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DesktopWindow.cxx
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DesktopWindow.cxx
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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright 2011 Pierre Ossman <[email protected]> for Cendio AB
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <algorithm>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <rfb/LogWriter.h>
#include <rfb/CMsgWriter.h>
#include <rfb/util.h>
#include "DesktopWindow.h"
#include "OptionsDialog.h"
#include "i18n.h"
#include "parameters.h"
#include "vncviewer.h"
#include "CConn.h"
#include "Surface.h"
#include "Viewport.h"
#include "touch.h"
#include <FL/Fl.H>
#include <FL/Fl_Image_Surface.H>
#include <FL/Fl_Scrollbar.H>
#include <FL/fl_draw.H>
#include <FL/x.H>
#ifdef WIN32
#include "win32.h"
#endif
#ifdef __APPLE__
#include "cocoa.h"
#include <Carbon/Carbon.h>
#endif
// width of each "edge" region where scrolling happens,
// as a ratio compared to the viewport size
// default: 1/16th of the viewport size
#define EDGE_SCROLL_SIZE 16
// edge width is calculated at runtime; these values are just examples
static int edge_scroll_size_x = 128;
static int edge_scroll_size_y = 96;
// maximum pixels to scroll per frame
#define EDGE_SCROLL_SPEED 16
// how long to wait between viewport scroll position changes
// default: roughly 60 fps for smooth motion
#define EDGE_SCROLL_SECONDS_PER_FRAME 0.016666
using namespace rfb;
static rfb::LogWriter vlog("DesktopWindow");
// Global due to http://www.fltk.org/str.php?L2177 and the similar
// issue for Fl::event_dispatch.
static std::set<DesktopWindow *> instances;
DesktopWindow::DesktopWindow(int w, int h, const char *name,
const rfb::PixelFormat& serverPF,
CConn* cc_)
: Fl_Window(w, h), cc(cc_), offscreen(NULL), overlay(NULL),
firstUpdate(true),
delayedFullscreen(false), delayedDesktopSize(false),
keyboardGrabbed(false), mouseGrabbed(false),
statsLastUpdates(0), statsLastPixels(0), statsLastPosition(0),
statsGraph(NULL)
{
Fl_Group* group;
// Dummy group to prevent FLTK from moving our widgets around
group = new Fl_Group(0, 0, w, h);
group->resizable(NULL);
resizable(group);
viewport = new Viewport(w, h, serverPF, cc);
// Position will be adjusted later
hscroll = new Fl_Scrollbar(0, 0, 0, 0);
vscroll = new Fl_Scrollbar(0, 0, 0, 0);
hscroll->type(FL_HORIZONTAL);
hscroll->callback(handleScroll, this);
vscroll->callback(handleScroll, this);
group->end();
callback(handleClose, this);
setName(name);
OptionsDialog::addCallback(handleOptions, this);
// Some events need to be caught globally
if (instances.size() == 0)
Fl::add_handler(fltkHandle);
instances.insert(this);
// Hack. See below...
Fl::event_dispatch(fltkDispatch);
// Support for -geometry option. Note that although we do support
// negative coordinates, we do not support -XOFF-YOFF (ie
// coordinates relative to the right edge / bottom edge) at this
// time.
int geom_x = 0, geom_y = 0;
if (strcmp(geometry, "") != 0) {
int matched;
matched = sscanf((const char*)geometry, "+%d+%d", &geom_x, &geom_y);
if (matched == 2) {
force_position(1);
} else {
int geom_w, geom_h;
matched = sscanf((const char*)geometry, "%dx%d+%d+%d", &geom_w, &geom_h, &geom_x, &geom_y);
switch (matched) {
case 4:
force_position(1);
/* fall through */
case 2:
w = geom_w;
h = geom_h;
break;
default:
geom_x = geom_y = 0;
vlog.error(_("Invalid geometry specified!"));
}
}
}
// Many window managers don't properly resize overly large windows,
// so we'll have to do some sanity checks ourselves here
int sx, sy, sw, sh;
if (force_position()) {
Fl::screen_work_area(sx, sy, sw, sh, geom_x, geom_y);
} else {
int mx, my;
// If we don't explicitly request a position then we don't know which
// monitor the window manager might place us on. Assume the popular
// behaviour of following the cursor.
