_INT:
+		{
+			char *text;
+			int value;
+
+			text = WMGetTextFieldText(panel->textfield[i]);
+			value = atoi(text);
+
+			SetIntegerForKey(value, expert_options[i].op_name);
+			break;
+		}
 		}
 	}
 }