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Add support for multiple displays/windows
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,246 @@ | ||
| // LAF Library | ||
| // Copyright (c) 2019-2021 Igara Studio S.A. | ||
| // | ||
| // This file is released under the terms of the MIT license. | ||
| // Read LICENSE.txt for more information. | ||
|
|
||
| #include "base/clamp.h" | ||
| #include "gfx/hsv.h" | ||
| #include "gfx/rgb.h" | ||
| #include "os/os.h" | ||
|
|
||
| #include <algorithm> | ||
| #include <cstdarg> | ||
| #include <cstdio> | ||
| #include <vector> | ||
|
|
||
| static std::vector<os::DisplayRef> displays; | ||
|
|
||
| const char* lines[] = { "A: Switch mouse cursor to Arrow <-> Move", | ||
| "H: Hide window (or show all windows again)", | ||
| "", | ||
| "C: Change display frame to content", | ||
| "F: Change display content to frame", | ||
| "W: Change display content to workarea", | ||
| "", | ||
| "D: Duplicate display", | ||
| "", | ||
| "Q: Close all windows", | ||
| "ESC: Close this display" }; | ||
|
|
||
| static void redraw_display(os::Display* display) | ||
| { | ||
| os::Surface* s = display->surface(); | ||
| os::Paint paint; | ||
| paint.color(gfx::rgba(0, 0, 0)); | ||
| s->drawRect(display->bounds(), paint); | ||
|
|
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| paint.color(gfx::rgba(255, 255, 255)); | ||
|
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| char buf[256]; | ||
| int y = 12; | ||
|
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| gfx::Rect rc = display->frame(); | ||
| std::sprintf(buf, "Frame = (%d %d %d %d)", rc.x, rc.y, rc.w, rc.h); | ||
| os::draw_text(s, nullptr, buf, gfx::Point(0, y), &paint); | ||
| y += 12; | ||
|
|
||
| rc = display->contentRect(); | ||
| std::sprintf(buf, "Content Rect = (%d %d %d %d)", rc.x, rc.y, rc.w, rc.h); | ||
| os::draw_text(s, nullptr, buf, gfx::Point(0, y), &paint); | ||
| y += 12; | ||
|
|
||
| for (auto line : lines) { | ||
| y += 12; | ||
| os::draw_text(s, nullptr, line, gfx::Point(0, y), &paint); | ||
| } | ||
|
|
||
| paint.style(os::Paint::Style::Stroke); | ||
| s->drawRect(display->bounds(), paint); | ||
| } | ||
|
|
||
| static os::DisplayRef add_display(const std::string& title, | ||
| const os::DisplaySpec& spec) | ||
| { | ||
| os::DisplayRef newDisplay = os::instance()->makeDisplay(spec); | ||
| newDisplay->setNativeMouseCursor(os::kArrowCursor); | ||
| newDisplay->setTitle(title); | ||
| newDisplay->handleResize = redraw_display; | ||
| displays.emplace_back(newDisplay); | ||
|
|
||
| redraw_display(newDisplay.get()); | ||
| return newDisplay; | ||
| } | ||
|
|
||
| static void check_show_all_displays() | ||
| { | ||
| // If all displays are hidden, show then again | ||
| auto hidden = std::count_if(displays.begin(), displays.end(), | ||
| [](os::DisplayRef display){ | ||
| return !display->isVisible(); | ||
| }); | ||
| if (hidden == displays.size()) { | ||
| std::for_each(displays.begin(), displays.end(), | ||
| [](os::DisplayRef display){ | ||
| display->setVisible(true); | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| static void destroy_display(const os::DisplayRef& display) | ||
| { | ||
| auto it = std::find(displays.begin(), displays.end(), display); | ||
| if (it != displays.end()) | ||
| displays.erase(it); | ||
|
|
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| check_show_all_displays(); | ||
| } | ||
|
|
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| int app_main(int argc, char* argv[]) | ||
| { | ||
| auto system = os::make_system(); | ||
| system->setAppMode(os::AppMode::GUI); | ||
|
|
||
| // Create four windows for each screen with the bounds of the | ||
| // workarea. | ||
| os::ScreenList screens; | ||
| system->listScreens(screens); | ||
| char chr = 'A'; | ||
| for (os::ScreenRef& screen : screens) { | ||
| os::DisplaySpec spec; | ||
| spec.titled(true); | ||
| spec.position(os::DisplaySpec::Position::Frame); | ||
| spec.frame(screen->workarea()); | ||
| spec.screen(screen); | ||
|
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||