Fl::get_mouse(mx, my);
Fl::screen_work_area(sx, sy, sw, sh, mx, my);
}
if ((w > sw) || (h > sh)) {
vlog.info(_("Reducing window size to fit on current monitor"));
if (w > sw)
w = sw;
if (h > sh)
h = sh;
}
#ifdef __APPLE__
// On OS X we can do the maximize thing properly before the
// window is showned. Other platforms handled further down...
if (maximize) {
int dummy;
Fl::screen_work_area(dummy, dummy, w, h, geom_x, geom_y);
}
#endif
if (force_position()) {
resize(geom_x, geom_y, w, h);
} else {
size(w, h);
}
if (fullScreen) {
// Hack: Window managers seem to be rather crappy at respecting
// fullscreen hints on initial windows. So on X11 we'll have to
// wait until after we've been mapped.
#if defined(WIN32) || defined(__APPLE__)
fullscreen_on();
#else
delayedFullscreen = true;
#endif
}
show();
// Full screen events are not sent out for a hidden window,
// so send a fake one here to set up things properly.
if (fullscreen_active())
handle(FL_FULLSCREEN);
// Unfortunately, current FLTK does not allow us to set the
// maximized property on Windows and X11 before showing the window.
// See STR #2083 and STR #2178
#ifndef __APPLE__
if (maximize) {
maximizeWindow();
}
#endif
// Adjust layout now that we're visible and know our final size
repositionWidgets();
if (delayedFullscreen) {
// Hack: Fullscreen requests may be ignored, so we need a timeout for
// when we should stop waiting. We also really need to wait for the
// resize, which can come after the fullscreen event.
Fl::add_timeout(0.5, handleFullscreenTimeout, this);
fullscreen_on();
}
// Throughput graph for debugging
if (vlog.getLevel() >= LogWriter::LEVEL_DEBUG) {
memset(&stats, 0, sizeof(stats));
Fl::add_timeout(0, handleStatsTimeout, this);
}
// Show hint about menu key
Fl::add_timeout(0.5, menuOverlay, this);
// By default we get a slight delay when we warp the pointer, something
// we don't want or we'll get jerky movement
#ifdef __APPLE__
CGEventSourceRef event = CGEventSourceCreate(kCGEventSourceStateCombinedSessionState);
CGEventSourceSetLocalEventsSuppressionInterval(event, 0);
CFRelease(event);
#endif
}
DesktopWindow::~DesktopWindow()
{
// Unregister all timeouts in case they get a change tro trigger
// again later when this object is already gone.
Fl::remove_timeout(handleGrab, this);
Fl::remove_timeout(handleResizeTimeout, this);
Fl::remove_timeout(handleFullscreenTimeout, this);
Fl::remove_timeout(handleEdgeScroll, this);
Fl::remove_timeout(handleStatsTimeout, this);
Fl::remove_timeout(menuOverlay, this);
Fl::remove_timeout(updateOverlay, this);
OptionsDialog::removeCallback(handleOptions);
delete overlay;
delete offscreen;
delete statsGraph;
instances.erase(this);
if (instances.size() == 0)
Fl::remove_handler(fltkHandle);
Fl::event_dispatch(Fl::handle_);
// FLTK automatically deletes all child widgets, so we shouldn't touch
// them ourselves here
}
const rfb::PixelFormat &DesktopWindow::getPreferredPF()
{
return viewport->getPreferredPF();
}
void DesktopWindow::setName(const char *name)
{
char windowNameStr[256];
snprintf(windowNameStr, 256, "%.240s - TigerVNC", name);
copy_label(windowNameStr);
}
// Copy the areas of the framebuffer that have been changed (damaged)
// to the displayed window.
void DesktopWindow::updateWindow()
{
if (firstUpdate) {
if (cc->server.supportsSetDesktopSize) {
// Hack: Wait until we're in the proper mode and position until
// resizing things, otherwise we might send the wrong thing.
