Scrolling layout

WidgetsNew/examples/Example.cpp

@@ -2,9 +2,11 @@
 #include "GraphicApplication.hpp"
 
 #include "RootWidget.hpp"
-#include "AnimationTestWidget.hpp"
 #include "FloatingWidget.hpp"
 #include "DockWidget.hpp"
+#include "ScrollableWidget.hpp"
+
+#include "ScrollableLayout.hpp"
 
 using namespace tp;
 
@@ -21,8 +23,27 @@ using namespace tp;
 class WidgetApplication : public Application {
 public:
 	WidgetApplication() {
-		exampleNestedMenus();
-		// examplePopup();
+		exampleScrolling();
+	}
+
+	void exampleScrolling() {
+		static Widget widget;
+		static Widget content;
+		static ButtonWidget buttons[10];
+		static ScrollableBarWidget scrollBar;
+
+		mRootWidget.setRootWidget(&widget);
+
+		widget.addChild(&scrollBar);
+		widget.addChild(&content);
+
+		for (auto& button : buttons) {
+			content.addChild(&button);
+		}
+
+		widget.setLayout(new ScrollableLayout(&widget));
+
+		RootWidget::setWidgetArea(content, { 333, 333, 522, 522 });
 	}
 
 	void examplePopup() {
@@ -72,6 +93,22 @@ public:
 
 		menu2.addToMenu(&menu1);
 
+		// popup
+		{
+			buttons[0].setAction([&](){
+				buttons[10].setArea({ 30, 30, 100, 100 });
+				buttons[0].openPopup(&buttons[10]);
+			});
+
+			buttons[0].setText("open popup");
+
+			buttons[10].setAction([&](){
+				buttons[10].closePopup(&buttons[10]);
+			});
+
+			buttons[10].setText("close popup");
+		}
+
 		RootWidget::setWidgetArea(menu1, { 300, 100, 150, 500 });
 		RootWidget::setWidgetArea(menu2, { 100, 100, 150, 300 });
 	}
@@ -107,7 +144,7 @@ public:
 		((BasicLayout*)widgets[1].getLayout())->setLayoutPolicy(LayoutPolicy::Horizontal);
 	}
 
-	void setup1() {
+	void exampleDock() {
 		static DockWidget dock;
 		static FloatingMenu menu1;
 		static FloatingMenu menu2;
@@ -140,22 +177,8 @@ public:
 		buttons[5].setText("dock");
 		buttons[6].setText("undock");
 
-		// mLayoutWidget.addChild(&buttons[2]);
-
-		// mWidgetFloating.addChild(&buttons[0]);
-
-		// mRootWidget.setRootWidget(&mAnimationTestWidget);
-
-		// mAnimationTestWidget.addChild(&mWidgetFloating);
-		// mAnimationTestWidget.addChild(&mLayoutWidget);
-
 		RootWidget::setWidgetArea(menu2, { 300, 100, 150, 500 });
 		RootWidget::setWidgetArea(menu1, { 100, 100, 150, 300 });
-
-		// mWidgetFloating.addChild(&mLayoutWidget);
-
-		// mLayoutWidget.addChild(&buttons[0]);
-		// mLayoutWidget.addChild(&mLabel);
 	}
 
 	void processFrame(EventHandler* eventHandler, halnf deltaTime) override {
@@ -166,7 +189,7 @@ public:
 	void drawFrame(Canvas* canvas) override {
 		mRootWidget.drawFrame(*canvas);
 
-		drawDebug();
+		// drawDebug();
 	}
 
 	bool forceNewFrame() override {

WidgetsNew/private/layouts/BasicLayout.cpp

@@ -11,8 +11,10 @@ void BasicLayout::pickRect(bool vertical) {
 	auto current = getArea();
 	auto children = getChildrenEnclosure();
 	auto parent = getParentEnclosure();
-	RectF newArea = current;
 
