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-rw-r--r--qtmips_gui/memoryview.cpp246
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diff --git a/qtmips_gui/memoryview.cpp b/qtmips_gui/memoryview.cpp
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-// SPDX-License-Identifier: GPL-2.0+
-/*******************************************************************************
- * QtMips - MIPS 32-bit Architecture Subset Simulator
- *
- * Implemented to support following courses:
- *
- * B35APO - Computer Architectures
- * https://cw.fel.cvut.cz/wiki/courses/b35apo
- *
- * B4M35PAP - Advanced Computer Architectures
- * https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
- *
- * Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
- * Copyright (c) 2019 Pavel Pisa <pisa@cmp.felk.cvut.cz>
- *
- * Faculty of Electrical Engineering (http://www.fel.cvut.cz)
- * Czech Technical University (http://www.cvut.cz/)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- ******************************************************************************/
-
-#include "memoryview.h"
-
-///////////////////////////
-// Minimal reserved range in pixels of scroll area (otherwise 10% of height are used)
-#define MIN_OFF 10
-// Focus point (this is multiplied with height of widget to know position where we want to focus)
-#define FOCUS 0.25
-// How angle maps to pixels when and scroll is used
-#define ANGLE_SCROLL 1
-///////////////////////////
-
-MemoryView::MemoryView(QWidget *parent, std::uint32_t addr0) : QWidget(parent) {
- memory = nullptr;
- addr_0 = addr0;
- change_counter = 0;
- cache_data_change_counter = 0;
-
- layout = new QVBoxLayout(this);
-
- memf= new Frame(this);
- layout->addWidget(memf);
-
-
- ctl_widg = new QWidget(this);
- layout->addWidget(ctl_widg);
-
- go_edit = new QLineEdit(ctl_widg);
- go_edit->setText("0x00000000");
- go_edit->setInputMask("\\0\\xHHHHHHHH");
- layout->addWidget(go_edit);
- connect(go_edit, SIGNAL(editingFinished()), this, SLOT(go_edit_finish()));
-}
-
-void MemoryView::setup(machine::QtMipsMachine *machine) {
- memory = (machine == nullptr) ? nullptr : machine->memory();
- cache_data = (machine == nullptr) ? nullptr : machine->cache_data();
- if (machine != nullptr)
- connect(machine, SIGNAL(post_tick()), this, SLOT(check_for_updates()));
- reload_content();
-}
-
-void MemoryView::set_focus(std::uint32_t address) {
- if (address < addr_0 || (address - addr_0)/4 > (unsigned)memf->widg->count()) {
- // This is outside of loaded area so just move it and reload everything
- addr_0 = address - 4*memf->focussed();
- addr0_save_change(addr_0);
- reload_content();
- } else {
- memf->focus((address - addr_0) / 4);
- }
- edit_load_focus();
-}
-
-std::uint32_t MemoryView::focus() const {
- return addr_0 + 4*memf->focussed();
-}
-
-std::uint32_t MemoryView::addr0() const {
- return addr_0;
-}
-
-void MemoryView::edit_load_focus() {
- go_edit->setText(QString("0x%1").arg(focus(), 8, 16, QChar('0')));
-}
-
-void MemoryView::check_for_updates() {
- bool need_update = false;
- if (memory != nullptr) {
- if (change_counter != memory->get_change_counter())
- need_update = true;
- }
- if (cache_data != nullptr) {
- if (cache_data_change_counter != cache_data->get_change_counter())
- need_update = true;
- }
- if (need_update)
- reload_content();
-}
-
-void MemoryView::reload_content() {
- int count = memf->widg->count();
- memf->widg->clearRows();
- if (memory != nullptr)
- change_counter = memory->get_change_counter();
- if (cache_data != nullptr)
- cache_data_change_counter = cache_data->get_change_counter();
- update_content(count, 0);
-}
-