if (delayedFullscreen)
delayedDesktopSize = true;
else
handleDesktopSize();
}
firstUpdate = false;
}
viewport->updateWindow();
}
void DesktopWindow::resizeFramebuffer(int new_w, int new_h)
{
bool maximized;
if ((new_w == viewport->w()) && (new_h == viewport->h()))
return;
maximized = false;
#ifdef WIN32
WINDOWPLACEMENT wndpl;
memset(&wndpl, 0, sizeof(WINDOWPLACEMENT));
wndpl.length = sizeof(WINDOWPLACEMENT);
GetWindowPlacement(fl_xid(this), &wndpl);
if (wndpl.showCmd == SW_SHOWMAXIMIZED)
maximized = true;
#elif defined(__APPLE__)
if (cocoa_win_is_zoomed(this))
maximized = true;
#else
Atom net_wm_state = XInternAtom (fl_display, "_NET_WM_STATE", 0);
Atom net_wm_state_maximized_vert = XInternAtom (fl_display, "_NET_WM_STATE_MAXIMIZED_VERT", 0);
Atom net_wm_state_maximized_horz = XInternAtom (fl_display, "_NET_WM_STATE_MAXIMIZED_HORZ", 0);
Atom type;
int format;
unsigned long nitems, remain;
Atom *atoms;
XGetWindowProperty(fl_display, fl_xid(this), net_wm_state, 0, 1024, False, XA_ATOM, &type, &format, &nitems, &remain, (unsigned char**)&atoms);
for (unsigned long i = 0;i < nitems;i++) {
if ((atoms[i] == net_wm_state_maximized_vert) ||
(atoms[i] == net_wm_state_maximized_horz)) {
maximized = true;
break;
}
}
XFree(atoms);
#endif
// If we're letting the viewport match the window perfectly, then
// keep things that way for the new size, otherwise just keep things
// like they are.
if (!fullscreen_active() && !maximized) {
if ((w() == viewport->w()) && (h() == viewport->h()))
size(new_w, new_h);
else {
// Make sure the window isn't too big. We do this manually because
// we have to disable the window size restriction (and it isn't
// entirely trustworthy to begin with).
if ((w() > new_w) || (h() > new_h))
size(__rfbmin(w(), new_w), __rfbmin(h(), new_h));
}
}
viewport->size(new_w, new_h);
repositionWidgets();
}
void DesktopWindow::setCursor(int width, int height,
const rfb::Point& hotspot,
const uint8_t* data)
{
viewport->setCursor(width, height, hotspot, data);
}
void DesktopWindow::setCursorPos(const rfb::Point& pos)
{
if (!mouseGrabbed) {
// Do nothing if we do not have the mouse captured.
return;
}
#if defined(WIN32)
SetCursorPos(pos.x + x_root() + viewport->x(),
pos.y + y_root() + viewport->y());
#elif defined(__APPLE__)
CGPoint new_pos;
new_pos.x = pos.x + x_root() + viewport->x();
new_pos.y = pos.y + y_root() + viewport->y();
CGWarpMouseCursorPosition(new_pos);
#else // Assume this is Xlib
Window rootwindow = DefaultRootWindow(fl_display);
XWarpPointer(fl_display, rootwindow, rootwindow, 0, 0, 0, 0,
pos.x + x_root() + viewport->x(),
pos.y + y_root() + viewport->y());
#endif
}
void DesktopWindow::show()
{
Fl_Window::show();
#if !defined(WIN32) && !defined(__APPLE__)
XEvent e;
// Request ability to grab keyboard under Xwayland
e.xany.type = ClientMessage;
e.xany.window = fl_xid(this);
e.xclient.message_type = XInternAtom (fl_display, "_XWAYLAND_MAY_GRAB_KEYBOARD", 0);
e.xclient.format = 32;
e.xclient.data.l[0] = 1;
e.xclient.data.l[1] = 0;
e.xclient.data.l[2] = 0;
e.xclient.data.l[3] = 0;
e.xclient.data.l[4] = 0;
XSendEvent(fl_display, RootWindow(fl_display, fl_screen), 0, SubstructureNotifyMask | SubstructureRedirectMask, &e);
#endif
}
void DesktopWindow::draw()
{
bool redraw;
int X, Y, W, H;
// X11 needs an off screen buffer for compositing to avoid flicker,
// and alpha blending doesn't work for windows on Win32
#if !defined(__APPLE__)
// Adjust offscreen surface dimensions
if ((offscreen == NULL) ||
(offscreen->width() != w()) || (offscreen->height() != h())) {
delete offscreen;
offscreen = new Surface(w(), h());
}
#endif
// Active area inside scrollbars
W = w() - (vscroll->visible() ? vscroll->w() : 0);
H = h() - (hscroll->visible() ? hscroll->h() : 0);
// Full redraw?
