Adding QWidget touch driver

docs/releases.txt

@@ -11,6 +11,7 @@ FEATURE:	Added gwinPrintg()
 FIX:		Fix sprintg and related functions handling of NULL pointers.
 FIX:		Fixing width calculation of gdispGDrawString() and gdispGFillString().
 FEATURE:	Added QImage display driver.
+FEATURE:	Added QWidget touch driver
 FEATURE:	Added support for Qt as a GOS platform
 FEATURE:	Add ability to set a parent for a win32 ugfx emulator window
 FEATURE:	Add ability to inject mouse events for a Win32 ugfx emulator window

drivers/ginput/touch/QWidget/example/mywidget.cpp

@@ -0,0 +1,54 @@
+#include "mywidget.h"
+#include "ugfx/src/ginput/ginput_driver_mouse.h"
+
+extern GMouse* qwidgetMouse;
+extern coord_t qwidgetMouseX;
+extern coord_t qwidgetMouseY;
+extern coord_t qwidgetMouseZ;
+extern uint16_t qwidgetMouseButtons;
+
+MyWidget::MyWidget(QWidget* parent) : QWidget(parent)
+{
+    // GMouse
+    if (!qwidgetMouse) {
+        qFatal("MyWidget::MyWidget(): Invalid GMouse (nullptr).");
+    }
+    qwidgetMouse->display = nullptr;	// Set your display here!
+}
+
+void MyWidget::mousePressEvent(QMouseEvent* event)
+{
+    event->accept();
+
+    qwidgetMouseX = event->x();
+    qwidgetMouseY = event->y();
+    qwidgetMouseZ = 1;
+
+    if (event->buttons() & Qt::LeftButton) {
+        qwidgetMouseButtons = GINPUT_MOUSE_BTN_LEFT;
+    } else if (event->buttons() & Qt::RightButton) {
+        qwidgetMouseButtons = GINPUT_MOUSE_BTN_RIGHT;
+    }
+
+    _gmouseWakeup(qwidgetMouse);
+}
+
+void MyWidget::mouseReleaseEvent(QMouseEvent* event)
+{
+    event->accept();
+
+    qwidgetMouseZ = 0;
+    qwidgetMouseButtons = 0;
+
+    _gmouseWakeup(qwidgetMouse);
+}
+
+void MyWidget::mouseMoveEvent(QMouseEvent* event)
+{
+    event->accept();
+
+    qwidgetMouseX = event->x();
+    qwidgetMouseY = event->y();
+
+    _gmouseWakeup(qwidgetMouse);
+}

drivers/ginput/touch/QWidget/example/mywidget.h

@@ -0,0 +1,18 @@
+#pragma once
+
+class MyWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    MyWidget(QWidget* parent = nullptr);
+    virtual ~MyWidget() = default;
+
+protected:
+    virtual void mousePressEvent(QMouseEvent* event) override;
+    virtual void mouseReleaseEvent(QMouseEvent* event) override;
+    virtual void mouseMoveEvent(QMouseEvent* event) override;
+
+private:
+    Q_DISABLE_COPY(MyWidget)
+};

drivers/ginput/touch/QWidget/example/readme.txt

@@ -0,0 +1,3 @@
+This example shows how a QWidget can be used as touch input.
+
+Important note: The GDisplay pointer must be set to a valid display in mywidget.cpp:16 for this to work.

drivers/ginput/touch/QWidget/gmouse_lld_QWidget.c

@@ -0,0 +1,74 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+#include "ugfx/gfx.h"
+
+
+#if GFX_USE_GINPUT && GINPUT_NEED_MOUSE
+
+#define GMOUSE_DRIVER_VMT		GMOUSEVMT_QWidget
+#include "../../../../src/ginput/ginput_driver_mouse.h"
+
+GMouse* qwidgetMouse;
+coord_t qwidgetMouseX;
+coord_t qwidgetMouseY;
+coord_t qwidgetMouseZ;
+uint16_t qwidgetMouseButtons;
+
+static bool_t _init(GMouse* m, unsigned driverinstance)
+{
+    (void)driverinstance;
+
+    qwidgetMouse = m;
+
+	return TRUE;
+}
+
+static bool_t _read(GMouse* m, GMouseReading* pdr)
+{
+    (void)m;
+
+    pdr->x = qwidgetMouseX;
+    pdr->y = qwidgetMouseY;
+    pdr->z = qwidgetMouseZ;
+    pdr->buttons = qwidgetMouseButtons;
+
+	return TRUE;
+}
+
+const GMouseVMT GMOUSE_DRIVER_VMT[1] = {{
+	{
+        GDRIVER_TYPE_MOUSE,
+        0,
+        sizeof(GMouse),
+		_gmouseInitDriver,
+		_gmousePostInitDriver,
+		_gmouseDeInitDriver
+	},
+    1,				// z_max
+    0,  			// z_min
+    1,              // z_touchon
+    0,              // z_touchoff
+	{				// pen_jitter
+        1,          // calibrate
+        1,			// click
+        1           // move
+	},
+	{				// finger_jitter
+        1,          // calibrate
+        1,			// click
+        1			// move
+	},
+    _init,          // init
+	0,				// deinit
+    _read,          // get
+	0,				// calsave
+	0				// calload
+}};
+
+#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
+

drivers/ginput/touch/QWidget/readme.txt

@@ -0,0 +1,5 @@
+Limitation: As this driver only exports one set of variables, this driver can only be used
+            on systems with one single touch input device of this type. To overcome this
+            limitation, the global variables have to be converted into arrays. The driverinstance
+            variable passed to the _read() function is then used to distinguish between the
+            different instances.