Fix zoom in fpgawidget
This commit is contained in:
Sergiusz Bazanski
parent
8a226626be
commit
284b4750ee
@ -241,7 +241,7 @@ void LineShader::draw(const LineShaderData &line, const QMatrix4x4 &projection)
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}
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FPGAViewWidget::FPGAViewWidget(QWidget *parent)
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: QOpenGLWidget(parent), moveX_(0), moveY_(0), zoom_(10.0f), lineShader_(this), ctx_(nullptr)
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: QOpenGLWidget(parent), lineShader_(this), zoom_(500.f), ctx_(nullptr)
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{
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auto fmt = format();
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fmt.setMajorVersion(3);
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@ -271,38 +271,6 @@ QSize FPGAViewWidget::minimumSizeHint() const { return QSize(640, 480); }
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QSize FPGAViewWidget::sizeHint() const { return QSize(640, 480); }
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void FPGAViewWidget::setXTranslation(float t_x)
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{
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if (t_x == moveX_)
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return;
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moveX_ = t_x;
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update();
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}
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void FPGAViewWidget::setYTranslation(float t_y)
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{
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if (t_y == moveY_)
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return;
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moveY_ = t_y;
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update();
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}
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void FPGAViewWidget::setZoom(float t_z)
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{
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if (t_z == zoom_)
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return;
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zoom_ = t_z;
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if (zoom_ < 1.0f)
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zoom_ = 1.0f;
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if (zoom_ > 500.f)
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zoom_ = 500.0f;
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update();
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}
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void FPGAViewWidget::initializeGL()
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{
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if (!lineShader_.compile()) {
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@ -331,6 +299,16 @@ void FPGAViewWidget::drawElement(LineShaderData &out, const GraphicElement &el)
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}
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}
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QMatrix4x4 FPGAViewWidget::getProjection(void)
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{
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QMatrix4x4 matrix;
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const float aspect = float(width()) / float(height());
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matrix.perspective(3.14/2, aspect, zoomNear_, zoomFar_);
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matrix.translate(0.0f, 0.0f, -zoom_);
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return matrix;
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}
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void FPGAViewWidget::paintGL()
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{
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auto gl = QOpenGLContext::currentContext()->functions();
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@ -338,15 +316,16 @@ void FPGAViewWidget::paintGL()
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gl->glViewport(0, 0, width() * retinaScale, height() * retinaScale);
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gl->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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const float aspect = float(width()) / float(height());
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QMatrix4x4 matrix = getProjection();
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QMatrix4x4 matrix;
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matrix.ortho(QRectF(-aspect / 2.0, -0.5, aspect, 1.0f));
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matrix.scale(zoom_ * 0.01f, -zoom_ * 0.01f, 0);
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matrix.translate(moveX_, -moveY_, 0);
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matrix *= viewMove_;
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// Calculate world thickness to achieve a screen 1px/1.1px line.
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float thick1Px = mouseToWorldCoordinates(1, 0).x();
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float thick11Px = mouseToWorldCoordinates(1.1, 0).x();
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// Draw grid.
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auto grid = LineShaderData(0.001f, QColor("#DDD"));
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auto grid = LineShaderData(thick1Px, QColor("#DDD"));
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for (float i = -100.0f; i < 100.0f; i += 1.0f) {
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PolyLine(-100.0f, i, 100.0f, i).build(grid);
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PolyLine(i, -100.0f, i, 100.0f).build(grid);
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@ -354,7 +333,7 @@ void FPGAViewWidget::paintGL()
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lineShader_.draw(grid, matrix);
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// Draw Bels.
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auto bels = LineShaderData(0.0005f, QColor("#b000ba"));
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auto bels = LineShaderData(thick11Px, QColor("#b000ba"));
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if (ctx_) {
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for (auto bel : ctx_->getBels()) {
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for (auto &el : ctx_->getBelGraphics(bel))
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@ -364,7 +343,7 @@ void FPGAViewWidget::paintGL()
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}
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// Draw Wires.
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auto wires = LineShaderData(0.0005f, QColor("#b000ba"));
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auto wires = LineShaderData(thick11Px, QColor("#b000ba"));
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if (ctx_) {
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for (auto wire : ctx_->getWires()) {
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for (auto &el : ctx_->getWireGraphics(wire))
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@ -374,7 +353,7 @@ void FPGAViewWidget::paintGL()
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}
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// Draw Pips.