redraw = (damage() & ~FL_DAMAGE_CHILD);
// Simplify the clip region to a simple rectangle in order to
// properly draw all the layers even if they only partially overlap
if (redraw)
X = Y = 0;
else
fl_clip_box(0, 0, W, H, X, Y, W, H);
fl_push_no_clip();
fl_push_clip(X, Y, W, H);
// Redraw background only on full redraws
if (redraw) {
if (offscreen)
offscreen->clear(40, 40, 40);
else
fl_rectf(0, 0, W, H, 40, 40, 40);
}
if (offscreen) {
viewport->draw(offscreen);
viewport->clear_damage();
} else {
if (redraw)
draw_child(*viewport);
else
update_child(*viewport);
}
// Debug graph (if active)
if (statsGraph) {
int ox, oy, ow, oh;
ox = X = w() - statsGraph->width() - 30;
oy = Y = h() - statsGraph->height() - 30;
ow = statsGraph->width();
oh = statsGraph->height();
fl_clip_box(ox, oy, ow, oh, ox, oy, ow, oh);
if ((ow != 0) && (oh != 0)) {
if (offscreen)
statsGraph->blend(offscreen, ox - X, oy - Y, ox, oy, ow, oh, 204);
else
statsGraph->blend(ox - X, oy - Y, ox, oy, ow, oh, 204);
}
}
// Overlay (if active)
if (overlay) {
int ox, oy, ow, oh;
int sx, sy, sw, sh;
// Make sure it's properly seen by adjusting it relative to the
// primary screen rather than the entire window
if (fullscreen_active()) {
assert(Fl::screen_count() >= 1);
rfb::Rect windowRect, screenRect;
windowRect.setXYWH(x(), y(), w(), h());
bool foundEnclosedScreen = false;
for (int i = 0; i < Fl::screen_count(); i++) {
Fl::screen_xywh(sx, sy, sw, sh, i);
// The screen with the smallest index that are enclosed by
// the viewport will be used for showing the overlay.
screenRect.setXYWH(sx, sy, sw, sh);
if (screenRect.enclosed_by(windowRect)) {
foundEnclosedScreen = true;
break;
}
}
// If no monitor inside the viewport was found,
// use the one primary instead.
if (!foundEnclosedScreen)
Fl::screen_xywh(sx, sy, sw, sh, 0);
// Adjust the coordinates so they are relative to the viewport.
sx -= x();
sy -= y();
} else {
sx = 0;
sy = 0;
sw = w();
}
ox = X = sx + (sw - overlay->width()) / 2;
oy = Y = sy + 50;
ow = overlay->width();
oh = overlay->height();
fl_clip_box(ox, oy, ow, oh, ox, oy, ow, oh);
if ((ow != 0) && (oh != 0)) {
if (offscreen)
overlay->blend(offscreen, ox - X, oy - Y, ox, oy, ow, oh, overlayAlpha);
else
overlay->blend(ox - X, oy - Y, ox, oy, ow, oh, overlayAlpha);
}
}
// Flush offscreen surface to screen
if (offscreen) {
fl_clip_box(0, 0, w(), h(), X, Y, W, H);
offscreen->draw(X, Y, X, Y, W, H);
}
fl_pop_clip();
fl_pop_clip();
// Finally the scrollbars
if (redraw) {
draw_child(*hscroll);
draw_child(*vscroll);
} else {
update_child(*hscroll);
update_child(*vscroll);
}
}
void DesktopWindow::setLEDState(unsigned int state)
{
viewport->setLEDState(state);
}
void DesktopWindow::handleClipboardRequest()
{
viewport->handleClipboardRequest();
}
void DesktopWindow::handleClipboardAnnounce(bool available)
{
viewport->handleClipboardAnnounce(available);
}
void DesktopWindow::handleClipboardData(const char* data)
{
viewport->handleClipboardData(data);
}
void DesktopWindow::resize(int x, int y, int w, int h)
{
bool resizing;
#if ! (defined(WIN32) || defined(__APPLE__))
// X11 window managers will treat a resize to cover the entire
// monitor as a request to go full screen. Make sure we avoid this.
