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Resizing window doesn't rely on MouseDelta anymore, but rather recompute expected size based absolute mouse coords. (#668) 

Storing ActiveIdClickOffset to generalize pattern already used by
columns.
This commit is contained in:
ocornut 2016-05-21 20:50:15 +02:00
parent 81bf5aeb09
commit 102d03a7eb
3 changed files with 9 additions and 9 deletions
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10
imgui.cpp
View File

@ -3993,7 +3993,7 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
if ((flags & ImGuiWindowFlags_ChildWindow) && !(flags & ImGuiWindowFlags_Popup))
{
window->Pos = window->PosFloat = parent_window->DC.CursorPos;
window->Size = window->SizeFull = size_on_first_use; // NB: argument name 'size_on_first_use' misleading here, it's really just 'size' as provided by user.
window->Size = window->SizeFull = size_on_first_use; // NB: argument name 'size_on_first_use' misleading here, it's really just 'size' as provided by user passed via BeginChild()->Begin().
}
bool window_pos_center = false;
@ -4108,7 +4108,8 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
}
else if (held)
{
window->SizeFull = ImMax(window->SizeFull + g.IO.MouseDelta, style.WindowMinSize);
// We don't use an incremental MouseDelta but rather compute an absolute target size based on mouse position
window->SizeFull = ImMax((g.IO.MousePos - g.ActiveIdClickOffset + resize_rect.GetSize()) - window->Pos, style.WindowMinSize);
if (!(flags & ImGuiWindowFlags_NoSavedSettings))
MarkSettingsDirty();
}
@ -5423,6 +5424,7 @@ bool ImGui::ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool
{
SetActiveID(id, window); // Hold on ID
FocusWindow(window);
g.ActiveIdClickOffset = g.IO.MousePos - bb.Min;
}
if (((flags & ImGuiButtonFlags_PressedOnClick) && g.IO.MouseClicked[0]) || ((flags & ImGuiButtonFlags_PressedOnDoubleClick) && g.IO.MouseDoubleClicked[0]))
{
@ -9188,7 +9190,7 @@ static float GetDraggedColumnOffset(int column_index)
IM_ASSERT(column_index > 0); // We cannot drag column 0. If you get this assert you may have a conflict between the ID of your columns and another widgets.
IM_ASSERT(g.ActiveId == window->DC.ColumnsSetID + ImGuiID(column_index));
float x = g.IO.MousePos.x + g.ActiveClickDeltaToCenter.x - window->Pos.x;
float x = g.IO.MousePos.x - g.ActiveIdClickOffset.x - window->Pos.x;
x = ImClamp(x, ImGui::GetColumnOffset(column_index-1)+g.Style.ColumnsMinSpacing, ImGui::GetColumnOffset(column_index+1)-g.Style.ColumnsMinSpacing);
return (float)(int)x;
@ -9293,7 +9295,7 @@ void ImGui::Columns(int columns_count, const char* id, bool border)
if (held)
{
if (g.ActiveIdIsJustActivated)
g.ActiveClickDeltaToCenter.x = x - g.IO.MousePos.x;
g.ActiveIdClickOffset.x -= 4; // Store from center of column line
x = GetDraggedColumnOffset(i);
SetColumnOffset(i, x);
}

4
imgui_demo.cpp
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@ -1807,10 +1807,8 @@ static void ShowExampleAppFixedOverlay(bool* p_open)
ImGui::End();
}
static void ShowExampleAppManipulatingWindowTitle(bool* p_open)
static void ShowExampleAppManipulatingWindowTitle(bool*)
{
(void)p_open;
// By default, Windows are uniquely identified by their title.
// You can use the "##" and "###" markers to manipulate the display/ID. Read FAQ at the top of this file!

4
imgui_internal.h
View File

@ -373,6 +373,7 @@ struct ImGuiContext
bool ActiveIdIsAlive;
bool ActiveIdIsJustActivated; // Set at the time of activation for one frame
bool ActiveIdAllowOverlap; // Set only by active widget
ImVec2 ActiveIdClickOffset; // Clicked offset from upper-left corner, if applicable (currently only set by ButtonBehavior)
ImGuiWindow* ActiveIdWindow;
ImGuiWindow* MovedWindow; // Track the child window we clicked on to move a window.
ImGuiID MovedWindowMoveId; // == MovedWindow->RootWindow->MoveId
@ -410,7 +411,6 @@ struct ImGuiContext
ImFont InputTextPasswordFont;
ImGuiID ScalarAsInputTextId; // Temporary text input when CTRL+clicking on a slider, etc.
ImGuiStorage ColorEditModeStorage; // Store user selection of color edit mode
ImVec2 ActiveClickDeltaToCenter;
float DragCurrentValue; // Currently dragged value, always float, not rounded by end-user precision settings
ImVec2 DragLastMouseDelta;
float DragSpeedDefaultRatio; // If speed == 0.0f, uses (max-min) * DragSpeedDefaultRatio
@ -458,6 +458,7 @@ struct ImGuiContext
ActiveIdIsAlive = false;
ActiveIdIsJustActivated = false;
ActiveIdAllowOverlap = false;
ActiveIdClickOffset = ImVec2(-1,-1);
ActiveIdWindow = NULL;
MovedWindow = NULL;
MovedWindowMoveId = 0;
@ -475,7 +476,6 @@ struct ImGuiContext
SetNextTreeNodeOpenCond = 0;
ScalarAsInputTextId = 0;
ActiveClickDeltaToCenter = ImVec2(0.0f, 0.0f);
DragCurrentValue = 0.0f;
DragLastMouseDelta = ImVec2(0.0f, 0.0f);
DragSpeedDefaultRatio = 0.01f;