Cleanup of touch screen code.

Initialize in constructor and clean up in destructor instead of having separate init() and deinit() methods.
Don't close file descriptor if open failed (ts_fd == -1).
Renamed initialized() to available(), since it tests whether the touch screen was found, not whether an initialization was attempted.
Improved code layout and minor other cleanups.

src/browsedialog.cpp

@@ -64,7 +64,7 @@ bool BrowseDialog::exec()
 	selected = 0;
 	close = false;
 	while (!close) {
-		if (gmenu2x->ts.initialized()) gmenu2x->ts.poll();
+		if (gmenu2x->ts.available()) gmenu2x->ts.poll();
 
 		paint();
 
@@ -111,7 +111,7 @@ void BrowseDialog::handleInput()
 		action = getAction(button);
 	}
 
-	if (gmenu2x->ts.initialized() && gmenu2x->ts.pressed() && !gmenu2x->ts.inRect(touchRect)) ts_pressed = false;
+	if (gmenu2x->ts.available() && gmenu2x->ts.pressed() && !gmenu2x->ts.inRect(touchRect)) ts_pressed = false;
 
 	if (action == BrowseDialog::ACT_SELECT && (*fl)[selected] == "..")
 		action = BrowseDialog::ACT_GOUP;
@@ -250,7 +250,7 @@ void BrowseDialog::paint()
 		icon->blit(gmenu2x->s, 5, offsetY);
 		gmenu2x->s->write(gmenu2x->font, (*fl)[i], 24, offsetY + 8, ASFont::HAlignLeft, ASFont::VAlignMiddle);
 
-		if (gmenu2x->ts.initialized() && gmenu2x->ts.pressed() && gmenu2x->ts.inRect(touchRect.x, offsetY + 3, touchRect.w, rowHeight)) {
+		if (gmenu2x->ts.available() && gmenu2x->ts.pressed() && gmenu2x->ts.inRect(touchRect.x, offsetY + 3, touchRect.w, rowHeight)) {
 			ts_pressed = true;
 			selected = i;
 		}

src/gmenu2x.cpp

@@ -262,10 +262,7 @@ void GMenu2X::init() {
 /*	gp2x_mem = open("/dev/mem", O_RDWR);
 	gp2x_memregs=(unsigned short *)mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, gp2x_mem, 0xc0000000);
 	MEM_REG=&gp2x_memregs[0];
-	if (f200) {
-		//if wm97xx fails to open, set f200 to false to prevent any further access to the touchscreen
-		f200 = ts.init();
-	}*/
+	*/
 #else
 	batteryHandle = fopen("/sys/class/power_supply/battery/capacity", "r");
 	usbHandle = fopen("/sys/class/power_supply/usb/online", "r");
@@ -287,8 +284,7 @@ void GMenu2X::deinit() {
 		gp2x_memregs[0x290C>>1]=640;
 		close(gp2x_mem);
 	}
-
-	if (f200) ts.deinit();*/
+*/
 #else
 	if (batteryHandle) fclose(batteryHandle);
 	if (backlightHandle) fclose(backlightHandle);
@@ -1059,7 +1055,7 @@ void GMenu2X::main() {
 			}
 		}
 
-		if (ts.initialized()) {
+		if (ts.available()) {
 			btnContextMenu.paint();
 		}
 		//check battery status every 60 seconds
@@ -1123,7 +1119,7 @@ void GMenu2X::main() {
 		s->flip();
 
 		//touchscreen
-		if (ts.initialized()) {
+		if (ts.available()) {
 			ts.poll();
 			btnContextMenu.handleTS();
 			re.x = 0; re.y = 0; re.h = skinConfInt["topBarHeight"]; re.w = resX;
@@ -1593,7 +1589,7 @@ void GMenu2X::contextMenu() {
 		s->flip();
 
 		//touchscreen
-		if (ts.initialized()) {
+		if (ts.available()) {
 			ts.poll();
 			if (ts.released()) {
 				if (!ts.inRect(box))

src/gmenu2x.h

@@ -174,7 +174,7 @@ public:
 	//firmware type and version
 	std::string fwType, fwVersion;
 
-	bool isF200() { return ts.initialized(); }
+	bool isF200() { return ts.available(); }
 
