File glfw-add-drag-window.patch of Package glfw

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File glfw-add-drag-window.patch of Package glfw

From a4c76fbeed6c1a735b883c86c256e07d4958193b Mon Sep 17 00:00:00 2001
From: Felipe Ferreira da Silva <felipefsdev@gmail.com>
Date: Wed, 5 Apr 2017 22:14:09 -0300
Subject: [PATCH 1/4] Add glfwDragWindow

This is the initial implementation of glfwDragWindow, with support for
X11. The function glfwDragWindow requires only the target window to be
dragged. To make the function easier and more portable, the position of
the window and of the cursor are grabbed internally, so the end-user do
not need to pass them manually.

The example 'simple.c' was updated to include this functionality when
clicking on the client area of the window.
---
 examples/simple.c    |  7 +++++++
 include/GLFW/glfw3.h | 15 +++++++++++++++
 src/internal.h       |  1 +
 src/null_window.c    |  4 ++++
 src/window.c         | 10 ++++++++++
 src/wl_window.c      |  5 +++++
 src/x11_window.c     | 23 +++++++++++++++++++++++
 7 files changed, 65 insertions(+)

Index: glfw-3.3.8/include/GLFW/glfw3.h
===================================================================
--- glfw-3.3.8.orig/include/GLFW/glfw3.h
+++ glfw-3.3.8/include/GLFW/glfw3.h
@@ -3385,6 +3385,21 @@ GLFWAPI void glfwHideWindow(GLFWwindow*
  */
 GLFWAPI void glfwFocusWindow(GLFWwindow* window);
 
+/*! @brief Starts drag operation to the specified window.
+ *
+ *  This function starts the drag operation of the specified window.
+ *
+ *  @param[in] window The window to start the dragging operation.
+ *  @thread_safety This function must only be called from the main thread.
+ *
+ *  @sa @ref window_drag
+ *
+ *  @since Added in version 3.3.
+ *
+ *  @ingroup window
+ */
+GLFWAPI void glfwDragWindow(GLFWwindow* handle);
+
 /*! @brief Requests user attention to the specified window.
  *
  *  This function requests user attention to the specified window.  On
Index: glfw-3.3.8/src/null_window.c
===================================================================
--- glfw-3.3.8.orig/src/null_window.c
+++ glfw-3.3.8/src/null_window.c
@@ -231,6 +231,10 @@ void _glfwPlatformFocusWindow(_GLFWwindo
 {
 }
 
+void _glfwPlatformDragWindow(_GLFWwindow* window)
+{
+}
+
 int _glfwPlatformWindowFocused(_GLFWwindow* window)
 {
     return GLFW_FALSE;
Index: glfw-3.3.8/src/window.c
===================================================================
--- glfw-3.3.8.orig/src/window.c
+++ glfw-3.3.8/src/window.c
@@ -797,6 +797,16 @@ GLFWAPI void glfwFocusWindow(GLFWwindow*
     _glfwPlatformFocusWindow(window);
 }
 
+GLFWAPI void glfwDragWindow(GLFWwindow* handle)
+{
+    _GLFWwindow* window = (_GLFWwindow*) handle;
+    assert(window != NULL);
+
+    _GLFW_REQUIRE_INIT();
+
+    _glfwPlatformDragWindow(window);
+}
+
 GLFWAPI int glfwGetWindowAttrib(GLFWwindow* handle, int attrib)
 {
     _GLFWwindow* window = (_GLFWwindow*) handle;
Index: glfw-3.3.8/src/wl_window.c
===================================================================
--- glfw-3.3.8.orig/src/wl_window.c
+++ glfw-3.3.8/src/wl_window.c
@@ -2152,6 +2152,11 @@ void _glfwPlatformFocusWindow(_GLFWwindo
                     "Wayland: Focusing a window requires user interaction");
 }
 
+void _glfwPlatformDragWindow(_GLFWwindow* window)
+{
+    wl_shell_surface_move(window->wl.shellSurface, _glfw.wl.seat, _glfw.wl.pointerSerial);
+}
+
 void _glfwPlatformSetWindowMonitor(_GLFWwindow* window,
                                    _GLFWmonitor* monitor,
                                    int xpos, int ypos,
Index: glfw-3.3.8/src/x11_window.c
===================================================================
--- glfw-3.3.8.orig/src/x11_window.c
+++ glfw-3.3.8/src/x11_window.c
@@ -49,6 +49,7 @@
 #define _NET_WM_STATE_REMOVE        0
 #define _NET_WM_STATE_ADD           1
 #define _NET_WM_STATE_TOGGLE        2
+#define _NET_WM_MOVERESIZE_MOVE     8
 
 // Additional mouse button names for XButtonEvent
 #define Button6            6
@@ -2472,6 +2473,28 @@ void _glfwPlatformFocusWindow(_GLFWwindo
     XFlush(_glfw.x11.display);
 }
 
+void _glfwPlatformDragWindow(_GLFWwindow* window)
+{
+    int winXpos, winYpos;
+    double curXpos, curYpos;
+    XClientMessageEvent xclient;
+    memset(&xclient, 0, sizeof(XClientMessageEvent));
+    XUngrabPointer(_glfw.x11.display, 0);
+    XFlush(_glfw.x11.display);
+    _glfwPlatformGetCursorPos(window, &curXpos, &curYpos);
+    _glfwPlatformGetWindowPos(window, &winXpos, &winYpos);
+    xclient.type = ClientMessage;
+    xclient.window = window->x11.handle;
+    xclient.message_type = XInternAtom(_glfw.x11.display, "_NET_WM_MOVERESIZE", False);
+    xclient.format = 32;
+    xclient.data.l[0] = winXpos + curXpos;
+    xclient.data.l[1] = winYpos + curYpos;
+    xclient.data.l[2] = _NET_WM_MOVERESIZE_MOVE;
+    xclient.data.l[3] = 0;
+    xclient.data.l[4] = 0;
+    XSendEvent(_glfw.x11.display, _glfw.x11.root, False, SubstructureRedirectMask | SubstructureNotifyMask, (XEvent *)&xclient);
+}
+
 void _glfwPlatformSetWindowMonitor(_GLFWwindow* window,
                                    _GLFWmonitor* monitor,
                                    int xpos, int ypos,
Index: glfw-3.3.8/tests/windows.c
===================================================================
--- glfw-3.3.8.orig/tests/windows.c
+++ glfw-3.3.8/tests/windows.c
@@ -90,6 +90,12 @@ static void key_callback(GLFWwindow* win
     }
 }
 
+void mouse_button_callback(GLFWwindow* window, int button, int action, int mods)
+{
+    if (button == GLFW_MOUSE_BUTTON_LEFT && action == GLFW_PRESS)
+        glfwDragWindow(window);
+}
+
 int main(int argc, char** argv)
 {
     int i, ch;
@@ -139,6 +145,7 @@ int main(int argc, char** argv)
         }
 
         glfwSetKeyCallback(windows[i], key_callback);
+        glfwSetMouseButtonCallback(windows[i], mouse_button_callback);
 
         glfwMakeContextCurrent(windows[i]);
         gladLoadGL(glfwGetProcAddress);

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File glfw-add-drag-window.patch of Package glfw

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