// Taken from https://github.com/ocornut/imgui/issues/1496#issuecomment-655048353
private static void BeginGroupPanel(string name, Vector2 size)
{
ImGui.BeginGroup();
var cursorPos = ImGui.GetCursorScreenPos();
var itemSpacing = ImGui.GetStyle().ItemSpacing;
ImGui.PushStyleVar(ImGuiStyleVar.FramePadding, 0f);
ImGui.PushStyleVar(ImGuiStyleVar.ItemSpacing, 0f);
var frameHeight = ImGui.GetFrameHeight();
ImGui.BeginGroup();
Vector2 effectiveSize = size;
if (size.X < 0.0f)
{
effectiveSize.X = ImGui.GetContentRegionAvail().X;
}
else
{
effectiveSize.X = size.X;
}
ImGui.Dummy(new Vector2(effectiveSize.X, 0.0f));
ImGui.Dummy(new Vector2(frameHeight * 0.5f, 0.0f));
ImGui.SameLine(0.0f, 0.0f);
ImGui.BeginGroup();
ImGui.Dummy(new Vector2(frameHeight * 0.5f, 0.0f));
ImGui.SameLine(0.0f, 0.0f);
ImGui.TextUnformatted(name);
var labelMin = ImGui.GetItemRectMin();
var labelMax = ImGui.GetItemRectMax();
ImGui.SameLine(0.0f, 0.0f);
ImGui.Dummy(new Vector2(0.0f, frameHeight + itemSpacing.Y));
ImGui.BeginGroup();
ImGui.PopStyleVar(2);
}
public unsafe void Draw(string title, byte[] mem_data, int mem_size, int base_display_addr = 0)
{
if (!ImGui.BeginWindow(title))
{
ImGui.EndWindow();
return;
}
float line_height = ImGuiNative.igGetTextLineHeight();
int line_total_count = (mem_size + Rows - 1) / Rows;
ImGuiNative.igSetNextWindowContentSize(new Vector2(0.0f, line_total_count * line_height));
ImGui.BeginChild("##scrolling", new Vector2(0, -ImGuiNative.igGetFrameHeightWithSpacing()), false, 0);
ImGui.PushStyleVar(StyleVar.FramePadding, new Vector2(0, 0));
ImGui.PushStyleVar(StyleVar.ItemSpacing, new Vector2(0, 0));
int addr_digits_count = 0;
for (int n = base_display_addr + mem_size - 1; n > 0; n >>= 4)
{
addr_digits_count++;
}
float glyph_width = ImGui.GetTextSize("F").X;
float cell_width = glyph_width * 3; // "FF " we include trailing space in the width to easily catch clicks everywhere
var clipper = new ImGuiListClipper(line_total_count, line_height);
int visible_start_addr = clipper.DisplayStart * Rows;
int visible_end_addr = clipper.DisplayEnd * Rows;
bool data_next = false;
if (!AllowEdits || DataEditingAddr >= mem_size)
{
DataEditingAddr = -1;
}
int data_editing_addr_backup = DataEditingAddr;
if (DataEditingAddr != -1)
{
if (ImGui.IsKeyPressed(ImGui.GetKeyIndex(GuiKey.UpArrow)) && DataEditingAddr >= Rows)
{
DataEditingAddr -= Rows; DataEditingTakeFocus = true;
}
else if (ImGui.IsKeyPressed(ImGui.GetKeyIndex(GuiKey.DownArrow)) && DataEditingAddr < mem_size - Rows)
{
DataEditingAddr += Rows; DataEditingTakeFocus = true;
}
else if (ImGui.IsKeyPressed(ImGui.GetKeyIndex(GuiKey.LeftArrow)) && DataEditingAddr > 0)
{
DataEditingAddr -= 1; DataEditingTakeFocus = true;
}
else if (ImGui.IsKeyPressed(ImGui.GetKeyIndex(GuiKey.RightArrow)) && DataEditingAddr < mem_size - 1)
{
DataEditingAddr += 1; DataEditingTakeFocus = true;
}
}
if ((DataEditingAddr / Rows) != (data_editing_addr_backup / Rows))
{
// Track cursor movements
float scroll_offset = ((DataEditingAddr / Rows) - (data_editing_addr_backup / Rows)) * line_height;
bool scroll_desired = (scroll_offset < 0.0f && DataEditingAddr < visible_start_addr + Rows * 2) || (scroll_offset > 0.0f && DataEditingAddr > visible_end_addr - Rows * 2);
if (scroll_desired)
{
ImGuiNative.igSetScrollY(ImGuiNative.igGetScrollY() + scroll_offset);
}
}
for (int line_i = clipper.DisplayStart; line_i < clipper.DisplayEnd; line_i++) // display only visible items
{
int addr = line_i * Rows;
ImGui.Text(FixedHex(base_display_addr + addr, addr_digits_count) + ": ");
ImGui.SameLine();
// Draw Hexadecimal
float line_start_x = ImGuiNative.igGetCursorPosX();
for (int n = 0; n < Rows && addr < mem_size; n++, addr++)
{
ImGui.SameLine(line_start_x + cell_width * n);
if (DataEditingAddr == addr)
{
// Display text input on current byte
ImGui.PushID(addr);
// FIXME: We should have a way to retrieve the text edit cursor position more easily in the API, this is rather tedious.
