Examples: Formatting #187

Merge pull request #187 from heroboy/patch-1 ...

Examples: DirectX9: Set shaders to NULL to enforce using fixed pipeline.

set pixel shader and vertex shader to NULL ...

Previous graphic render may use shaders,so set pixel shader and vertex shader to NULL to force use fixed pipeline.

Examples: Fixed ShowExampleAppManipulatingWindowTitle() not doing the right thing, broken in ff35d24

Update README.txt

Update README.txt

Clicking on void loses keyboard-focus so application can use TAB back

Allow SetWindowFocus(NULL) to remove focus

Examples: OpenGL fixed-pipeline: added glBindTexture(0), via Anton M

Comments

DragFloat() comment examples, not ready for prime-time #180

DragFloat() examples #180

DragFloat() double-clicking turns into an input box (along with Ctrl+clicking) #180

DragFloat(): passing min>=max (e.g. 0.0f) for range makes the drag unbound #180, removed extra APIs

SliderFloat() removed support for unbound/infinite slider, inconsistent. Use InputFloat()/DragFloat()

Selectable() render into AutoFitPadding but do not extend it, fixing small visual gap ...

Followup 2e26196 /  #1

Combo() adding frame padding inside the combo box.

InputInt2(), InputInt3(), InputInt4(): fixed label vertical alignment

ShowTestWindow() renamed sliders examples to say "slider"

Added DragFloat(), DragInt() work in progress #180

Examples: initializing float + missing comment.

ColorEdit4(): tweak code to be a little less ugly (still not a beauty contest winner..)

ColorEdit4(): hide components prefix if there's no space for them.

Comments and organization of imgui.h

Slider: don't call RenderText() on empty label.

Slider: fix in the unlikely case that style.GrabMinSize is larger than a slider.

Internal renaming

Delete font clear pointer in ImGui state to get a clear crasah instead of a dangling pointer. #181

Fixed Begin() returning true on collapsed windows that loaded settings #176

ImVec2/ImVec4 no-parameters constructs init to 0.0f. Saner. Couldn't measure perf differences in a simple stress test compiled in Debug mode