-void MemoryView::update_content(int count, int shift) {
- if (abs(shift) >= memf->widg->count()) {
- // This shifts more than we have so just reload whole content
- memf->widg->clearRows();
- addr_0 += 4*shift;
- for (int i = 0; i <= count; i++)
- memf->widg->addRow(row_widget(addr_0 + 4*i, memf->widg));
- return;
- }
-
- int diff = count - memf->widg->count();
- int d_b = shift;
- int d_e = diff - shift;
-
- if (d_b > 0)
- for (int i = 0; i < d_b; i++) {
- addr_0 -= 4;
- memf->widg->insertRow(row_widget(addr_0, memf->widg), 0);
- }
- else
- for (int i = 0; i > d_b; i--) {
- addr_0 += 4;
- memf->widg->removeRow(0);
- }
- if (d_e > 0)
- for (int i = 0; i < d_e; i++)
- memf->widg->addRow(row_widget(addr_0 + 4*memf->widg->count(), memf->widg));
- else
- for (int i = 0; i > d_e; i--)
- memf->widg->removeRow(memf->widg->count() - 1);
- addr0_save_change(addr_0);
-}
-
-void MemoryView::addr0_save_change(std::uint32_t val) { /* ignore */ }
-
-void MemoryView::go_edit_finish() {
- QString hex = go_edit->text();
- hex.remove(0, 2);
-
- bool ok;
- std::uint32_t nw = hex.toUInt(&ok, 16);
- if (ok) {
- set_focus(nw);
- } else
- edit_load_focus();
-}
-
-MemoryView::Frame::Frame(MemoryView *parent) : QAbstractScrollArea(parent) {
- mv = parent;
- content_y = -3*MIN_OFF/2; // When this is initialized the width is 0 so this uses just min to inialize it
-
- widg = new StaticTable(this);
- setViewport(widg);
-
- setFrameShape(QFrame::NoFrame);
- setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
- setContentsMargins(0, 0, 0, 0);
-}
-
-void MemoryView::Frame::focus(unsigned i) {
- content_y = (FOCUS*height()) - widg->row_size()*i/widg->columns() - widg->row_size()/2;
- viewport()->move(0, content_y);
- viewport()->repaint(0, content_y, width(), height());
- check_update();
-}
-
-// Calculate which row is in focus at the moment
-unsigned MemoryView::Frame::focussed() {
- int h = (FOCUS*height() - content_y) / widg->row_size() * widg->columns();
- return qMax(h, 0);
-}
-
-// This verifies that we are not scrolled too far away down or up and that we have enought height
-// We make 10% of height as buffer zone with fixed minimum in pixels
-void MemoryView::Frame::check_update() {
- int hpart = qMax(height()/10, MIN_OFF);
- int req_height = height() + 2*hpart;
-
- if ((content_y < -hpart) && (content_y > -2*hpart) && (widg->height() >= req_height))
- return;
-
- int row_h = widg->row_size();
- // Calculate how many we need and how much we need to move and update content accordingly
- int count = (req_height / row_h) + 1;
- int shift = (content_y + hpart + hpart/2)/row_h;
- mv->update_content(count * widg->columns(), shift * widg->columns());
- // Move and resize widget
- content_y -= shift * row_h;
- widg->setGeometry(0, content_y, width(), count * row_h);
-
- mv->edit_load_focus();
-}
-
-void MemoryView::Frame::resizeEvent(QResizeEvent *e) {
- QAbstractScrollArea::resizeEvent(e);
- widg->setGeometry(0, content_y, e->size().width(), widg->heightForWidth(e->size().width()));
- check_update();
-}
-
-void MemoryView::Frame::wheelEvent(QWheelEvent *e) {
- QPoint pix = e->pixelDelta();
- QPoint ang = e->angleDelta();
-
- if (!pix.isNull())
- content_y += pix.ry();
- else if (!ang.isNull())
- content_y += ang.ry() * ANGLE_SCROLL;
-
- // TODO smooth scroll
- viewport()->move(0, content_y);
- viewport()->repaint(0, content_y, width(), height());
-
- check_update();
-}
-
-bool MemoryView::Frame::viewportEvent(QEvent *e) {
- bool p = QAbstractScrollArea::viewportEvent(e);
- // Pass paint event to viewport widget
- if (e->type() == QEvent::Paint)
- p = false;
- return p;
-}
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