if (!fullscreen_active()) {
bool resize_req;
// If there is no X11 window, then this must be a resize request,
// not a notification from the X server.
if (!shown())
resize_req = true;
else {
// Otherwise we need to get the real window coordinates to tell
// the difference
XWindowAttributes actual;
Window cr;
int wx, wy;
XGetWindowAttributes(fl_display, fl_xid(this), &actual);
XTranslateCoordinates(fl_display, fl_xid(this), actual.root,
0, 0, &wx, &wy, &cr);
// Actual resize request?
if ((wx != x) || (wy != y) ||
(actual.width != w) || (actual.height != h))
resize_req = true;
else
resize_req = false;
}
if (resize_req) {
for (int i = 0;i < Fl::screen_count();i++) {
int sx, sy, sw, sh;
Fl::screen_xywh(sx, sy, sw, sh, i);
// We can't trust x and y if the window isn't mapped as the
// window manager might adjust those numbers
if (shown() && ((sx != x) || (sy != y)))
continue;
if ((sw != w) || (sh != h))
continue;
vlog.info(_("Adjusting window size to avoid accidental full-screen request"));
// Assume a panel of some form and adjust the height
h -= 40;
}
}
}
#endif
if ((this->w() != w) || (this->h() != h))
resizing = true;
else
resizing = false;
Fl_Window::resize(x, y, w, h);
if (resizing) {
// Try to get the remote size to match our window size, provided
// the following conditions are true:
//
// a) The user has this feature turned on
// b) The server supports it
// c) We're not still waiting for a chance to handle DesktopSize
// d) We're not still waiting for startup fullscreen to kick in
//
if (not firstUpdate and not delayedFullscreen and
::remoteResize and cc->server.supportsSetDesktopSize) {
// We delay updating the remote desktop as we tend to get a flood
// of resize events as the user is dragging the window.
Fl::remove_timeout(handleResizeTimeout, this);
Fl::add_timeout(0.5, handleResizeTimeout, this);
}
repositionWidgets();
}
// Some systems require a grab after the window size has been changed.
// Otherwise they might hold on to displays, resulting in them being unusable.
maybeGrabKeyboard();
}
void DesktopWindow::menuOverlay(void* data)
{
DesktopWindow *self;
self = (DesktopWindow*)data;
if (strcmp((const char*)menuKey, "") != 0) {
self->setOverlay(_("Press %s to open the context menu"),
(const char*)menuKey);
}
}
void DesktopWindow::setOverlay(const char* text, ...)