+	children.shrinkFromCenter(-mLayoutMargin, true);
+
+	RectF newArea;
 	if (vertical) {
 		auto rangeY = pickRange(current.getRangeY(), children.getRangeY(), parent.getRangeY(), true);
 		newArea = RectF(current.getRangeX(), rangeY);
@@ -143,5 +145,5 @@ void BasicLayout::adjustLayout(bool vertical) {
 
 RectF BasicLayout::getAvailableChildArea() const {
 	auto out = WidgetLayout::getAvailableChildArea();
-	return out.scaleFromCenter(mLayoutMargin, true);
+	return out.shrinkFromCenter(mLayoutMargin, true);
 }

WidgetsNew/private/layouts/ScrollableLayout.cpp

@@ -0,0 +1,53 @@
+#include "ScrollableLayout.hpp"
+
+// fixme : this dependency should be removed
+#include "ScrollableWidget.hpp"
+
+using namespace tp;
+
+void ScrollableLayout::updateLayout(bool vertical) {
+	if (vertical) return;
+
+	// TODO : make better interface to get scroller and content widget
+	if (children().size() != 2) return;
+
+	auto scroller = dynamic_cast<ScrollableBarWidget*>(children().front());
+	auto content = children().back();
+
+	if (!scroller || !content) return;
+
+	updateWidgetRects(getArea(), content, scroller);
+}
+
+void ScrollableLayout::updateWidgetRects(const RectF& area, Widget* content, ScrollableBarWidget* scroller) const {
+	bool dir = scroller->getDirection();
+
+	// update content
+	// auto contentItems = content->getLayout()->getChildrenEnclosure();
+	// content->getLayout()->setArea(contentItems.shrinkFromCenter(-10, true));
+	content->getLayout()->pickRect(dir);
+
+	auto sizeFactor = (area.size[dir] / content->getLayout()->getArea().size[dir]);
+	auto splitFactor = 1 - ((sizeFactor > 1.f) ?  0 : mScrollerSize / area.size[!dir]);
+
+	auto holderArea = area.splitByFactorHL(splitFactor);
+	auto contentArea = content->getLayout()->getArea();
+	auto scrollerArea = area.splitByFactorHR(splitFactor);
+
+	scroller->updateSizeFactor(sizeFactor);
+
+	contentArea.pos[dir] = -scroller->getPosFactor() * contentArea.size[dir];
+	contentArea.size[!dir] = holderArea.size[!dir];
+	contentArea.pos[!dir] = 0;
+
+	scroller->getLayout()->setArea(scrollerArea);
+	content->getLayout()->setArea(contentArea);
+}
+
+RectF ScrollableLayout::getAvailableChildArea() const {
+	auto out = getArea();
+	// dont constrain on scroll axis
+	out.pos = -FLT_MAX / 4;
+	out.size = FLT_MAX / 2;
+	return out;
+}

WidgetsNew/private/managers/DebugManager.cpp

@@ -14,6 +14,9 @@ DebugManager tp::gDebugWidget;
 bool DebugManager::update(RootWidget* rootWidget, EventHandler& events) {
 	mRootWidget = rootWidget;
 
+	events.setEnableKeyEvents(true);
+	if (events.isPressed(InputID::D)) mDebug = !mDebug;
+
 	if (mDebug) {
 		auto area = rootWidget->mRoot.getAreaT();
 		area.size -= { 400, 0 };
@@ -53,12 +56,12 @@ bool DebugManager::update(RootWidget* rootWidget, EventHandler& events) {
 void DebugManager::drawDebug(RootWidget* rootWidget, Canvas& canvas) {
 	mRootWidget = rootWidget;
 
-	ImGui::Checkbox("Draw debug", &mDebug);
-
 	if (!mDebug) {
 		return;
 	}
 
+	// ImGui::Checkbox("Draw debug", &mDebug);
+
 	ImGui::SameLine(); ImGui::Text("To Toggle processing press k");
 
 	auto& upd = rootWidget->mUpdateManager;

WidgetsNew/private/managers/LayoutManager.cpp

@@ -2,6 +2,7 @@
 #include "DebugManager.hpp"
 
 #include "DockLayout.hpp"
+#include "ScrollableLayout.hpp"
 
