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Internals: ItemAdd: set LastItemXXX fields before navigation calls + comments about io.IniFilename (#4294)

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This commit is contained in:
ocornut 2021-07-19 19:10:14 +02:00
parent 17ec4f1f6f
commit 1ad153056a
3 changed files with 16 additions and 11 deletions
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23
imgui.cpp
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@ -1070,7 +1070,7 @@ ImGuiIO::ImGuiIO()
DisplaySize = ImVec2(-1.0f, -1.0f);
DeltaTime = 1.0f / 60.0f;
IniSavingRate = 5.0f;
IniFilename = "imgui.ini";
IniFilename = "imgui.ini"; // Important: "imgui.ini" is relative to current working dir, most apps will want to lock this to an absolute path (e.g. same path as executables).
LogFilename = "imgui_log.txt";
MouseDoubleClickTime = 0.30f;
MouseDoubleClickMaxDist = 6.0f;
@ -3278,6 +3278,7 @@ void ImGui::SetLastItemData(ImGuiWindow* window, ImGuiID item_id, ImGuiItemFlags
window->DC.LastItemRect = item_rect;
}
// Called by ItemAdd()
// Process TAB/Shift+TAB. Be mindful that this function may _clear_ the ActiveID when tabbing out.
void ImGui::ItemFocusable(ImGuiWindow* window, ImGuiID id)
{
@ -7455,9 +7456,17 @@ bool ImGui::ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb_arg, ImGu
ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
// Equivalent to calling SetLastItemData()
window->DC.LastItemId = id;
window->DC.LastItemRect = bb;
window->DC.LastItemInFlags = g.CurrentItemFlags;
window->DC.LastItemStatusFlags = ImGuiItemStatusFlags_None;
g.NextItemData.Flags = ImGuiNextItemDataFlags_None;
// Directional navigation processing
if (id != 0)
{
// Navigation processing runs prior to clipping early-out
// Runs prior to clipping early-out
// (a) So that NavInitRequest can be honored, for newly opened windows to select a default widget
// (b) So that we can scroll up/down past clipped items. This adds a small O(N) cost to regular navigation requests
// unfortunately, but it is still limited to one window. It may not scale very well for windows with ten of
@ -7482,13 +7491,6 @@ bool ImGui::ItemAdd(const ImRect& bb, ImGuiID id, const ImRect* nav_bb_arg, ImGu
#endif
}
// Equivalent to calling SetLastItemData()
window->DC.LastItemId = id;
window->DC.LastItemRect = bb;
window->DC.LastItemInFlags = g.CurrentItemFlags;
window->DC.LastItemStatusFlags = ImGuiItemStatusFlags_None;
g.NextItemData.Flags = ImGuiNextItemDataFlags_None;
#ifdef IMGUI_ENABLE_TEST_ENGINE
if (id != 0)
IMGUI_TEST_ENGINE_ITEM_ADD(nav_bb_arg ? *nav_bb_arg : bb, id);
@ -8856,7 +8858,7 @@ static void ImGui::NavProcessItem(ImGuiWindow* window, const ImRect& nav_bb, con
//if (!g.IO.NavActive) // [2017/10/06] Removed this possibly redundant test but I am not sure of all the side-effects yet. Some of the feature here will need to work regardless of using a _NoNavInputs flag.
// return;
const ImGuiItemFlags item_flags = g.CurrentItemFlags;
const ImGuiItemFlags item_flags = window->DC.LastItemInFlags;
const ImRect nav_bb_rel(nav_bb.Min - window->Pos, nav_bb.Max - window->Pos);
// Process Init Request
@ -9885,6 +9887,7 @@ bool ImGui::BeginDragDropSource(ImGuiDragDropFlags flags)
// We build a throwaway ID based on current ID stack + relative AABB of items in window.
// THE IDENTIFIER WON'T SURVIVE ANY REPOSITIONING OF THE WIDGET, so if your widget moves your dragging operation will be canceled.
// We don't need to maintain/call ClearActiveID() as releasing the button will early out this function and trigger !ActiveIdIsAlive.
// Rely on keeping other window->LastItemXXX fields intact.
source_id = window->DC.LastItemId = window->GetIDFromRectangle(window->DC.LastItemRect);
bool is_hovered = ItemHoverable(window->DC.LastItemRect, source_id);
if (is_hovered && g.IO.MouseClicked[mouse_button])

3
imgui.h
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@ -898,6 +898,7 @@ namespace ImGui
// Settings/.Ini Utilities
// - The disk functions are automatically called if io.IniFilename != NULL (default is "imgui.ini").
// - Set io.IniFilename to NULL to load/save manually. Read io.WantSaveIniSettings description about handling .ini saving manually.
// - Important: default value "imgui.ini" is relative to current working dir! Most apps will want to lock this to an absolute path (e.g. same path as executables).
IMGUI_API void LoadIniSettingsFromDisk(const char* ini_filename); // call after CreateContext() and before the first call to NewFrame(). NewFrame() automatically calls LoadIniSettingsFromDisk(io.IniFilename).
IMGUI_API void LoadIniSettingsFromMemory(const char* ini_data, size_t ini_size=0); // call after CreateContext() and before the first call to NewFrame() to provide .ini data from your own data source.
IMGUI_API void SaveIniSettingsToDisk(const char* ini_filename); // this is automatically called (if io.IniFilename is not empty) a few seconds after any modification that should be reflected in the .ini file (and also by DestroyContext).
@ -1800,7 +1801,7 @@ struct ImGuiIO
ImVec2 DisplaySize; // <unset> // Main display size, in pixels (generally == GetMainViewport()->Size)
float DeltaTime; // = 1.0f/60.0f // Time elapsed since last frame, in seconds.
float IniSavingRate; // = 5.0f // Minimum time between saving positions/sizes to .ini file, in seconds.
const char* IniFilename; // = "imgui.ini" // Path to .ini file. Set NULL to disable automatic .ini loading/saving, if e.g. you want to manually load/save from memory.
const char* IniFilename; // = "imgui.ini" // Path to .ini file (important: default "imgui.ini" is relative to current working dir!). Set NULL to disable automatic .ini loading/saving or if you want to manually call LoadIniSettingsXXX() / SaveIniSettingsXXX() functions.
const char* LogFilename; // = "imgui_log.txt"// Path to .log file (default parameter to ImGui::LogToFile when no file is specified).
float MouseDoubleClickTime; // = 0.30f // Time for a double-click, in seconds.
float MouseDoubleClickMaxDist; // = 6.0f // Distance threshold to stay in to validate a double-click, in pixels.

1
imgui_widgets.cpp
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@ -682,6 +682,7 @@ bool ImGui::ButtonEx(const char* label, const ImVec2& size_arg, ImGuiButtonFlags
if (g.CurrentItemFlags & ImGuiItemFlags_ButtonRepeat)
flags |= ImGuiButtonFlags_Repeat;
bool hovered, held;
bool pressed = ButtonBehavior(bb, id, &hovered, &held, flags);