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Tidying up Begin()

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This commit is contained in:
ocornut 2015-05-02 10:46:24 +01:00
parent 3f7f256752
commit 46f55fe6f6
1 changed files with 8 additions and 13 deletions
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21
imgui.cpp
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@ -3148,16 +3148,17 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size_on_first_
// When reusing window again multiple times a frame, just append content (don't need to setup again)
const int current_frame = ImGui::GetFrameCount();
const bool first_begin_of_the_frame = (window->LastFrameDrawn != current_frame);
const bool window_was_visible = (window->LastFrameDrawn == current_frame - 1);
if (first_begin_of_the_frame)
{
window->Visible = true;
window->DrawList->Clear();
window->ClipRectStack.resize(0);
window->LastFrameDrawn = current_frame;
}
// Setup texture
// Setup texture, outer clipping rectangle
window->DrawList->PushTextureID(g.Font->ContainerAtlas->TexID);
// Setup outer clipping rectangle
if ((flags & ImGuiWindowFlags_ChildWindow) && !(flags & ImGuiWindowFlags_ComboBox))
PushClipRect(parent_window->ClipRectStack.back());
else
@ -3165,30 +3166,25 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size_on_first_
if (first_begin_of_the_frame)
{
window->Visible = true;
// New windows appears in front
if (!(flags & ImGuiWindowFlags_ChildWindow) && !(flags & ImGuiWindowFlags_Tooltip))
if (!window_was_visible)
{
if (window->LastFrameDrawn < current_frame - 1)
if (!(flags & ImGuiWindowFlags_ChildWindow) && !(flags & ImGuiWindowFlags_Tooltip))
{
FocusWindow(window);
// Popup position themselves when they first appear
if (flags & ImGuiWindowFlags_Popup)
{
if (!window_pos_set_by_api)
window->PosFloat = g.IO.MousePos;
}
}
}
window->LastFrameDrawn = current_frame;
// Reset contents size for auto-fitting
window->SizeContents = window_is_new ? ImVec2(0.0f, 0.0f) : window->DC.CursorMaxPos - window->Pos;
window->SizeContents.y += window->ScrollY;
// Child position follows drawing cursor
if (flags & ImGuiWindowFlags_ChildWindow)
{
parent_window->DC.ChildWindows.push_back(window);
@ -3259,8 +3255,6 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size_on_first_
window->FocusIdxAllCounter = window->FocusIdxTabCounter = -1;
window->FocusIdxAllRequestNext = window->FocusIdxTabRequestNext = IM_INT_MAX;
ImRect title_bar_rect = window->TitleBarRect();
// Apply scrolling
window->ScrollY = window->NextScrollY;
window->ScrollY = ImMax(window->ScrollY, 0.0f);
@ -3270,6 +3264,7 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size_on_first_
// At this point we don't have a clipping rectangle setup yet, so we can test and draw in title bar
// Collapse window by double-clicking on title bar
ImRect title_bar_rect = window->TitleBarRect();
if (!(window->Flags & ImGuiWindowFlags_NoTitleBar))
{
if (!(window->Flags & ImGuiWindowFlags_NoCollapse) && g.HoveredWindow == window && IsMouseHoveringRect(title_bar_rect) && g.IO.MouseDoubleClicked[0])