 #include <algorithm>
 
@@ -91,6 +92,7 @@ int LayoutManager::getLayoutOrder(WidgetLayout* parent, WidgetLayout* child) con
 	auto policyChild = parent->getSizePolicy()[mVertical];
 
 	if (dynamic_cast<DockLayout*>(parent)) return -1;
+	// if (dynamic_cast<ScrollableLayout*>(parent)) return -1;
 
 	return sizePolicyDep[int(policyParent)][int(policyChild)];
 }

WidgetsNew/private/managers/UpdateManager.cpp

@@ -206,6 +206,6 @@ void UpdateManager::lockFocus(tp::Widget* widget) {
 }
 
 void UpdateManager::freeFocus(tp::Widget* widget) {
-	DEBUG_ASSERT(mFocusLockWidget == widget)
+	// DEBUG_ASSERT(mFocusLockWidget == widget)
 	mFocusLockWidget = nullptr;
 }

WidgetsNew/private/widgets/ScrollableWidget.cpp

@@ -0,0 +1,87 @@
+#include "ScrollableWidget.hpp"
+
+using namespace tp;
+
+void ScrollableBarWidget::process(const EventHandler& events) {
+	// all content is visible no need to process anything
+	if (mSizeFactor >= 1) {
+		mScrolling = false;
+		mPosFactor = mSizeFactor / 2.f;
+		freeFocus();
+		return;
+	}
+
+	updateHandleRect();
+
+	auto pointer = events.getPointer();
+	auto size = getArea().size;
+
+	mHandleHovered = getHandleRect().isInside(pointer);
+
+	if (getRelativeAreaT().isInside(pointer) && events.isPressed(InputID::MOUSE1)) {
+		if (!mHandleHovered) {
+			jumpTo((pointer / size)[mVertical]);
+			mStartPos = { 0, 0 };
+		} else {
+			mStartPos = pointer - getHandleRect().center();
+		}
+		mScrolling = true;
+		lockFocus();
+	}
+
+	if (mScrolling && events.isReleased(InputID::MOUSE1)) {
+		mScrolling = false;
+		freeFocus();
+	}
+
+	if (mScrolling) {
+		updateHandleRect();
+		auto dragDelta = (pointer - getHandleRect().center()) - mStartPos;
+		moveBy((dragDelta / size)[mVertical]);
+	}
+}
+
+void ScrollableBarWidget::jumpTo(halnf pos) {
+	mPosFactor = pos;
+	clamp();
+}
+
+void ScrollableBarWidget::moveBy(halnf delta) {
+	mPosFactor += delta;
+	clamp();
+}
+
+void ScrollableBarWidget::updateSizeFactor(halnf factor) {
+	mSizeFactor = factor;
+	clamp();
+}
+
+void ScrollableBarWidget::clamp() {
+	mSizeFactor = ::clamp(mSizeFactor, 0.f, 1.f);
+	mPosFactor = ::clamp(mPosFactor, mSizeFactor / 2, 1.f - mSizeFactor / 2);
+}
+
+void ScrollableBarWidget::draw(Canvas& canvas) {
+	updateHandleRect();
+
+	canvas.rect(getArea().relative(), mBGColor, mRounding);
+
+	auto& handleColor = mScrolling ? mHandleSlideColor : (mHandleHovered ? mHandleHoverColor : mHandleColor);
+	canvas.rect(getHandleRect(), handleColor, mRounding);
+}
+
+void ScrollableBarWidget::updateHandleRect() {
+	auto area = getArea().relative();
+
+	mHandleRect = area;
+	mHandleRect.size[mVertical] = area.size[mVertical] * mSizeFactor;
+	mHandleRect.pos[mVertical] = area.size[mVertical] * mPosFactor;
+
+	mHandleRect.pos[mVertical] -= mHandleRect.size[mVertical] / 2;
+
+	mHandleRect.shrinkFromCenter(mHandlePadding, true);
+}
+
+const RectF& ScrollableBarWidget::getHandleRect() const {
+	return mHandleRect;
+}

