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#include <app/RackScrollWidget.hpp>
#include <app/Scene.hpp>
#include <Window.hpp>
#include <context.hpp>
#include <settings.hpp>
namespace rack {
namespace app {
struct RackScrollWidget::Internal {
/** The pivot point for zooming */
math::Vec zoomPos;
/** For viewport expanding */
float oldZoom = 0.f;
math::Vec oldOffset;
};
RackScrollWidget::RackScrollWidget() {
internal = new Internal;
zoomWidget = new widget::ZoomWidget;
container->addChild(zoomWidget);
rackWidget = new RackWidget;
rackWidget->box.size = RACK_OFFSET.mult(2);
zoomWidget->addChild(rackWidget);
reset();
}
RackScrollWidget::~RackScrollWidget() {
delete internal;
}
void RackScrollWidget::reset() {
offset = RACK_OFFSET.mult(zoomWidget->zoom);
offset = offset.minus(math::Vec(30, 30));
}
void RackScrollWidget::step() {
// Compute zoom from exponential zoom
float zoom = std::pow(2.f, settings::zoom);
if (zoom != zoomWidget->zoom) {
// Set offset based on zoomPos
offset = offset.plus(internal->zoomPos).div(zoomWidget->zoom).mult(zoom).minus(internal->zoomPos);
// Set zoom
zoomWidget->setZoom(zoom);
}
internal->zoomPos = box.size.div(2);
// Compute module bounding box
math::Rect moduleBox = rackWidget->getModuleContainer()->getChildrenBoundingBox();
if (!moduleBox.size.isFinite())
moduleBox = math::Rect(RACK_OFFSET, math::Vec(0, 0));
// Expand moduleBox by half a screen size
math::Rect scrollBox = moduleBox;
scrollBox.pos = scrollBox.pos.mult(zoom);
scrollBox.size = scrollBox.size.mult(zoom);
scrollBox = scrollBox.grow(box.size.mult(0.6666));
// Expand to the current viewport box so that moving modules (and thus changing the module bounding box) doesn't clamp the scroll offset.
if (zoom == internal->oldZoom) {
math::Rect viewportBox;
viewportBox.pos = internal->oldOffset;
viewportBox.size = box.size;
scrollBox = scrollBox.expand(viewportBox);
}
// Reposition widgets
zoomWidget->box = scrollBox;
rackWidget->box.pos = scrollBox.pos.div(zoom).neg();
// Scroll rack if dragging cable near the edge of the screen
math::Vec pos = APP->scene->mousePos;
math::Rect viewport = getViewport(box.zeroPos());
if (rackWidget->incompleteCable) {
float margin = 20.0;
float speed = 15.0;
if (pos.x <= viewport.pos.x + margin)
offset.x -= speed;
if (pos.x >= viewport.pos.x + viewport.size.x - margin)
offset.x += speed;
if (pos.y <= viewport.pos.y + margin)
offset.y -= speed;
if (pos.y >= viewport.pos.y + viewport.size.y - margin)
offset.y += speed;
}
// Hide scrollbars if fullscreen
hideScrollbars = APP->window->isFullScreen();
ScrollWidget::step();
internal->oldOffset = offset;
internal->oldZoom = zoom;
}
void RackScrollWidget::draw(const DrawArgs& args) {
ScrollWidget::draw(args);
}
void RackScrollWidget::onHoverKey(const HoverKeyEvent& e) {
ScrollWidget::onHoverKey(e);
}
void RackScrollWidget::onHoverScroll(const HoverScrollEvent& e) {
if ((APP->window->getMods() & RACK_MOD_MASK) == RACK_MOD_CTRL) {
// Increase zoom
float zoomDelta = e.scrollDelta.y / 50 / 4;
if (settings::invertZoom)
zoomDelta *= -1;
settings::zoom += zoomDelta;
// Limit min/max depending on the direction of zooming
if (zoomDelta > 0.f)
settings::zoom = std::fmin(settings::zoom, settings::zoomMax);
else
settings::zoom = std::fmax(settings::zoom, settings::zoomMin);
internal->zoomPos = e.pos;
e.consume(this);
}
if (e.isConsumed())
return;
ScrollWidget::onHoverScroll(e);
}
void RackScrollWidget::onHover(const HoverEvent& e) {
ScrollWidget::onHover(e);
// Hide menu bar if fullscreen and moving mouse over the RackScrollWidget
if (APP->window->isFullScreen()) {
APP->scene->menuBar->hide();
}
}
void RackScrollWidget::onButton(const ButtonEvent& e) {
ScrollWidget::onButton(e);
if (e.isConsumed())
return;
// Zoom in/out with extra mouse buttons
if (e.action == GLFW_PRESS) {
if (e.button == GLFW_MOUSE_BUTTON_4) {
settings::zoom -= 0.5f;
settings::zoom = std::fmax(settings::zoom, settings::zoomMin);
e.consume(this);
}
if (e.button == GLFW_MOUSE_BUTTON_5) {
settings::zoom += 0.5f;
settings::zoom = std::fmin(settings::zoom, settings::zoomMax);
e.consume(this);
}
}
}
} // namespace app
} // namespace rack
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