directfb + gtk的鼠标隐藏问题

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我是靠谱客的博主稳重乌龟，这篇文章主要介绍directfb + gtk的鼠标隐藏问题，现在分享给大家，希望可以做个参考。

这段时间实现基于directfb的GTK项目，遇到一些问题，其中一个问题是由于基于directfb的gtk没有实现相应的接口造成。本来想通过移动鼠标或禁止鼠标的方式来实现鼠标的隐藏，但是因为gdk_display_warp_pointer()和gdk_display_freeze_pointer()接口没有实现无法实现鼠标的隐藏。

为了能够隐藏鼠标我找了gdk_display_warp_pointer()和gdk_display_freeze_pointer()的实现。为了以后回来温习，同时让其他人不为此烦恼，我将实现贴出。

/* 移动鼠标 */

void gdk_display_warp_pointer (GdkDisplay *display,

GdkScreen *screen,

gint x,

gint y)

{

GdkDisplayDFB * gdkdisplay = _gdk_display;

gdkdisplay->layer->SetCooperativeLevel(gdkdisplay->layer, DLSCL_ADMINISTRATIVE);

DFBResult returnvalue = gdkdisplay->layer->WarpCursor(gdkdisplay->layer, x, y);

gdkdisplay->layer->SetCooperativeLevel(gdkdisplay->layer, DLSCL_SHARED);

}

/* 使能或不使能鼠标 */

void gdk_display_freeze_pointer (const gboolean flag)

{

GdkDisplayDFB * gdkdisplay = _gdk_display;

gdkdisplay->layer->SetCooperativeLevel(gdkdisplay->layer, DLSCL_ADMINISTRATIVE);

DFBResult returnvalue = gdkdisplay->layer->EnableCursor(gdkdisplay->layer, flag);

gdkdisplay->layer->SetCooperativeLevel(gdkdisplay->layer, DLSCL_SHARED);

}

/* 用一个透明图片覆盖鼠标 */

void gdk_window_set_invisible_cursor (GdkWindow *window)
{
GdkBitmap *empty_bitmap;
GdkCursor *cursor;
GdkColor useless;
char invisible_cursor_bits[] = { 0x0 };
useless.red = useless.green = useless.blue = 0;
useless.pixel = 0;
empty_bitmap = gdk_bitmap_create_from_data (window,
          invisible_cursor_bits,
          1, 1);
  cursor = gdk_cursor_new_from_pixmap (empty_bitmap,
          empty_bitmap,
          &useless,
          &useless, 0, 0);
gdk_window_set_cursor (window, cursor);
gdk_cursor_unref (cursor);
g_object_unref (G_OBJECT (empty_bitmap));
}