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#include <app/RackScrollWidget.hpp>
#include <app/Scene.hpp>
#include <app/RackWidget.hpp>
#include <app/ModuleWidget.hpp>
#include <app/PortWidget.hpp>
#include <window/Window.hpp>
#include <context.hpp>
#include <settings.hpp>
namespace rack {
namespace app {
struct RackScrollWidget::Internal {
/** 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 * zoomWidget->getZoom() - math::Vec(30, 30);
}
math::Vec RackScrollWidget::getGridOffset() {
return (offset / zoomWidget->getZoom() - RACK_OFFSET) / RACK_GRID_SIZE;
}
void RackScrollWidget::setGridOffset(math::Vec gridOffset) {
offset = (gridOffset * RACK_GRID_SIZE + RACK_OFFSET) * zoomWidget->getZoom();
}
float RackScrollWidget::getZoom() {
return zoomWidget->getZoom();
}
void RackScrollWidget::setZoom(float zoom) {
setZoom(zoom, getSize().div(2));
}
void RackScrollWidget::setZoom(float zoom, math::Vec pivot) {
zoom = math::clamp(zoom, std::pow(2.f, -2), std::pow(2.f, 2));
offset = (offset + pivot) * (zoom / zoomWidget->getZoom()) - pivot;
zoomWidget->setZoom(zoom);
}
void RackScrollWidget::step() {
float zoom = getZoom();
// 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 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(0.9));
// 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 certain widgets near the edge of the screen
math::Vec pos = APP->scene->mousePos - box.pos;
math::Rect viewport = getViewport(box.zeroPos());
widget::Widget* dw = APP->event->getDraggedWidget();
if (dw && APP->event->dragButton == GLFW_MOUSE_BUTTON_LEFT &&
(dynamic_cast<RackWidget*>(dw) || dynamic_cast<ModuleWidget*>(dw) || dynamic_cast<PortWidget*>(dw))) {
float margin = 1.0;
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;
float zoom = getZoom() * std::pow(2.f, zoomDelta);
setZoom(zoom, 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) {
float zoom = getZoom() * std::pow(2.f, -0.5f);
setZoom(zoom, e.pos);
e.consume(this);
}
if (e.button == GLFW_MOUSE_BUTTON_5) {
float zoom = getZoom() * std::pow(2.f, 0.5f);
setZoom(zoom, e.pos);
e.consume(this);
}
}
}
} // namespace app
} // namespace rack
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