From 7ca4c7358d6bbbcbe1b5f535e39e73036edb6495 Mon Sep 17 00:00:00 2001
From: Karl Kurbjun <kkurbjun@gmail.com>
Date: Fri, 14 Aug 2009 23:08:50 +0000
Subject: Hopefully get all of the touchscreen drivers to act the same so
 release events get the appropriate data.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22314 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/tcc780x/cowond2/button-cowond2.c             | 9 +++++----
 firmware/target/arm/tms320dm320/mrobe-500/button-mr500.c         | 6 +++++-
 firmware/target/mips/ingenic_jz47xx/onda_vx747/sadc-onda_vx747.c | 5 +++++
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/firmware/target/arm/tcc780x/cowond2/button-cowond2.c b/firmware/target/arm/tcc780x/cowond2/button-cowond2.c
index 6ff87dd49c..a9b7265d4a 100644
--- a/firmware/target/arm/tcc780x/cowond2/button-cowond2.c
+++ b/firmware/target/arm/tcc780x/cowond2/button-cowond2.c
@@ -103,11 +103,12 @@ int button_read_device(int *data)
 {
     int btn = BUTTON_NONE;
     int adc;
+    static int old_data = 0;
 
     static bool hold_button = false;
     bool hold_button_old;
     
-    *data = 0;
+    *data = old_data;
 
     hold_button_old = hold_button;
     hold_button = button_hold();
@@ -188,7 +189,7 @@ int button_read_device(int *data)
         {
             last_x = x;
             last_y = y;
-            *data = touch_to_pixels(x, y);
+            old_data = *data = touch_to_pixels(x, y);
             btn |= touchscreen_to_pixels((*data&0xffff0000)>>16,
                                          (*data&0x0000ffff),
                                          data);
@@ -197,12 +198,12 @@ int button_read_device(int *data)
         last_touch = current_tick;
         touch_available = false;
     }
-
+    
     if (!(GPIOA & 0x4))
         btn |= BUTTON_POWER;
         
     if(btn & BUTTON_TOUCHSCREEN && !is_backlight_on(true))
-        *data = 0;
+        old_data = *data = 0;
     
     return btn;
 }
diff --git a/firmware/target/arm/tms320dm320/mrobe-500/button-mr500.c b/firmware/target/arm/tms320dm320/mrobe-500/button-mr500.c
index 04acb71e45..7d9a43f902 100644
--- a/firmware/target/arm/tms320dm320/mrobe-500/button-mr500.c
+++ b/firmware/target/arm/tms320dm320/mrobe-500/button-mr500.c
@@ -108,9 +108,13 @@ inline bool button_hold(void)
     return hold_button;
 }
 
+/* Since this is a touchscreen, the expectation in higher levels is that the
+ *  previous touch location is maintained when a release occurs.  This is
+ *  intended to mimic a mouse or other similar pointing device.
+ */
 int button_read_device(int *data)
 {
-    static int old_data;
+    static int old_data = 0;
     int button_read = BUTTON_NONE;
     short touch_x, touch_y, touch_z1, touch_z2;
     static bool hold_button_old = false;
diff --git a/firmware/target/mips/ingenic_jz47xx/onda_vx747/sadc-onda_vx747.c b/firmware/target/mips/ingenic_jz47xx/onda_vx747/sadc-onda_vx747.c
index 24caac0100..592d0805a3 100644
--- a/firmware/target/mips/ingenic_jz47xx/onda_vx747/sadc-onda_vx747.c
+++ b/firmware/target/mips/ingenic_jz47xx/onda_vx747/sadc-onda_vx747.c
@@ -158,6 +158,9 @@ bool button_hold(void)
 int button_read_device(int *data)
 {
     int ret = 0;
+    static int old_data = 0;
+    
+    data = old_data;
 
     /* Filter button events out if HOLD button is pressed at firmware/ level */
     if(button_hold())
@@ -181,6 +184,8 @@ int button_read_device(int *data)
         ret |= touchscreen_to_pixels(cur_touch >> 16, cur_touch & 0xFFFF, data);
         if( UNLIKELY(!is_backlight_on(true)) )
             *data = 0;
+            
+        old_data = data;
     }
 
     return ret;
-- 
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