| gfx::PointF pos[4] = { gfx::PointF(0.0, 0.0), | ||
| gfx::PointF(0.5, 0.0), | ||
| gfx::PointF(0.0, 0.5), | ||
| gfx::PointF(0.5, 0.5) }; | ||
| for (auto& p : pos) { | ||
| os::DisplaySpec s = spec; | ||
| gfx::Rect frame = s.frame(); | ||
| frame.x += frame.w*p.x; | ||
| frame.y += frame.h*p.y; | ||
| frame.w /= 2; | ||
| frame.h /= 2; | ||
| s.frame(frame); | ||
| add_display(std::string(1, chr++), s); | ||
| } | ||
| } | ||
|
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||
| system->finishLaunching(); | ||
| system->activateApp(); | ||
|
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| os::EventQueue* queue = system->eventQueue(); | ||
| os::Event ev; | ||
| while (!displays.empty()) { | ||
| queue->getEvent(ev, true); | ||
|
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||
| switch (ev.type()) { | ||
|
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| case os::Event::CloseApp: | ||
| displays.clear(); // Close all displays | ||
| break; | ||
|
|
||
| case os::Event::CloseDisplay: | ||
| destroy_display(ev.display()); | ||
| break; | ||
|
|
||
| case os::Event::ResizeDisplay: | ||
| redraw_display(ev.display().get()); | ||
| ev.display()->invalidate(); | ||
| break; | ||
|
|
||
| case os::Event::KeyDown: | ||
| switch (ev.scancode()) { | ||
|
|
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| case os::kKeyQ: | ||
| displays.clear(); | ||
| break; | ||
|
|
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| case os::kKeyEsc: | ||
| destroy_display(ev.display()); | ||
| break; | ||
|
|
||
| // Switch between Arrow/Move cursor in this specific display | ||
| case os::kKeyA: | ||
| ev.display()->setNativeMouseCursor( | ||
| ev.display()->nativeMouseCursor() == os::kArrowCursor ? | ||
| os::kMoveCursor: | ||
| os::kArrowCursor); | ||
| break; | ||
|
|
||
| case os::kKeyH: | ||
| ev.display()->setVisible(!ev.display()->isVisible()); | ||
| check_show_all_displays(); | ||
| break; | ||
|
|
||
| // Duplicate display | ||
| case os::kKeyD: { | ||
| std::string title = ev.display()->title(); | ||
| os::DisplaySpec spec; | ||
| spec.position(os::DisplaySpec::Position::Frame); | ||
| spec.frame(ev.display()->frame()); | ||
| add_display(title, spec); | ||
| break; | ||
| } | ||
|
|
||
| case os::kKeyF: | ||
| case os::kKeyC: | ||
| case os::kKeyW: { | ||
| std::string title = ev.display()->title(); | ||
| os::DisplaySpec spec; | ||
| if (ev.scancode() == os::kKeyF) { | ||
| spec.position(os::DisplaySpec::Position::ContentRect); | ||
| spec.contentRect(ev.display()->frame()); | ||
| } | ||
| else if (ev.scancode() == os::kKeyC) { | ||
| spec.position(os::DisplaySpec::Position::Frame); | ||
| spec.frame(ev.display()->contentRect()); | ||
| } | ||
| else if (ev.scancode() == os::kKeyW) { | ||
| spec.position(os::DisplaySpec::Position::Frame); | ||
| spec.frame(ev.display()->screen()->workarea()); | ||
| } | ||
|
|
||
| // TODO add a new os::Display::setSpec() method instead of re-creating display | ||
| destroy_display(ev.display()); | ||
| add_display(title, spec); | ||
| break; | ||
| } | ||
|
|
||
| case os::kKeyLeft: | ||
| case os::kKeyUp: | ||
| case os::kKeyRight: | ||
| case os::kKeyDown: { | ||
| std::string title = ev.display()->title(); | ||
| os::DisplaySpec spec; | ||
| gfx::Rect rc = ev.display()->frame(); | ||
|
|
||
| switch (ev.scancode()) { | ||
| case os::kKeyLeft: rc.x -= rc.w; break; | ||
| case os::kKeyUp: rc.y -= rc.h; break; | ||
| case os::kKeyRight: rc.x += rc.w; break; | ||
| case os::kKeyDown: rc.y += rc.h; break; | ||
| } | ||
|
|
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| spec.position(os::DisplaySpec::Position::Frame); | ||
| spec.frame(rc); | ||
|
|
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| destroy_display(ev.display()); | ||
| add_display(title, spec); | ||
| break; | ||
| } | ||
|
|
||
| } | ||
| break; | ||
|
|
||
| default: | ||
| // Do nothing | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| return 0; | ||
| } |
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