{
const Fl_Fontsize fontsize = 16;
const int margin = 10;
va_list ap;
char textbuf[1024];
Fl_Image_Surface *surface;
Fl_RGB_Image* imageText;
Fl_RGB_Image* image;
unsigned char* buffer;
int x, y;
int w, h;
unsigned char* a;
const unsigned char* b;
delete overlay;
Fl::remove_timeout(updateOverlay, this);
va_start(ap, text);
vsnprintf(textbuf, sizeof(textbuf), text, ap);
textbuf[sizeof(textbuf)-1] = '\0';
va_end(ap);
#if !defined(WIN32) && !defined(__APPLE__)
// FLTK < 1.3.5 crashes if fl_gc is unset
if (!fl_gc)
fl_gc = XDefaultGC(fl_display, 0);
#endif
fl_font(FL_HELVETICA, fontsize);
w = 0;
fl_measure(textbuf, w, h);
// Margins
w += margin * 2 * 2;
h += margin * 2;
surface = new Fl_Image_Surface(w, h);
surface->set_current();
fl_rectf(0, 0, w, h, 0, 0, 0);
fl_font(FL_HELVETICA, fontsize);
fl_color(FL_WHITE);
fl_draw(textbuf, 0, 0, w, h, FL_ALIGN_CENTER);
imageText = surface->image();
delete surface;
Fl_Display_Device::display_device()->set_current();
buffer = new unsigned char[w * h * 4];
image = new Fl_RGB_Image(buffer, w, h, 4);
a = buffer;
for (x = 0;x < image->w() * image->h();x++) {
a[0] = a[1] = a[2] = 0x40;
a[3] = 0xcc;
a += 4;
}
a = buffer;
b = (const unsigned char*)imageText->data()[0];
for (y = 0;y < h;y++) {
for (x = 0;x < w;x++) {
unsigned char alpha;
alpha = *b;
a[0] = (unsigned)a[0] * (255 - alpha) / 255 + alpha;
a[1] = (unsigned)a[1] * (255 - alpha) / 255 + alpha;
a[2] = (unsigned)a[2] * (255 - alpha) / 255 + alpha;
a[3] = 255 - (255 - a[3]) * (255 - alpha) / 255;
a += 4;
b += imageText->d();
}
if (imageText->ld() != 0)
b += imageText->ld() - w * imageText->d();
}
delete imageText;
overlay = new Surface(image);
overlayAlpha = 0;
gettimeofday(&overlayStart, NULL);
delete image;
delete [] buffer;
Fl::add_timeout(1.0/60, updateOverlay, this);
}
void DesktopWindow::updateOverlay(void *data)
{
DesktopWindow *self;
unsigned elapsed;
self = (DesktopWindow*)data;
elapsed = msSince(&self->overlayStart);
if (elapsed < 500) {
self->overlayAlpha = (unsigned)255 * elapsed / 500;
Fl::add_timeout(1.0/60, updateOverlay, self);
} else if (elapsed < 3500) {
self->overlayAlpha = 255;
Fl::add_timeout(3.0, updateOverlay, self);
} else if (elapsed < 4000) {
self->overlayAlpha = (unsigned)255 * (4000 - elapsed) / 500;
Fl::add_timeout(1.0/60, updateOverlay, self);
} else {
delete self->overlay;
self->overlay = NULL;
}
self->damage(FL_DAMAGE_USER1);
}
int DesktopWindow::handle(int event)
{
switch (event) {
case FL_FULLSCREEN:
fullScreen.setParam(fullscreen_active());
// Update scroll bars
repositionWidgets();
if (fullscreen_active())
maybeGrabKeyboard();
else
ungrabKeyboard();
break;
case FL_ENTER:
if (keyboardGrabbed)
grabPointer();
/* fall through */
case FL_LEAVE:
case FL_DRAG:
case FL_MOVE:
if (mouseGrabbed) {
// We don't get FL_LEAVE with a grabbed pointer, so check manually
if ((Fl::event_x() < 0) || (Fl::event_x() >= w()) ||
(Fl::event_y() < 0) || (Fl::event_y() >= h())) {
ungrabPointer();
}
// We also don't get sensible coordinates on zaphod setups
#if !defined(WIN32) && !defined(__APPLE__)
if ((fl_xevent != NULL) && (fl_xevent->type == MotionNotify) &&
(((XMotionEvent*)fl_xevent)->root !=
XRootWindow(fl_display, fl_screen))) {
ungrabPointer();
}
#endif
}
if (fullscreen_active()) {
// calculate width of "edge" regions
edge_scroll_size_x = viewport->w() / EDGE_SCROLL_SIZE;
edge_scroll_size_y = viewport->h() / EDGE_SCROLL_SIZE;
// if cursor is near the edge of the viewport, scroll
if (((viewport->x() < 0) && (Fl::event_x() < edge_scroll_size_x)) ||
((viewport->x() + viewport->w() >= w()) && (Fl::event_x() >= w() - edge_scroll_size_x)) ||
((viewport->y() < 0) && (Fl::event_y() < edge_scroll_size_y)) ||
((viewport->y() + viewport->h() >= h()) && (Fl::event_y() >= h() - edge_scroll_size_y))) {
if (!Fl::has_timeout(handleEdgeScroll, this))
Fl::add_timeout(EDGE_SCROLL_SECONDS_PER_FRAME, handleEdgeScroll, this);
}
}
// Continue processing so that the viewport also gets mouse events
break;
}
return Fl_Window::handle(event);
}
int DesktopWindow::fltkDispatch(int event, Fl_Window *win)
{
int ret;
// FLTK keeps spamming bogus FL_MOVE events if _any_ X event is
// received with the mouse pointer outside our windows
// https://github.com/fltk/fltk/issues/76
if ((event == FL_MOVE) && (win == NULL))
return 0;
ret = Fl::handle_(event, win);
// This is hackish and the result of the dodgy focus handling in FLTK.