 	// Open2x settings ---------------------------------------------------------
 	bool o2x_usb_net_on_boot, o2x_ftp_on_boot, o2x_telnet_on_boot, o2x_gp2xjoy_on_boot, o2x_usb_host_on_boot, o2x_usb_hid_on_boot, o2x_usb_storage_on_boot;

src/inputdialog.cpp

@@ -174,7 +174,7 @@ bool InputDialog::exec() {
 					gmenu2x->skinConfColors[COLOR_SELECTION_BG]);
 		}
 
-		if (ts.initialized()) ts.poll();
+		if (ts.available()) ts.poll();
 		drawVirtualKeyboard();
 		gmenu2x->s->flip();
 
@@ -291,7 +291,7 @@ void InputDialog::drawVirtualKeyboard() {
 			};
 
 			//if ts on rect, change selection
-			if (ts.initialized() && ts.pressed() && ts.inRect(re)) {
+			if (ts.available() && ts.pressed() && ts.inRect(re)) {
 				selCol = xc;
 				selRow = l;
 			}
@@ -309,7 +309,7 @@ void InputDialog::drawVirtualKeyboard() {
 	//Ok/Cancel
 	SDL_Rect re = {kbLeft-1, KB_TOP+kb->size()*KEY_HEIGHT, kbLength*KEY_WIDTH/2-1, KEY_HEIGHT-1};
 	gmenu2x->s->rectangle(re, gmenu2x->skinConfColors[COLOR_SELECTION_BG]);
-	if (ts.initialized() && ts.pressed() && ts.inRect(re)) {
+	if (ts.available() && ts.pressed() && ts.inRect(re)) {
 		selCol = 0;
 		selRow = kb->size();
 	}
@@ -320,7 +320,7 @@ void InputDialog::drawVirtualKeyboard() {
 
 	re.x = kbLeft + kbLength * KEY_WIDTH / 2 - 1;
 	gmenu2x->s->rectangle(re, gmenu2x->skinConfColors[COLOR_SELECTION_BG]);
-	if (ts.initialized() && ts.pressed() && ts.inRect(re)) {
+	if (ts.available() && ts.pressed() && ts.inRect(re)) {
 		selCol = 1;
 		selRow = kb->size();
 	}

src/settingsdialog.cpp

@@ -61,7 +61,7 @@ bool SettingsDialog::exec() {
 	uint numRows = (gmenu2x->resY-gmenu2x->skinConfInt["topBarHeight"]-20)/rowHeight;
 
 	while (!close) {
-		if (ts.initialized()) ts.poll();
+		if (ts.available()) ts.poll();
 
 		bg.blit(gmenu2x->s,0,0);
 
@@ -88,11 +88,11 @@ bool SettingsDialog::exec() {
 
 		gmenu2x->s->setClipRect(clipRect);
 		if (ts_pressed && !ts.pressed()) ts_pressed = false;
-		if (ts.initialized() && ts.pressed() && !ts.inRect(touchRect)) ts_pressed = false;
+		if (ts.available() && ts.pressed() && !ts.inRect(touchRect)) ts_pressed = false;
 		for (i=firstElement; i<voices.size() && i<firstElement+numRows; i++) {
 			iY = i-firstElement;
 			voices[i]->draw(iY*rowHeight+gmenu2x->skinConfInt["topBarHeight"]+2);
-			if (ts.initialized() && ts.pressed() && ts.inRect(touchRect.x, touchRect.y+(iY*rowHeight), touchRect.w, rowHeight)) {
+			if (ts.available() && ts.pressed() && ts.inRect(touchRect.x, touchRect.y+(iY*rowHeight), touchRect.w, rowHeight)) {
 				ts_pressed = true;
 				sel = i;
 			}

src/touchscreen.cpp

@@ -18,15 +18,13 @@
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  ***************************************************************************/
 
-#include <unistd.h>
-#include <iostream>
-
 #include "touchscreen.h"
 
-using namespace std;
+#include <fcntl.h>
+#include <unistd.h>
+
 
 Touchscreen::Touchscreen() {
-	ts_fd = 0;
 	calibrated = false;
 	wasPressed = false;
 	_handled = false;
@@ -37,29 +35,23 @@ Touchscreen::Touchscreen() {
 	event.x = 0;
 	event.y = 0;
 	event.pressure = 0;
+#ifdef PLATFORM_GP2X
+	ts_fd = open("/dev/touchscreen/wm97xx", O_RDONLY|O_NOCTTY);
+#else
+	ts_fd = 0;
+#endif
 }
 
