Support 16+4 mouse buttons within the generic/evdevmouse plugin.

The Kernel's evdev module is capable of presenting up to 16 mouse
buttons, plus wheel events (UP, DOWN, LEFT, and RIGHT). This
patch updates our Plugin, so that it tranlates all of those button
numbers into corresponding MouseEvent Qt::MouseButton values.

Task-number: QTBUG-24590

Change-Id: Ib8cbb9500280c76f06a51ce95095e22ae84de1c6
Reviewed-by: Laszlo Agocs <laszlo.p.agocs@nokia.com>

diff --git a/src/plugins/generic/evdevmouse/qevdevmouse.cpp b/src/plugins/generic/evdevmouse/qevdevmouse.cpp
index 0b72123..be779c6 100644 (file)
--- a/src/plugins/generic/evdevmouse/qevdevmouse.cpp
+++ b/src/plugins/generic/evdevmouse/qevdevmouse.cpp
@@ -176,12 +176,27 @@ void QEvdevMouseHandler::readMouseData()
 
             sendMouseEvent();
             pendingMouseEvent = false;
-        } else if (data->type == EV_KEY && data->code >= BTN_LEFT && data->code <= BTN_MIDDLE) {
+        } else if (data->type == EV_KEY && data->code >= BTN_LEFT && data->code <= BTN_JOYSTICK) {
             Qt::MouseButton button = Qt::NoButton;
+            // BTN_LEFT == 0x110 in kernel's input.h
+            // The range of possible mouse buttons ends just before BTN_JOYSTICK, value 0x120.
             switch (data->code) {
-            case BTN_LEFT: button = Qt::LeftButton; break;
-            case BTN_MIDDLE: button = Qt::MidButton; break;
-            case BTN_RIGHT: button = Qt::RightButton; break;
+            case 0x110: button = Qt::LeftButton; break;    // BTN_LEFT
+            case 0x111: button = Qt::RightButton; break;
+            case 0x112: button = Qt::MiddleButton; break;
+            case 0x113: button = Qt::ExtraButton1; break;  // AKA Qt::BackButton
+            case 0x114: button = Qt::ExtraButton2; break;  // AKA Qt::ForwardButton
+            case 0x115: button = Qt::ExtraButton3; break;  // AKA Qt::TaskButton
+            case 0x116: button = Qt::ExtraButton4; break;
+            case 0x117: button = Qt::ExtraButton5; break;
+            case 0x118: button = Qt::ExtraButton6; break;
+            case 0x119: button = Qt::ExtraButton7; break;
+            case 0x11a: button = Qt::ExtraButton8; break;
+            case 0x11b: button = Qt::ExtraButton9; break;
+            case 0x11c: button = Qt::ExtraButton10; break;
+            case 0x11d: button = Qt::ExtraButton11; break;
+            case 0x11e: button = Qt::ExtraButton12; break;
+            case 0x11f: button = Qt::ExtraButton13; break;
             }
             if (data->value)
                 m_buttons |= button;