WidgetsNew/public/Layout.hpp

@@ -27,8 +27,8 @@ namespace tp {
 
 		virtual void updateLayout(bool vertical) {}
 
-		virtual void pickRect(bool vertical) = 0;
-		virtual void clampRect() = 0;
+		virtual void pickRect(bool vertical) {}
+		virtual void clampRect() {}
 		[[nodiscard]] virtual RectF getAvailableChildArea() const;
 
 	public:
@@ -59,7 +59,7 @@ namespace tp {
 		Widget* mWidget = nullptr;
 
 	protected:
-		Vec2<SizePolicy> mSizePolicy = { SizePolicy::Fixed, SizePolicy::Fixed };
+		Vec2<SizePolicy> mSizePolicy = { SizePolicy::Fixed, SizePolicy::Minimal };
 		Vec2F mMinSize = { 50, 50 };
 		Vec2F mMaxSize = { FLT_MAX / 2, FLT_MAX / 2 };
 	};

WidgetsNew/public/layouts/ScrollableLayout.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "Layout.hpp"
+
+namespace tp {
+	class ScrollableBarWidget;
+
+	class ScrollableLayout : public WidgetLayout {
+	public:
+		explicit ScrollableLayout(Widget* widget) :
+			WidgetLayout(widget) {}
+
+		void updateLayout(bool vertical) override;
+		[[nodiscard]] RectF getAvailableChildArea() const override;
+
+	private:
+		void updateWidgetRects(const RectF& area, Widget* content, ScrollableBarWidget* scroller) const;
+
+	private:
+		halnf mScrollerSize = 15;
+	};
+}

WidgetsNew/public/mangers/DebugManager.hpp

@@ -37,7 +37,7 @@ namespace tp {
 		RootWidget* mRootWidget = nullptr;
 
 		// debug
-		bool mDebug = true;
+		bool mDebug = false;
 		bool mDebugStopProcessing = false;
 		bool mDebugRedrawAlways = false;
 		bool mSlowMotion = false;

WidgetsNew/public/widgets/ScrollableWidget.hpp

@@ -0,0 +1,57 @@
+#pragma once
+
+#include "Widget.hpp"
+
+namespace tp {
+	// just the scrolling bar
+	class ScrollableBarWidget : public Widget {
+	public:
+		ScrollableBarWidget() = default;
+
+		[[nodiscard]] bool processesEvents() const override { return true; }
+		[[nodiscard]] bool propagateEventsToChildren() const override { return false; }
+		[[nodiscard]] bool needsNextFrame() const override { return mScrolling; }
+
+		void process(const EventHandler& events) override;
+		void draw(Canvas& canvas) override;
+
+		void updateSizeFactor(halnf factor); // holder-size divided by content-size
+
+		[[nodiscard]] bool getDirection() const { return mVertical; }
+		[[nodiscard]] halnf getPosFactor() const { return mPosFactor - mSizeFactor / 2; }
+
+	private:
+		[[nodiscard]] const RectF& getHandleRect() const;
+		void updateHandleRect();
+		void jumpTo(halnf);
+		void moveBy(halnf);
+		void clamp();
+
+	private: // state
+		bool mVertical = true;
+		bool mScrolling = false;
+		bool mHandleHovered = false;
+
+		Vec2F mStartPos = {};
+
+		halnf mPosFactor = 0.2f; // (center-of-holder - content-start) / content-size
+		halnf mSizeFactor = 0.3f;
+
+	private: // TODO : make params static
+		halnf mRounding = 5;
+		halnf mHandlePadding = 0;
+
+		RGBA mBGColor = { 0.1, 0.1, 0.1, 0.0 };
+		RGBA mHandleColor = { 0.2, 0.2, 0.2, 1 };
+		RGBA mHandleHoverColor = { 0.3, 0.3, 0.3, 1 };
+		RGBA mHandleSlideColor = { 0.5, 0.5, 0.5, 1 };
+
+	private: // cache
+		RectF mHandleRect;
+	};
+
+	class ScrollableWidget : public Widget {
+	public:
+		ScrollableWidget();
+	};
+}