TextEditCallback callback = (data) =>
{
int *p_cursor_pos = (int *)data->UserData;
if (!data->HasSelection())
{
*p_cursor_pos = data->CursorPos;
}
return(0);
};
int cursor_pos = -1;
bool data_write = false;
if (DataEditingTakeFocus)
{
ImGui.SetKeyboardFocusHere();
ReplaceChars(DataInput, FixedHex(mem_data[addr], 2));
ReplaceChars(AddrInput, FixedHex(base_display_addr + addr, addr_digits_count));
}
ImGui.PushItemWidth(ImGui.GetTextSize("FF").X);
var flags = InputTextFlags.CharsHexadecimal | InputTextFlags.EnterReturnsTrue | InputTextFlags.AutoSelectAll | InputTextFlags.NoHorizontalScroll | InputTextFlags.AlwaysInsertMode | InputTextFlags.CallbackAlways;
if (ImGui.InputText("##data", DataInput, 32, flags, callback, new IntPtr(&cursor_pos)))
{
data_write = data_next = true;
}
else if (!DataEditingTakeFocus && !ImGui.IsLastItemActive())
{
DataEditingAddr = -1;
}
DataEditingTakeFocus = false;
ImGui.PopItemWidth();
if (cursor_pos >= 2)
{
data_write = data_next = true;
}
if (data_write)
{
int data;
if (TryHexParse(DataInput, out data))
{
mem_data[addr] = (byte)data;
}
}
ImGui.PopID();
}
else
{
ImGui.Text(FixedHex(mem_data[addr], 2));
if (AllowEdits && ImGui.IsItemHovered(HoveredFlags.Default) && ImGui.IsMouseClicked(0))
{
DataEditingTakeFocus = true;
DataEditingAddr = addr;
}
}
}
ImGui.SameLine(line_start_x + cell_width * Rows + glyph_width * 2);
//separator line drawing replaced by printing a pipe char
// Draw ASCII values
addr = line_i * Rows;
var asciiVal = new System.Text.StringBuilder(2 + Rows);
asciiVal.Append("| ");
for (int n = 0; n < Rows && addr < mem_size; n++, addr++)
{
int c = mem_data[addr];
asciiVal.Append((c >= 32 && c < 128) ? Convert.ToChar(c) : '.');
}
ImGui.TextUnformatted(asciiVal.ToString()); //use unformatted, so string can contain the '%' character
}
//clipper.End(); //not implemented
ImGui.PopStyleVar(2);
ImGui.EndChild();
if (data_next && DataEditingAddr < mem_size)
{
DataEditingAddr = DataEditingAddr + 1;
DataEditingTakeFocus = true;
}
ImGui.Separator();
ImGuiNative.igAlignTextToFramePadding();
ImGui.PushItemWidth(50);
ImGuiNative.igPushAllowKeyboardFocus(false);
int rows_backup = Rows;
if (ImGui.DragInt("##rows", ref Rows, 0.2f, 4, 32, "%.0f rows"))
{
if (Rows <= 0)
{
Rows = 4;
}
Vector2 new_window_size = ImGui.GetWindowSize();
new_window_size.X += (Rows - rows_backup) * (cell_width + glyph_width);
ImGui.SetWindowSize(new_window_size);
}
ImGuiNative.igPopAllowKeyboardFocus();
ImGui.PopItemWidth();
ImGui.SameLine();
ImGui.Text(string.Format(" Range {0}..{1} ", FixedHex(base_display_addr, addr_digits_count),
FixedHex(base_display_addr + mem_size - 1, addr_digits_count)));
ImGui.SameLine();
ImGui.PushItemWidth(70);
if (ImGui.InputText("##addr", AddrInput, 32, InputTextFlags.CharsHexadecimal | InputTextFlags.EnterReturnsTrue, null))
{
int goto_addr;
if (TryHexParse(AddrInput, out goto_addr))
{
goto_addr -= base_display_addr;
if (goto_addr >= 0 && goto_addr < mem_size)
{
ImGui.BeginChild("##scrolling");
ImGuiNative.igSetScrollFromPosY(ImGui.GetCursorStartPos().Y + (goto_addr / Rows) * ImGuiNative.igGetTextLineHeight());
ImGui.EndChild();
DataEditingAddr = goto_addr;
DataEditingTakeFocus = true;
}
}
}
ImGui.PopItemWidth();
ImGui.EndWindow();
}