 Touchscreen::~Touchscreen() {
-	deinit();
-}
-
-bool Touchscreen::init() {
-#ifdef PLATFORM_GP2X
-	ts_fd = open("/dev/touchscreen/wm97xx", O_RDONLY|O_NOCTTY);
-#endif
-	return initialized();
-}
-
-void Touchscreen::deinit()
-{
-	if (ts_fd) close(ts_fd);
-	ts_fd = 0;
+	if (ts_fd > 0) {
+		close(ts_fd);
+	}
 }
 
 void Touchscreen::calibrate() {
-	if (event.pressure==0) {
-		calibX = ((event.x-200)*320/3750)/4;
-		calibY = (((event.y-200)*240/3750))/4;
+	if (event.pressure == 0) {
+		calibX = ((event.x - 200) * 320 / 3750) / 4;
+		calibY = (((event.y - 200) * 240 / 3750)) / 4;
 		calibrated = true;
 	}
 }
@@ -70,9 +62,9 @@ bool Touchscreen::poll() {
 	read(ts_fd, &event, sizeof(TS_EVENT));
 	if (!calibrated) calibrate();
 
-	if (event.pressure>0) {
-		x = ((event.x-200)*320/3750)-calibX;
-		y = (240 - ((event.y-200)*240/3750))-calibY;
+	if (event.pressure > 0) {
+		x = ((event.x - 200) * 320 / 3750) - calibX;
+		y = (240 - ((event.y - 200) * 240 / 3750)) - calibY;
 	}
 #else
 	SDL_PumpEvents();
@@ -105,7 +97,7 @@ void Touchscreen::setHandled() {
 }
 
 bool Touchscreen::pressed() {
-	return !_handled && event.pressure>0;
+	return !_handled && event.pressure > 0;
 }
 
 bool Touchscreen::released() {
@@ -113,19 +105,22 @@ bool Touchscreen::released() {
 }
 
 bool Touchscreen::inRect(SDL_Rect r) {
-	return !_handled && (y>=r.y) && (y<=r.y+r.h) && (x>=r.x) && (x<=r.x+r.w);
+	return !_handled &&
+		(y >= r.y) && (y <= r.y + r.h) && (x >= r.x) && (x <= r.x + r.w);
 }
 
 bool Touchscreen::inRect(int x, int y, int w, int h) {
-	SDL_Rect rect = {x,y,w,h};
+	SDL_Rect rect = { x, y, w, h };
 	return inRect(rect);
 }
 
 bool Touchscreen::startedInRect(SDL_Rect r) {
-	return !_handled && (startY>=r.y) && (startY<=r.y+r.h) && (startX>=r.x) && (startX<=r.x+r.w);
+	return !_handled &&
+		(startY >= r.y) && (startY <= r.y + r.h) &&
+		(startX >= r.x) && (startX <= r.x + r.w);
 }
 
 bool Touchscreen::startedInRect(int x, int y, int w, int h) {
-	SDL_Rect rect = {x,y,w,h};
+	SDL_Rect rect = { x, y, w, h };
 	return startedInRect(rect);
 }

src/touchscreen.h

@@ -23,7 +23,6 @@
 
 #include <SDL.h>
 
-#include <fcntl.h>
 #include <stdint.h>
 
 typedef struct {
@@ -35,26 +34,13 @@ typedef struct {
 } TS_EVENT;
 
 class Touchscreen {
-private:
-	int ts_fd;
-	bool calibrated, _handled;
-	TS_EVENT event;
-	int calibX, calibY;
-	int x, y, startX, startY;
-	bool wasPressed;
-
-	void calibrate(/*TS_EVENT event*/);
-
 public:
 	Touchscreen();
 	~Touchscreen();
 
-	bool init();
-	void deinit();
-
-	bool initialized() {
+	bool available() {
 #ifdef PLATFORM_GP2X
-		return ts_fd>0;
+		return ts_fd > 0;
 #endif
 		return false;
 	}
@@ -73,6 +59,16 @@ public:
 
 	int getX() { return x; }
 	int getY() { return y; }
+
+private:
+	int ts_fd;
+	bool calibrated, _handled;
+	TS_EVENT event;
+	int calibX, calibY;
+	int x, y, startX, startY;
+	bool wasPressed;
+
+	void calibrate(/*TS_EVENT event*/);
 };
 
 #endif