// The basic problem is that FLTK's view of focus and the system's tend
// to differ, and as a result we do not see all the FL_FOCUS events we
// need. Fortunately we can grab them here...
DesktopWindow *dw = dynamic_cast<DesktopWindow*>(win);
if (dw) {
switch (event) {
// Focus might not stay with us just because we have grabbed the
// keyboard. E.g. we might have sub windows, or we're not using
// all monitors and the user clicked on another application.
// Make sure we update our grabs with the focus changes.
case FL_FOCUS:
dw->maybeGrabKeyboard();
break;
case FL_UNFOCUS:
if (fullscreenSystemKeys) {
dw->ungrabKeyboard();
}
break;
case FL_RELEASE:
// We usually fail to grab the mouse if a mouse button was
// pressed when we gained focus (e.g. clicking on our window),
// so we may need to try again when the button is released.
// (We do it here rather than handle() because a window does not
// see FL_RELEASE events if a child widget grabs it first)
if (dw->keyboardGrabbed && !dw->mouseGrabbed)
dw->grabPointer();
break;
}
}
return ret;
}
int DesktopWindow::fltkHandle(int event)
{
switch (event) {
case FL_SCREEN_CONFIGURATION_CHANGED:
// Screens removed or added. Recreate fullscreen window if
// necessary. On Windows, adding a second screen only works
// reliable if we are using a timer. Otherwise, the window will
// not be resized to cover the new screen. A timer makes sense
// also on other systems, to make sure that whatever desktop
// environment has a chance to deal with things before we do.
// Please note that when using FullscreenSystemKeys on macOS, the
// display configuration cannot be changed: macOS will not detect
// added or removed screens and there will be no
// FL_SCREEN_CONFIGURATION_CHANGED event. This is by design:
// "When you capture a display, you have exclusive use of the
// display. Other applications and system services are not allowed
// to use the display or change its configuration. In addition,
// they are not notified of display changes"
Fl::remove_timeout(reconfigureFullscreen);
Fl::add_timeout(0.5, reconfigureFullscreen);
}
return 0;
}
void DesktopWindow::fullscreen_on()
{
bool allMonitors = !strcasecmp(fullScreenMode, "all");
bool selectedMonitors = !strcasecmp(fullScreenMode, "selected");
int top, bottom, left, right;
if (not selectedMonitors and not allMonitors) {
top = bottom = left = right = Fl::screen_num(x(), y(), w(), h());
} else {
int top_y, bottom_y, left_x, right_x;
int sx, sy, sw, sh;
std::set<int> monitors;
if (selectedMonitors and not allMonitors) {
std::set<int> selected = fullScreenSelectedMonitors.getParam();
monitors.insert(selected.begin(), selected.end());
} else {
for (int i = 0; i < Fl::screen_count(); i++) {
monitors.insert(i);
}
}
// If no monitors were found in the selected monitors case, we want
// to explicitly use the window's current monitor.
if (monitors.size() == 0) {
monitors.insert(Fl::screen_num(x(), y(), w(), h()));
}
// If there are monitors selected, calculate the dimensions
// of the frame buffer, expressed in the monitor indices that
// limits it.
std::set<int>::iterator it = monitors.begin();
// Get first monitor dimensions.
Fl::screen_xywh(sx, sy, sw, sh, *it);
top = bottom = left = right = *it;
top_y = sy;
bottom_y = sy + sh;
left_x = sx;
right_x = sx + sw;
// Keep going through the rest of the monitors.