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auto pips = LineShaderData(0.0005f, QColor("#b000ba"));
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auto pips = LineShaderData(thick11Px, QColor("#b000ba"));
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if (ctx_) {
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for (auto wire : ctx_->getPips()) {
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for (auto &el : ctx_->getPipGraphics(wire))
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@ -384,7 +363,7 @@ void FPGAViewWidget::paintGL()
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}
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// Draw Groups.
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auto groups = LineShaderData(0.0005f, QColor("#b000ba"));
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auto groups = LineShaderData(thick11Px, QColor("#b000ba"));
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if (ctx_) {
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for (auto group : ctx_->getGroups()) {
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for (auto &el : ctx_->getGroupGraphics(group))
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@ -394,7 +373,7 @@ void FPGAViewWidget::paintGL()
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}
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// Draw Frame Graphics.
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auto frames = LineShaderData(0.002f, QColor("#0066ba"));
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auto frames = LineShaderData(thick11Px, QColor("#0066ba"));
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if (ctx_) {
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for (auto &el : ctx_->getFrameGraphics()) {
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drawElement(frames, el);
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@ -407,26 +386,31 @@ void FPGAViewWidget::resizeGL(int width, int height) {}
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void FPGAViewWidget::mousePressEvent(QMouseEvent *event)
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{
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startDragX_ = moveX_;
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startDragY_ = moveY_;
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lastPos_ = event->pos();
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}
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// Invert the projection matrix to calculate screen/mouse to world/grid
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// coordinates.
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QVector4D FPGAViewWidget::mouseToWorldCoordinates(int x, int y)
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{
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QMatrix4x4 p = getProjection();
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QVector2D unit = p.map(QVector4D(1, 1, 0, 1)).toVector2DAffine();
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float sx = (((float)x) / (width()/2));
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float sy = (((float)y) / (height()/2));
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return QVector4D(sx / unit.x(), sy / unit.y(), 0, 1);
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}
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void FPGAViewWidget::mouseMoveEvent(QMouseEvent *event)
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{
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const int dx = event->x() - lastPos_.x();
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const int dy = event->y() - lastPos_.y();
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lastPos_ = event->pos();
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const qreal retinaScale = devicePixelRatio();
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float aspect = float(width()) / float(height());
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const float dx_scale = dx * (1 / (float)width() * retinaScale * aspect);
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const float dy_scale = dy * (1 / (float)height() * retinaScale);
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auto world = mouseToWorldCoordinates(dx, dy);
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viewMove_.translate(world.x(), -world.y());
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float xpos = dx_scale + startDragX_;
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float ypos = dy_scale + startDragY_;
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setXTranslation(xpos);
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setYTranslation(ypos);
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update();
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}
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void FPGAViewWidget::wheelEvent(QWheelEvent *event)
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@ -434,8 +418,19 @@ void FPGAViewWidget::wheelEvent(QWheelEvent *event)
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QPoint degree = event->angleDelta() / 8;
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if (!degree.isNull()) {
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float steps = degree.y() / 3.0;
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setZoom(zoom_ + steps);
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if (zoom_ < zoomNear_) {
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zoom_ = zoomNear_;
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} else if (zoom_ < zoomLvl1_) {
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zoom_ -= degree.y() / 10.0;
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} else if (zoom_ < zoomLvl2_) {
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zoom_ -= degree.y() / 5.0;
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} else if (zoom_ < zoomFar_) {
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zoom_ -= degree.y();
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} else {
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zoom_ = zoomFar_;
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}
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update();
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}
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}
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@ -245,13 +245,18 @@ class FPGAViewWidget : public QOpenGLWidget, protected QOpenGLFunctions
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private:
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QPoint lastPos_;
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float moveX_;
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float moveY_;
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float zoom_;
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LineShader lineShader_;
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QMatrix4x4 viewMove_;
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float zoom_;
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QMatrix4x4 getProjection(void);
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QVector4D mouseToWorldCoordinates(int x, int y);
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const float zoomNear_ = 1.0f; // do not zoom closer than this
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const float zoomFar_ = 10000.0f; // do not zoom further than this
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const float zoomLvl1_ = 100.0f;
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const float zoomLvl2_ = 50.0f;
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float startDragX_;
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float startDragY_;
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Context *ctx_;
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};
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